BIOANALYTICAL SYSTEMS INC
S-1, 1997-09-26
LABORATORY APPARATUS & FURNITURE
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<PAGE>   1
 
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON SEPTEMBER 26, 1997
 
                                                    REGISTRATION NO. 333-
================================================================================
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------
 
                                    FORM S-1
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                            ------------------------
 
                          BIOANALYTICAL SYSTEMS, INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
                                    INDIANA
                        (STATE OR OTHER JURISDICTION OF
                         INCORPORATION OR ORGANIZATION)
 
                                      3815
                          (PRIMARY S.I.C. CODE NUMBER)
 
                                   35-1345024
                                (I.R.S. EMPLOYER
                              IDENTIFICATION NO.)
 
                            ------------------------
 
                                2701 KENT AVENUE
                         WEST LAFAYETTE, INDIANA 47906
                                 (765) 463-4527
         (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING
            AREA CODE, OF REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
                            ------------------------
 
                               PETER T. KISSINGER
                                   PRESIDENT
                          BIOANALYTICAL SYSTEMS, INC.
                                2701 KENT AVENUE
                         WEST LAFAYETTE, INDIANA 47906
                                 (765) 463-4527
           (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
                   INCLUDING AREA CODE, OF AGENT FOR SERVICE)
                            ------------------------
 
                                   COPIES TO:
 
                                BERKLEY W. DUCK
                           ICE MILLER DONADIO & RYAN
                         ONE AMERICAN SQUARE, BOX 82001
                        INDIANAPOLIS, INDIANA 46282-0002
                                 (317) 236-2270
                                 MARK SHAEVSKY
                        HONIGMAN MILLER SCHWARTZ & COHN
                          2290 FIRST NATIONAL BUILDING
                              660 WOODWARD AVENUE
                          DETROIT, MICHIGAN 48226-3583
                                 (313) 256-7562
 
                            ------------------------
 
    APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after this Registration Statement becomes effective.
 
    If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, check the following box.  [ ]
 
    If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering.  [ ]

    If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering.  [ ]
 
    If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box.  [ ]
                            ------------------------
 
                        CALCULATION OF REGISTRATION FEE
 
<TABLE>
<CAPTION>
=================================================================================================================================
                                                                PROPOSED MAXIMUM           PROPOSED
       TITLE OF EACH CLASS OF              AMOUNT TO BE          OFFERING PRICE       MAXIMUM AGGREGATE          AMOUNT OF
     SECURITIES TO BE REGISTERED          REGISTERED(1)           PER SHARE(2)        OFFERING PRICE(2)       REGISTRATION FEE
- ---------------------------------------------------------------------------------------------------------------------------------
<S>                                   <C>                    <C>                    <C>                    <C>
Common Shares........................       1,725,000                $11.00              $18,975,000               $5,750
==============================================================================================================================
</TABLE>
 
(1) Includes 225,000 Common Shares that may be sold if the over-allotment option
    granted to the Underwriters is exercised in full. See "Underwriting."
 
(2) Estimated solely for the purpose of calculating the registration fee
    pursuant to Rule 457(a) under the Securities Act of 1933.
 
                            ----------------------------
 
    THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933 OR UNTIL THIS REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
================================================================================
<PAGE>   2
 
     Information contained herein is subject to completion or amendment. A
     registration statement relating to these securities has been filed with the
     Securities and Exchange Commission. These securities may not be sold nor
     may offers to buy be accepted prior to the time the registration statement
     becomes effective. This prospectus shall not constitute an offer to sell or
     the solicitation of an offer to buy nor shall there be any sale of these
     securities in any State in which such offer, solicitation or sale would be
     unlawful prior to registration or qualification under the securities laws
     of any such State.
 
                SUBJECT TO COMPLETION, DATED SEPTEMBER   , 1997
 
PROSPECTUS
 
                            1,500,000 COMMON SHARES
 
                           BIOANALYTICAL SYSTEMS LOGO
 
                          BIOANALYTICAL SYSTEMS, INC.
 
     All of the 1,500,000 Common Shares offered hereby (the "Shares") are being
sold by Bioanalytical Systems, Inc. (the "Company"). Prior to this offering
there has been no public market for the Common Shares of the Company (the
"Common Shares"). It is currently estimated that the initial public offering
price will be between $9.00 and $11.00 per share. See "Underwriting" for a
discussion of information relating to the factors to be considered in
determining the initial public offering price. Application has been made to list
the Shares on the Nasdaq National Market under the symbol "BASI."
 
      SEE "RISK FACTORS" AT PAGE 5 FOR A DISCUSSION OF CERTAIN FACTORS THAT
SHOULD BE CONSIDERED BY PROSPECTIVE PURCHASERS OF THE SHARES OFFERED HEREBY.
 
                            ------------------------
 
  THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
 EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
   AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
                               CRIMINAL OFFENSE.
 
<TABLE>
<CAPTION>
=============================================================================================================
                                                                  UNDERWRITING
                                           PRICE TO              DISCOUNTS AND             PROCEEDS TO
                                            PUBLIC               COMMISSIONS(1)             COMPANY(2)
<S>                                <C>                      <C>                      <C>
- -------------------------------------------------------------------------------------------------------------
Per Share.........................            $                        $                        $
- -------------------------------------------------------------------------------------------------------------
Total(3)..........................            $                        $                        $
=============================================================================================================
</TABLE>
 
(1) The Company has agreed to indemnify the Underwriters against certain
    liabilities, including liabilities under the Securities Act of 1933, as
    amended (the "Securities Act"). See "Underwriting."
 
(2) Before deducting expenses of the offering payable by the Company, estimated
at $500,000.
 
(3) The Company has granted the Underwriters a 30-day option to purchase up to
    225,000 additional Shares, on the same terms and conditions set forth above,
    solely for the purpose of covering over-allotments, if any. If this option
    is exercised in full, the total Price to Public, Underwriting Discounts and
    Commissions, and Proceeds to Company will be $          , $          , and
    $          , respectively. See "Underwriting."
 
                            ------------------------
 
     The Shares are offered by the several Underwriters named herein, subject to
prior sale, when, as and if accepted by them, subject to their right to reject
any orders in whole or in part and subject to certain conditions. It is expected
that delivery of certificates representing the Shares will be made at the
offices of Roney & Co. L.L.C., One Griswold, Detroit, Michigan, 48226 on or
about                     , 1997.
 
                            ------------------------
 
RONEY & CO.                                                     THE OHIO COMPANY
 
                                            , 1997
<PAGE>   3
 
            [A COLLAGE OF PHOTOGRAPHS OF THE COMPANY'S PRODUCTS AND
     OF THE COMPANY'S SCIENTISTS PERFORMING SERVICES WILL BE INSERTED HERE]
 
                           -------------------------
 
     The Company intends to distribute to its shareholders annual reports
containing audited financial statements and will make available copies of
quarterly reports containing unaudited financial information for the first three
quarters of each fiscal year.
                           -------------------------
 
     CERTAIN PERSONS PARTICIPATING IN THIS OFFERING MAY ENGAGE IN TRANSACTIONS
THAT STABILIZE, MAINTAIN OR OTHERWISE AFFECT THE PRICE OF THE SHARES, INCLUDING
STABILIZING BIDS, SYNDICATE COVERING TRANSACTIONS OR THE IMPOSITION OF PENALTY
BIDS. FOR A DISCUSSION OF THESE ACTIVITIES, SEE "UNDERWRITING."
 
     IN CONNECTION WITH THIS OFFERING, CERTAIN UNDERWRITERS MAY ENGAGE IN
PASSIVE MARKET MAKING TRANSACTIONS IN THE SHARES ON NASDAQ IN ACCORDANCE WITH
RULE 103 OF REGULATION M. SEE "UNDERWRITING."
                           -------------------------
 
BAS(R) is a registered trademark of the Company. This Prospectus also includes
trade names and trademarks of other companies.
 
                                        2
<PAGE>   4
 
                               PROSPECTUS SUMMARY
 
     The following summary is qualified in its entirety by the more detailed
information, including "Risk Factors" and the Company's Consolidated Financial
Statements and related notes thereto, appearing elsewhere in this Prospectus.
Except as otherwise noted, all information in this Prospectus, including
financial information, share and per share data: (i) reflects the conversion of
all of the Company's outstanding Convertible Preferred Shares (the "Convertible
Preferred Shares") into Common Shares upon the completion of this offering; (ii)
assumes no exercise of the Underwriters' over-allotment option; and (iii)
reflects a 4.514 for 1 share split to be effected prior to the completion of
this offering. Terms used but not otherwise defined herein are defined in the
Glossary included herein.
 
                                  THE COMPANY
 
     The Company is a leading contract research organization providing research
and development resources through both its services and products to the
worldwide pharmaceutical, medical device and biotechnology industries. Founded
in 1974, the Company has over 23 years of experience in developing products and
methodologies to support the analytical chemistry requirements of the drug
discovery process. At its inception, the Company focused on providing new
products and procedures which facilitated research progress at client sites.
Recently, pharmaceutical companies have experienced increasing pressures to
bring products to market on a cost-effective and accelerated basis. Accordingly,
many clients have requested the Company to carry out proprietary projects at the
Company's facilities. As a result, the Company now derives its revenues from (i)
research services provided to clients and (ii) the sale of its analytical
instruments and other products. The Company believes that among contract
research organizations that provide in house statistical, clinical, and medical
services, it is the only one that designs and sells analytical instrumentation
products and, on the analytical instrument side, it is one of very few firms
that maintains a separate business for contract analytical services. The Company
intends to continue to take advantage of this unique industry niche.
 
     The Company's services are marketed to pharmaceutical and other
biotechnical companies involved in later stages of drug testing and the
Company's products are marketed to both public and private research
organizations engaged in the early stages of drug development. On the services
side, according to the Pharmaceutical Research and Manufacturing Association, in
1997 pharmaceutical and biotechnology companies will spend approximately $18.9
billion worldwide on research and development of which approximately 18% or $3.4
billion will be outsourced to independent contract service providers such as the
Company. On the products side, the Company competes in the $11 billion
analytical instrument industry.
 
     Over the past five years, the Company has provided its services and/or
products to all of the top 25 pharmaceutical companies in the world, as ranked
by 1996 research and development spending. As a result of its client focus;
reputation for high-quality services and products; capital investment in
state-of-the-art instrumentation and facilities; skilled and experienced
professional staff; and expertise in performing critical development and support
services, the Company believes that it is a value-added partner in solving its
clients' complex product development problems.
 
     The Company's operating strategies are derived from a strong base of
expertise in analytical chemistry. The Company will continue to (i) leverage the
synergy between the Company's services and products; (ii) invest in
state-of-the-art instrumentation; (iii) emphasize high-end testing services;
(iv) enhance client relationships; and (v) work with large innovator
pharmaceutical companies in the development of analytical methods for new drug
candidates as early as possible in the drug development process.
 
     The Company's objective is to continue to grow as a leading provider of
high-quality analytical chemistry support services to the worldwide
pharmaceutical, medical device and biotechnology industries. In order to
continue its growth, the Company intends to leverage its personnel, facilities,
technological expertise and information systems. The Company believes that it
will continue to differentiate itself from its competitors by increasing the
array of services and products offered to its clients, further enhancing the
Company's reputation of offering a turnkey approach to accurately and quickly
meet product development challenges faced by
                                        3
<PAGE>   5
 
clients. The Company has developed and implemented a business strategy intended
to accelerate growth and profitability, consisting of the following five
principal elements:
 
         - Increase technical staff to expand the volume of services provided
         - Implement a comprehensive marketing and sales program
         - Broaden the range of complimentary services provided
         - Expand geographically in strategic locations
         - Identify and effect key acquisitions
 
     The Company was incorporated under the laws of Indiana in 1975. The
Company's principal executive offices are located at 2701 Kent Avenue, West
Lafayette, Indiana, 47906, and its telephone number is (765) 463-4527.
 
                                  THE OFFERING
 
<TABLE>
<S>                                               <C>
Shares offered by the Company...................  1,500,000 Shares
Common Shares to be outstanding after the
  offering......................................  4,500,000 Common Shares(1)
Use of proceeds.................................  Repayment of indebtedness, purchase of laboratory
                                                  equipment, hiring of additional personnel, upgrade
                                                  of information systems, expansion of current
                                                  facilities, working capital and other general
                                                  corporate purposes, including potential
                                                  acquisitions. See "Use of Proceeds."
Proposed Nasdaq National Market symbol..........  BASI
</TABLE>
 
                      SUMMARY CONSOLIDATED FINANCIAL DATA
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                                              NINE MONTHS
                                                      YEAR ENDED SEPTEMBER 30,               ENDED JUNE 30,
                                           ----------------------------------------------   ----------------
                                            1992     1993      1994      1995      1996      1996     1997
                                            ----     ----      ----      ----      ----      ----     ----
<S>                                        <C>      <C>       <C>       <C>       <C>       <C>      <C>
STATEMENT OF INCOME DATA:
Product revenue..........................  $8,668   $ 9,124   $ 8,903   $ 9,627   $ 9,113   $6,725   $ 7,347
Services revenue.........................     904     1,663     1,800     2,725     3,681    2,670     3,691
                                           ------   -------   -------   -------   -------   ------   -------
  Total revenue..........................   9,572    10,787    10,703    12,352    12,794    9,395    11,038
Operating income.........................     677     1,128       609       784       701      328     1,199
Net income available to common
  shareholders...........................  $  400   $   886   $   495   $   497   $   347   $  136   $   644
Net income per Common Share..............  $  .14   $   .30   $   .16   $   .16   $   .11   $  .04   $   .21
Weighted average Common Shares
  outstanding............................   2,971     2,993     3,048     3,066     3,089    3,089     3,074
</TABLE>
 
<TABLE>
<CAPTION>
                                                                      JUNE 30, 1997
                                                              ------------------------------
                                                              ACTUAL          AS ADJUSTED(2)
                                                              ------          --------------
<S>                                                           <C>             <C>
BALANCE SHEET DATA:
Working capital.............................................  $ 3,362            $12,379
Total assets................................................   14,423             22,840
Long-term debt, less current portion........................    4,383                 --
Convertible Preferred Shares................................    1,231                 --
Shareholders' equity........................................    5,628             20,259
</TABLE>
 
- -------------------------
(1) Based on Common Shares outstanding at June 30, 1997, excluding 277,184
    Common Shares issuable upon exercise of options outstanding as of June 30,
    1997, of which 234,297 were exercisable as of that date. See
    "Capitalization," "Management -- Option Plans" and Note 6 of Notes to
    Consolidated Financial Statements. Also reflects the conversion of all
    outstanding Convertible Preferred Shares into 752,399 Common Shares to be
    effected immediately prior to the issuance of the Shares offered hereby.
 
(2) Adjusted to reflect (i) the conversion of all outstanding Convertible
    Preferred Shares into Common Shares to be effected immediately prior to the
    issuance of the Shares offered hereby, and (ii) the sale of 1,500,000 Shares
    offered hereby (after deducting the estimated underwriting discounts and
    commissions and offering expenses payable by the Company), assuming an
    initial public offering price of $10.00 per share (the midpoint of the range
    set forth on the cover page of this Prospectus).
                                        4
<PAGE>   6
 
                                  RISK FACTORS
 
     An investment in the Shares offered hereby involves a high degree of risk.
Prospective investors should consider carefully the following risk factors, in
addition to the other information contained in this Prospectus, prior to making
an investment in the Shares.
 
DEPENDENCE ON CERTAIN INDUSTRIES AND CLIENTS
 
     The Company's revenues are highly dependent on research and development
expenditures and compliance testing expenditures by the pharmaceutical,
biotechnology and medical device industries and by universities and government
research institutions worldwide. Decreases in such expenditures, including those
resulting from a general economic decline in these industries, could have a
material adverse effect on the Company. The Company has benefited from the
growing tendency of companies to engage independent organizations to conduct
development and testing projects. Any reduction in the outsourcing of research,
development or testing activities, or any reduction in public funding of science
and technology could have a material adverse effect on the Company's business,
operations and financial condition. There has been substantial consolidation in
recent years in the pharmaceutical industry, both in the United States and
Europe. It is not possible to assess the impact upon the Company of future
pharmaceutical industry consolidation since the effect may depend on an
acquiror's inclination to outsource or its existing relationship with the
Company or a competitor. See "Business -- Changing Nature of Pharmaceutical
Industry."
 
     During 1996, a major United States-based pharmaceutical company and the
Company's Japanese distributor accounted for approximately 18% and 19%,
respectively, of the Company's total revenues. There can be no assurance that
the Company's business will not continue to be dependent on continued
relationships with certain clients or distributors or that annual results will
not be dependent upon performance of a few large projects. In addition, there
can be no assurance that significant clients or distributors in any one period
will continue to be significant clients or distributors in other periods. See
"Business -- Clients" and "-- Sales and Marketing."
 
NEED TO ATTRACT, DEVELOP, MANAGE AND RETAIN PROFESSIONAL STAFF
 
     The Company's business is labor intensive and involves the delivery of
highly specialized professional services. The Company's future growth and
success depends in large part upon its ability to attract, develop, manage and
retain highly skilled professional, scientific and technical operating staff.
There is significant competition from the Company's competitors as well as from
the in-house research departments of pharmaceutical and biotechnology companies
and other enterprises for employees with the skills required to perform the
services offered by the Company. Although the Company has confidentiality
agreements with its scientific and technical operating personnel, the Company
does not have in place covenants not to compete that would directly preclude the
employees from being employed by a competitor. There can be no assurance that
the Company will be able to attract, develop, manage and retain a sufficient
number of highly skilled employees in the future or that it will continue to be
successful in training, retaining and managing its current employees. The loss
of a significant number of employees or the Company's inability to hire
sufficient numbers of qualified employees could have a material adverse effect
on the Company's business, operations and financial condition. See "Business --
Employees."
 
DEPENDENCE ON KEY EXECUTIVES
 
     The Company relies to a significant extent on a number of key executives,
including Peter T. Kissinger, Ph.D., its President and Chairman of the Board.
The Company maintains key man life insurance on Dr. Kissinger in the amount of
$1.0 million. The loss of the services of any of the Company's key executives
could have a material adverse effect on the Company's business, operations and
financial condition.
 
DEPENDENCE ON AND EFFECT OF GOVERNMENT REGULATION
 
     The Company's business depends in part on government regulation of the drug
development process by the United States and foreign governments. More stringent
governmental regulation of the drug development
 
                                        5
<PAGE>   7
 
process increases the need for services and products provided or produced by the
Company. Recently, legislation has been proposed that would substantially modify
the current requirements for FDA administration of the drug and device approval
process. Under the proposed legislation, applications for approval of new drugs
could be made to private accredited facilities in lieu of the FDA. As a result,
the number of clinical trials of new drugs would be reduced and other rules
administered by the FDA would be simplified. Any change in the scope of
regulatory requirements or the introduction of simplified drug or device
approval procedures could affect the Company's business, operations and
financial condition.
 
     The Company's revenues are also dependent, in part, upon continued
compliance with governmental requirements applicable to facilities and
techniques used in the manufacture of products for clinical use. The Company's
facilities are subject to scheduled periodic regulatory inspections to ensure
compliance with FDA requirements. Failure on the part of the Company to comply
with applicable requirements could result in the termination of ongoing
research, the disqualification of data for submission to regulatory authorities
and fines and penalties being assessed against the Company. See "Business --
Changing Nature of Pharmaceutical Industry" and "Business -- Government
Regulation."
 
COMPETITION
 
     With respect to its products, the Company primarily competes with several
large equipment manufacturers and, with respect to its services, the Company
primarily competes against in-house research departments of pharmaceutical and
biotechnology companies, universities and teaching hospitals and other
full-service CROs. Many of the Company's competitors possess substantially
greater capital, technical and other resources than the Company. Competitive
factors with respect to the Company's products include quality, reliability and
price. CROs generally compete on the basis of previous experience, medical and
scientific expertise in specific therapeutic areas, the quality of contract
research, the ability to organize and manage large-scale trials on a global
basis, medical database management capabilities, the ability to provide
statistical and regulatory services, the ability to recruit investigators, the
ability to integrate information technology with systems to improve the
efficiency of contract research, an international presence with strategically
located facilities, financial viability and price. The Company's failure to
compete effectively in any one or more of these areas could have a material
adverse effect on the Company's business, operations and financial condition.
See "Business -- Changing Nature of Pharmaceutical Industry" and "Business --
Competition."
 
NATURE OF CONTRACTS
 
     Generally, the Company's service contracts are terminable by the client
upon notice at any time. Contracts may be terminated for a variety of reasons,
including the client's decision to forego a particular study, failure of
products to satisfy safety requirements and unexpected or undesired product
testing results. The loss of business from a significant client or the
cancellation of a major contract or series of commitments could have a material
adverse effect on the Company's business, operations and financial condition.
See "Business -- Contractual Arrangements."
 
UNCERTAINTY OF INTERNATIONAL MARKETS
 
     In the nine months ended June 30, 1997, approximately 40% of the Company's
revenues were derived from customers located outside the United States. The
Company expects to increase its geographical diversification outside the United
States, including entering new markets in Asia and South America. Significant
governmental, regulatory, political, economic and cultural issues could affect
the growth or profitability of the Company's business activities in any such
market. In addition, although currently all of the Company's contracts are
required to be paid in United States dollars, in the event future contracts were
denominated in a foreign currency the Company could be faced with currency
fluctuations in the conversion to United States dollars.
 
                                        6
<PAGE>   8
 
PROPRIETARY TECHNOLOGY; UNPREDICTABILITY OF PATENT PROTECTION
 
     The Company's business is dependent, in part, on its ability to obtain
patents in various jurisdictions on its current and future technologies and
products, to defend its patents and protect its trade secrets and to operate
without infringing on the proprietary rights of others. There can be no
assurance that the Company's patents will not be challenged by third parties or
that, if challenged, those patents will be held valid. In addition, there can be
no assurance that any technologies or products developed by the Company will not
be challenged by third parties owning patent rights and, if challenged, will be
held to not infringe those patent rights. The expense involved in any patent
litigation can be significant. The Company also relies on unpatented,
proprietary technology, and there can be no assurance that others will not
independently develop or obtain similar products or technologies.
 
FUTURE CAPITAL REQUIREMENTS; UNCERTAINTY OF ADDITIONAL FUNDING
 
     The Company expects capital and operating expenditures to increase over the
next several years. Although the Company believes that the net proceeds from
this offering, existing cash and cash equivalents and anticipated cash flow from
operations will be sufficient to support the Company's operations for the
foreseeable future, the Company's actual future capital requirements will depend
on many factors, including its future profitability, the rate of its internal
growth and the timing, size and terms of acquisitions made by the Company, if
any. The Company may require significant additional financing in the future,
which it may seek to raise through public or private equity offerings or debt
financings. There can be no assurance that additional financing will be
available when needed or that, if available, such financing can be obtained on
terms favorable to the Company. To the extent the Company raises additional
capital by issuing equity securities, ownership dilution to existing
shareholders will result and may be substantial. See "Use of Proceeds,"
"Business -- Growth Strategy" and "Management's Discussion and Analysis of
Financial Condition and Results of Operations -- Liquidity and Capital
Resources."
 
RISK RELATED TO GROWTH THROUGH ACQUISITIONS
 
     The Company's growth strategy includes identifying and effecting selected
acquisitions. The Company has limited acquisition experience, and growth through
acquisition involves numerous risks, including the potential inability of the
Company to effectively assimilate the operations of acquired companies, the
expenses incurred in connection with failed acquisition attempts, the diversion
of management's attention from other business concerns and, in the case of
acquisitions of foreign companies, the risks presented by language and cultural
barriers and currency exchange rate fluctuations. There can be no assurance that
the Company will complete any future acquisitions or that acquisitions, if any,
will contribute favorably to the Company's business, operations and financial
condition. See "Business -- Growth Strategy."
 
IMMEDIATE AND SUBSTANTIAL DILUTION
 
     The purchasers of the Shares will experience immediate and substantial
dilution of the net tangible book value per share from the initial offering
price. See "Dilution."
 
VOLATILITY OF QUARTERLY OPERATING RESULTS
 
     The Company's results of operations have been and will continue to be
subject to quarterly fluctuations, principally as a result of the commencement,
completion, cancellation or duration of large contracts, the progress of ongoing
contracts, changes in the mix of products and services, the incurrence of
significant expenses upon commencement of product or service contracts before
any significant revenues are recognized from such activities, and seasonality in
the business. For this reason, there is a risk that comparisons of quarterly
operating results on a year-to-year basis, or on a quarter-to-quarter basis,
will not provide a meaningful indication of future performance. In addition,
fluctuations in quarterly results could affect the market price of the Common
Shares in a manner unrelated to the longer-term operating performance of the
Company. See "Management's Discussion and Analysis of Financial Condition and
Results of Operations -- Overview."
 
                                        7
<PAGE>   9
 
LIABILITY RISKS RELATED TO PRODUCTS AND THE PROVISION OF SERVICES
 
     Although the Company does not provide products or services directly to the
public, its business involves the sale of instruments for use by others and the
provision of contract analytical services. It is possible that claims could be
made against the Company by either its clients or the customers of its clients
for damages suffered as a result of the use of the Company's products or for
errors made in the performance of the Company's analytical services. The Company
maintains product liability and errors and omissions insurance with respect to
these risks, but there can be no assurance that the insurance would cover all
risks. The Company also seeks to reduce its exposure through indemnification
agreements with its clients. The scope of those agreements may vary from client
to client, and the performance of the clients' obligations thereunder are not
secured. There can be no assurance that these measures will be adequate to
protect the Company from damages resulting from defects in its products or
services. See "Business -- Product Liability and Insurance."
 
MANAGEMENT DISCRETION REGARDING NET PROCEEDS OF THE OFFERING
 
     The Company has not yet allocated a substantial portion of the net proceeds
of the offering to specific uses. Accordingly, management will have broad
discretion as to the application of the offering proceeds. Pending the Company's
use of such proceeds, the net proceeds of the offering will be invested in
high-quality, short-term, interest-bearing investment-grade debt securities,
certificates of deposit or direct or guaranteed obligations of the United
States. It is possible that the return on such investments will be less than
that which would be realized were the Company immediately to use such funds for
other purposes. See "Use of Proceeds."
 
CONCENTRATION OF OWNERSHIP
 
     Upon the completion of this offering, certain of the Company's executive
officers will beneficially own approximately 35% of the outstanding Common
Shares, and certain of the Company's non-employee directors will beneficially
own approximately 20% of the outstanding Common Shares. Accordingly, those
persons will be in a position to significantly influence the election of the
Company's directors and the outcome of corporate actions requiring shareholder
approval. This concentration of ownership may have the effect of delaying or
preventing a change in control of the Company. See "Management" and "Principal
Shareholders."
 
SHARES ELIGIBLE FOR FUTURE SALE; REGISTRATION RIGHTS
 
     The sale of substantial amounts of the Common Shares in the public market
following the offering could have an adverse effect on prevailing market prices
of the Common Shares. Immediately after the offering, the 1,500,000 Shares
(1,725,000 Shares if the Underwriters' over-allotment option is exercised in
full) offered hereby will be freely tradeable without restriction, and
approximately 600,000 additional Common Shares will be eligible for sale in the
public market pursuant to Rule 144(k) under the Securities Act. All of the
Company's directors and executive officers and certain of the Company's
shareholders have agreed with the Underwriters not to sell an aggregate of
2,334,592 Common Shares held by them for a period of 180 days from the date of
this Prospectus without the prior consent of the Underwriters. After such time,
or earlier with the written consent of the Underwriters, those Common Shares
will be eligible for sale, subject to the volume and other restrictions under
Rule 144 promulgated under the Securities Act. See "Shares Eligible For Future
Sale."
 
     The Company also intends to file a registration statement covering the sale
of Common Shares reserved for issuance under the Company's stock option plans
approximately 30 days following the date of this Prospectus. As of June 30,
1997, there were aggregate options outstanding under the Bioanalytical Systems,
Inc. 1990 Employee Incentive Stock Option Plan (the "1990 Employee Option Plan")
and the Bioanalytical Systems, Inc. Outside Director Stock Option Plan (the
"Director Option Plan") to purchase 277,184 Common Shares at a weighted average
price of $1.27 per share, of which 234,297 Common Shares were then vested and
exercisable. The holders of 171,772 of the options exercisable as of June 30,
1997 have signed Lock-Up Agreements. The Company also may issue and sell up to
95,000 Common Shares under the 1997 Employee Incentive Stock Option Plan (the
"1997 Employee Option Plan" and together with the 1990
 
                                        8
<PAGE>   10
 
Employee Option Plan and the Director Option Plan, the "Option Plans"). See
"Management -- Option Plans," and "Underwriting."
 
     Certain shareholders have the right to require the registration of their
Common Shares under the Securities Act at any time subject to certain
limitations but those shareholders have agreed not to exercise those rights for
a period of 180 days from the date of this Prospectus. See "Description of
Capital Stock -- Registration Rights." If those shareholders were to cause a
large number of Common Shares to be registered and sold in the public market
thereafter, the market price for the Common Shares could be materially adversely
affected. Additionally, those shareholders have the right to require the Company
to include their Common Shares in any Company-related registration under the
Securities Act, and the exercise of these "piggyback" registration rights could
have a material adverse effect on the Company's ability to raise capital in the
future. See "Certain Transactions."
 
NO PRIOR MARKET; POTENTIAL STOCK PRICE VOLATILITY
 
     Prior to this offering, there has been no public market for the Common
Shares and there can be no assurance that an active trading market will develop
or be sustained after this offering. The initial public offering price will be
determined through negotiations between the Company and the Underwriters and may
not represent prices that will prevail in the trading market. See
"Underwriting."
 
     The market price of the Common Shares could be subject to wide fluctuations
in response to variations in operating results from quarter to quarter, changes
in earnings estimates by analysts, market conditions in the industry and general
economic conditions. See "Risk Factors -- Volatility of Quarterly Operating
Results." Furthermore, the stock market has experienced significant price and
volume fluctuations unrelated to the operating performance of particular
companies. These market fluctuations may have an adverse effect on the market
price of the Common Shares. Following the offering, the Company will have
approximately 4.5 million Common Shares outstanding, of which approximately 2.0
million Common Shares could be considered to be part of the "float." Based on
the anticipated initial public offering price of between $9.00 and $11.00 per
share, the market capitalization of the Company would be approximately $40.5
million to $49.5 million. As a result of the small "float" and market
capitalization, the Company's Common Shares will be subject to volatility. The
price volatility of the Common Shares could be accentuated by quarterly
fluctuations in earnings. See "Risk Factors -- Volatility of Quarterly Operating
Results."
 
POSSIBLE ISSUANCE OF PREFERRED SHARES
 
     The Board of Directors of the Company has the authority to issue preferred
shares in the future without further shareholder approval and upon such terms
and conditions, and having such rights, privileges and preferences, as the Board
of Directors may determine. The issuance of preferred shares, while providing
desirable flexibility in connection with possible acquisitions and other
corporate purposes, could adversely affect the market price of the Common Shares
and could have the effect of making it more difficult for a third party to
acquire, or of discouraging a third party from acquiring, a majority of the
outstanding voting securities of the Company. The Company has no present plans
to issue any preferred shares. See "Description of Capital Stock."
 
DIVIDEND POLICY
 
     The Company has never paid any cash dividends to holders of its Common
Shares and does not anticipate paying any cash dividends in the foreseeable
future, but intends instead to retain any future earnings for reinvestment in
its business. Any future determination as to the payment of dividends will be
made at the discretion of the Board of Directors of the Company and will depend
upon the Company's operating results, financial condition, capital requirements,
general business conditions and such other factors as the Board of Directors
deems relevant. See "Dividend Policy."
 
                                        9
<PAGE>   11
 
                                USE OF PROCEEDS
 
     The net proceeds to the Company from the sale of the 1,500,000 Shares
offered hereby are estimated to be $13.4 million ($15.5 million if the
Underwriter's over-allotment option is exercised in full), assuming an initial
public offering price of $10.00 per share (the midpoint of the range set forth
on the cover page of this Prospectus) and after deducting the underwriting
discounts and commissions and estimated offering expenses payable by the
Company. The Company intends to utilize approximately $5.0 million to repay bank
indebtedness and approximately $3.0 million to purchase laboratory equipment.
The Company also intends to utilize a portion of the net proceeds to hire
additional technical staff and to upgrade its information systems. These
expenditures will primarily supplement and expand capabilities for existing
services offered to clients. In addition, the Company intends to use a portion
of the proceeds from the offering to expand its present facilities as well as to
fund future geographic expansion. The Company will use the remainder of the net
proceeds for working capital and other general corporate purposes, including
potential acquisitions. Pending such uses, the Company intends to invest the
remaining proceeds of the offering in high-quality, short-term,
interest-bearing, investment-grade debt securities, certificates of deposit or
direct or guaranteed obligations of the United States.
 
     As part of its business strategy, the Company reviews many acquisition
candidates in the ordinary course of business, although the Company currently
has no agreements or arrangements in place with respect to any future
acquisition. There can be no assurance that the Company will complete any
acquisitions.
 
                                DIVIDEND POLICY
 
     The Company has never paid cash dividends on its Common Shares and does not
anticipate paying any cash dividends in the foreseeable future. The Company
currently intends to retain any future earnings to develop and expand its
business. The Company is currently restricted from paying cash dividends under
the terms of its lines of credit without the prior written consent of the bank.
 
                                       10
<PAGE>   12
 
                                    DILUTION
 
     The net tangible book value of the Company as of June 30, 1997 was
approximately $6.6 million or $2.22 per share after giving effect to the
conversion of the outstanding Convertible Preferred Shares into Common Shares
and the 4.514 for 1 share split to be effected prior to the issuance of the
Shares offered hereby. The net tangible book value per share is equal to the
book value of the Company's total tangible assets less its total liabilities,
divided by the total number of Common Shares outstanding. After giving effect to
the sale by the Company of 1,500,000 Shares offered hereby at an assumed public
offering price of $10.00 per share (resulting in estimated net proceeds of $13.4
million after deducting the estimated underwriting discounts and commissions and
estimated offering expenses), the net tangible book value of the Company as of
June 30, 1997 would be approximately $20.0 million, or $4.45 per share. This
represents an immediate increase of $2.23 per share to existing shareholders and
an immediate dilution of $5.55 per share to new investors. The following table
illustrates this per share dilution:
 
<TABLE>
<S>                                                             <C>      <C>
Initial public offering price per share.....................             $10.00
  Net tangible book value per share before the offering.....    $2.22
  Increase in net tangible book value per share attributable
     to new investors.......................................     2.23
                                                                -----
Net tangible book value per share after offering............               4.45
                                                                         ------
Dilution per share to new investors.........................             $ 5.55
                                                                         ======
</TABLE>
 
     To the extent that the Underwriters' over-allotment option is exercised in
full, the net tangible book value of the Company at June 30, 1997 would have
been approximately $22.1 million, or $4.69 per share, representing an immediate
increase in net tangible book value per share of $2.47 to existing shareholders
and an immediate dilution of $5.31 per share to new investors.
 
     The following table summarizes, as of June 30, 1997, the differences in the
number of Common Shares purchased from the Company, the total consideration paid
to the Company and the average price per share paid by the existing shareholders
and by the new investors with respect to the Shares offered hereby, assuming an
initial public offering price of $10.00 per share and before deduction of
estimated underwriting discounts and commissions and estimated offering
expenses:
 
<TABLE>
<CAPTION>
                                                SHARES PURCHASED        TOTAL CONSIDERATION(1)       AVERAGE
                                              --------------------      ----------------------        PRICE
                                               NUMBER      PERCENT        AMOUNT       PERCENT      PER SHARE
                                               ------      -------        ------       -------      ---------
<S>                                           <C>          <C>          <C>            <C>          <C>
Existing shareholders(1)..................    3,000,000      66.7%      $ 1,907,350      11.3%       $ 0.64
New investors.............................    1,500,000      33.3        15,000,000      88.7        $10.00
                                              ---------     -----       -----------     -----
Total.....................................    4,500,000     100.0%      $16,907,350     100.0%
                                              =========     =====       ===========     =====
</TABLE>
 
- -------------------------
(1) The above computations exclude options outstanding at June 30, 1997 to
    purchase a total of 277,184 Common Shares at a weighted average exercise
    price of $1.27 per share. To the extent these options are exercised, there
    will be further dilution to new investors. See "Capitalization," "Management
    -- Option Plans" and Note 6 of Notes to Consolidated Financial Statements.
 
                                       11
<PAGE>   13
 
                                 CAPITALIZATION
 
     The following table sets forth the consolidated capitalization of the
Company as of June 30, 1997, on an actual basis and as adjusted (i) to give
effect to the conversion of all outstanding Convertible Preferred Shares into
Common Shares immediately prior to the issuance of the Shares offered hereby and
(ii) to reflect the sale of the 1,500,000 Shares offered hereby at an assumed
initial public offering price of $10.00 per share and the receipt of the
estimated net proceeds therefrom. See "Use of Proceeds."
 
<TABLE>
<CAPTION>
                                                                  JUNE 30, 1997
                                                              ----------------------
                                                                              AS
                                                               ACTUAL      ADJUSTED
                                                               ------      --------
                                                              (IN THOUSANDS, EXCEPT
                                                                   SHARES DATA)
<S>                                                           <C>         <C>
Short-term debt.............................................    $   600     $    --
                                                                =======     =======
Long-term debt, less current portion........................    $ 4,383     $    --
Preferred Shares:
  1,000,000 Preferred Shares authorized and
     166,667 Convertible Preferred Shares outstanding
     (actual),
     none outstanding (as adjusted).........................      1,231          --
Shareholders' equity:
  Common Shares, 19,000,000 shares authorized and 2,247,601
     shares outstanding (actual); 4,500,000 shares
     outstanding (as adjusted)(1)...........................        498         997
  Additional paid-in capital................................        178      14,310
  Retained earnings.........................................      4,965       4,965
  Currency translation adjustment...........................        (13)        (13)
                                                                -------     -------
       Total shareholders' equity...........................      5,628      20,259
                                                                -------     -------
       Total capitalization.................................    $11,242     $20,259
                                                                =======     =======
</TABLE>
 
- -------------------------
(1) Does not include 277,184 Common Shares issuable upon exercise of options
    outstanding as of June 30, 1997, of which 234,297 were exercisable as of
    that date. See "Management -- Option Plans" and Note 6 of Notes to
    Consolidated Financial Statements.
 
                                       12
<PAGE>   14
 
                      SELECTED CONSOLIDATED FINANCIAL DATA
 
     The following selected consolidated statement of income data for the years
ended September 30, 1994, 1995 and 1996 and the balance sheet data as of
September 30, 1995 and 1996 are derived from and should be read in conjunction
with the financial statements and notes thereto included elsewhere herein,
audited by Ernst & Young LLP. The selected statement of income data for the
years ended September 30, 1992 and 1993 and selected balance sheet data as of
September 30, 1992, 1993 and 1994 also are derived from audited financial
statements, which are not included herein. The selected statement of income data
for the nine months ended June 30, 1996 and 1997 and the selected balance sheet
data as of June 30, 1997 are derived from unaudited financial statements of the
Company. In the opinion of the Company, the unaudited financial statements
include all adjustments, consisting only of normal recurring adjustments,
necessary for a fair presentation of the results for the periods. The financial
results for the nine months ended June 30, 1997 are not necessarily indicative
of the results to be expected for any other interim period or the full year. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations."
 
<TABLE>
<CAPTION>
                                                                                             NINE MONTHS
                                                                                                ENDED
                                                     YEAR ENDED SEPTEMBER 30,                  JUNE 30,
                                          ----------------------------------------------   ----------------
                                           1992     1993      1994      1995      1996      1996     1997
                                           ----     ----      ----      ----      ----      ----     ----
                                                        (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                       <C>      <C>       <C>       <C>       <C>       <C>      <C>
STATEMENT OF INCOME DATA:
Product revenue.........................  $8,668   $ 9,124   $ 8,903   $ 9,627   $ 9,113   $6,725   $ 7,347
Services revenue........................     904     1,663     1,800     2,725     3,681    2,670     3,691
                                          ------   -------   -------   -------   -------   ------   -------
  Total revenue.........................   9,572    10,787    10,703    12,352    12,794    9,395    11,038
Cost of product revenue.................   3,662     3,479     3,418     3,448     3,227    2,335     2,268
Cost of services revenue................     496       833     1,039     1,834     2,141    1,609     2,157
                                          ------   -------   -------   -------   -------   ------   -------
  Total cost of revenue.................   4,158     4,312     4,457     5,282     5,368    3,944     4,425
                                          ------   -------   -------   -------   -------   ------   -------
Gross profit............................   5,414     6,475     6,246     7,070     7,426    5,451     6,613
                                          ------   -------   -------   -------   -------   ------   -------
Operating expenses:
  Selling...............................   3,023     3,366     3,531     3,940     3,937    2,987     3,094
  Research and development..............     931     1,099     1,122     1,124     1,424    1,089     1,110
  General and administrative............     783       882       984     1,222     1,364    1,047     1,210
                                          ------   -------   -------   -------   -------   ------   -------
Operating income, net...................     677     1,128       609       784       701      328     1,199
Other income (expense)..................      15        28       192       111       (18)      (6)      (58)
                                          ------   -------   -------   -------   -------   ------   -------
Income before income taxes..............     692     1,156       801       895       683      322     1,141
Income taxes............................     239       216       253       344       283      132       470
                                          ------   -------   -------   -------   -------   ------   -------
Net income..............................  $  453   $   940   $   548   $   551   $   400   $  190   $   671
                                          ======   =======   =======   =======   =======   ======   =======
Net income available to common
  shareholders..........................  $  400   $   886   $   495   $   497   $   347   $  136   $   644
Net income per Common Share.............  $  .14   $   .30   $   .16   $   .16   $   .11   $  .04   $   .21
Weighted average Common Shares
  outstanding...........................   2,971     2,993     3,048     3,066     3,089    3,089     3,074
</TABLE>
 
<TABLE>
<CAPTION>
                                                          SEPTEMBER 30,                   JUNE 30,
                                            ------------------------------------------   ----------
                                             1992     1993     1994     1995     1996       1997
                                             ----     ----     ----     ----     ----       ----
                                                                (IN THOUSANDS)
<S>                                         <C>      <C>      <C>      <C>      <C>      <C>
BALANCE SHEET DATA:
Working capital...........................  $3,503   $3,897   $4,392   $4,080   $3,059     $3,362
Property and equipment, net...............   2,178    2,494    2,736    3,707    6,479      8,633
Total assets..............................   6,809    7,800    8,163    9,428   11,374     14,423
Long-term debt, less current portion......     488      239      187      416    2,512      4,383
Preferred shares..........................   1,940    1,994    2,047    2,100    1,530      1,231
Shareholders' equity......................   2,661    3,547    4,056    4,609    4,956      5,628
</TABLE>
 
                                       13
<PAGE>   15
 
          MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
                           AND RESULTS OF OPERATIONS
 
     The following discussion and analysis should be read in conjunction with
Selected Consolidated Financial Data and the Company's Consolidated Financial
Statements and notes thereto included elsewhere in this Prospectus. In addition
to the historical information contained herein, the discussions in this
Prospectus may contain forward-looking statements that involve risks and
uncertainties. The Company's actual results could differ materially from those
discussed herein. Factors that could cause or contribute to such differences
include, but are not limited to, those discussed below and in the section
entitled "Risk Factors," as well as those discussed elsewhere in this
Prospectus.
 
OVERVIEW
 
     The Company provides a broad range of value-added products and services
focused on chemical analysis to the worldwide pharmaceutical, medical device and
biotechnology industries. The Company's customer-focused approach and its high
quality products and services enable it to serve as a value-added partner in
solving complex scientific problems by providing cost-effective results to its
customers on an accelerated basis. Founded in 1974 in Lansing, Michigan and
relocated to West Lafayette, Indiana in 1975, the Company has experienced growth
primarily through internal expansion, supplemented by strategic acquisitions. As
part of its internal growth strategy, the Company has developed technical
specialties in such areas as chromatography, electrochemistry, in vivo sampling
and mass spectrometry. The Company's growth has strategically positioned it to
take advantage of globalization in the marketplace and to provide new services
and areas of technical expertise to its customers. During this phase, the
Company has been continuously profitable since 1987.
 
     Throughout its history, the Company has taken steps to position itself as a
global leader in the analytical chemistry field. Development of the Company's
infrastructure began in 1975 when it established relationships with several
customers and multiple international distributors. In 1981, the Company
increased its sphere of influence to include Japan with the creation of BAS
Japan, an independent distributor. In 1988, the Company enhanced its computer
software expertise by acquiring Interactive Microware Inc. in State College,
Pennsylvania. In 1990, the Company began offering contract services to customers
that lacked the time or expertise to perform certain analyzes using the
Company's analytical products. In 1991, the Company further expanded its global
presence by establishing an office in Brussels, Belgium, and in 1995, the
Company acquired a distributor, BAS Technicol Ltd., to further solidify its
presence in the United Kingdom.
 
     Revenues are derived principally from (i) the sale of the Company's
analytical instruments and other products, and (ii) analytical services provided
to customers. Both methods of generating revenue utilize the Company's ability
to identify, isolate and resolve client problems relating to the separation and
quantification of individual substances in complex mixtures. The Company's
analytical products are sold primarily to pharmaceutical firms and research
organizations. The Company supports the pharmaceutical industry by focusing on
analytical chemistry for biomedical research, diagnostics, electrochemistry and
separations science. Principal customers include scientists engaged in drug
metabolism studies, as well as those engaged in basic neuroscience research. The
Company was the first to commercialize the liquid chromatography and
electrochemistry technology which is now the worldwide standard for the
determination of neurotransmitter substances. Research products include in vivo
sampling devices, reagent chemicals, electrochemical apparatus and sensors.
 
     Revenue from the sale of the Company's products and the related costs are
recognized upon shipment of the products to customers. The Company's
pharmaceutical service contracts generally have terms ranging from several
months to several years. A portion of the contract fee is generally payable upon
receipt of the initial samples with the balance payable in installments over the
life of the contract. The contracts are broken down into discrete units of
deliverable services for which a fixed fee for each unit is established, and
revenue and related direct costs are recognized as specific contract terms are
fulfilled under the percentage of completion method utilizing units of delivery.
The termination of a contract results in no material adjustments to revenue or
direct costs previously recognized, and the Company is entitled to payment for
all work performed through the date of notice of termination and all costs
associated with termination of a contract.
 
                                       14
<PAGE>   16
 
     The Company's management believes that fluctuations in the Company's
quarterly results are caused by a number of factors, including the Company's
success in attracting new business, the size and duration of service contracts,
the timing of its client's decisions to enter into new contracts, the
cancellation or delays of on-going contracts, the timing of acquisitions and
other factors, many of which are beyond the Company's control. See "Risk Factors
- -- Volatility of Quarterly Operating Results."
 
RESULTS OF OPERATIONS
 
     The following table sets forth, for the periods indicated, certain
statement of income data as a percentage of total revenue.
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF REVENUE
                                                         -------------------------------------------------
                                                                                            NINE MONTHS
                                                                                               ENDED
                                                          YEAR ENDED SEPTEMBER 30,            JUNE 30,
                                                         ---------------------------      ----------------
                                                         1994       1995       1996       1996       1997
                                                         ----       ----       ----       ----       ----
<S>                                                      <C>        <C>        <C>        <C>        <C>
Product revenue....................................       83.2%      77.9%      71.2%      71.6%      66.6%
Services revenue...................................       16.8       22.1       28.8       28.4       33.4
                                                         -----      -----      -----      -----      -----
  Total revenue....................................      100.0      100.0      100.0      100.0      100.0
Cost of product revenue............................       31.9       27.9       25.2       24.9       20.5
Cost of services revenue...........................        9.7       14.9       16.8       17.1       19.6
                                                         -----      -----      -----      -----      -----
  Total cost of revenue............................       41.6       42.8       42.0       42.0       40.1
Gross profit.......................................       58.4       57.2       58.0       58.0       59.9
Operating expenses:
  Selling..........................................       33.0       31.9       30.8       31.8       28.0
  Research and development.........................       10.5        9.1       11.2       11.6       10.1
  General and administrative.......................        9.2        9.9       10.7       11.1       11.0
                                                         -----      -----      -----      -----      -----
Operating income...................................        5.7        6.3        5.5        3.5       10.8
Other income (expense), net........................        1.8        0.9       (0.2)       0.1       (0.5)
                                                         -----      -----      -----      -----      -----
Income before income taxes.........................        7.5        7.2        5.3        3.4       10.3
Income taxes.......................................        2.4        2.8        2.2        1.4        4.3
                                                         -----      -----      -----      -----      -----
Net income.........................................        5.1%       4.4%       3.1%       2.0%       6.0%
                                                         =====      =====      =====      =====      =====
</TABLE>
 
     Nine Months ended June 30, 1997 Compared with Nine Months ended June 30,
1996
 
     Total revenue for the nine months ended June 30, 1997 increased 17.5% to
approximately $11.0 million from approximately $9.4 million for the nine months
ended June 30, 1996. Of this $1.6 million increase, approximately $1.0 million
was attributable to increased revenue from the services unit as a result of the
expansion of the types and volume of services provided by the Company. The
remaining $600,000 related to increased product sales resulting from increased
sales of electrochemical products, primarily in the Far East.
 
     Costs of revenue include costs related to the products sold and services
rendered including compensation and related fringe benefits for
non-administrative employees. These costs increased 12.2% to approximately $4.4
million for the nine months ended June 30, 1997 from approximately $3.9 million
for the nine months ended June 30, 1996. This increase of approximately $500,000
was due to the hiring of additional support staff in the services unit to meet
client needs. Costs of revenue for the Company's products decreased to 30.9% as
a percentage of product revenue for the nine months ended June 30, 1997 from
34.7% of product revenue for the nine months ended June 30, 1996, due to a shift
toward the sale of more profitable products. Costs of revenue for the Company's
services decreased to 58.4% as a percentage of services revenue for the nine
months ended June 30, 1997 from 60.3% of services revenue for the nine months
ended June 30, 1996, due to an increase in the level of services revenue.
 
                                       15
<PAGE>   17
 
     Selling expenses for the nine months ended June 30, 1997 increased 3.5% to
approximately $3.1 million from approximately $3.0 million during the nine
months ended June 30, 1996 due to increased commissions on foreign sales.
General and administrative expenses include all expenses other than selling and
research and development expenses not directly chargeable to a specific product
or service. General and administrative expenses for the nine months ended June
30, 1997 increased 15.6% to approximately $1.2 million from approximately $1.0
million during the nine months ended June 30, 1996 as a result of increased real
estate taxes incurred in connection with the Company's purchase and construction
of additional facilities.
 
     The loss from other income (expense), net, increased in the nine months
ended June 30, 1997 from the nine months ended June 30, 1996 primarily as a
result of a reduction in interest income due to a reduction in cash and cash
equivalents resulting from the redemption of Redeemable Preferred Shares owned
by Middlewest Ventures II, L.P. and Primus Capital Fund II, L.P.(collectively,
the "Venture Funds") in accordance with their terms.
 
     The Company's effective tax rate for the first nine months of 1997 is
estimated to be 42% as compared to 41% for the first nine months of 1996.
 
     Year ended September 30, 1996 Compared with Year ended September 30, 1995
 
     Total revenue for the year ended September 30, 1996 increased 3.6% to
approximately $12.8 million from approximately $12.4 million in the year ended
September 30, 1995. The net increase of approximately $400,000 related to
increased revenue from services, which increased to approximately $3.7 million
in the year ended September 30, 1996 from approximately $2.7 million in the year
ended September 30, 1995 as a result of the expansion of types and volume of
services provided by the Company. During this same period, product revenue
decreased to approximately $9.1 million for the year ended September 30, 1996
from approximately $9.6 million for the year ended September 30, 1995 primarily
as a result of increased industry competition in the liquid chromatography
market.
 
     Costs of revenue increased 1.6% to approximately $5.4 million for the year
ended September 30, 1996 from approximately $5.3 million for the year ended
September 30, 1995. This increase of approximately $100,000 was due to the
hiring of additional support staff in the services unit. Costs of revenue for
the Company's products decreased to 35.4% as a percentage of product revenue for
the year ended September 30, 1996 from 35.8% of product revenue for the year
ended September 30, 1995, due to a change in product mix. Costs of revenue for
the Company's services decreased to approximately 58.2% as a percentage of
service revenue for the year ended September 30, 1996 from approximately 67.3%
of services revenue for the year ended September 30, 1995 due to an increase in
the level of services revenue.
 
     Research and development expenses for the year ended September 30, 1996
increased 26.7% to $1.4 million from approximately $1.1 million for the year
ended September 30, 1995 due to the development of the in vitro product line.
General and administrative expenses for the year ended September 30, 1996
increased 11.6% to approximately $1.4 million from approximately $1.2 million
for the year ended September 30, 1995, primarily as a result of increased
property taxes incurred in connection with the Company's purchase and
construction of additional facilities.
 
     Other income (expense), net, decreased to approximately $(18,000) in the
year ended September 30, 1996 from approximately $111,000 in the year ended
September 30, 1995 as a result of a reduction in interest income due to a
reduction in cash and cash equivalents resulting from the redemption of
Redeemable Preferred Shares owned by the Venture Funds in accordance with their
terms.
 
     The Company's effective tax rate for 1996 was 41.4% as compared to 38.5%
for fiscal 1995. This increase was due, in part, to operating losses from
operations in the United Kingdom for which there is no corresponding income tax
deduction and to increased state income taxes.
 
     Year ended September 30, 1995 Compared with Year ended September 30, 1994
 
     Total revenue for the year ended September 30, 1995 increased 15.4% to
approximately $12.4 million from approximately $10.7 million in the year ended
September 30, 1994. Of this $1.7 million increase,
 
                                       16
<PAGE>   18
 
approximately $900,000 was attributable to increased revenue from the services
unit as a result of the expansion of types and volume of services provided by
the Company and approximately $800,000 related to increased product sales
resulting from increased sales of electrochemical products, primarily in the Far
East.
 
     Costs of revenue increased 18.5% to approximately $5.3 million for the year
ended September 30, 1995 from approximately $4.5 million for the year ended
September 30, 1994. This increase of approximately $800,000 was due to the
hiring of additional support staff in the services unit in anticipation of new
business in future periods. Costs of revenue for the Company's products
decreased to 35.8% as a percentage of product revenue for the year ended
September 30, 1995 from 38.4% of product revenue for the year ended September
30, 1994, due to a change in product mix. Costs of revenue for the Company's
services increased to 67.3% as a percentage of services revenue for the year
ended September 30, 1995 from 57.8% of services revenue for the year ended
September 30, 1994 due to the addition of support staff in the services unit to
meet client needs.
 
     Selling expenses for the year ended September 30, 1995 increased 11.6% to
approximately $3.9 million from approximately $3.5 million for the year ended
September 30, 1994, due primarily to increased commissions on foreign sales.
General and administrative expenses for the year ended September 30, 1995
increased 24.2% to approximately $1.2 million from approximately $984,000 during
the year ended September 30, 1994 as a result of operations in the United
Kingdom.
 
     Other income (expense), net, decreased to approximately $111,000 for the
year ended September 30, 1995 from approximately $192,000 for the year ended
September 30, 1994 in part due to a decrease in interest income.
 
     The Company's effective tax rate for 1995 was 38.5% as compared to 31.6%
for 1994. This increase was due, in part, to operating losses from its
operations in the United Kingdom for which there is no corresponding income tax
deduction.
 
LIQUIDITY AND CAPITAL RESOURCES
 
     Since its inception, the Company's principal sources of cash have been cash
flow generated from operations and funds received from venture capital
investments, the most recent of which was a $2.0 million financing completed in
March 1991. At June 30, 1997, the Company had cash and cash equivalents of
approximately $240,000, compared to cash and cash equivalents of approximately
$600,000 at September 30, 1996 and approximately $1.8 million as of September
30, 1995. The decrease in cash resulted primarily from increased capital
expenditures made to expand the Company's facilities and operations. The
expansion was partially financed by cash provided by operating activities, and a
$5.0 million credit facility.
 
     The Company's net cash provided by operating activities was approximately
$367,000 for the nine months ended June 30, 1997. Cash used in operations during
the nine months ended June 30, 1997 consisted of net income of approximately
$671,000 plus non-cash charges of approximately $851,000 partially offset by a
net increase of approximately $1.2 million in operating assets and liabilities.
The most significant increase in operating assets related to trade accounts
receivable, which increased to approximately $2.2 million at June 30, 1997 from
approximately $1.6 million at September 30, 1996, due primarily to sales growth.
 
     Cash used by investing activities increased to approximately $2.6 million
for the nine months ended June 30, 1997 from approximately $560,000 for the nine
months ended June 30, 1996, primarily as a result of the Company's purchase and
construction of additional facilities. Cash provided by financing activities for
the first nine months of fiscal 1997 was approximately $1.9 million due to an
increase in the Company's long term debt and offset by the redemption of
Redeemable Preferred Shares in accordance with their terms.
 
     The Company's net cash provided by operating activities was approximately
$301,000 for the year ended September 30, 1996, resulting from approximately
$400,000 of net income and reduced by a net increase in operating assets and
liabilities which was partially offset by non-cash charges. Trade accounts
receivable remained relatively constant at approximately $1.6 million at
September 30, 1996 as compared to September 30, 1995.
 
                                       17
<PAGE>   19
 
     Cash used by investing activities increased to approximately $3.2 million
for fiscal 1996 from approximately $1.3 million for fiscal 1995, primarily as a
result of the Company's purchase and construction of additional facilities. Cash
provided by financing activities for fiscal 1996 was approximately $1.7 million
due to an increase in the Company's long term debt incurred for the facilities
expansion and offset by the redemption of Redeemable Preferred Shares in
accordance with their terms.
 
     Total expenditures by the Company for property and equipment were
approximately $458,000, $1.3 million $3.2 million and $2.6 million in fiscal
1994, 1995, 1996 and for the nine months ended June 30, 1997, respectively.
Expenditures made in connection with the expansion of the Company's operating
facilities and purchases of laboratory equipment account for the largest
portions of these expenditures. Total capital expenditures in fiscal 1997 are
expected to be approximately $4.0 million, and the Company anticipates increased
levels of capital expenditures in fiscal 1998 and fiscal 1999. The increased
capital investments relate to the completion of the renovation and construction
of the additional facilities and the purchase of additional laboratory equipment
corresponding to anticipated increases in research services to be provided by
the Company. The Company also expects to make other investments to expand its
operations, through internal growth and strategic acquisitions, alliances and
joint ventures. However, the Company currently has no firm commitments for
capital expenditures other than in connection with the expansion of the
Company's facilities.
 
     The Company believes that cash generated from its operations, amounts
available under its existing bank lines of credit and credit facility and the
net proceeds from this offering will be sufficient to fund the Company's working
capital and capital expenditure requirements for the foreseeable future.
 
     The Company has a bank line of credit agreement which expires March 1, 1998
and allows borrowings of the lesser of 50.0% of inventories plus 80.0% of
qualified accounts receivable or $2.2 million. Interest is charged at the prime
rate plus .25% (8.50% at June 30, 1997). At September 30, 1996, the collateral
base for this line of credit resulted in borrowing availability of approximately
$2.0 million all of which was unused at September 30, 1996. At June 30, 1997,
$300,000 was outstanding on this line. The line is collateralized by inventories
and accounts receivable. The Company has a second line of credit agreement with
the same bank for capital expenditures which expires March 1, 1998 and allows
borrowings of the lesser 80% of capital expenditures or $1,000,000. Interest is
charged at the prime rate plus .25% (8.50% at June 30, 1997). At June 30, 1997,
this line was unused. The line is collateralized by fixed assets, inventories
and accounts receivable. The Company has entered into negotiations with the bank
to increase the amounts available under these lines of credit and extend the
expiration dates upon completion of the sale of the Shares offered hereby,
although there can be no assurance that such negotiations will be successful.
 
     During 1996, the Company entered into a credit facility for up to $5.0
million for the purchase and renovation of an adjacent building. At maturity of
this facility on January 31, 1998, the loan may be converted to a five year term
loan based upon a 20 year amortization funding on a conventional commercial
mortgage basis or with fixed principal payments plus interest. Interest is
charged at the prime rate plus .25% (8.50% at June 30, 1997). This credit
facility is collateralized by substantially all of the Company's property and
equipment. The agreement contains certain covenants which, among other things,
require the Company to maintain minimum levels of tangible net worth and debt
service coverage. At August 31, 1997, approximately $4.6 million was outstanding
on this line of credit.
 
INFLATION
 
     To date, the Company believes that the effects of inflation have not had a
material adverse effect on its business, operations or financial condition.
 
NEW ACCOUNTING PRONOUNCEMENTS
 
     In July, 1997, the Financial Accounting Standards Board (the "FASB") issued
Statement No. 131 ("SFAS 131"), "Disclosures about Segments of an Enterprise and
Related Information." Under SFAS 131, the Company will report financial and
descriptive information about its operating segments. SFAS 131 is effective for
fiscal years beginning after December 15, 1997. The Company plans to adopt SFAS
131 on October 1, 1998. The Company has not yet evaluated the impact of adoption
of SFAS 131.
 
                                       18
<PAGE>   20
 
     In June 1997, the FASB issued Statement of Financial Accounting Standards
No. 130 ("SFAS 130"), "Reporting Comprehensive Income." SFAS 130 establishes
standards for reporting and display of comprehensive income in the financial
statements. SFAS 130 is effective for fiscal years beginning after December 15,
1997. The Company plans to adopt SFAS 130 on October 1, 1998. The Company has
not yet evaluated the impact of SFAS 130.
 
     In February 1997, the FASB issued Statement of Financial Accounting
Standards No. 128, "Earnings per Share," which replaces the presentation of
primary earnings per share ("EPS") with basic EPS and replaces fully diluted EPS
with diluted EPS. It also requires dual presentation of basic and diluted EPS on
the face of the income statement for all entities with complex capital
structures and requires a reconciliation of the components of the basic EPS
computation to the components of the diluted EPS computation. SFAS No. 128 is
effective for both interim and annual periods ending after December 15, 1997.
Earlier adoption is not permitted. Upon adoption, all prior-period EPS data
presented will be restated. The Company does not anticipate the adoption of SFAS
No. 128 to have a significant effect on EPS.
 
     In October 1995, the FASB issued Statement of Financial Accounting
Standards No. 123, "Accounting for Stock-based Compensation." Companies are
required to adopt the provisions of this Statement for fiscal years beginning
after December 15, 1995. The Company has not yet adopted the new rules and, upon
adoption next year, presently intends to continue to measure compensation cost
using Accounting Principles Board Opinion No. 25, "Accounting for Stock Issued
to Employees."
 
                                       19
<PAGE>   21
 
                                    BUSINESS
 
COMPANY OVERVIEW
 
     The Company is a leading contract research organization providing research
and development resources to the worldwide pharmaceutical, medical device and
biotechnology industries. The Company offers an efficient, variable-cost
alternative to its clients' internal product development, compliance and quality
control programs. Founded in 1974, the Company initially focused primarily on
providing new products and procedures which facilitated research progress at
client sites. Recently, as a result of increasing pressures to bring products to
market on a cost-effective and accelerated basis, many clients have requested
the Company to carry out proprietary projects at the Company's facilities. As a
result, the Company now derives its revenues from both the sale of its
analytical instruments and other products as well as research services provided
to customers. The Company provides a broad array of both value-added products
and services focused on chemical analysis, allowing its clients to perform their
R&D functions either "in-house" or at the Company. The Company believes that
among CRO's that provide statistical, clinical, and medical services, the
Company is the only one that designs and sells analytical instrumentation.
Within the analytical instruments business, the Company believes that it is one
of very few firms to maintain a separate business unit devoted to contract
analytical services under the regulatory framework of GLP's and GMP's.
 
     The Company's products and services combine basic research with diagnostic
and therapeutic experience. One consequence of the restructuring of the
healthcare industry is the greater reliance on outsourcing research services for
both clinical trials and formulation development. The Company is capable of
supporting the analytical needs of researchers and clinicians, from small
molecule drugs and hormones through large biomolecules such as proteins. The
Company's scientists have the skills necessary in instrumentation, chemical
reagents and computer software to make the products and services it provides
increasingly valuable to the worldwide pharmaceutical, biotechnological and
medical device industries.
 
     Over the past five years, the Company has provided its products and/or
services to all of the top 25 pharmaceutical companies in the world, as ranked
by 1996 research and development spending. As a result of its (i) client focus,
(ii) reputation for high-quality services and products, (iii) capital investment
in state-of-the art instrumentation and facilities, (iv) skilled and experienced
professional staff, and (v) expertise in performing critical development and
support services, the Company believes that it is a value-added partner in
solving its clients' complex product development problems.
 
     The Company designs, manufactures and markets a broad range of products and
related scientific procedures that detect and quantify the presence of chemicals
in certain substances. On the products side, the Company competes in the $11
billion analytical instrument industry. The Company's focus, however, is not on
marketing hardware and software, but rather on solutions to challenging
analytical problems where the Company can utilize its talented personnel to
provide a total solution not generally available from hardware-focused
competitors. The Company's products utilize state-of-the-art scientific
technology, including liquid chromatography, electrochemistry and in vivo
sampling instrumentation. The Company's analytical instruments are sold
primarily to pharmaceutical firms and research organizations. Principal clients
include scientists engaged in drug metabolism studies, as well as scientists
engaged in basic neuroscience research.
 
     The Company provides a wide variety of services to pharmaceutical
companies, medical device manufacturers, medical research centers, academic
institutions and others. These analytical services support screening and
pharmacological testing, toxicology/safety testing, formulation development,
laboratory testing, regulatory and compliance consulting and quality control
testing. The Company began providing services primarily in response to requests
from customers who had used or were using the Company's products. To reduce
overhead and speed drug approval requests through the FDA, pharmaceutical
companies are contracting increasing amounts of their analytical work to outside
firms like the Company. The Pharmaceutical Research and Manufacturing
Association estimates that in 1997, pharmaceutical and biotechnology companies
will spend approximately $18.9 billion worldwide on research and development, of
which approximately 18%, or $3.4 billion, will be outsourced to independent
contract service providers. The Company believes that the trend of outsourcing
will continue as a result of drug development pressures, the
 
                                       20
<PAGE>   22
 
emphasis on cost containment, patent expirations, consolidation in the
pharmaceutical industry, virtual drug company and biotechnology industry growth,
the need for technical expertise, the need for data management expertise and the
globalization of the pharmaceutical marketplace.
 
CHANGING NATURE OF PHARMACEUTICAL INDUSTRY
 
     The Company provides products and services on a world wide basis to
pharmaceutical, medical device and biotechnology companies, academic
institutions and the United States government to facilitate the research and
development of drugs and medical devices. The Company's products are marketed
generally to both public and private research organizations engaged in the early
stages of drug development, while the Company's services are marketed generally
to pharmaceutical and other biotechnical companies engaged in later stages of
drug testing. The Company competes against several large equipment manufacturers
with respect to its products, while the research services industry is highly
fragmented consisting of several hundred service providers operating in various
segments of the market and a few larger companies focusing primarily on managing
clinical trials. While the markets for the Company's products and services have
distinct customers (often simply separate divisions in a large pharmaceutical
company) and requirements, the Company believes that both markets are facing
increased pressure to outsource certain facets of their research and development
activities. The Company believes that the factors identified below will
contribute to a continuing increase in outsourcing activities by its customers.
 
     Drug Development Pressure
 
     The pharmaceutical industry is under pressure to rapidly develop new drugs
to treat chronic illnesses and life threatening conditions such as AIDS and
Alzheimer's disease as consumers, doctors, health care providers and
pharmaceutical company shareholders continue to demand quicker and more
efficient drug development. Responding to this pressure, pharmaceutical
companies are attempting to accelerate the drug development process, including
reliance to an increasing extent on external providers of research and
development services to perform testing and analysis in all phases of the
process.
 
     Emphasis on Cost Containment
 
     Pharmaceutical companies are facing increasing pressure to develop more
efficient operating strategies as a result of margin pressure from market
forces, including (i) a shift toward managed care, (ii) patent expirations,
(iii) generic substitution, (iv) increased purchasing power of large buyer
groups and (v) governmental initiatives designed to reduce drug prices. The
Company believes that the pharmaceutical and medical device industries are
responding to these pressures by downsizing internal research and development
programs, favoring outsourcing as a variable-cost alternative. Further, the need
for additional capacity to increase the speed of new product development, to
maximize the period of marketing exclusivity and to increase economic returns,
has driven the need for outsourced services.
 
     Patent Expirations
 
     Patents on all major pharmaceuticals continue to age and expire. According
to the Pharmaceutical Research and Marketing Association, since 1984
prescriptions for generic drugs have risen from 20% to 43% of all prescriptions
written. Moving generic drugs onto the market faster can result in an estimated
2 to 5 year reduction in effective patent protection for brand name drugs.
Patent expirations are forcing drug companies to develop new products or modify
existing products to maintain market share against generic product competition.
The Company believes that the pressure to develop new products and modify
(reformulate) existing products, combined with internal capacity constraints, is
leading companies to outsource these activities.
 
     Consolidation in the Pharmaceutical Industry
 
     The pharmaceutical industry is increasingly consolidating as drug
development companies continue to pursue new avenues of growth and more
efficient ways of conducting business. As companies seek to combine
 
                                       21
<PAGE>   23
 
varied personnel, resources and activities, the Company believes that they will
increasingly focus on ways to reduce costs and streamline operations, leading to
the greater use of companies providing contract research services.
 
     Biotechnology Industry and "Virtual" Drug Company Growth
 
     The biotechnology industry has grown rapidly over the last 10 years and has
introduced a significant number of new compounds for development. As a result,
many biotechnology companies do not have the necessary in-house resources to
conduct required development and testing. Furthermore, the number of
pharmaceutical and medical device companies whose business strategy is to bring
a product far enough along to attract a strategic partner that will manufacture
and market a drug has increased. Many of these "virtual" drug development
companies, having little or no internal development or support resources, must
outsource a substantial portion of drug development and testing.
 
     Need for Technical Expertise
 
     The increasing complexity of new drugs requires high quality, innovative,
solution-driven contract work through all phases of the development process from
preclinical toxicology and pharmacokinetics through reformulation
pharmacokinetic studies and post-market clinical drug monitoring. The Company
believes that this need for specialized technical expertise will increasingly
lead to outsourcing of research activities.
 
     Need for Data Management Expertise
 
     Regulatory agencies are increasing the volume of data required for
regulatory filings, as well as requesting increased access to these data.
Furthermore, the FDA is encouraging the use of computer-assisted filings in an
effort to expedite the approval process; consequently, drug companies are
increasingly outsourcing to firms with automated data management capabilities.
Clients also are demanding access to data as it is acquired in the laboratory;
and the Company has the ability to provide clients with remote access to Company
computer systems while at the same time protecting client data from unauthorized
access.
 
     Globalization of the Marketplace
 
     Foreign pharmaceutical companies, particularly in Japan and Europe, are
increasingly seeking to obtain approval to market their products in the United
States. Due to a lack of familiarity with the complex United States regulatory
system and the difficulty in bringing their operating facilities into
FDA-required GMP compliance, foreign firms are relying on independent
development companies with experience in the United States to provide integrated
services through all phases of product development and to assist in preparing
regulatory submissions. The Company believes that domestic firms with
established regulatory expertise and a broad range of integrated development
services will benefit from this trend.
 
GROWTH STRATEGY
 
     The Company's objective is to be the leading provider of high-quality
analytical chemistry and support services to the worldwide pharmaceutical,
medical device and biotechnology industries. The Company intends to leverage its
personnel, facilities, technological expertise and information systems to
facilitate growth and differentiate itself from its competitors. The Company has
adopted a business strategy intended to accelerate growth and profitability,
which consists of the following elements:
 
     Increase Technical Staff to Expand Sales
 
     The Company believes its investment in infrastructure and technical
expertise has positioned it to significantly expand the level of services it
provides to current and future clients. The Company is currently turning away
opportunities to provide services because of technical personnel and capacity
constraints. The Company intends to hire additional scientific personnel,
allowing it to take advantage of the recent expansion of the Company's
facilities and substantially increased laboratory space. The additional
personnel will allow the Company to further provide services to current and
future clients.
 
                                       22
<PAGE>   24
 
     Implement Comprehensive Marketing and Sales Program
 
     Due to the recent growth of the CRO industry and the highly fragmented
nature of the competition, the Company believes it has been difficult for many
CRO's to achieve a high profile corporate identity within the marketplace. The
Company's marketing strategy is to continue to build upon its reputation as a
provider of high quality products and services. The Company has developed a
marketing plan designed to substantially increase awareness of the products
offered and services provided by the Company. The plan includes: (i) increasing
the number of sales and marketing personnel, (ii) expanding the level of
advertising and promotion, (iii) expanding strategic development relationships
with key clients, (iv) expanding global market presence through distributors and
locally focused promotion, and (v) surveying existing and potential clients to
further assess needs and buying practices. The Company also intends to expand
its technical services staff given that in the normal course of business of
responding to client inquiries regarding the Company's products and services
they have identified additional business opportunities in the services sector.
 
     Broaden Range of Services Provided
 
     The Company intends to expand its development capabilities by adding
services that are complimentary to its product development and support services.
In addition to offering a broad range of integrated, value-added services that
span the product life cycle from new compound characterizations to market
product compliance and quality control testing, the Company plans to: (i)
provide integrated formulations development services, (ii) refine current in
vitro sampling methodologies, and (iii) broaden the range of services provided
in connection with clinical trials. Increasing the array of services offered to
clients is intended to enhance the Company's reputation for providing a turnkey
approach to accurately and quickly meet product development challenges.
 
     Expand Geographically
 
     The Company intends to supplement its internal growth through the opening
of offices in strategic locations. The Company believes that these offices will
be valuable in developing and maintaining important client relationships. The
Company believes that establishing a presence in certain domestic and
international markets will enable it to more effectively compete for services
from worldwide pharmaceutical, medical device and biotechnology customers that
require a rapid turnaround. The Company intends to add facilities on the West
Coast, as well as in targeted international markets. Adding facilities outside
the United States will allow the Company to provide analytical services nearer
to clinical sites and major pharmaceutical research centers located in
international markets, without certain regulatory restrictions applicable to
delivery and testing of substances in the United States. Geographic expansion
may be accomplished by internal growth, acquisitions or joint ventures.
 
     Identify and Effect Key Acquisitions
 
     The Company believes that significant acquisition opportunities exist in
the CRO industry due to its highly fragmented nature. The Company intends to
focus on acquisitions of businesses that would expand its geographic presence,
add to its clinical expertise in sectors in which it has significant experience
and broaden its range of services. As part of its business strategy and in a
continuing effort to enhance its capabilities to serve the global needs of its
clients, the Company is looking at strategic acquisitions on an ongoing basis.
In addition to considering the business of the candidate, the Company evaluates
the ease with which an acquisition candidate may be integrated into the
Company's organizational structure.
 
OPERATING STRATEGIES
 
     The Company's operating strategies are derived from a strong base of
expertise in analytical chemistry, obtained from not only its role as a
manufacturer of state of the art instrumentation but also as a provider of
contract laboratory services. This dual role strongly differentiates the Company
from its competitors. The Company believes that among CRO's that provide
statistical, clinical, and medical services, the Company is the only one that
designs and sells analytical instrumentation. Within the analytical instruments
business, the
 
                                       23
<PAGE>   25
 
Company believes it is one of very few firms to maintain a separate business
unit devoted to contract analytical services under the regulatory framework of
GLP's and GMP's. The Company's operating strategies consist of the following
elements:
 
     Continue to Focus on Analytical Chemistry
 
     The Company will remain focused on selling products and services related to
analytical chemistry. The Company believes that this area has not been
emphasized by many of the larger CRO's and that they presently do not have the
personnel or the scientific expertise to be successful in this field. The
Company has developed and will continue to develop methodologies capable of
measuring new drug substances. The Company believes that its capabilities to
make highly technical measurements in blood plasma, tissue or dosage forms, for
example, represents a significant competitive advantage.
 
     Leverage the Synergy between Products and Services
 
     The Company will continue to provide analytical chemistry solutions by
selling innovative products and services. Each of these business units
complements and enhances the other. For example, the Company has received
certain contract service work due to the Company's expertise in selling and
supporting liquid chromatography products. Conversely, the timely completion of
a contracted study in the services unit has subsequently led to purchase orders
from the same clients for the Company's products.
 
     Further Emphasize High-End Assays
 
     The Company will continue to focus on performing sophisticated analytical
techniques, distinguishing the Company from entities performing commodity-like
services. Clients with a need for specialized, sophisticated, instrumental
techniques with extremely high sensitivity seek out highly qualified CRO's such
as the Company in order to maximize their likelihood of success. Many of the
newer compounds being developed are pharmacologically active at much lower
concentrations than before and require more sophisticated analytical techniques.
Due to the expertise of the Company's staff, and the sophisticated
instrumentation which it employs in its services contracts, the Company will
continue to take advantage of these high-end opportunities.
 
     Continue to Invest in State of the Art Instrumentation
 
     The Company has historically and will continue to invest in technologies
and products that are needed to support its customers' analytical chemistry
needs. The Company's stature in the contract services business and its ability
to distinguish itself from its competitors will be enhanced by (i) providing
more capacity through purchasing automated sample analysis systems (robotics),
(ii) increasing the number of LC/MS and GC/MS systems, (iii) increasing the
on-site storage space for stability samples, and (iv) adding other
instrument-based techniques.
 
     Enhance Client Relationships
 
     The Company prides itself on its strong relationships with its clients. The
Company believes that its continuous communication with clients both on the
product support side and throughout the testing process has been critical to its
success. The Company believes many clients view the Company's staff as a virtual
extension of their own department.
 
     Emphasize the "Annuity Effect"
 
     The Company will continue its close working relationships with large
innovator pharmaceutical companies by developing analytical methods for new drug
candidates as early as possible in the drug development process. Upon acceptance
of the new method by the client, the Company becomes the preferred provider of
the testing services and can leverage its development expenses over the analyses
of thousands of specimens generated from dozens of clinical trials and stability
testing protocols. The Company thereby generates a continuing revenue stream
extending over not only the drug development process but also over the
 
                                       24
<PAGE>   26
 
post-approval phase, where demand for testing services can actually increase as
reformulations occur and as other clients use the Company's method for drug
interaction studies.
 
THE COMPANY'S ROLE IN THE DRUG DEVELOPMENT PROCESS
 
     Overview of Process
 
     The Company has 23 years of experience in developing methodology to support
the analytical chemistry requirements of the drug discovery process. Under the
United States regulatory system, the development process for new pharmaceutical
products can be divided into three distinct phases. The preclinical phase
involves the discovery, characterization, product formulation and animal testing
necessary to prepare an Investigational New Drug ("IND") exemption for
submission to the FDA. The IND must be accepted by the FDA before the drug can
be tested in humans. The second, or clinical phase of development follows a
successful IND submission and involves the activities necessary to demonstrate
the safety, tolerability, efficacy and dosage of the substance in humans, as
well as the ability to produce the substance in accordance with the FDA's GMP
regulations. Data from these activities are compiled in a New Drug Application
("NDA"), or for biotechnology products, a Product License Application ("PLA"),
for submission to the FDA requesting approval to market the drug. The third
phase follows FDA approval of the NDA, or PLA, and involves the production and
continued analytical and clinical monitoring of the drug. The post-approval
phase also involves the development and regulatory approval of product
modifications and line extensions, including improved dosage forms.
 
     The drug development process may be illustrated schematically as set forth
below. Although the schematic is organized in a linear fashion, many of the
stages of the process frequently overlap.
 
                                   FLOW CHART

<TABLE>
<S><C>
    -------------      --------------      ------------------      --------------                           
   |             |    |  UNDERLYING  |    |      DRUG        |    |   IN VITRO   |                   
   |   GENETIC   |    | BIOCHEMISTRY |    |    DISCOVERY     |    |  AND IN VIVO |                   
   | INFORMATION |--->|  OF DISEASE  |--->|(LEAD GENERATION) |--->|  PRECLINICAL |-----------        
   |             |    |              |    |                  |    |   RESEARCH   |           |       
    -------------      --------------      ------------------      --------------            |       
- ---------------------------------------------------------------------------------------------        
|   -------------      --------------      -------------------      -------------                    
|  |             |IND |              |    |      REFINED      |    |             |NDA                
|  | PRELIMINARY |    |   PHASE I    |    |    FORMULATION    |    |   PHASE II  |                   
|  |FORMULATIONS |    |   TRIALS     |    |        AND        |    |    AND III  |                   
- -->| DEVELOPMENT |--->|(FIRST IN MAN)|--->|   MANUFACTURING   |--->|    TRIALS   |-----------        
   |             |    |              |    |(STABILITY TESTING)|    |             |           |       
    -------------      --------------      -------------------      -------------            |       
- ---------------------------------------------------------------------------------------------        
|   --------      -------------------      -------------------      ------------------               
|  |        |    |                   |    |       LINE        |    |     GENERIC      |              
|  |  FDA   |    |   MARKETING       |    |    EXTENSIONS     |    |   COMPETITION    |              
- -->|APPROVAL|--->| (QUALITY CONTROL) |--->| (NEW INDICATIONS) |--->| (BIO-EQUIVALENCE)|              
    --------      -------------------      -------------------      ------------------               

           --------                                                                                 
          |        |                                                                                
          |        |   Areas where the Company's products and services currently apply              
           --------                                                                                 
                                                                                                    
           --------                                                                                 
          |        |                                                                                
          |        |  Areas where the Company's technology is being explored                        
           --------                                                                                 


</TABLE>
                      
 
                                       25
<PAGE>   27
 
     Process Specifics and the Company's Role
 
     The Preclinical Phase. The development of a new pharmaceutical agent begins
with the discovery or synthesis of an array of new molecules which may influence
a specific target such as a membrane bound receptor or an enzyme involved in the
disease under study. These libraries of molecules are screened for
pharmacological activity using various in vitro and in vivo models, with the
goal of selecting relatively few "leads" for further development. Once the
pharmacologically active molecule is fully characterized, the agent is analyzed
to confirm the integrity and quality of material produced. Development of the
initial dosage forms to be used in clinical trials is completed, together with
analytical chemistry protocols to determine their stability. Upon successful
completion of preclinical safety and efficacy studies in animals, an IND
submission is prepared and provided to the FDA for review prior to human
clinical trials.
 
     Most of the Company's products are designed for use in the preclinical
phase of drug development, and the Company also provides its bioanalytical
services in this phase. A good example of the role of the Company's products in
the preclinical phase is the utilization of Company technology in the
development of drug substances impacting the central nervous system
neurotransmitters, including serotonin, dopamine, norepinephrine, and
acetylcholine. These drugs are used in the treatment of such conditions as
depression, Parkinson's disease, schizophrenia and Alzheimer's disease. The
Company's chromatography products have been used extensively, for example, to
study the influence of reuptake inhibitors on serotonin uptake and release in
CNS programs at universities and a major pharmaceutical company well before
1985. The Company believes that the synergy between the Company's
instrumentation products and services has been a factor in the Company being
selected by major pharmaceutical companies to determine new drug candidates in
thousands of Phase I-III clinical specimens.
 
     The Clinical Phase. Following successful submission of an IND application,
the sponsor is permitted to conduct Phase I human clinical trials in a limited
number of healthy individuals to determine the drug's safety and tolerability.
This work requires bioanalytical assays to determine the availability and
metabolism of the active ingredient following administration. Expertise in
method development and validation is essential for this phase, particularly with
new chemical entities. Phase II clinical trials involve administering the drug
to individuals who suffer from the target disease or condition to determine the
drug's potential effectiveness and ideal dose. When further safety (toxicology),
tolerability and an ideal dosing regimen have been established, Phase III
clinical trials involving large numbers of patients are conducted to verify
efficacy and safety. After the successful completion of Phase III clinical
trials, the sponsor of the new drug submits an NDA, or PLA, to the FDA
requesting that the product be approved for marketing.
 
     The Company's bioanalytical work is most intensive per individual in Phase
I studies where relatively few individuals are dosed. In Phase II and III the
number of individuals treated accelerates rapidly, but the number of blood
samples drawn per patient declines. Phase II and III studies are carried out
over several years with what has become a well established analytical protocol.
To maintain consistency in the analytical data, it is unusual for a sponsor to
change laboratories unless there are problems in the quality or timely delivery
of results. This tendency provides the "annuity effect" described previously.
 
     One area of special interest to the Company is drug interaction studies.
With increasing numbers of patients receiving multiple drug therapy, it is
critical that the impact of each drug be assessed with respect to its influence
on the effectiveness and toxicology of other drugs dosed simultaneously. This
complicates and often extends clinical trials. Frequently, drugs from different
manufacturers will be used together. A CRO such as the Company can provide
services to several firms simultaneously when a potential synergy exists between
their respective products. Such firms are often competitors in one therapeutic
area and complementors in another area (e.g. the "cocktail" approach to HIV
therapy). In such a case, a given assay technology might well be of interest to
a number of clients, spreading the assay development cost. More importantly,
drug interaction studies lead to new clients in a much more cost effective
manner than advertising or an outside sales force.
 
     The Post-approval Phase. Following approval, the drug manufacturer must
comply with quality assurance and quality control requirements throughout
production and must continue chemical analytical and stability studies of the
drug in commercial production to continue to validate production processes and
confirm
 
                                       26
<PAGE>   28
 
product shelf life. The drug manufacturer's raw materials must be analyzed prior
to use in production, and samples from each manufactured batch must be tested
prior to release of the batch for distribution to the public. The Company also
provides its bioanalytical services in all areas during the post-approval phase,
concentrating on bioequivalence studies of new formulations, line extensions,
new disease indications and drug interaction studies.
 
COMPANY PRODUCTS AND SERVICES
 
     Overview
 
     The Company's products and services may be illustrated schematically as set
forth below.
 
                                  
[A FLOW CHART SCHEMATIC OF THE COMPANY'S SERVICES AND PRODUCTS, INDICATING THE
   TECHNOLOGY INVOLVED IN THE SERVICES AND PRODUCTS WILL BE INSERTED HERE.]
 
     The Company provides products and procedures for the $11 billion analytical
instrument industry, and also provides a broad array of bioanalytical services
in all phases of the drug development process. Over its 23 year history, the
Company has developed expertise in a number of core scientific technologies
which it has utilized in developing state-of-the-art procedures designed to
determine amounts of chemical substances in complex materials. These
technologies include: liquid chromatography, electrochemistry, solid phase
extraction, mass spectrometry, enzymology and fluorescence. The Company also
uses its expertise in analytical chemistry to provide a wide range of
bioanalytical services to pharmaceutical companies, academic institutions and
others involved in pharmaceutical research and development.
 
     Products
 
     The Company designs, manufactures and markets a broad range of products and
related scientific procedures that detect and quantify the presence of chemicals
in certain substances. The Company's products utilize state-of-the-art
scientific technology including liquid chromatography, electrochemistry and in
vivo sampling instrumentation. Presently, the Company's products and procedures
include:
 
     - Bioanalytical separation instrumentation that utilizes liquid
       chromatography and Windows(R) software to detect low concentrations of
       substances in biological fluids and tissues.
 
     - A wide-range of chemical analyzers that utilize scientific technologies
       including electrochemistry, liquid chromatography and enzymology to
       analyze levels of chemicals such as acetylcholine, choline, serotonin and
       dopamine in biological materials. These instruments assist scientists in
       the study of, among other things, Alzheimer's disease, cocaine addiction
       and the effects of chemical warfare agents and strokes.
 
     - Diagnostic kits and procedures, designed to utilize the Company's
       instrumentation, that, among other things, enable clinical laboratories
       and pharmaceutical researchers to determine the presence of
 
                                       27
<PAGE>   29
 
multiple drugs in blood plasma and to measure neurotransmitters and their
metabolites in plasma and urine. These kits and procedures assist researchers in
developing new drugs for diseases such as AIDS and cardiovascular disease.
 
     - A line of miniaturized in vivo sampling devices, marketed to veterinary
       and animal research centers, pharmaceutical companies and medical
       research centers, which assist in the study of a number of medical
       conditions, including stroke, depression, Parkinson's disease, diabetes
       and osteoporosis.
 
     The chart below sets forth the Company's product categories, the technology
supporting each category and the applications of each category.
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------------
PRODUCT/PROCEDURE                   ENABLING TECHNOLOGY                 APPLICATION(S)
- --------------------------------------------------------------------------------------------------------
<S>                                 <C>                                 <C>
Bioanalytical Separation            - Liquid chromatography             Determining low concentrations
  Instrumentation                   - High pressure digitally           of substances in biological
                                    controlled                          fluids and tissues
                                        metering pumps
                                    - Electrochemical and optical
                                        detectors
                                    - Customized Windows(R) software
                                    - Customized Internet
                                    applications
- --------------------------------------------------------------------------------------------------------
Electrochemical Analyzers and       - Electrochemistry                  Development of biosensors for
  Accessories                       - Real time control and data        substances, such as glucose,
                                        acquisition software            lactate, glutamate; development
                                    - Customized Windows(R) software    of batteries for electronics
                                    - Customized Internet               such as pacemakers; study of
                                    applications                        corrosion of implants
- --------------------------------------------------------------------------------------------------------
Acetylcholine/Choline Analyzer      - Liquid chromatography             Studies of Alzheimer's disease;
                                    - Enzymology                        chemical warfare agents; and
                                    - Electrochemistry                  infant formula
- --------------------------------------------------------------------------------------------------------
Serotonin and Dopamine Analyzer     - Liquid chromatography             Developing serotonin reuptake
                                    - Electrochemistry                  inhibitors; studies of the
                                                                        mechanism of cocaine addiction
- --------------------------------------------------------------------------------------------------------
Amino Acid Analyzer                 - Derivatization chemistry          Studies of aspartame, glutamate,
                                    - Liquid chromatography             and GABA in the brain; research
                                    - Electrochemistry and/or           to minimize the impact of stroke
                                    - Fluorescence                      and other ischemic events in the
                                                                        brain
- --------------------------------------------------------------------------------------------------------
In vivo sampling devices            - Hydrophilic membrane fibers       Following pharmacokinetics in
  ("artificial blood vessels")      - Digitally controlled pumping      vivo; monitoring glucose;
  and auxiliary instrumentation         systems, miniature fraction     neurotransmitters, peptides, and
                                        collectors, and valves          amino acids; studies of stroke,
                                                                        depression, Parkinson's Disease,
                                                                        diabetes and calcium loss
                                                                        related to osteoporosis and
                                                                        weightlessness; reducing the use
                                                                        of animals in research
- --------------------------------------------------------------------------------------------------------
Kits for clinical measurement of    - Robotics                          Evaluating cardiovascular
  neurotransmitters and             - Liquid chromatography             disease, inborn errors of
  homocysteine in human blood       - Electrochemistry                  metabolism, and cancers of
  and urine                         - Customized Windows(R) software    neurological origin
- --------------------------------------------------------------------------------------------------------
Simultaneous determination of       - Robotics                          Cocktail therapy for AIDS; drug
  multiple drugs in blood plasma    - Solid phase extraction            interaction studies during
                                    - Liquid chromatography             clinical trials
                                    - Mass spectrometry
- --------------------------------------------------------------------------------------------------------
Vital signs monitoring              - Electrocardiology (ECG)           ECG, respiration, blood
                                    - Temperature transducers           pressure, and temperature
                                    - Real time software                monitoring in veterinary clinics
                                                                        and toxicology departments in
                                                                        pharmaceutical companies
- --------------------------------------------------------------------------------------------------------
</TABLE>
 
                                       28
<PAGE>   30
 
     Services
 
     The Company provides a wide variety of services to pharmaceutical
companies, medical device manufacturers, medical and research centers, academic
institutions, and others. The Company's services unit has grown rapidly over the
last several years. The Company began providing services primarily in response
to requests from customers who had used or were using the Company's products. As
the Company's reputation has grown, the Company's customers increasingly have
drawn on the Company's expertise in analytical chemistry to solve complex
problems which arise in the course of drug research and development. The
Company's range of services now include: method development and validation;
product characterization; stability testing; bioanalytical testing; diagnostic
testing and in vivo sampling. The Company is poised to utilize its expertise to
provide a greater volume and broader array of services. These services involve
the application of the Company's expertise in analytical chemistry to a broad
range of challenging and complex issues, and include the services described
below.
 
     - Method Development and Validation. The Company develops and validates
       methods used in a broad range of laboratory testing necessary to
       determine physical or chemical characteristics of compounds and finished
       dosage forms. Analytical methods are developed to demonstrate potency,
       purity, stability or physical attributes. These methods are validated to
       ensure that the data generated are accurate, precise, reproducible and
       reliable and are used throughout the drug development process and in
       product support testing. Of the Company's 155 employees as of September
       30, 1997, more than 30 of the Company's scientists (including nine who
       hold Ph.D. degrees) are experienced with method development and
       validation.
 
     - Product Characterization. The Company has the expertise and instruments
       required to identify and characterize a broad range of chemical entities.
       Characterization analysis identifies the chemical composition, structure
       and physical properties of a compound, and characterization data forms a
       significant portion of a regulatory application. The Company uses
       numerous techniques to characterize the compound, including
       chromatography, spectroscopy, electrochemistry and other physical
       chemistry techniques. Once appropriate test methods are developed and
       validated, and appropriate reference standards (highly pure samples) are
       characterized and certified, the Company can assist clients by routinely
       testing compounds for clinical and commercial use.
 
     - Stability Testing. The Company provides stability testing and secure
       storage facilities necessary to establish and confirm product purity,
       potency and other shelf-life characteristics. Stability testing is
       required at all phases of product development, from dosage form
       development through commercial production, to confirm shelf life of each
       manufactured batch. The Company maintains a four-chamber, ICH validated
       controlled climate GMP facility. FDA regulations require that samples of
       clinical and commercial products placed in stability chambers be analyzed
       in a timely fashion after scheduled "pull points" occur, based on the
       date of manufacture.
 
     - Bioanalytical Testing. The Company offers bioanalytical testing services
       to support clinical trials, analyzing plasma samples to characterize the
       drug's concentration and determine the rate of absorption and
       elimination. Bioanalytical studies of new drugs often present challenging
       and complex issues, with products being metabolized into multiple active
       and inactive forms. The Company works with its clients to develop and
       validate analytical methods to permit detection and measurement of the
       various components to trace levels. In some cases clients expect the
       Company to take responsibility to develop methodology and in other cases
       methodology is transferred from the client and refined and validated by
       the Company personnel. The most common technology used in such studies is
       liquid chromatography coupled with various detectors, including mass
       spectrometry as well as optical and electrochemical devices.
 
     - Diagnostic Testing. The Company has manufactured bioanalytical chemistry
       products since its start in 1974. The Company produces fully automated,
       networkable state-of-the-art liquid chromatographs and electrochemical
       analyzers based on Windows(R)software. The Company has recently developed
       and now produces a line of diagnostic kits designed to fit its
       instrumentation. These kits help measure neurotransmitters and their
       metabolites and homocysteine, an experimental cardiovascular disease
 
                                       29
<PAGE>   31
 
       indicator in plasma and urine. These measurement processes are
       often performed by Company personnel utilizing Company products.
 
     - In Vivo Sampling. The Company pioneered and has commercialized
       miniaturized in vivo sampling methodology, which involves the continuous
       monitoring of chemical changes in live animals. This technology is sold
       as both a service and a line of products. The Company is aggressively
       adding new components to this line, with the goal of selling complete,
       automated sampling systems. Target markets include veterinary and animal
       research centers, pharmaceutical companies and medical research centers.
       The Company has received two significant Phase II SBIR grants that
       involve subcontracts with Purdue University and the University of Kansas
       for the purpose of exploiting this emerging technology.
 
     - Formulation Development Services. In the future, the Company plans to
       provide integrated formulation development services, enabling the Company
       to take a client's compound and develop a safe and stable product with
       desired characteristics. The Company believes its strong academic
       connections to Purdue and other universities, formulation expertise and
       extensive analytical capabilities position the Company to provide a
       significant contribution to this area.
 
CLIENTS
 
     Over the past five years, the Company has provided services and products to
all of the top 25 pharmaceutical companies in the world as ranked by 1996
research and development spending. In addition, the Company products are
purchased by the vast majority of medical schools in North America, Europe and
Asia. In 1996, the Company provided products and services to approximately 300
institutions, including some of the largest United States, European and Japanese
drug companies. Approximately 40% of the Company's revenues are generated from
customers located outside the United States.
 
     The Company believes that a concentration of business among certain large
clients is not uncommon in the CRO industry. The Company has experienced such
concentration in the past and may do so again in the future. During 1996, four
operating groups (Quality Control, Analytical Research and Development, Clinical
Pharmacokinetics, and Drug Metabolism) of Pfizer, Inc., a major United States
pharmaceutical company, in the aggregate accounted for approximately 18% of the
Company's total revenues. These sales were derived from both the products and
the services units of the Company. During the first nine months of 1997, Pfizer,
Inc. accounted for approximately 21% of the Company's total revenues. Most of
these sales fell under approximately 80 contracts the Company has or had with
Pfizer, Inc., the largest of which totaled approximately $398,000. Although the
Company strives to reduce its reliance on a limited number of major clients,
there can be no assurance that the Company's business will not be dependent upon
certain major clients, the loss of which could have a material adverse effect on
the Company. In addition, due to the project-oriented nature of the Company's
business, there can be no assurance that significant clients in any one period
will continue to be significant clients in other periods. See "Risk
Factors -- Dependence on Certain Industries and Clients."
 
SALES AND MARKETING
 
     Marketing and sales initiatives have been created to address both market
needs and economic reality. Services have grown primarily through direct,
internal recommendations among major pharmaceutical manufacturers. Frequently,
these customers have had prior relationships with the Company's staff and
positive experiences with the Company's products and services. The Company
recognizes that its growth and continued customer satisfaction are dependent
upon its ability to continually improve its sales and marketing functions.
 
     In North America, products are sold directly to the end user. The Company
has approximately 20 personnel selling a range of products and an equal number
providing technical and development support. All staff members are technically
trained and all function in both capacities. The Company has also established a
highly professional collection of catalogs, training and technical support
literature, workshops, and academic publications. The Company's peer-reviewed
journal, Current Separations, describes independent research in
 
                                       30
<PAGE>   32
 
technologies of interest to the Company's customers, and is distributed to
18,500 readers worldwide, many of whom are current or potential customers.
 
     Product sales, marketing and technical support is led from the Company's
main office in West Lafayette, Indiana. The Company maintains an office in New
Jersey with a small sales and technical staff, enabling the Company to
demonstrate its products and present technical workshops near the largest
concentration of key customers. The Company also maintains sales and technical
support capabilities in Massachusetts, North Carolina, Texas, Pennsylvania and
Kansas.
 
     The Company's marketing plan provides for new sales representation in
California and the Midwest, stronger promotion of all product lines, enhanced
workshops, training, and demonstration capabilities in the Company's new
facilities. The Company's marketing and sales strategy is to be more aggressive,
focus on customer needs and further strengthen communications with its markets.
The Company will build on its long history of innovation and technical
excellence.
 
     BAS Technicol, Ltd., a wholly-owned subsidiary of the Company, manages most
sales in Europe, and the Company maintains sales and technical support
capabilities in Belgium. The Company has a network of more than 20 established
distributors covering Japan, the Pacific Basin, South America, the Middle East,
India, South Africa and Eastern Europe. Revenue generated from the Company's
Japanese distributor, BAS Japan, accounted for approximately 19% of the
Company's total revenue for fiscal 1996. Although the Company believes that it
could identify a suitable replacement in the event that BAS Japan discontinues
as the Company's distributor, such an event could have a material adverse effect
on the Company's business, operations and financial condition. See Note 9 of
Notes to Consolidated Financial Statements. All of these distributor
relationships are managed from the Company's headquarters. International growth
is planned through acquisitions, stronger local promotion and significantly
broadening the Company's distributor network.
 
CONTRACTUAL ARRANGEMENTS
 
     The Company's service contracts typically establish an estimated fee for
identified services. While the Company is performing a contract, clients often
adjust the scope of services to be provided by the Company in light of interim
project results, at which time the amount of fees is adjusted accordingly.
Generally, the Company's fee-for-service contracts are terminable by the client
upon written notice of 30 days or less. The loss of a large contract or the loss
of multiple contracts could adversely affect the Company's future revenue and
profitability. Contracts may be terminated for a variety of reasons, including
the client's decision to forego a particular study, the failure of product
prototypes to satisfy safety requirements and unexpected or undesired results of
product testing. See "Risk Factors -- Nature of Contracts" and "-- Dependence on
Certain Industries and Clients."
 
BACKLOG
 
     Backlog for the Company's products consist of booked purchase orders for
products which have not been shipped. The Company rarely has a backlog for its
products of more than one month of sales. Many products are shipped within 24
hours of order receipt. Due to the nature of the Company's services, the Company
does not believe that backlog is a meaningful indicator of the future
performance of its services unit.
 
COMPETITION
 
     With respect to its products, the Company competes with several large
equipment manufacturers, including Hewlett Packard, Waters Corporation and
Perkin Elmer Corporation. Competitive factors include quality, reliability and
price. The Company believes it competes favorably in its targeted markets
because of its ability to combine quality products with technical assistance and
services to meet customer needs.
 
     With respect to its services, the Company competes primarily with in-house
research, development, quality control and other support service departments of
pharmaceutical and biotechnology companies, as well as university research
laboratories and teaching hospitals. In addition, there are numerous
full-service CRO's
 
                                       31

<PAGE>   33
 
that compete in this industry. The largest CRO competitors offering similar
research services include Covance, Inc., Pharmaceutical Product Development,
Inc., Applied Analytical Industries, Inc., Phoenix International Life Sciences
Inc. and MDS Health Group Ltd. CROs generally compete on the basis of previous
experience, medical and scientific expertise in specific therapeutic areas, the
quality of contract research, the ability to organize and manage large-scale
trials on a global basis, medical database management capabilities, the ability
to provide statistical and regulatory services, the ability to recruit
investigators, the ability to integrate information technology with systems to
improve the efficiency of contract research, an international presence with
strategically located facilities, financial viability and price.
 
     Many of the Company's competitors are much larger and have significantly
greater financial resources than the Company. See "Risk Factors -- Competition."
 
GOVERNMENT REGULATION
 
     The services performed by the Company are subject to various regulatory
requirements designed to ensure the quality and integrity of pharmaceutical and
diagnostic products, primarily under the Federal Food, Drug and Cosmetic Act and
associated GLP and GMP regulations which are administered by the FDA in
accordance with current industry standards. These regulations apply to all
phases of manufacturing, testing and record keeping, including personnel,
facilities, equipment, control of materials, processes and laboratories,
packaging, labeling and distribution. Noncompliance with GLPs and GMPs by the
Company in a project could result in disqualification of data collected by the
Company in the project. Material violation of GLP or GMP requirements could
result in additional regulatory sanctions, and in severe cases could result in a
discontinuance of selected Company operations, which would have a material
adverse effect on the Company's business, financial condition and results of
operations.
 
     To help assure compliance with applicable regulations, the Company has
established quality assurance controls at its facilities that monitor ongoing
compliance by auditing test data and regularly inspecting facilities, procedures
and other GMP compliance parameters. In addition, FDA regulations and guidelines
serve as a basis for the Company's standard operating procedures, where
applicable. Certain of the Company's development and testing activities are
subject to the Controlled Substances Act, administered by the Drug Enforcement
Agency ("DEA"), which regulates strictly all narcotic and habit-forming
substances. The Company maintains restricted-access facilities and heightened
control procedures for projects involving such substances due to the level of
security and other controls required by the DEA. In addition to FDA regulations,
the Company is subject to other federal and state regulations concerning such
matters as occupational safety and health and protection of the environment.
 
     The Company's activities involve the controlled use of hazardous materials
and chemicals. The Company is subject to foreign, federal, state and local laws
and regulations governing the use, storage, handling and disposal of such
materials and certain waste products. The risk of accidental contamination or
injury from these materials cannot be completely eliminated. In the event of
such an accident, the Company could be held liable for any damages that result
which could have a material adverse effect on the Company's business and results
of operations. See "Risk Factors -- Dependence on and Effect of Government
Regulation."
 
PRODUCT LIABILITY AND INSURANCE
 
     The Company maintains product liability and professional errors and
omissions liability insurance, providing approximately $6.0 million in coverage
on a claims-made basis. In addition, in certain circumstances the Company seeks
to manage its liability risk through contractual provisions with clients
requiring the Company to be indemnified by the client or covered by clients'
product liability insurance policies. In addition, in certain types of
engagements, the Company seeks to limit contractual liability to its clients to
the amount of fees received by the Company. The contractual arrangements are
subject to negotiation with clients and the terms and scope of such
indemnification, liability limitation and insurance coverage vary from client to
client and from project to project. Although most of the Company's clients are
large, well-capitalized companies, the financial performance of these
indemnities is not secured. Therefore,the Company bears the risk that the
indemnifying party may not have the financial ability to fulfill its
indemnification obligations or that liability
 
                                       32
<PAGE>   34
 
would exceed the amount of applicable insurance. In addition, the Company could
be held liable for errors and omissions in connection with the services it
performs. There can be no assurance that the Company's insurance coverage will
be adequate or that insurance coverage will continue to be available on terms
acceptable to the Company, or that the Company can obtain indemnification
arrangements or otherwise be able to limit its liability risk. See "Risk
Factors -- Liability Risks Related to Products and the Provision of Services."
 
EMPLOYEES
 
     At June 30, 1997, the Company had 155 full-time employees, 110 of which
hold degrees, including 29 Ph.D.s. The Company believes that its relations with
its employees are good. None of the Company's employees are represented by a
union. The Company's performance depends on its ability to attract and retain
qualified professional, scientific and technical staff. The level of competition
among employers for skilled personnel is high. The Company believes that its
employee benefit plans enhance employee morale, professional commitment and work
productivity and provide an incentive for employees to remain with the Company.
While the Company has not experienced any significant problems in attracting or
retaining qualified staff, there can be no assurance that the Company will be
able to avoid these problems in the future. All employees enter into
confidentiality agreements intended to protect the Company's proprietary
information. See "Risk Factors -- Need to Attract, Develop, Manage and Retain
Professional Staff."
 
FACILITIES
 
     The Company's principal executive offices are located at 2701 Kent Avenue,
West Lafayette, IN 47906 constituting approximately 100,000 square feet of
operational and administrative space. Purdue University, located in West
Lafayette, Indiana, is exceptionally strong in pharmacy, chemistry, veterinary
medicine, computer science and engineering. Its program in Analytical Chemistry
is ranked among the best in the nation. The Purdue campus provides access to
educational opportunities, high quality consultants, graduates and information
resources. The technically trained staff that the Company requires prefers a
community with the amenities of a first rate university. The Company's record
for obtaining Federal and other grants has enhanced collaborative efforts with
Purdue. The Company maintains offices which provide sales and technical support
services in New Jersey, Pennsylvania and the United Kingdom, and employs sales
and technical support service representatives in North Carolina, Texas and
Belgium. The Company believes that its facilities are adequate for the Company's
operations and that suitable additional space will be available when needed.
 
INFORMATION SYSTEMS
 
     Although the Company's focus is on providing value-added products and
services, information systems are an important component of the Company's
technological leadership. The Company believes that superior information systems
are essential to expanding its operations and to providing innovative services
to clients. The Company's customized Windows(R)-based software is integral to
many of its products.
 
     The FDA has become increasingly sophisticated with respect to information
systems and the integrity of all forms of data incorporated into regulatory
submissions. Correspondingly, the Company strives to be at the forefront of
nonclinical testing laboratories in validation of hardware and software systems.
The Company's continuing commitment to technological innovations and meeting
changing client and regulatory requirements will drive continuous improvement of
its information systems technology, maintaining a competitive advantage.
 
LEGAL PROCEEDINGS
 
     The Company from time to time may be involved in various claims and legal
proceedings arising in the ordinary course of business. The Company does not
believe that any pending claims or proceedings, individually or in the
aggregate, would have a material adverse effect on the Company's financial
condition or results of operations.
 
                                       33
<PAGE>   35
 
                                   MANAGEMENT
 
EXECUTIVE OFFICERS AND DIRECTORS
 
     The executive officers and directors of the Company and their ages as of
June 30, 1997 are as follows:
 
<TABLE>
<CAPTION>
                 NAME                      AGE                          POSITION
                 ----                      ---                          --------
<S>                                        <C>    <C>
Peter T. Kissinger, Ph.D.(1)(2)........    52     Chairman of the Board; President; Chief Executive
                                                  Officer
Ronald E. Shoup, Ph.D.(2)..............    45     President, Research Services Unit; Vice President,
                                                  Research and Development; Director
Craig S. Bruntlett, Ph.D...............    48     Vice President, Electrochemical Products
Donnie A. Evans........................    51     Vice President, Engineering
Stephen Geary, Ph.D....................    55     Vice President, United States Sales and Marketing
Candice B. Kissinger...................    45     Vice President, International Marketing; Secretary
                                                  and Director
Lina L. Reeves-Kerner..................    46     Vice President, Human Resources
Michael P. Silvon, Ph.D................    50     Vice President, Business Development
Denise M. Wallworth, Ph.D..............    44     Managing Director, BAS Technicol, Ltd.
Douglas P. Wieten......................    35     Chief Financial Officer, Controller and Treasurer
William E. Baitinger(2)(3).............    64     Director
Michael K. Campbell(3).................    46     Director
Thomas A. Hiatt(1).....................    49     Director
John A. Kraeutler(1)(2)................    49     Director
William C. Mulligan(1)(3)..............    43     Director
W. Leigh Thompson(2)...................    59     Director
</TABLE>
 
- -------------------------
(1) Member of the Compensation and Incentive Stock Option Committee.
 
(2) Member of the Executive Committee.
 
(3) Member of the Audit Committee.
 
     PETER T. KISSINGER, PH.D. founded the Company in 1974 and has served as its
Chairman, President and Chief Executive Officer since 1974. He is also a
part-time Professor of Chemistry at Purdue University where he has been teaching
since 1975. Dr. Kissinger has a Bachelor of Science degree in Analytical
Chemistry from Union College and a Doctorate in Analytical Chemistry from the
University of North Carolina.
 
     RONALD E. SHOUP, PH.D. has been Vice President, Research and Development
since 1983 and President of the Company's research services unit, BAS Analytics,
since 1990. Dr. Shoup has been instrumental in developing many of the Company's
chromatographic applications. Dr. Shoup has a Bachelor of Science degree in
Chemistry and Mathematics, and a Ph.D. in Analytical Chemistry from Purdue
University.
 
     CRAIG S. BRUNTLETT, PH.D. has been Vice President, Electrochemical Products
since 1992 and is responsible for sales, marketing and development of the
Company's electrochemical products. From 1980 to 1990, Dr. Bruntlett was
Director of New Product Development for the Company. Dr. Bruntlett has a
Bachelor of Arts degree in Chemistry and Mathematics from St. Cloud State
University in Minnesota and a Ph.D. in Chemistry from Purdue University.
 
     DONNIE A. EVANS was the Company's first full-time employee beginning as an
electronics engineer in 1978. Since January of 1988, he has been Vice President,
Engineering Services.
 
     STEPHEN GEARY, PH.D. has been Vice President, United States Sales and
Marketing since January 1992. Dr. Geary is responsible for the sales efforts of
the Company's clinical products. Dr. Geary has a Bachelor of Science degree in
Biology and Chemistry from Tufts University, a Masters of Science degree in
Biology from the University of New Hampshire and a Ph.D. in Biochemistry from
Syracuse University.
 
     CANDICE B. KISSINGER has been Vice President, International Sales and
Marketing since July 1981. Mrs. Kissinger developed the Company's international
distribution network and is responsible for managing the Company's advertising
activities. Mrs. Kissinger has a Bachelor of Science degree in Microbiology from
 
                                       34
<PAGE>   36
 
Ohio Wesleyan University and a Masters of Science degree in Microbiology from
the University of Massachusetts. Mrs. Kissinger is the wife of Dr. Peter T.
Kissinger.
 
     LINA L. REEVES-KERNER has been Vice President, Human Resources since 1995
and is responsible for the administrative support functions of the Company,
including shareholder relations, human resources and community relations. From
1980 to 1990 Ms. Reeves-Kerner served as an Administrative Assistant at the
Company. Ms. Reeves-Kerner has a Bachelor of Science degree in Business
Administration from Indiana Wesleyan University.
 
     MICHAEL P. SILVON, PH.D. has been Vice President, Business Development
since March 1997. From August 1996 until January 1997, Dr. Silvon was Manager,
Technical Services for Great Lakes Chemical responsible for commercial technical
support. From December 1994 until August 1996, Dr. Silvon was a self-employed
consultant advising various companies on technical business management. From
October 1993 until December 1994, Dr. Silvon was Vice President Sales and
Marketing at Hi-Port, Inc., a custom formulations and packaging firm in Houston,
Texas. Prior to that period, Dr. Silvon was a Regional Business Manager-Americas
for the Fine Chemicals Business of Imperial Chemical Industries, PLC/Zeneca,
responsible for outsourcing the needs of many major pharmaceutical companies
with key raw materials. Dr. Silvon has his Bachelor in Science degree in
Chemistry from Loyola University of Chicago, a Ph.D. in Chemistry from the
University of Vermont and a Masters in Business Administration from Sacred Heart
University.
 
     DENISE M. WALLWORTH has been Managing Director, BAS Technicol, Ltd. since
March 1995 and is responsible for the Company's operations in the United
Kingdom. Prior to that time she was Managing Director of Technicol Ltd., which
was acquired by the Company in March 1995. Dr. Wallworth has a Bachelor of
Science degree in Chemistry and a Doctorate in Organic Chemistry from the
University of Manchester Institute of Science Technology.
 
     DOUGLAS P. WIETEN has been Chief Financial Officer since September 1997,
corporate Controller since February 1992 and Treasurer since March 1997 and is a
certified public accountant. Prior to that time, Mr. Wieten worked at Ernst &
Whinney (now Ernst & Young LLP), where he had been employed since 1984. Mr.
Wieten has a Bachelor of Science degree in Accounting from Butler University.
 
     WILLIAM E. BAITINGER has served as a director of the Company since 1979.
Mr. Baitinger has been Director of Technology Transfer at Purdue University
since 1988, responsible for all aspects of the program. Mr. Baitinger has a
Bachelor of Science degree in Chemistry and Physics from Marietta College and a
Doctorate in Chemistry from Purdue University.
 
     MICHAEL K. CAMPBELL has served as a director of the Company since 1991. Mr.
Campbell has been the President and Chief Executive Officer of Powerway, Inc., a
software company, since January 1993. From January 1992 until January 1993, Mr.
Campbell was Chief Financial Officer of Hurco Companies, Inc. and was president
of Hurco Manufacturing, its largest division. Mr. Campbell has a Bachelor of
Science degree in accounting from the University of Southern Indiana.
 
     THOMAS A. HIATT has served as a director of the Company since 1991. Mr.
Hiatt has been general partner of Middlewest Ventures, a venture capital firm,
since 1986. Mr. Hiatt has a Bachelor of Arts degree in Political Science from
Wabash College and a Master of Science degree in Management from the
Massachusetts Institute of Technology. Mr. Hiatt is also a director of Fifth
Third Bank of Central Indiana, Isolab, Inc., PackageNet, Inc. and Powerway, Inc.
 
     JOHN A. KRAEUTLER has served as a director of the Company since January
1997. Mr. Kraeutler has been President and Chief Operating Officer of Meridian
Diagnostics, Inc. since August 1992 and is also a director. Prior to that time,
Mr. Kraeutler was Executive Vice President and Chief Operating Officer of
Meridian Diagnostics, Inc. Mr. Kraeutler has a Bachelor of Science degree in
Biology from Fairleigh Dickinson University and a Masters of Science degree in
Biology and a Masters in Business Administration from Seton Hall University.
 
     WILLIAM C. MULLIGAN has served as a director of the Company since 1991. Mr.
Mulligan has been the managing director of Primus Venture Partners, a venture
capital firm, since January 1992. Mr. Mulligan has a
 
                                       35
<PAGE>   37
 
Bachelor of Arts degree in Economics from Denison University and a Masters in
Business Administration from the University of Chicago. Mr. Mulligan is also a
director of Universal Electronics.
 
     W. LEIGH THOMPSON has served as a director of the Company since January
1997. Since 1995, Dr. Thompson has been the chief executive officer of Profound
Quality Resources, Inc., a world-wide scientific consulting firm. Prior to 1995,
Dr. Thompson held various positions at Lilly Resource Laboratories. Dr. Thompson
has a Bachelor of Science degree in Biology from the College of Charleston, a
Masters of Science and a Doctorate in Pharmacology from the Medical University
of South Carolina and a Medical Doctor degree from The Johns Hopkins University.
Dr. Thompson is also a director of Chrysalis International Corporation, Corvas
International, Inc., GeneMedicine, Inc., La Jolla Pharmaceutical Company,
Medarex, Inc., Ophidian Pharmaceuticals, Inc. and Orphan Medical, Inc.
 
     All directors are elected at the annual meeting of shareholders for a term
of one year and hold office until the election and qualification of their
successors at the next annual meeting of shareholders or until their earlier
resignation or removal. Officers of the Company serve at the discretion of the
Board of Directors.
 
DIRECTOR COMMITTEES
 
     The Board of Directors has established an Audit Committee, a Compensation
and Incentive Stock Option Committee (the "Compensation Committee") and an
Executive Committee. The Audit Committee is responsible for recommending to the
Board of Directors the engagement of the independent auditors of the Company and
reviewing with the independent auditors the scope and results of the audits, the
internal accounting controls of the Company, and audit practices. Messrs.
Baitinger, Campbell and Mulligan serve on the Audit Committee. The Compensation
Committee is responsible for reviewing and approving all compensation
arrangements for the officers of the Company and for administering the Company's
Option Plans. See "Management -- Option Plans." Messrs. Kissinger, Hiatt,
Kraeutler and Mulligan serve on the Compensation and Incentive Stock Option
Committee. The Executive Committee may exercise all of the authority of the
Board of Directors, subject to certain limitations with respect to payment of
dividends, filling of vacancies on the Board, amendment of the Articles of
Incorporation or Bylaws, and issuance of shares. Messrs. Kissinger, Shoup,
Baitinger, Kraeutler and Thompson serve on the Executive Committee.
 
DIRECTOR COMPENSATION
 
     Directors who are not employees of the Company, other than Messrs. Hiatt
and Mulligan, receive $500 for each Board meeting attended, plus out-of-pocket
expenses incurred in connection with attendance at such meetings. Dr. Thompson
receives an additional $6,000 annually as compensation for the services he
renders as a consultant to the Company. See "Management -- Scientific Advisory
Board." Directors who are employees of the Company do not receive any additional
compensation for their services as directors.
 
SCIENTIFIC ADVISORY BOARD
 
     In 1985, the Company established a Scientific Advisory Board to assist the
Company in its research and development activities. The Scientific Advisory
Board is comprised of distinguished scientists from outside the Company who have
significant accomplishments in areas of science and technology that are
important to the Company's future. The Scientific Advisory Board interacts with
the Company's scientific and management staff. The following individuals are the
current members of the Scientific Advisory Board:
 
     DANIEL W. ARMSTRONG, PH.D. is the Curators' Distinguished Professor of
Chemistry at the University of Missouri-Rolla. He is the Editor for Chirality;
Section Editor for Amino Acids; on the Advisory Board for Analytical Chemistry;
and is on the Editorial Board of several other journals. He is the founder and
first director of the Center for Environmental Science and Technology. He is on
the Board of Directors of Advanced Separation Technologies, has six patents and
approximately 250 publications. He received his Ph.D. in Chemistry from Texas
A&M University in 1977.
 
     R. GRAHAM COOKS, PH.D., is Henry Bohn Hass Distinguished Professor of
Chemistry at Purdue University. He received his Bachelor of Science degree at
the University of Natal, South Africa, in 1959; his
 
                                       36
<PAGE>   38
 
Masters of Science and his Doctorate from the above in 1963 and 1966,
respectively, and his Doctorate from Cambridge University in Great Britain in
1976. Prof. Cooks currently serves on the editorial boards of ten scientific
journals. He has been honored with Purdue Cancer Research Award (1983), ACS
Analytical Divisions 1984 Chemical Instrumentation Award, Thomson Medal for
International Service to Mass Spectrometry (1985), Herbert McCoy Award (1990),
NSF Special Creativity Award (1990 & 1995), ACS award for Mass Spectrometry
(1991), and ACS Award for Analytical Chemistry (1997). He has published more
than 500 scientific papers since 1967.
 
     WILLIAM R. HEINEMAN, PH.D., is Distinguished Research Professor in the
Department of Chemistry at the University of Cincinnati where he has served on
the faculty since 1972. He received his Doctorate in Chemistry from the
University of North Carolina in 1968. Dr. Heineman has served on the
editorial/advisory boards of Analytical Chemistry, The Analyst, Selective
Electrode Reviews, Encyclopedia of Analytical Science, Fresenius Journal of
Analytical Chemistry, Quimica Analitica, Biosensors and Bioelectronics,
Analytica Chimica Acta, Applied Biochemistry and Biotechnology, and Analytical
Letters. He has received numerous awards including the Alexander von Humboldt
Senior Research Award for U.S. Scientists, the Charles N. Reilley Award in
Electroanalytical Chemistry, and the Division of Analytical Chemistry Award for
Excellence in Teaching from the University of Cincinnati. He is the Chair of the
Division of Analytical Chemistry of the American Chemical Society and a
cofounder and President of the Society for Electroanalytical Chemistry.
 
     JEAN-MICHEL KAUFFMAN, PH.D., is Professor of Analytical Chemistry at the
Pharmaceutical Institute, University of Brussels (ULB). He received his
undergraduate degree in Pharmacy and his Doctorate in Pharmaceutical Sciences
from ULB in 1977 and 1983, respectively. Dr. Kauffman is Vice President of the
Belgian Society of Pharmaceutical Sciences and Treasurer of the International
Bioelectrochemical Society. He is Editor in Chief of the journal Talanta and
serves on five other editorial boards. Dr. Kauffinan's research focuses on
pharmaceutical analysis, biosensors, and electrochemical measurement techniques.
He has published 19 review chapters and 105 scientific journal articles.
 
     SUSAN M. LUNTE, PH.D., is Associate Professor of Pharmaceutical Chemistry
and Courtesy Associate Professor of Chemistry at the University of Kansas. She
received her Doctorate in Analytical Chemistry in 1984 from Purdue University.
She was a research scientist at Procter & Gamble, Cincinnati, OH from 1984 until
1987 when she went to the University of Kansas. Dr. Lunte has been associated
with the Center for Bioanalytical Research (CBAR) at the University of Kansas
since 1987 and served as Associate Director and Director of that center from
1994 to early 1997. Dr. Lunte serves on the editorial advisory boards of
Analytical Proceedings and Pharmaceutical Research and in 1997 was the recipient
of the Agnes Fay Morgan Research Award for Women in Chemistry from Iota Sigma
Pi, an NSF CAREER Award, and the University of Kansas Graduate Student Mentoring
Award. She is currently chair-elect of the Analytical and Pharmaceutical Quality
section of the American Association of Pharmaceutical Scientists and will serve
as chair next year.
 
     MARK E. MEYERHOFF, PH.D. is Professor of Chemistry and Associate Chair for
Graduate Affairs in the Department of Chemistry at the University of Michigan.
He has active research programs in the areas of electrochemical sensor design,
novel immunoassay systems, and new stationary phases for liquid chromatography.
He received his Doctorate from the State University of New York at Buffalo in
1979. Since joining the faculty at Michigan, he and his collaborators have
authored more than 170 original research papers. Professor Meyerhoff serves on
the editorial/advisory boards of Biosensors & Bioelectronics; Electroanalysis;
Analytica Chimica Acta, and Applied Biochemistry and Biotechnology. He also
serves on Scientific Advisory Boards for Medtronics Blood Management,
Instrumentation Laboratory Sensor Systems, Magnequench International, GDS
Technologies, and Selective Technologies.
 
     W. LEIGH THOMPSON, M.S., PH.D., M.D., is retired from Eli Lilly and Company
where he served as Director of Clinical Investigation, Executive Vice President
of Lilly Research Laboratories and Chief Scientific Officer. Prior to joining
Eli Lilly in 1982, Dr. Thompson served as a Professor of Medicine at Case
Western University from 1974 until 1982, where he founded programs in clinical
pharmacology and critical care medicine. He directed live telecasts for
continuing education, developed the Northeast Ohio Poison Control Center,
Cleveland Drug Analysis Laboratory, and University Hospitals Drug Information
Center. As an Assistant Professor of Medicine and of Pharmaceutical and
Experimental Therapeutics at John Hopkins,
 
                                       37
<PAGE>   39
 
Dr. Thompson started the advanced nurse practitioner program and initiated
computer-assisted instruction in pharmacokinetics. He is an honorary Life Member
and Past President of the Society of Critical Care Medicine and is co-editor of
the Textbook of Critical Care and Critical Care: State of the Art.
 
     Each of the Scientific Advisory Board members is employed by an employer
other than the Company and may have commitments to, or consulting or advisory
contracts with, other entities that may conflict or compete with his or her
obligations with the Company. Generally, members of the Scientific Advisory
Board are not expected to devote a substantial portion of their time to Company
matters.
 
     The members of the Scientific Advisory Board do not receive any
compensation in connection with attending meetings of the Scientific Advisory
Board. They do, however, from time to time, receive compensation in connection
with consulting services they render to the Company.
 
EXECUTIVE COMPENSATION
 
                           SUMMARY COMPENSATION TABLE
 
     The following table sets forth the compensation provided by the Company to,
or for the account of, the Chief Executive Officer of the Company for the years
ended September 30, 1994, 1995 and 1996. No other executive officer of the
Company had annual compensation exceeding $100,000.
 
<TABLE>
<CAPTION>
                                                         ANNUAL COMPENSATION
                                                   -------------------------------      ALL OTHER
         NAME AND PRINCIPAL POSITION(S)            FISCAL YEAR   SALARY     BONUS    COMPENSATION(1)
         ------------------------------            -----------   ------     -----    ---------------
<S>                                                <C>           <C>       <C>       <C>
Peter T. Kissinger, Ph.D.........................     1996       $85,000   $ 4,250       $26,788
  Chairman of the Board; President                    1995       $85,000   $21,250       $26,134
  and Chief Executive Officer                         1994       $85,000   $17,000       $25,697
</TABLE>
 
- -------------------------
(1) Includes $21,365 of premiums paid on a life insurance policy on the lives of
    Dr. Kissinger and Mrs. Kissinger, the beneficiary of which is a trust
    established for their benefit, and contributions to the Company's 401(k)
    plan on Dr. Kissinger's behalf.
 
INCENTIVE PLAN
 
     The Company has an incentive plan for its executive officers, the purpose
of which is to strengthen the financial condition of the Company by providing an
incentive bonus to its executive officers based upon the Company's pre-tax net
income. If the Company's pre-tax net income, calculated before the payment of
any bonuses, exceeds $500,000, each executive officer receives a bonus equal to
5% of his or her annual salary. If the Company's pre-tax net income, calculated
before the payment of any bonuses, exceeds $750,000, $1 million or $1.25
million, each executive officer will receive a bonus equal to 15%, 20% or 25%,
respectively, of his or her annual salary. In fiscal 1996, each executive
officer received a bonus equal to 5% of his or her annual salary.
 
OPTION PLANS
 
     A total of 95,000 Common Shares have been reserved for issuance under the
Company's 1997 Employee Option Plan adopted                , 1997, of which
options to purchase an aggregate of        Common Shares have been granted at an
exercise price equal to the public offering price set forth on the cover page of
this Prospectus. In addition, at the date of this Prospectus options to purchase
a total of 250,097 Common Shares were outstanding under the 1990 Employee Option
Plan at a weighted average exercise price of $1.27 per share, and 27,086 Common
Shares were outstanding under a Director Option Plan, at an exercise price of
$0.66 per share. No further options may be granted under the 1990 Employee
Option Plan or the Director Option Plan.
 
     The 1990 and 1997 Employee Option Plans (the "Employee Plans") are
administered by the Compensation Committee. Members of the Compensation
Committee are not eligible to participate in the Employee Plans while serving on
the Compensation Committee. Participants in the Employee Plans are key
 
                                       38
<PAGE>   40
 
employees of the Company and its subsidiaries as may be selected from time to
time by the Compensation Committee. Subject to the terms of the Employee Plans,
the Compensation Committee is authorized to determine the number of Common
Shares subject to each option granted thereunder, the time and conditions of
exercise of such option and all other terms and conditions of such option.
 
     Options granted under the Employee Plans are incentive stock options, as
defined by Section 422A of the Internal Revenue Code of 1986, as amended (the
"Code"). The per share exercise price of an option will be not less than 100% of
the fair market value of the Common Shares on the date of the grant, except that
the per share exercise price of options granted to holders of 10.0% or more of
the total combined voting power of all outstanding classes of shares of the
Company ("10% Shareholders") will be not less than 110.0% of such fair market
value. In addition, for each participant, the maximum aggregate fair market
value on the date of grant of all Common Shares subject to options first
exercisable in any one year may not exceed $100,000.
 
     Options will expire on a date determined by the Compensation or Option
Committee, as the case may be, provided that the options will expire not more
than ten years from the date of grant (five years in the case of options issued
to 10% Shareholders). If an option holder retires with the consent of the
Company or becomes permanently and totally disabled, options granted under the
Employee Plans will expire 90 days and 120 days, respectively, after the
termination of employment. If an option holder's service with the Company is
terminated as a result of death, the options will expire one year after such
event. Options are not transferable other than by will or the laws of descent
and distribution.
 
     Options vest in four equal installments on the second, third, fourth and
fifth anniversary of the date of grant. If the Company is a party to any merger
or consolidation, the Company has the right to terminate any outstanding option
upon 30 days written notice to the option holder; however, if the merger or
consolidation is not consummated within 180 days from the date of such notice,
all options terminated shall be deemed to have been continuously in effect. If
the Company is dissolved or liquidated, the Company shall give each option
holder 30 days written notice and all unexercised options shall be deemed to be
terminated upon such dissolution or liquidation.
 
     The following table sets forth certain information concerning exercisable
and unexercisable options held by the Chief Executive Officer at September 30,
1997.
 
                  AGGREGATED OPTION EXERCISES IN LAST YEAR AND
                         FISCAL YEAR-END OPTION VALUES
 
<TABLE>
<CAPTION>
                                                          NUMBER OF               VALUE OF UNEXERCISED
                                                    SECURITIES UNDERLYING             IN-THE-MONEY
                                                   UNEXERCISED OPTIONS AT              OPTIONS AT
                                                     SEPTEMBER 30, 1997           SEPTEMBER 30, 1997(1)
                                                 ---------------------------   ---------------------------
                                                 EXERCISABLE   UNEXERCISABLE   EXERCISABLE   UNEXERCISABLE
                                                 -----------   -------------   -----------   -------------
<S>                                              <C>           <C>             <C>           <C>
Peter T. Kissinger, Ph.D.......................    40,630         13,543        $334,385      $  111,459
</TABLE>
 
- -------------------------
(1) Calculated on the basis of on assumed initial public offering price of
    $10.00 per share, the mid-point of the range set forth on the cover page of
    this Prospectus, less $1.77, the per share exercise price.
 
     The Company has reserved 5,000 Common Shares for issuance to non-employee
members of its Board of Directors in the future, on terms to be determined at
the time of the grant. The exercise price of an option will be at least the fair
market value of the Common Shares on the date of the grant.
 
401(K) SAVINGS PLAN
 
     The Company has a defined contribution retirement plan (the "401(k) Plan"),
qualified under Sections 401(a) and 401(k) of the Code. All employees of the
Company are eligible to enroll in the 401(k) Plan on the first April 1 or
October 1 after completing one year of employment with the Company. The 401(k)
Plan provides that the Company will contribute 2% of each eligible employee's
compensation to the 401(k) Plan. In addition, each participant may contribute
from 1% to 10% or none of their annual compensation. The Company may also make
discretionary contributions based on a certain percentage of a
 
                                       39
<PAGE>   41
 
participant's contributions under the 401(k) Plan, as determined by the Board of
Directors. The Board of Directors approved a matching contribution of 35%
beginning October 1, 1996. The Company made contributions under the 401(k) Plan
totaling approximately $153,630 for the year ended September 30, 1996.
 
LIMITATION OF LIABILITY AND INDEMNIFICATION MATTERS
 
     As permitted by the Indiana Business Corporation Law (the "BCL"), the
Second Restated Articles of Incorporation of the Company (the "Articles")
require the Company to indemnify its officers and directors from liabilities to
the extent allowed by the BCL. The BCL provides that a corporation may indemnify
its officers and directors, if the officer or director acted in good faith and
in a manner he reasonably believed, in the case of conduct in his official
capacity, was in the best interests of the Company and, in all other cases, was
not opposed to the best interests of the Company, and, with respect to any
criminal proceeding, the officer or director had reasonable cause to believe his
conduct was lawful or no reasonable cause to believe his conduct was unlawful.
The BCL further provides that the Company may advance to its officers and
directors expenses incurred in connection with proceedings against them for
which they may be indemnified, if the Company receives a written affirmation
from such officer or director that in his good faith belief he met the standard
of conduct described above and that he will repay all advanced expenses if it is
ultimately determined that he did not meet that standard of conduct. Pursuant to
the BCL, the Company may obtain directors' and officers' insurance. At present,
the Company is not aware of any pending or threatened litigation or proceeding
involving an officer, director, employee or agent of the Company in which
indemnification would be required or permitted.
 
     The Company maintains directors' and officers' liability insurance with
respect to certain risks to which the Company and its directors and officers are
exposed.
 
COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
 
     Peter T. Kissinger, Thomas Hiatt, John Kraeutler and William Mulligan
served on the Compensation Committee during fiscal 1996. Dr. Kissinger, the
President and Chief Executive Officer of the Company, currently is a member of
the Compensation Committee; however, he does not participate in decisions
regarding his compensation. None of the Company's executive officers serves as a
director of, or in any compensation related capacity for, companies with which
members of the Compensation Committee are affiliated.
 
                                       40
<PAGE>   42
 
                              CERTAIN TRANSACTIONS
 
     In 1991 Primus Capital Fund II, LP ("Primus") and Middlewest Ventures II,
LP ("Middlewest") purchased Redeemable Preferred Shares and Convertible
Preferred Shares of the Company. The Redeemable Preferred Shares carried an 8%
cumulative dividend, and were redeemed in accordance with their terms for an
amount equal to their purchase price in equal installments on December 31, 1995,
June 30, 1996 and December 31, 1996. See Note 6 of Notes to Consolidated
Financial Statements. The Convertible Preferred Shares were purchased for an
aggregate of $1,231,000 and will be converted into an aggregate of 752,399
Common Shares immediately prior to the issuance of the Shares offered hereby, of
which 470,250 shares and 282,149 shares are owned by Primus and Middlewest,
respectively. The Venture Funds continue to have certain rights to cause the
Company to register the Common Shares owned by the Venture Funds under the
Securities Act for sale to the public. See "Description of Capital Stock --
Registration Rights." Additionally, the Company has agreed to use its best
efforts to cause one representative from each Venture Fund to be elected to the
Company's Board of Directors as long as the respective Venture Fund owns more
than 5% of the Company's outstanding Common Shares. All other covenants between
the Company and the Venture Funds will be terminated in connection with the
conversion of the Convertible Preferred Shares to Common Shares.
 
                                       41
<PAGE>   43
 
                             PRINCIPAL SHAREHOLDERS
 
     The following table sets forth certain information regarding beneficial
ownership of the Common Shares as of August 31, 1997 by (i) each person who is
known by the Company to own beneficially more than 5% of the outstanding Common
Shares, (ii) each director of the Company, (iii) the Chief Executive Officer,
and (iv) all directors and executive officers of the Company as a group.
 
<TABLE>
<CAPTION>
                                                            SHARES BENEFICIALLY     SHARES BENEFICIALLY
                                                               OWNED PRIOR TO           OWNED AFTER
                                                               OFFERING(1)(2)          OFFERING(1)(2)
                                                            --------------------    --------------------
                          NAME                               NUMBER      PERCENT     NUMBER      PERCENT
                          ----                               ------      -------     ------      -------
<S>                                                         <C>          <C>        <C>          <C>
Primus Capital Fund II, L.P. ...........................      470,250     15.7%       470,250     10.5%
Middlewest Ventures II, L.P. ...........................      282,149      9.4%       282,149      6.3%
Peter T. Kissinger(3)...................................    1,261,099     42.0%     1,261,099     28.0%
Ronald E. Shoup(4)......................................       89,453      3.0%        89,453      1.9%
Candice B. Kissinger(5).................................    1,261,099     42.0%     1,261,099     28.0%
William E. Baitinger(6).................................      137,734      4.6%       137,734      3.1%
Michael K. Campbell(7)..................................       27,086         *        27,086         *
Thomas A. Hiatt(8)......................................      282,149      9.4%       282,149      6.3%
John A. Kraeutler.......................................           --        --            --        --
William C. Mulligan(9)..................................      470,250     15.7%       470,250     10.5%
W. Leigh Thompson.......................................           --        --            --        --
All executive officers and directors as a group.........    2,513,138     83.8%     2,513,138     55.8%
</TABLE>
 
- -------------------------
 *  Less than 1% of outstanding Common Shares.
 
(1) Unless otherwise noted, all addresses are in care of Company at 2701 Kent
    Avenue, West Lafayette, Indiana 47906.
 
(2) Except as indicated in the footnotes to this table and pursuant to
    applicable community property laws, the Company believes that the persons
    named in the table have sole voting and investment power with respect to all
    Common Shares.
 
(3) Includes (i) 247,795 Common Shares beneficially owned by Candice B.
    Kissinger, the wife of Dr. Kissinger, including 13,543 Common Shares
    issuable upon the exercise of options granted to Mrs. Kissinger under the
    Employee Option Plan which are exercisable within 60 days of September 26,
    1997; (ii) 595,904 Common Shares owned jointly by Dr. and Mrs. Kissinger;
    and (iii) 40,630 Common Shares issuable upon the exercise of outstanding
    options granted to Dr. Kissinger under the Employee Option Plan which are
    exercisable within 60 days of September 26, 1997.
 
(4) Includes (i) 68,686 Common Shares owned jointly by Dr. Shoup and his wife
    and (ii) 20,315 Common Shares beneficially owned by Dr. Shoup issuable upon
    the exercise of options under the Employee Option Plan exercisable within 60
    days of September 26, 1997.
 
(5) Includes 417,400 Common Shares beneficially owned by Peter T. Kissinger,
    including 40,630 Common Shares issuable upon the exercise of options granted
    to Dr. Kissinger under the Employee Option Plan exercisable within 60 days
    of September 26, 1997; (ii) 595,904 Common Shares owned jointly by Dr. and
    Mrs. Kissinger; and (iii) 13,543 Common Shares beneficially owned by Mrs.
    Kissinger issuable upon the exercise of options under the Employee Option
    Plan exercisable within 60 days of September 26, 1997.
 
(6) Includes 53,089 Common Shares owned jointly by Dr. Baitinger and his wife.
 
(7) Includes 27,086 Common Shares issuable upon the exercise of outstanding
    options granted to Mr. Campbell under the Director Option Plan which are
    exercisable within 60 days of September 26, 1997.
 
(8) Mr. Hiatt is a general partner of Middlewest Management Company, L.P., which
    is the general partner of Middlewest Ventures II, L.P., and accordingly may
    be attributed beneficial ownership of the Common Shares owned by Middlewest
    Ventures II, L.P. The other general partner of Middlewest Management
    Company, L.P. is Marcey Shockey. Mr. Hiatt disclaims beneficial ownership of
    the Common Shares
 
                                       42
<PAGE>   44
 
    beyond his ownership interest in Middlewest Management Company, L.P. Mr.
    Hiatt serves as a Director of the Company as a nominee of Middlewest
    Ventures II, L.P. The address of Middlewest Ventures II, L.P. is 201 N.
    Illinois, Suite 300, Indianapolis, Indiana 46204.
 
(9) Mr. Mulligan is a general partner of Primus Venture Partners Limited
    Partnership, which, together with Primus Advisors, Inc., is the general
    partner of Primus Management II. Primus Management II is the general partner
    of Primus Capital Fund II, L.P. Accordingly, Mr. Mulligan may be attributed
    beneficial ownership of the Common Shares owned by Primus Capital Fund II,
    L.P. The other general partners of Primus Venture Partners Limited
    Partnership are James T. Bartlett, Jonathan E. Dick, Kevin J. McGinly and
    Loyal W. Wilson. Mr. Mulligan disclaims beneficial ownership of the Common
    Shares beyond his ownership interest in Primus Venture Partners Limited
    Partnership. Mr. Mulligan serves as a Director of the Company as a nominee
    of Primus Capital Fund II, L.P. The address of Primus Capital Fund II, L.P.
    is 1375 E. Ninth Street, Suite 2700, Cleveland, Ohio 44114.
 
                            DESCRIPTION OF CAPITAL STOCK
 
     Upon the closing of this offering, the authorized capital stock of the
Company will consist of 19 million Common Shares, and one million preferred
shares (the "Preferred Shares") none of which will be outstanding. As of August
31, 1997, there were 2,247,601 Common Shares issued and outstanding held of
record by 63 shareholders and the Company had outstanding options to purchase a
total of 277,184 Common Shares.
 
     The following summary of certain provisions of the Common Shares and
Preferred Shares does not purport to be complete and is subject to, and
qualified in its entirety by, the provisions of the Articles of Incorporation,
which are included as an exhibit to the Registration Statement on Form S-1
(including all schedules, exhibits and amendments thereto, the "Registration
Statement"), and by the provisions of applicable law.
 
COMMON SHARES
 
     Upon the completion of this offering, the Company's Articles of
Incorporation will authorize the issuance of up to 19 million Common Shares.
Holders of Common Shares are entitled to one vote for each Common Share held on
all matters submitted to a vote of shareholders and do not have cumulative
voting rights. Accordingly, holders of a majority of the Common Shares entitled
to vote in any election of directors may elect all of the directors standing for
election. Holders of Common Shares are entitled to receive ratably such
dividends, if any, as may be declared by the Company's Board of Directors out of
funds legally available therefor and subject to any preferential dividend rights
of any then outstanding Preferred Shares. Upon the liquidation, dissolution or
winding up of the Company, the holders of Common Shares are entitled to receive
ratably the net assets of the Company available after the payment of all debts
and other liabilities and subject to any preferential dividend rights of any
then outstanding Preferred Shares. Holders of Common Shares have no preemptive,
subscription, redemption or conversion rights. The outstanding Common Shares
are, and the Shares offered by the Company in this offering will be, when issued
and paid for, fully paid and nonassessable.
 
PREFERRED SHARES
 
     The Board of Directors is authorized, subject to any limitations prescribed
by Indiana law, to provide for the issuance of Preferred Shares in one or more
series, to establish from time to time the number of shares to be included in
each such series, to fix the powers, designations, preferences and rights of the
shares of each wholly unissued series and any qualifications, limitations or
restrictions thereon and to increase or decrease the number of shares of any
such series (but not below the number of shares of such series then outstanding)
without any further vote or action by the shareholders. The Board of Directors
may authorize the issuance of Preferred Shares with voting or conversion rights
that could adversely affect the voting power or other rights of the holders of
Common Shares. The issuance of Preferred Shares could have the effect of
decreasing the market price of the Shares. The issuance of Preferred Shares may
have the effect of delaying, deferring or
 
                                       43
<PAGE>   45
 
preventing a change in control of the Company. The Company has no current plan
to issue any Preferred Shares.
 
REGISTRATION RIGHTS
 
     Upon the completion of this offering, the Venture Funds will have certain
rights with respect to the registration of under the Securities Act an aggregate
of 752,399 Common Shares held by them. If requested by the Venture Funds, the
Company must file a registration statement under the Securities Act covering all
Common Shares requested to be included by the Venture Funds within 60 days. The
Venture Funds may make an unlimited number of requests for registration;
provided, however, that the Company is only required to bear the expense of one
registration. The Company has the right to delay any registration for up to 90
days under certain circumstances.
 
     In addition, if the Company proposes to register any of its Common Shares
under the Securities Act other than in connection with a Company employee
benefit plan or a corporate reorganization, the Venture Funds may require the
Company to include all or a portion of their shares in that registration,
subject to certain priorities among them, although the managing underwriter of
any such offering may limit the number of Common Shares to be offered by the
Venture Funds.
 
CERTAIN PROVISIONS OF INDIANA LAW
 
     As an Indiana corporation, the Company is governed by the provisions of the
BCL.
 
     Voting Requirements for Certain Business Combinations. Chapter 43 of the
BCL establishes a five-year period beginning with the acquisition of 10% of the
voting power of the outstanding voting shares of a "resident domestic
corporation" (which definition includes the Company) during which certain
business transactions involving the acquiring shareholder are prohibited unless,
prior to the acquisition of such interest, the board of directors approves the
acquisition of such interest or the proposed business combination. After the
five-year period expires, a business combination involving the acquiring
shareholder may take place only upon approval by a majority of the disinterested
shares, or if the other shareholder receive a formula price based on the higher
of the highest price paid by the acquiring shareholder or at the time of the
announcement of the proposed transaction, whichever is higher. The minimum price
for shares other than common shares is to be determined under criteria similar
to that for common shares, except the minimum price as defined cannot be less
than the highest preferential amount to which the shares are entitled in the
event of any liquidation, dissolution or winding up of the corporation.
 
     Changes of Control. Under Chapter 42 of the BCL, with certain exceptions, a
person proposing to acquire or acquiring voting shares of an "issuing public
corporation" (which definition includes only corporations having at least 100
shareholders and in which more than 10% of its shareholders are Indiana
residents, 10% of its shares are owned by Indiana residents, or which have
10,000 or more shareholders who are Indiana residents) sufficient to entitle
that person to exercise voting power within any of the ranges of one-fifth to
one-third of all voting power, more than one-third but less than one-half of all
voting power, or a majority or more of all voting power (a "control share
acquisition") may give a notice of such fact to the corporation containing
certain specified data. The acquiring person may request that the directors call
a special meeting of shareholders for the purpose of considering the voting
rights to be accorded the shares so acquired ("control shares"), and the control
shares have voting rights only to the extent granted by a resolution approved by
the shareholders. The resolution must be approved by a majority of the votes
entitled to be cast by each voting group entitled to vote separately on the
proposal, excluding shares held by the acquiring person and shares held by
management. Control shares as to which the required notice has not been filed
and any control shares not accorded full voting rights by the shareholders may
be redeemed at fair market value by the corporation if it is authorized to do so
by its articles of incorporation or bylaws before a control share acquisition
has occurred. The Company has not adopted such a provision in its Articles or
Bylaws. Shareholders are entitled to dissenters rights with respect to the
control share acquisition in the event that the control shares are accorded full
voting rights and the acquiring person has acquired control shares with a
majority of all voting power.
 
                                       44
<PAGE>   46
 
     Other Provisions of the BCL. The BCL specifically authorizes directors, in
considering the best interest of a corporation, to consider both the long- and
short-term interests of the corporation, as well as the effects of any action on
shareholders, employees, suppliers and customers of the corporation, and
communities in which offices or other facilities of the corporation are located
and any other factors the directors consider pertinent. Under the BCL, directors
are not required to approve a proposed business combination or other corporate
action if they determine in good faith that the action is not in the best
interest of the corporation. In addition, the BCL states that directors are not
required to redeem any rights under or render inapplicable a shareholder rights
plan or to take or decline to take any other action solely because of the effect
such action or inaction might have on a proposed change of control of the
corporation or the amounts to be paid to shareholders upon such a change of
control. The Delaware Supreme Court has held that defensive measures in response
to a potential takeover must be "reasonable in relation to the threat posed."
The BCL explicitly provides that the different or higher degree of scrutiny
imposed in Delaware and certain other jurisdictions upon director actions taken
in response to potential changes in control will not apply.
 
     The BCL requires directors to discharge their duties, based on the facts
then known to them, in good faith, with the care an ordinary, prudent person in
a like position would exercise under similar circumstances and in a manner the
director reasonably believes to be in the best interest of the corporation. A
director is not liable for any action taken as a director or for failure to take
any action unless the director has breached or failed to perform the duties of
the director's office in compliance with the foregoing standard and the breach
or failure to perform constitutes willful misconduct or recklessness.
 
TRANSFER AGENT AND REGISTRAR
 
     The Transfer Agent and Registrar for the Shares is
               . Its telephone number is (   )    -     .
 
                        SHARES ELIGIBLE FOR FUTURE SALE
 
     Upon the closing of this offering, the Company will have outstanding an
aggregate of 4,500,000 Common Shares. Of these Common Shares, all the Shares
sold in this offering be freely tradeable without restrictions or further
registration under the Securities Act of 1933, as amended (the "Securities
Act"), and approximately 600,000 Common Shares owned by existing shareholders
will be eligible for sale pursuant to Rule 144(k) under the Securities Act. All
of the Company's officers and directors and certain of the Company's
shareholders have agreed with the Underwriters that, for a period of 180 days
after the date of this Prospectus, subject to certain exceptions, they will not
directly or indirectly offer, sell, contract to sell, pledge, grant any option
to purchase, establish an open "put equivalent position" within the meaning of
Rule 16a-1(h) under the Securities Exchange Act of 1934, as amended (the
"Exchange Act"), or otherwise dispose of or grant any rights with respect to any
Common Shares (or any securities convertible into, exchangeable for or
exercisable for Common Shares), without the prior written consent of the
Underwriters (the "Lock-Up Agreements"). In its sole discretion and at any time
without notice, the Underwriters may release all or any portion of the Common
Shares subject to the Lock-Up Agreements.
 
     Following the expiration of the 180-day lock-up period, or earlier with the
written consent of the Underwriters, 2,334,592 Common Shares will be eligible
for sale by existing shareholders of the Company subject to the volume and other
limitations of Rule 144, as discussed below.
 
     In general, under Rule 144 any holder of restricted securities, as defined
under Rule 144, including an affiliate of the Company, as to which at least one
year has elapsed since the later of the date of acquisition of the Common Shares
from the Company or an affiliate, would be entitled beginning 90 days after the
date of this Prospectus, to sell within any three-month period a number of
Common Shares that does not exceed the greater of 1% of the then outstanding
Common Shares (approximately 45,000 shares upon the completion of this offering)
or the average weekly trading volume of the Common Shares on the Nasdaq National
Market during the four calendar weeks preceding the date on which notice of the
sale is filed with the Commission. Sales under Rule 144 are subject to certain
requirements relating to manner of sale, notice and availability of current
public information about the Company. However, a person (or persons whose Common
Shares are
 
                                       45
<PAGE>   47
 
aggregated) who is not deemed to have been an affiliate of the Company at any
time during the 90 days immediately preceding the sale and who beneficially
owned the Common Shares for at least two years since the later of the date the
Common Shares were acquired from the Company or an affiliate of the Company may
sell those shares under Rule 144(k) without regard to the limitations described
above. The foregoing is a summary of Rule 144 and is not intended to be a
complete description of it.
 
     As of June 30, 1997, there were 277,184 Common Shares subject to
outstanding options issued pursuant to the Company's Option Plans, of which
approximately 234,297 Common Shares were vested as of that date. The Company
intends to file a registration statement under the Securities Act to register
Common Shares reserved for issuance under the Option Plans, thereby permitting
the sale of those Common Shares by non-affiliates in the public market without
restriction under the Securities Act. That registration statement will become
effective immediately upon filing.
 
     Subject to certain limitations on the aggregate offering price of a
transaction and other conditions, Rule 701 may be relied upon with respect to
the resale of securities originally purchased from the Company by its employees,
directors, officers, consultants or advisers prior to the closing of this
offering pursuant to written compensatory benefit plans or written contracts
relating to the compensation of such persons. In addition, the Commission has
indicated that Rule 701 will apply to options granted by the Company before this
offering, along with the Common Shares acquired upon exercise of such options.
Securities issued in reliance on Rule 701 are deemed to be Restricted Shares
and, subject to the contractual limitations described above, beginning 90 days
after the date of this Prospectus, may be sold by persons other than affiliates
subject only to the manner of sale provisions of Rule 144 and by affiliates
under Rule 144 without compliance with its one-year minimum holding period
requirements. See "Risk Factors -- Shares Eligible for Future Sale; Registration
Rights."
 
                                       46
<PAGE>   48
 
                                  UNDERWRITING
 
     Subject to the terms and conditions contained in the Underwriting
Agreement, each of the underwriters named below (the "Underwriters") has
severally agreed to purchase, and the Company has agreed to sell to such
Underwriter, the respective number of Shares set forth opposite the name of such
Underwriter:
 
<TABLE>
<CAPTION>
                                                               NUMBER OF
                            NAME                                 SHARES
                            ----                               ---------
<S>                                                           <C>
Roney & Co., L.L.C. ........................................
The Ohio Company............................................
 
                                                              ------------
     Total..................................................
                                                              ============
</TABLE>
 
     The Underwriting Agreement provides that the obligations of the several
Underwriters to pay for and accept delivery of the Shares offered hereby are
subject to approval of certain legal matters by their counsel and to certain
other conditions. The Underwriters are obligated to take and pay for all Shares
offered hereby (other than those covered by the over-allotment option described
below) if any such shares are purchased.
 
     The Underwriters, for whom Roney & Co., L.L.C. and The Ohio Company are
acting as representatives (the "Representatives"), propose to offer part of the
Shares directly to the public at the public offering price set forth in the
cover page of this Prospectus and part of the shares to certain dealers at a
price which represents a concession not in excess of $          per share under
the public offering price. The Underwriters may allow, and such dealers may
reallow, a concession not in excess of $          per share to certain other
dealers. After the offering, the offering price and other selling terms may be
changed. The Representatives have advised the Company that the Underwriters do
not intend to confirm sales to any accounts over which they exercise
discretionary authority.
 
     The Company has granted to the Underwriters an option, exercisable for 30
days from the date of this Prospectus, to purchase up to an aggregate of 225,000
additional Shares, respectively, at the public offering price set forth on the
cover page of this Prospectus minus the underwriting discounts and commissions.
The Underwriters may exercise such option solely for the purpose of covering
over-allotments, if any, in connection with the sale of the shares offered
hereby. To the extent such option is exercised, each Underwriter will be
obligated, subject to certain conditions, to purchase approximately the same
percentage of such additional shares as the number of share set forth opposite
such Underwriter's name in the preceding table bears to the total number of
share in such table.
 
     The Company and all of its directors and executives officers, who
beneficially hold an aggregate of 2,334,592 Shares, have agreed that, for a
period of 180 days following the date of this Prospectus, they will not, without
the prior written consent of the Representatives, offer, sell, contract to sell,
or otherwise dispose of any Shares of the Company; provided, however, that the
Company may issue and sell up to 377,184 Common Shares pursuant to the Option
Plans in effect on the date of this Prospectus or to non-employee Directors.
 
     Prior to the offering, there has not been any public market for the Common
Shares of the Company. Consequently, the initial public offering price for the
Shares included in the offering will be determined by negotiations between the
Company and the Representatives. Among the factors to be considered in
determining such price are the history of and prospects for the Company's
business and the industry in which it competes, an assessment of the Company's
management and the present state of the Company's development, the past and
present revenues and earnings of the Company, the prospects for the growth of
Company's revenues and earnings, the current state of the economy in the United
States and the current level of economic activity in the industry in which the
Company competes and in related or comparable industries,
 
                                       47
<PAGE>   49
 
and currently prevailing conditions in the securities markets, including current
market valuations of publicly traded companies that are comparable to the
Company.
 
     The Company has agreed to indemnify the Underwriters against certain
liabilities, including certain liabilities under the Securities Act or to
contribute to payments that the Underwriters may be required to make in respect
thereof.
 
     The Underwriters have reserved for sale, at the initial public offering
price, up to           of the Shares offered hereby for employees of the Company
and certain other individuals who have expressed an interest in purchasing such
Shares in the offering. The number of shares available for sale to the general
public will be reduced to the extent such persons purchase such reserved shares.
Any reserved shares not so purchased will be offered by the Underwriters to the
general public on the same basis as the other shares offered hereby.
 
                                       48
<PAGE>   50
 
                                 LEGAL MATTERS
 
     The validity of the Shares offered hereby will be passed upon for the
Company by Ice Miller Donadio & Ryan, Indianapolis, Indiana. Certain legal
matters in connection with this offering will be passed upon for the
Underwriters by Honigman Miller Schwartz & Cohn.
 
                                    EXPERTS
 
     The consolidated financial statements of Bioanalytical Systems, Inc. at
September 30, 1996 and 1995, and for each of the three years in the period ended
September 30, 1996, appearing in this Prospectus and Registration Statement,
have been audited by Ernst & Young LLP, independent auditors, as set forth in
their report thereon appearing elsewhere herein, and are included in reliance
upon such report given upon the authority of such firm as experts in accounting
and auditing.
 
                             ADDITIONAL INFORMATION
 
     The Company has filed with the Securities and Exchange Commission,
Washington, D.C. 20549 (the "Commission"), a Registration Statement on Form S-1
under the Securities Act with respect to the Shares offered hereby. This
Prospectus does not contain all of the information set forth in the Registration
Statement and the exhibits and schedules thereto. Statements contained in this
Prospectus as to the contents of any contract or any other document referred to
are not necessarily complete, and, in each instance, if such contract or
document is filed as an exhibit, reference is made to the copy of such contract
or document filed as an exhibit to the Registration Statement. Each statement is
qualified in all respects by such reference to such exhibit. The Registration
Statement, including exhibits and schedules thereto, is publicly available
through the Commission's World Wide Web site (http:/www.sec.gov) or may be
inspected and copied at the public reference facilities maintained by the
Commission at Room 1024, 450 Fifth Street, N.W., Washington, D.C. 20549, and at
the Commission's regional offices located at Seven World Trade Center, 13th
Floor, New York, New York 10048 and 500 West Madison Street, Suite 1400,
Chicago, Illinois 60661. Copies of such material may be obtained at prescribed
rates by writing the Commission, Public Reference Section, 450 Fifth Street,
N.W., Washington, D.C. 20549.
 
                                       49
<PAGE>   51
 
                                    GLOSSARY
 
     AIDS: A fatal disease that destroys the host's immune system resulting from
infection with human immunodeficiency virus (HIV).
 
     ASSAY: Quantitative measurement of a substance.
 
     BIOANALYTICAL TESTING: Measurement of a drug substance, its metabolites,
and/or naturally occurring compounds in samples that are produced by or are part
of living systems. These samples could include a new drug substance in human
plasma or a neurotransmitter in rat brain tissue. Often the method is custom
built for a particular problem and requires specialized staff and
instrumentation for the procedure's development and validation for use.
 
     CHROMATOGRAPHY: An analytical technique in which a mixture of chemicals is
separated into its discrete components, according to their differing
interactions between moving and stationary chemical phases. The stationary phase
is usually a powder contained in a tube and the moving phase is a gas or a
liquid. Several different detectors have been created to quantify each component
in the mixture after separation.
 
     CLINICAL STUDIES: Human studies designed to distinguish a drug's effect
from other influences. Such studies conducted in the U.S. must be under an
approved IND under the guidance of an institutional review board and in accord
with FDA rules on human studies and informed consent of participants.
 
     CNS: Central Nervous System is that portion of the nervous system having to
do with the brain and spinal cord.
 
     COCKTAIL THERAPY: A combination of drugs generally operating with different
therapeutic mechanisms designed to attack disease hard and early. See drug
interaction studies.
 
     COMPLIANCE: The extent to which a product developer conforms to regulatory
direction or a patient agrees to and follows a prescribed treatment.
 
     CRO: Contract Research Organizations, which help drug companies design and
administer clinical trials.
 
     DISSOLUTION: Release of a given amount of a drug into solution from a solid
dosage form. Dissolution is measured in vitro, under conditions which generally
simulate those which occur in vivo.
 
     DRUG: A chemical used in the diagnosis, treatment or prevention of disease.
 
     DRUG INTERACTION STUDIES: Patients treated with more than one drug may
experience unexpected therapeutic and/or toxic effects. Bioanalytical testing
helps understand and resolve these effects.
 
     EFFECTIVENESS, EFFICACY: The desired measure of a drug's influence on a
disease condition designated as such by the FDA on the basis of "substantial
evidence."
 
     ELECTROCARDIOGRAPHY: A measurement technique that detects and records the
electrical activity of the heart. The EKG detects and records the electrical
potential of the heart during the heartbeat.
 
     ELECTROCHEMISTRY: The study of chemical reactions in which one or more
electrons are added or removed from an atom or molecule. Electrochemistry is
used in two ways for practical purposes. Electricity can alter chemicals (as in
corrosion and analysis) and chemicals can generate electricity (as in batteries
and fuel cells).
 
     ENZYMOLOGY: The study of enzymes, which are complex proteins that catalyze
specific biochemical reactions in the body.
 
     FDA: The Food and Drug Administration, an agency of the Department of
Health and Human Services which is responsible for ensuring compliance with the
federal Food, Drug and Cosmetic Act, as amended.
 
     FLUORESCENCE: Light emitted by a chemical after energy is added to it. The
kind and amount of light is unique to the kind and amount of each chemical. It
can be used as an indirect method of detecting and measuring the concentration
of a chemical.
 
                                       50
<PAGE>   52
 
     GC/MS: Gas Chromatography/Mass Spectrometry. An analytical technique in
which the chemical mix is separated by heating, converting to a gas, passing the
gas over a stationary phase and detecting, identifying, and quantifying the
separated components by Mass Spectrometry.
 
     GENERIC DRUGS: Drug formulations of identical composition with respect to
the active ingredient. Drugs may be generically equivalent but not
therapeutically equivalent.
 
     GLP: Good Laboratory Practices. Regulations that set requirements for
facilities management, maintenance and calibration of equipment, analytical
protocol, quality assurance, data reporting, storage, retrieval and retention
and other controls.
 
     GMP: Current Good Manufacturing Practices. Regulations that set
requirements for sanitation, inspection of raw materials and finished products
and other quality controls.
 
     HIV: A type of retrovirus (human immunodeficiency virus) that is
responsible for the fatal illness, acquired immunodeficiency syndrome (AIDS).
 
     ICH GUIDELINES: International Conference on Harmonization attempting to
normalize drug regulations among several countries.
 
     IND: Investigational New Drug Application. An application that a drug
sponsor must submit to the FDA before beginning tests of a new drug on humans.
The IND contains a plan for the study and is supposed to give a complete picture
of the drug, including its structural formula, animal test results and
manufacturing information.
 
     INDICATION: A sign or circumstance which points to or shows the cause,
pathology, treatment or issue of an attack of disease; that which serves as a
guide or warning.
 
     IN VITRO: Literally, "in glass"; a biologic or biochemical process
occurring outside a living organism.
 
     IN VIVO: Literally, "in life"; a biologic or biochemical process occurring
within a living organism.
 
     KIT: A carefully designed and validated method and collection of tools and
reagents used to determine the presence of an illness or disorder.
 
     LCEC: Liquid Chromatography/Electrochemistry. A technique in which liquid
chromatography is used to separate the components of a mixture. The chemicals
are detected and quantified in an electrochemical cell.
 
     LC/MS: Liquid Chromatography/Mass Spectrometry. A technique in which liquid
chromatography is used to separate the components of a mixture. The separated
chemicals are detected, identified and quantified by Mass Spectrometry.
 
     LIQUID CHROMATOGRAPHY: A chromatographic method in which the stationary
phase is packed in a tubular column and the moving phase is a liquid driven
through the column by a force such as hydraulic pressure or gravity. Components
may be separated on the basis of size, polarity, charge and/or shape.
 
     MASS SPECTROMETRY: A gas phase analytical technique used to identify a
chemical by molecular weight and breakdown products unique to that chemical.
 
     NDA:  New Drug Application. An application requesting FDA approval to
market a new drug for human use in interstate commerce. The application must
contain, among other things, data from specific technical viewpoints for FDA
review -- including chemistry, pharmacology, medical, biopharmaceutics,
statistics and, for anti-infectives, microbiology.
 
     NEUROTRANSMITTER:  A chemical, such as acetylcholine, which is released
from the axon of one neuron and binds to a specific site in the dendrite of an
adjacent neuron, thus triggering a nerve impulse.
 
     PHARMACOKINETICS:  The science which describes, quantitatively, the uptake
of drugs by the body, their biotransformation, their distribution, metabolism,
and elimination from the body.
 
     PHARMACOLOGY:  The science that deals with the effect of drugs on living
organisms.
 
                                       51
<PAGE>   53
 
     PHYSIOLOGY: The study of how living organisms function.
 
     PLA: Product License Application. An application that a drug sponsor must
submit to the FDA before beginning tests of a new biologic drug on humans.
Equivalent to an IND for biologically derived drugs (genetically altered
organisms etc.).
 
     POTENCY:  The power of a medicinal agent to product the desired effects.
 
     PRECLINICAL STUDIES:  Studies that test a drug on animals and other
nonhuman test systems. They must comply with FDA's Good Laboratory Practices
Regulations.
 
     PRODUCT CHARACTERIZATIONS:  Thorough analysis of a product, which may
contain a mixture of chemicals, decomposition products and other components, in
a pharmaceutical formulation.
 
     ROBOTIC SAMPLE PREPARATION AND DISSOLUTION TESTING:  Rapid, cost effective,
fully automated sample preparation and dissolution tests which are typically
quantified by liquid chromatography.
 
     SAFETY:  No drug is completely safe or without the potential for side
effects. Before a drug may be approved for marketing, the law requires the
submission of results of tests adequate to show the drug is safe under the
conditions of use in the proposed labeling. Thus, "safety" is determined case by
case and reflects the drug's risk v. benefit relationship.
 
     SBIR GRANTS:  Federal Small Business Innovation Research and Small Business
Technology Transfer Grants. These support research in topics of interest to
NASA, NIH, etc. Awards, term and degree of industry involvement vary.
 
     SOLID PHASE EXTRACTION: An analytical separation technique in which a
mixture of chemicals is stirred with a solid, usually a powder. The solid is
chosen for its ability to bind specifically to one or more of the chemicals in
the mixture. After mixing, the solid with the bound chemicals attached is
separated from the extracted sample and washed. The chemicals are subsequently
removed with a solvent and analyzed.
 
     SPECTROSCOPY/SPECTROMETRY: An analytical technique used to identify a
chemical by observing how it interacts with visible, infrared, or ultraviolet
light, magnetism, radio waves or other parts of the electromagnetic energy
spectrum. Each part of each chemical absorbs and/or emits this energy
differently. A spectroscope/spectrometer measures the kind and amount of energy
and in some cases the chemical breakdown products. Each chemical has a unique
energy fingerprint that enables identification.
 
     STABILITY:  The quality of maintaining a constant character in the presence
of forces which threaten to disturb it; resistance to change. In drugs,
maintaining therapeutic efficacy and chemical composition with changing time,
temperature, humidity, etc.
 
     THERAPEUTICS:  The science and techniques of restoring patients to health.
 
     VALIDITY:  The degree to which output reflects what it purports to reflect.
The degree to which output is a function of known input and it alone.
 
     "VIRTUAL" DRUG COMPANY:  A venture management technique. A "virtual"
company creates, acquires or licenses a new pharmaceutical or device. Most
development, registration, manufacture and commercialization are then carried
out through contracted parties or strategic partners. A small staff and
negligible assets are key characteristics.
 
                                       52
<PAGE>   54
 
                          BIOANALYTICAL SYSTEMS, INC.
 
                         INDEX TO FINANCIAL STATEMENTS
 
<TABLE>
<CAPTION>
                                                                PAGE
                                                                ----
<S>                                                             <C>
Report of Independent Auditors..............................    F-2
Consolidated Balance Sheets as of September 30, 1995 and
  1996, and as of June 30, 1997 (unaudited).................    F-3
Consolidated Statements of Income for the years ended
  September 30, 1994, 1995 and 1996, and for the nine-month
  periods ended June 30, 1996 and 1997 (unaudited)..........    F-4
Consolidated Statements of Preferred Shares and
  Shareholders' Equity for the years ended September 30,
  1994, 1995 and 1996, and for the nine-month period ended
  June 30, 1997 (unaudited).................................    F-5
Consolidated Statements of Cash Flows for the years ended
  September 30, 1994, 1995 and 1996, and for the nine-month
  periods ended June 30, 1996 and 1997 (unaudited)..........    F-6
Notes to Consolidated Financial Statements..................    F-7
</TABLE>
 
                                       F-1
<PAGE>   55
 
                         REPORT OF INDEPENDENT AUDITORS
 
Board of Directors and Shareholders
Bioanalytical Systems, Inc.
 
     We have audited the accompanying consolidated balance sheets of
Bioanalytical Systems, Inc. as of September 30, 1996 and 1995, and the related
consolidated statements of income, preferred shares and shareholders' equity and
cash flows for each of the three years in the period ended September 30, 1996.
These financial statements are the responsibility of the Company's management.
Our responsibility is to express an opinion on these financial statements based
on our audits.
 
     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
     In our opinion, the financial statements referred to above present fairly,
in all material respects, the consolidated financial position of Bioanalytical
Systems, Inc. at September 30, 1996 and 1995, and the consolidated results of
its operations and its cash flows for each of the three years in the period
ended September 30, 1996 in conformity with generally accepted accounting
principles.
 
Indianapolis, Indiana
November 8, 1996, except for Note 10,
as to which the date is
 
     The foregoing report is in the form that will be signed upon the effective
date of the share split described in Note 10 to the financial statements.
 
                                          /s/ ERNST & YOUNG LLP
 
Indianapolis, Indiana
September 25, 1997
 
                                       F-2
<PAGE>   56
 
                          BIOANALYTICAL SYSTEMS, INC.
 
                          CONSOLIDATED BALANCE SHEETS
 
<TABLE>
<CAPTION>
                                                                      SEPTEMBER 30
                                                               --------------------------      JUNE 30
                                                                  1995           1996           1997
                                                                  ----           ----          -------
                                                                                             (UNAUDITED)
<S>                                                            <C>            <C>            <C>
ASSETS
Current assets:
  Cash and cash equivalents................................    $ 1,799,515    $   595,339    $   240,597
  Accounts receivable (Note 4):
    Trade..................................................      1,541,625      1,545,843      2,165,627
    Other..................................................        109,933        105,966        384,258
  Inventories (Notes 3 and 4)..............................      1,783,233      1,931,850      2,088,216
  Deferred income taxes (Note 5)...........................        165,791        164,753        164,753
  Prepaid expenses.........................................         28,778         38,710         48,061
                                                               -----------    -----------    -----------
Total current assets.......................................      5,428,875      4,382,461      5,091,512
Goodwill, less accumulated amortization of $18,002 in 1996
  and $27,228 in 1997 (Note 2).............................        240,032        222,030        213,256
Other assets...............................................         51,859        290,496        485,616
Property and equipment (Note 4):
  Land and improvements....................................        166,621        166,621        171,014
  Buildings and improvements...............................      2,152,640      4,282,317      6,486,243
  Machinery and equipment..................................      2,823,646      3,742,979      4,089,107
  Office furniture and fixtures............................        515,460        620,319        663,444
                                                               -----------    -----------    -----------
                                                                 5,658,367      8,812,236     11,409,808
  Less accumulated depreciation and amortization...........     (1,951,561)    (2,333,356)    (2,777,255)
                                                               -----------    -----------    -----------
                                                                 3,706,806      6,478,880      8,632,553
                                                               -----------    -----------    -----------
Total assets...............................................    $ 9,427,572    $11,373,867    $14,422,937
                                                               ===========    ===========    ===========
LIABILITIES, PREFERRED SHARES AND SHAREHOLDERS' EQUITY
Current liabilities:
  Accounts payable.........................................    $   805,883    $   730,110    $   621,518
  Income taxes payable.....................................        115,574         33,562          6,862
  Accrued expenses.........................................        281,335        239,826        481,560
  Customer advances........................................         26,000         19,871         19,871
  Current portion of long-term debt........................        119,605        300,115        300,115
  Line of credit...........................................             --             --        300,000
                                                               -----------    -----------    -----------
Total current liabilities..................................      1,348,397      1,323,484      1,729,926
Long-term debt, less current portion (Note 4)..............        416,234      2,512,027      4,382,538
Deferred income taxes (Note 5).............................        953,745      1,053,144      1,451,143
Preferred shares (Note 6):
  Authorized shares -- 1,000,000
  Issued and outstanding shares:
    Redeemable -- 66,667 in 1995 and 22,223 in 1996........        868,997        298,302             --
    Convertible -- 166,667.................................      1,231,242      1,231,242      1,231,242
Shareholders' equity (Note 6):
  Common Shares, no par value:
    Authorized shares -- 19,000,000
    Issued and outstanding shares -- 2,182,148 in 1995;
       2,186,663 in 1996 and 2,247,601 in 1997.............        483,375        484,375        497,875
  Additional paid-in capital...............................        149,233        151,233        178,233
  Retained earnings........................................      3,974,040      4,321,103      4,965,350
  Currency translation adjustment..........................          2,309         (1,043)       (13,370)
                                                               -----------    -----------    -----------
                                                                 4,608,957      4,955,668      5,628,088
                                                               -----------    -----------    -----------
Total liabilities, preferred shares and shareholders'
  equity...................................................    $ 9,427,572    $11,373,867    $14,422,937
                                                               ===========    ===========    ===========
</TABLE>
 
                            See accompanying notes.
 
                                       F-3
<PAGE>   57
 
                          BIOANALYTICAL SYSTEMS, INC.
 
                       CONSOLIDATED STATEMENTS OF INCOME
 
<TABLE>
<CAPTION>
                                         YEAR ENDED SEPTEMBER 30           NINE MONTHS ENDED JUNE 30,
                                 ---------------------------------------   ---------------------------
                                    1994          1995          1996           1996           1997
                                    ----          ----          ----           ----           ----
                                                                           (UNAUDITED)    (UNAUDITED)
<S>                              <C>           <C>           <C>           <C>            <C>
Product revenue................  $ 8,902,658   $ 9,627,393   $ 9,113,297    $6,724,710     $ 7,347,211
Services revenue...............    1,800,547     2,724,469     3,680,838     2,669,972       3,690,569
                                 -----------   -----------   -----------    ----------     -----------
     Total Revenue.............   10,703,205    12,351,862    12,794,135     9,394,682      11,037,780
Cost of product revenue........    3,417,741     3,447,566     3,226,736     2,335,327       2,268,248
Cost of services revenue.......    1,039,727     1,834,349     2,141,715     1,608,897       2,157,008
                                 -----------   -----------   -----------    ----------     -----------
     Total Cost of Revenue.....    4,457,468     5,281,915     5,368,451     3,944,224       4,425,256
                                 -----------   -----------   -----------    ----------     -----------
Gross profit...................    6,245,737     7,069,947     7,425,684     5,450,458       6,612,524
Operating expenses:
  Selling......................    3,530,663     3,940,096     3,937,224     2,987,206       3,094,049
  Research and development.....    1,122,400     1,123,641     1,423,901     1,088,486       1,109,493
  General and administrative...      983,834     1,222,136     1,363,921     1,046,930       1,210,219
                                 -----------   -----------   -----------    ----------     -----------
                                   5,636,897     6,285,873     6,725,046     5,122,622       5,413,761
                                 -----------   -----------   -----------    ----------     -----------
Operating income...............      608,840       784,074       700,638       327,836       1,198,763
Interest income................       60,514        67,492        38,843        35,709           3,587
Interest expense...............      (43,099)      (78,882)      (81,396)      (50,838)        (68,668)
Other income (expense).........      135,873        86,645        28,180         9,007           7,387
Gain (loss) on sale of property
  and equipment................       39,094        35,532        (3,218)           --              --
                                 -----------   -----------   -----------    ----------     -----------
Income before income taxes.....      801,222       894,861       683,047       321,714       1,141,069
Income taxes (Note 5)..........      253,298       344,254       282,648       132,000         470,000
                                 -----------   -----------   -----------    ----------     -----------
Net income.....................  $   547,924   $   550,607   $   400,399    $  189,714     $   671,069
                                 ===========   ===========   ===========    ==========     ===========
Net income available to common
  shareholders.................      494,588       497,271       347,063       136,378         644,021
Net income per common share....  $      0.16   $      0.16   $      0.11    $     0.04     $      0.21
Weighted average Common Shares
  outstanding..................    3,048,398     3,065,567     3,089,308     3,088,865       3,074,491
</TABLE>
 
                            See accompanying notes.
 
                                       F-4
<PAGE>   58
 
                          BIOANALYTICAL SYSTEMS, INC.
 
      CONSOLIDATED STATEMENTS OF PREFERRED SHARES AND SHAREHOLDERS' EQUITY
 
<TABLE>
<CAPTION>
                                      REDEEMABLE   CONVERTIBLE              ADDITIONAL                 CURRENCY
                                      PREFERRED     PREFERRED     COMMON     PAIN-IN      RETAINED    TRANSLATION
                                        SHARES       SHARES       SHARES     CAPITAL      EARNINGS    ADJUSTMENT
                                      ----------   -----------    ------    ----------    --------    -----------
<S>                                   <C>          <C>           <C>        <C>          <C>          <C>
Balance at September 30, 1993.......  $ 762,325    $1,231,242    $459,608    $105,963    $2,982,181    $     --
Net income..........................         --            --          --          --       547,924          --
Accrual of cumulative dividends on
  preferred shares..................     53,336            --          --          --       (53,336)         --
Retirement of 8,446 common shares...         --            --      (1,871)    (15,903)           --          --
Issuance of 47,401 common shares for
  the exercise of stock options.....         --            --      10,500      21,000            --          --
                                      ---------    ----------    --------    --------    ----------    --------
Balance at September 30, 1994.......    815,661     1,231,242     468,237     111,060     3,476,769          --
Net income..........................         --            --          --          --       550,607          --
Accrual of cumulative dividends on
  preferred shares..................     53,336            --          --          --       (53,336)         --
Retirement of 21,949 common
  shares............................         --            --      (4,862)    (41,327)           --          --
Issuance of 67,716 common shares for
  the exercise of stock options.....         --            --      15,000      34,500            --          --
Issuance of 22,572 common shares for
  the acquisition of business (Note
  2)................................         --            --       5,000      45,000            --          --
Currency translation adjustment.....         --            --          --          --            --       2,309
                                      ---------    ----------    --------    --------    ----------    --------
Balance at September 30, 1995.......    868,997     1,231,242     483,375     149,233     3,974,040       2,309
Net income..........................         --            --          --          --       400,399          --
Accrual of cumulative dividends on
  preferred shares..................     53,336            --          --          --       (53,336)         --
Issuance of 4,514 common shares for
  the exercise of stock options.....         --            --       1,000       2,000            --          --
Redemption of Preferred Shares......   (624,031)           --          --          --            --          --
Currency translation adjustment.....         --            --          --          --            --      (3,352)
                                      ---------    ----------    --------    --------    ----------    --------
Balance at September 30, 1996.......    298,302     1,231,242     484,375     151,233     4,321,103      (1,043)
Net income..........................         --            --          --          --       671,295          --
Accrual of cumulative dividends on
  preferred shares..................     27,048            --          --          --       (27,048)         --
Issuance of 60,944 common shares for
  the exercise of stock options.....         --            --      13,500      27,000            --          --
Redemption of Preferred Shares......   (325,350)           --          --          --            --          --
Currency translation adjustment.....         --            --          --          --            --     (12,327)
                                      ---------    ----------    --------    --------    ----------    --------
Balance at June 30, 1997
  (unaudited).......................  $      --    $1,231,242    $497,875    $178,233    $4,965,350    $(13,370)
                                      =========    ==========    ========    ========    ==========    ========
</TABLE>
 
                            See accompanying notes.
 
                                       F-5
<PAGE>   59
 
                          BIOANALYTICAL SYSTEMS, INC.
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                          YEAR ENDED SEPTEMBER 30           NINE MONTHS ENDED JUNE 30
                                   --------------------------------------   -------------------------
                                      1994         1995          1996          1996          1997
                                      ----         ----          ----          ----          ----
                                                                            (UNAUDITED)   (UNAUDITED)
<S>                                <C>          <C>           <C>           <C>           <C>
OPERATING ACTIVITIES
Net income.......................  $  547,924   $   550,607   $   400,399   $   189,714   $   671,295
Adjustments to reconcile net
  income to net cash provided
  (used) by operating activities:
     Depreciation and
       amortization..............     204,421       397,619       399,797       348,591       452,899
     Loss (gain) on sale of
       property and equipment....     (39,094)      (35,532)        3,218            --            --
     Deferred income taxes.......      13,647       107,324       100,437      (247,016)      397,999
     Changes in operating assets
       and liabilities:
          Accounts receivable....     466,126      (118,978)         (251)     (217,367)     (898,076)
          Inventories............    (283,750)       25,365      (148,617)     (172,972)     (156,366)
          Prepaid expenses and
            other assets.........      42,906       (19,367)     (248,569)      123,074      (204,697)
          Accounts payable.......     (59,907)      (46,054)      (75,773)      426,725      (108,592)
          Income taxes payable...    (187,120)      106,760       (82,012)       10,000       (26,700)
          Accrued expenses.......     (35,105)     (312,079)      (41,509)     (582,269)      241,734
          Customer advances......     (50,822)      (36,000)       (6,129)           --            --
                                   ----------   -----------   -----------   -----------   -----------
Net cash provided (used) by
  operating activities...........     619,226       619,665       300,991      (121,520)      369,496
INVESTING ACTIVITIES
Capital expenditures.............    (458,542)   (1,299,910)   (3,178,499)     (563,024)   (2,597,572)
Proceeds from sale of property
  and equipment..................      51,141        61,370        21,412            --            --
Payments for purchase of net
  assets from Technicol Limited,
  net of cash acquired...........          --       (92,731)           --            --            --
                                   ----------   -----------   -----------   -----------   -----------
Net cash used by investing
  activities.....................    (407,401)   (1,331,271)   (3,157,087)     (563,024)   (2,597,572)
FINANCING ACTIVITIES
Borrowings of long-term debt.....          --       422,250     2,401,035            --     1,870,511
Payments of long-term debt.......     (45,822)     (128,255)     (124,732)      (88,748)           --
Borrowings on line of credit.....          --            --            --            --       300,000
Net proceeds from the exercise of
  stock options..................      13,726         3,311         3,000         3,000        40,500
Redemption of preferred shares...          --            --      (624,031)     (594,253)     (325,350)
Other............................          --         2,309        (3,352)       (1,933)      (12,327)
                                   ----------   -----------   -----------   -----------   -----------
Net cash provided (used) by
  financing activities...........     (32,096)      299,615     1,651,920      (681,934)    1,873,334
                                   ----------   -----------   -----------   -----------   -----------
Net increase (decrease) in cash
  and cash equivalents...........     179,729      (411,991)   (1,204,176)   (1,366,478)     (354,742)
Cash and cash equivalents at
  beginning of period............   2,031,777     2,211,506     1,799,515     1,799,515       595,339
                                   ----------   -----------   -----------   -----------   -----------
Cash and cash equivalents at end
  of period......................  $2,211,506   $ 1,799,515   $   595,339   $   433,037   $   240,597
                                   ==========   ===========   ===========   ===========   ===========
</TABLE>
 
                            See accompanying notes.
 
                                       F-6
<PAGE>   60
 
                          BIOANALYTICAL SYSTEMS, INC.
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
     (UNAUDITED WITH RESPECT TO INFORMATION AS OF JUNE 30, 1997 AND FOR THE
                NINE-MONTH PERIODS ENDED JUNE 30, 1996 AND 1997)
 
1. SIGNIFICANT ACCOUNTING POLICIES
 
NATURE OF BUSINESS
 
     Bioanalytical Systems, Inc. and its subsidiaries (the "Company")
manufacture scientific instruments for use in the determination of trace amounts
of organic compounds in biological, environmental and industrial materials. The
Company sells its equipment and software for use in industrial, governmental and
academic laboratories. The Company also engages in laboratory services,
consulting and research related to analytical chemistry and chemical
instrumentation. The Company's customers are located in the United States and
throughout the world.
 
PRINCIPLES OF CONSOLIDATION
 
     The consolidated financial statements include the accounts of the Company
and its wholly-owned subsidiaries. All significant inter-company accounts and
transactions have been eliminated.
 
CASH EQUIVALENTS
 
     The Company considers all short-term, highly liquid investments to be cash
equivalents.
 
FINANCIAL INSTRUMENTS
 
     Management has estimated that the fair value of financial instruments,
including cash and cash equivalents, accounts receivable, accounts payable and
debt approximates the carrying values.
 
INVENTORIES
 
     Inventories are stated at the lower of cost or market. Cost is determined
using the last-in, first-out (LIFO) method.
 
GOODWILL
 
     Goodwill represents the excess of cost of acquisitions over the fair value
of net assets acquired and is amortized by the straight-line method over a
twenty year period.
 
PROPERTY AND EQUIPMENT
 
     Property and equipment is recorded at cost. Depreciation is computed using
the straight-line method over the estimated useful lives of 10 through 40 years.
Expenditures for maintenance and repairs are charged to expense as incurred.
 
     The Financial Accounting Standards Board (FASB) issued Statement of
Accounting Standards No. 121, "Accounting for Impairment of Long-Lived Assets
and for Assets to be Disposed of," which the Company adopted effective October
1, 1995. SFAS No. 121 requires that long-lived assets and certain identifiable
intangibles held and used by the Company be reviewed for possible impairment
whenever events or changes in circumstances indicate the carrying amount of an
asset may not be recoverable. Adoption of the Statement and its application
during 1996 did not have an impact on the Company's financial position or
results of operations.
 
                                       F-7
<PAGE>   61
 
                          BIOANALYTICAL SYSTEMS, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- CONTINUED
 
1. SIGNIFICANT ACCOUNTING POLICIES -- CONTINUED
REVENUE RECOGNITION
 
     Revenue from the sale of the Company's products and the related costs are
recognized upon shipment of the products to customers. The Company's
pharmaceutical service contracts generally have terms ranging from several
months to several years. A portion of the contract fee is generally payable upon
receipt of the initial samples with the balance payable in installments over the
life of the contract. The Company's contracts are broken down into discrete
units of deliverable services for which a fixed fee for each unit is established
and revenue and related direct costs are recognized as specific contract terms
are fulfilled under the percentage of completion method utilizing units of
delivery.
 
INCOME TAXES
 
     The Company computes its income tax provision in accordance with Statement
of Financial Accounting Standards No. 109, "Accounting for Income Taxes" (SFAS
109). SFAS 109 requires recognition of deferred tax liabilities and assets for
the expected future tax consequences of events that have been included in the
financial statements or tax returns. Under this method, deferred tax liabilities
and assets are determined based on the difference between the financial
statement and tax bases of assets and liabilities. These deferred taxes are
measured by applying the provisions of tax laws in effect at the balance sheet
date.
 
ADVERTISING EXPENSE
 
     The Company expenses advertising costs as incurred. Advertising expense was
$201,570, $238,612, and $267,184 for 1994, 1995, and 1996, respectively.
 
NET INCOME PER COMMON SHARE
 
     Net income per common share is computed on the basis of the weighted
average number of common and common equivalent shares outstanding during each
year. Common equivalent shares include options to purchase Common Shares and
convertible preferred shares. In this computation, net income is reduced by
dividends accrued on the redeemable preferred shares.
 
     Supplemental net income per share is computed by dividing supplemental net
income (which includes net income plus interest expense, net of the related
income tax benefit) by the weighted average number of shares that would have
been outstanding after giving effect to the number of shares that were required
to be sold in this public offering to repay borrowings under the Company's line
of credit and long-term debt facilities at October 1, 1995. Supplemental net
income per share were $0.12 and $0.22, respectively, for 1996 and for the
nine-month period ended June 30, 1997.
 
USE OF ESTIMATES
 
     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the amounts reported in the financial statements and
accompanying notes. Actual results could differ from those estimates.
 
RECENTLY ISSUED ACCOUNTING STANDARDS
 
     In July 1997, the Financial Accounting Standards Board (FASB) issued
Statement No. 131 (SFAS 131), "Disclosures about Segments of an Enterprise and
Related Information". Under SFAS 131, the Company will report financial and
descriptive information about its operating segments. SFAS 131 is effective for
fiscal years beginning after December 15, 1997. The Company plans to adopt SFAS
131 on October 1, 1998. The Company has not yet evaluated the impact of adoption
of SFAS 131.
 
                                       F-8
<PAGE>   62
 
                          BIOANALYTICAL SYSTEMS, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- CONTINUED
 
1. SIGNIFICANT ACCOUNTING POLICIES -- CONTINUED
     In June 1997, the FASB issued Statement of Financial Accounting Standards
No. 130 (SFAS 130), "Reporting Comprehensive Income." SFAS 130 establishes
standards for reporting and display of comprehensive income in the financial
statements. SFAS 130 is effective for fiscal years beginning after December 15,
1997. The Company plans to adopt SFAS 130 on October 1, 1998. The Company has
not yet evaluated the impact of SFAS 130.
 
     In February 1997, the FASB issued Statement of Financial Accounting
Standards No. 128 (SFAS 128), "Earnings per Share", which replaces the
presentation of primary earnings per share (EPS) with basic EPS and replaces
fully diluted EPS with diluted EPS. It also requires dual presentation of basic
and diluted EPS on the face of the income statement for all entities with
complex capital structures and requires a reconciliation of the components of
the basic EPS computation to the components of the diluted EPS computation. SFAS
128 is effective for both interim and annual periods ending after December 15,
1997. Earlier adoption is not permitted. Upon adoption, all prior-period EPS
data presented will be restated. The Company does not anticipate the adoption of
SFAS 128 to have a significant effect on EPS.
 
     In October 1995, the FASB issued Statement of Financial Accounting
Standards No. 123, "Accounting for Stock-based Compensation." Companies are
required to adopt the provisions of this Statement for fiscal years beginning
after December 15, 1995. The Company has not yet adopted the new rules and, upon
adoption for the year ending September 30, 1997, presently intends to continue
to measure compensation cost using Accounting Principles Board Opinion No. 25,
"Accounting for Stock Issued to Employees."
 
UNAUDITED INTERIM FINANCIAL STATEMENTS
 
     The accompanying unaudited consolidated financial statements have been
prepared in accordance with generally accepted accounting principles for interim
financial information and with the instructions to Article 10 of Regulation S-X
of the Securities Exchange Act of 1934. Accordingly, they do not include all of
the information and footnotes required by generally accepted accounting
principles for complete financial statements.
 
     In the opinion of the Company, all adjustments (consisting of only normal
recurring accruals) considered necessary to present fairly the consolidated
financial position as of June 30, 1997 and the consolidated statements of
income, preferred shares and shareholders' equity and cash flows for the
nine-month periods ended June 30, 1996 and 1997 have been included.
 
2. ACQUISITION
 
     Effective April 3, 1995 the Company acquired all of the capital stock of
Technicol, Limited for cash approximating $97,000 and 22,572 common shares. The
acquired business was involved in the distribution of chromatography equipment
and supplies to pharmaceutical firms in the United Kingdom.
 
     The acquisition was accounted for using the purchase method of accounting
and the results of operations have been included in the consolidated financial
statements since the date of acquisition. The purchase price was allocated to
the net assets acquired, including $240,032 to goodwill, based upon the fair
market value at the date of acquisition.
 
     On an unaudited pro forma basis, revenue, net income and net income per
share for the year ended September 30, 1994 were $11,229,000, $589,000 and
$0.17, respectively, and for the year ended September 30, 1995, were
$12,892,000, $510,000 and $0.15, respectively. This pro forma data presents the
consolidated results of operations as if the acquisition had occurred on October
1, 1993, after giving effect to certain adjustments, including amortization of
goodwill, increased interest expense and related income tax effects. The pro
forma results have been prepared for comparative purposes only and do not
purport to indicate the
 
                                       F-9
<PAGE>   63
 
                          BIOANALYTICAL SYSTEMS, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- CONTINUED
 
2. ACQUISITION -- CONTINUED
results of operations which would actually have occurred had the acquisition
been in effect on the date indicated, or which may occur in the future.
 
     Pro forma amounts for the years ended September 30, 1994 and 1995 include
the acquired entity's financial data for the years ended April 30, 1994 and 1995
as it was not practicable to determine the September 30, 1994 and 1995 year end
results.
 
3. INVENTORIES
 
     Inventories at September 30 consisted of:
 
<TABLE>
<CAPTION>
                                                                 1995         1996
                                                                 ----         ----
<S>                                                           <C>          <C>
Raw materials...............................................  $  759,124   $  803,396
Work in progress............................................     196,995      292,076
Finished goods..............................................     838,360      868,153
                                                              ----------   ----------
                                                               1,794,479    1,963,625
LIFO reserve................................................     (11,246)     (31,775)
                                                              ----------   ----------
Total LIFO cost.............................................  $1,783,233   $1,931,850
                                                              ==========   ==========
</TABLE>
 
4. DEBT ARRANGEMENTS
 
     The Company has a bank line of credit agreement which expires April 29,
1997 and allows borrowings of the lesser of 50% of inventories plus 80% of
qualified accounts receivable or $2,200,000. Interest is charged at the prime
rate plus .25% (8.50% at September 30, 1996). At September 30, 1996, the
collateral base for this line of credit resulted in borrowing availability of
approximately $2,000,000, all of which was unused at September 30, 1996. At June
30, 1997, $300,000 was outstanding on this line. The line is collateralized by
inventories and accounts receivable. The expiration date of the line of credit
has been extended to March 1, 1998.
 
     During 1996 the Company entered into a credit facility for up to $5,000,000
for the purchase and renovation of an adjacent building (the "Construction
loan"). At maturity (January 31, 1998), the loan may be converted to a five year
term loan based upon a 20 year amortization funding on a conventional commercial
mortgage basis or with fixed principal payments plus interest. Interest is
charged at the prime rate plus .25% (8.50% at September 30, 1996). This credit
facility is collateralized by property and equipment. The agreement contains
certain covenants, which among other things require the Company to maintain
minimum levels of tangible net worth and debt service coverage.
 
                                      F-10
<PAGE>   64
 
                          BIOANALYTICAL SYSTEMS, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- CONTINUED
 
4. DEBT ARRANGEMENTS -- CONTINUED
     Long-term debt at September 30 consisted of the following:
 
<TABLE>
<CAPTION>
                                                                1995         1996
                                                                ----         ----
<S>                                                           <C>         <C>
Construction loan, monthly payments of interest only at
  8.50% variable per annum..................................  $      --   $1,972,003
Equipment loan, monthly payments of $8,803 including
  interest at 8.50% per annum...............................         --      423,900
Mortgage note collateralized by certain real estate, monthly
  payments of $4,827 including interest at 9% per annum.....    187,222      144,412
Capital lease obligations (Note 7)..........................    348,617      271,827
                                                              ---------   ----------
                                                                535,839    2,812,142
Less current portion........................................   (119,605)    (300,115)
                                                              ---------   ----------
                                                              $ 416,234   $2,512,027
                                                              =========   ==========
</TABLE>
 
     The maturities of long-term debt for the five succeeding years are as
follows:
 
<TABLE>
<CAPTION>
                 YEARS ENDED SEPTEMBER 30
                 ------------------------
<S>                                                           <C>
       1997...............................................    $300,115
       1998...............................................     198,308
       1999...............................................     222,660
       2000...............................................     138,840
       2001...............................................     143,217
</TABLE>
 
     Cash interest payments of $37,852, $69,602, and $99,057 were made in 1994,
1995, and 1996, respectively. Cash interest payments for 1996 include interest
of $28,868 on the Construction loan which was capitalized. These amounts include
interest required to be paid on a portion of the undistributed earnings of a
subsidiary which qualifies as a domestic international sales corporation (see
Note 5).
 
     The Company has a bank line of credit agreement for capital expenditures
which expires March 1, 1998 and allows borrowings of the lesser of 80% of
capital expenditures or $1,000,000. Interest is charged at the prime rate plus
 .25% (8.50% at June 30, 1997). At June 30, 1997, this line was unused. The line
is collateralized by property and equipment, inventories and accounts
receivable.
 
                                      F-11
<PAGE>   65
 
                          BIOANALYTICAL SYSTEMS, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- CONTINUED
 
5. INCOME TAXES
 
     Significant components of the Company's deferred tax liabilities and assets
as of September 30 are as follows:
 
<TABLE>
<CAPTION>
                                                                 1995         1996
                                                                 ----         ----
<S>                                                           <C>          <C>
Deferred tax liabilities:
  Tax over book depreciation................................  $  564,488   $  712,032
  Deferred DISC income......................................     456,338      398,280
                                                              ----------   ----------
Total deferred liabilities..................................   1,020,826    1,110,312
Deferred tax assets:
  Tax credit carryforwards..................................     141,709       91,493
  Net operating loss carryforwards..........................      24,194       14,876
  Inventory pricing.........................................      68,941       72,669
  Accrued vacation..........................................      50,778       57,916
  Other-net.................................................      47,250       34,184
                                                              ----------   ----------
Total deferred tax assets...................................     332,872      271,138
                                                              ----------   ----------
Valuation allowance for deferred tax assets.................    (100,000)     (49,217)
                                                              ----------   ----------
Net deferred tax assets.....................................     232,872      221,921
                                                              ----------   ----------
Net deferred tax liabilities................................  $  787,954   $  888,391
                                                              ==========   ==========
</TABLE>
 
     Significant components of the provision for income taxes are as follows:
 
<TABLE>
<CAPTION>
                                                            1994        1995        1996
                                                            ----        ----        ----
<S>                                                       <C>         <C>         <C>
Current:
  Federal.............................................    $175,000    $170,721    $123,625
  State...............................................      64,651      66,209      58,586
                                                          --------    --------    --------
Total current.........................................     239,651     236,930     182,211
Deferred:
  Federal.............................................      14,506     100,181      81,928
  State...............................................        (859)      7,143      18,509
                                                          --------    --------    --------
Total deferred........................................      13,647     107,324     100,437
                                                          --------    --------    --------
                                                          $253,298    $344,254    $282,648
                                                          ========    ========    ========
</TABLE>
 
     The effective income tax rate varied from the statutory federal income tax
rate as follows:
 
<TABLE>
<CAPTION>
                                                                1994       1995       1996
                                                                ----       ----       ----
<S>                                                             <C>        <C>        <C>
Statutory federal income tax rate...........................    34.0%      34.0%      34.0%
Increases (decreases):
  Amortization of goodwill and other nondeductible
     expenses...............................................     0.9        1.0        2.1
  Benefit of foreign sales corporation, net.................    (2.6)      (3.2)      (4.0)
  State income taxes, net of federal tax benefit............     5.3        5.4        7.5
  Other.....................................................    (6.0)       1.3        1.8
                                                                ----       ----       ----
                                                                31.6%      38.5%      41.4%
                                                                ====       ====       ====
</TABLE>
 
     Net operating loss carryforwards were generated by a subsidiary of the
Company prior to its acquisition by the Company and the carryforwards are
restricted to use by that subsidiary. These carryforwards expire through the
year 2004. The tax credit carryforwards amounted to $91,493 at September 30,
1996 and expire
 
                                      F-12
<PAGE>   66
 
                          BIOANALYTICAL SYSTEMS, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- CONTINUED
 
5. INCOME TAXES -- CONTINUED
through the year 2010. As management cannot determine that it is more likely
than not that these carryforwards can be fully utilized in the future, a
valuation allowance of $49,217 has been recorded.
 
     In fiscal 1996, the Company's foreign operations generated a loss before
income taxes of $200,145.
 
     Payments made in 1994, 1995, and 1996 for federal and state income taxes
amounted to $422,300, $163,950, and $160,000, respectively.
 
6. PREFERRED SHARES AND SHAREHOLDERS' EQUITY
 
PREFERRED SHARES
 
     On February 27, 1991 the Board of Directors approved the issuance of up to
1,000,000 shares of Preferred Shares. The Board of Directors designated 105,000
shares as Redeemable Preferred Shares ($10.00 stated value) and designated
250,000 shares as Convertible Preferred Shares ($8.00 stated value).
 
     The Redeemable Preferred Shares have preference over all other outstanding
classes of capital shares of the Company with respect to payment of dividends.
Holders of Redeemable Preferred Shares are entitled to receive, when and as
declared by the Board of Directors, cumulative preferential cash dividends at
the rate of $.80 per share per annum payable quarterly in arrears, however, they
do not participate with respect to other dividends declared by the Company.
Although such dividends have not been declared, the Company has recorded the
dividends as a charge to Retained Earnings and an increase to Redeemable
Preferred Shares. The Redeemable Preferred Shares were redeemed by the Company
in three equal installments on December 31, 1995, June 30, 1996 and December 1,
1996 at $10.00 per share plus accrued unpaid dividends.
 
     The holders of the Convertible Preferred Shares have the right at any time
to convert those shares, in whole or in part and without additional
consideration, into fully paid Common Shares. The conversion rate is one Common
Shares for each Convertible Preferred Share at September 30, 1996 (4.514 Common
Shares for each Convertible Preferred Share after the share split described in
Note 10). Holders of Convertible Preferred Shares are entitled to one vote per
share on any matter submitted to a vote of the holders of Common Shares. No cash
dividends may be declared and paid with respect to the Common Shares unless
equivalent dividends are also declared and paid with respect to the Convertible
Preferred Shares. These shares are redeemable, at the option of the holders, in
three equal installments on December 31, 1995, June 30, 1996 and December 31,
1996, at a redemption price of $8.00 per share plus any accrued unpaid
dividends. No redemption requests were made by the holders.
 
     Alternatively, the holders of the Convertible Preferred Shares may require
the Company to purchase all or any portion of the Convertible Preferred Shares
and any Common Shares obtained through the conversion of the Convertible
Preferred Shares at any time after March 15, 1996 at a price equal to the
greater of the amount such shares are entitled to receive upon liquidation of
the Company or fair market value. The fair market value could exceed the $8
optional redemption price. As of September 30, 1996, no redemption requests had
been made by the holders.
 
     The Company must maintain certain restrictive covenants in accordance with
the preferred stock agreement, including net worth and indebtedness
requirements, restrictions on the declaration of dividends, redemption of Common
Shares, issuance of Preferred and Common Shares and capital expenditure levels.
 
STOCK OPTION PLANS
 
     During 1990, the Company established an Employee Incentive Stock Option
Plan whereby options to purchase shares of the Company's Common Shares at fair
market value can be granted to employees of the
 
                                      F-13
<PAGE>   67
 
                          BIOANALYTICAL SYSTEMS, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- CONTINUED
 
6. PREFERRED SHARES AND SHAREHOLDERS' EQUITY -- CONTINUED
Company. Options granted become exercisable in four equal installments beginning
two years after the date of the grant. The plan terminates in the year 2000.
 
     During fiscal 1989, the Company established an Outside Director Stock
Option Plan whereby options to purchase shares of the Company's Common Shares at
fair market value can be granted to outside directors. Options granted become
exercisable in four equal installments beginning two years after the date of
grant. The plan terminates in 1999.
 
     The Company intends to adopt a new stock option plan in connection with its
initial public offering and accordingly does not plan to grant any more options
pursuant to the plans discussed above.
 
     The following presents information regarding options granted through
September 30, 1996.
 
<TABLE>
<CAPTION>
                                            AVAILABLE      OPTIONS                     OPTION PRICE
                                            FOR GRANT    OUTSTANDING    EXERCISABLE      PER SHARE
                                            ---------    -----------    -----------    ------------
<S>                                         <C>          <C>            <C>            <C>
The Employee Incentive Stock
  Option Plan...........................     735,847      252,355        169,967       $.66 to $2.31
The Outside Director Stock Option
  Plan..................................      27,086       81,259         81,259            .66
</TABLE>
 
     No options were granted in fiscal 1995 or 1996. Options exercised during
1994, 1995 and 1996 had a weighted average exercise price of $.66, $.73 and
$.66, respectively.
 
     A special non-qualified option was granted for 4,514 shares of Common
Shares at $1.27 per share to a consultant to the Company in August 1991. This
option remains outstanding at September 30, 1996.
 
7. CAPITAL LEASE
 
     The Company has a capital lease arrangement to finance the acquisition of
equipment. Future minimum lease payments, based upon scheduled payments under
the lease arrangement, as of September 30, 1996 are as follows:
 
<TABLE>
<S>                                                             <C>
1997........................................................    $102,504
1998........................................................     102,504
1999........................................................     102,504
                                                                --------
Total minimum lease payments................................     307,512
Amounts representing interest...............................     (35,685)
                                                                --------
Present value of minimum lease payments.....................    $271,827
                                                                ========
</TABLE>
 
     The total amount of property and equipment capitalized under capital lease
obligations as of both September 30, 1995 and 1996 was $486,043. Accumulated
amortization at September 30, 1995 and 1996 was $72,587 and $121,191,
respectively. The amortization is included in depreciation expense.
 
8. RETIREMENT PLAN
 
     Effective July 1, 1984, the Company established an Internal Revenue Code
Section 401(k) Retirement Plan covering all employees over twenty-one years of
age with at least one year of service. Under the terms of the Plan, the Company
contributes 2% of each participant's total wages to the Plan. The Plan also
includes provisions for various contributions which may be instituted at the
discretion of the Board of Directors. The contribution made by the participant
may not exceed 10% of the participant's annual wages. Contribution expense was
$79,067, $110,489, and $138,142 in 1994, 1995 and 1996, respectively.
 
                                      F-14
<PAGE>   68
 
                          BIOANALYTICAL SYSTEMS, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- CONTINUED
 
9. SEGMENT INFORMATION
 
     The Company operates in two principal segments -- analytical services and
analytical products. The Company's analytical services unit provides analytical
chemistry support on a contract basis directly to pharmaceutical companies. The
Company's analytical products unit provides liquid chromatography,
electrochemical, and physiological monitoring products to pharmaceutical
companies, universities, government research centers and medical research
institutions.
 
INDUSTRY SEGMENT DATA:
 
<TABLE>
<CAPTION>
                                                               YEAR ENDED SEPTEMBER 30,
                                                              ---------------------------
                                                               1994      1995      1996
                                                               ----      ----      ----
                                                                    (IN THOUSANDS)
<S>                                                           <C>       <C>       <C>
REVENUE
Products....................................................  $ 8,903   $ 9,627   $ 9,113
Services....................................................    1,801     2,725     3,681
                                                              -------   -------   -------
Total Revenue...............................................  $10,704   $12,352   $12,794
                                                              =======   =======   =======
OPERATING INCOME (LOSS)
Products....................................................  $   311   $   409   $  (254)
Services....................................................      400       490     1,113
                                                              -------   -------   -------
Total Operating Income (Loss)...............................      711       899       859
Corporate income (expenses).................................       90        (4)     (176)
                                                              -------   -------   -------
Income before income taxes..................................  $   801   $   895   $   683
                                                              =======   =======   =======
IDENTIFIABLE ASSETS
Products....................................................  $ 6,791   $ 6,993   $ 6,242
Services....................................................    1,372     2,435     5,132
                                                              -------   -------   -------
Total Assets................................................  $ 8,163   $ 9,428   $11,374
                                                              =======   =======   =======
DEPRECIATION AND AMORTIZATION
Products....................................................  $   140   $   266   $   224
Services....................................................       64       132       176
                                                              -------   -------   -------
                                                              $   204   $   398   $   400
                                                              =======   =======   =======
CAPITAL EXPENDITURES
Products....................................................  $   293   $   468   $   450
Services....................................................      166       832     2,728
                                                              -------   -------   -------
                                                              $   459   $ 1,300   $ 3,178
                                                              =======   =======   =======
</TABLE>
 
EXPORT SALES:
 
     Export sales to unaffiliated customers by destination of sales are
summarized as follows (in thousands):
 
<TABLE>
<CAPTION>
                                                              YEAR ENDED SEPTEMBER 30,
                                                              ------------------------
                                                               1994     1995     1996
                                                               ----     ----     ----
<S>                                                           <C>      <C>      <C>
Europe......................................................  $  988   $  933   $1,144
Pacific Rim.................................................   2,064    2,898    2,903
Other.......................................................     952      836      556
                                                              ------   ------   ------
                                                              $4,004   $4,667   $4,603
                                                              ======   ======   ======
</TABLE>
 
                                      F-15
<PAGE>   69
 
                          BIOANALYTICAL SYSTEMS, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- CONTINUED
 
9. SEGMENT INFORMATION -- CONTINUED
MAJOR CUSTOMERS:
 
     During 1996, a major United States-based pharmaceutical company accounted
for approximately 18.3% of the Company's total revenues.
 
     The Company sells its products through international distributors, one of
which represents 20%, 18%, and 19% of 1994, 1995 and 1996 product sales,
respectively. Accounts receivable from this foreign distributor are $200,861 and
$196,416 at September 30, 1995 and 1996, respectively.
 
10. SUBSEQUENT EVENT (UNAUDITED)
 
     On September 24, 1997, the Company's Board of Directors approved a 4.514
for 1 share split of common shares to be effective upon completion of the
Company's initial public offering. All common share and per share amounts and
information concerning stock option plans have been adjusted retroactively to
give effect to this stock split.
 
                                      F-16
<PAGE>   70
 
======================================================
 
     NO DEALER, SALESMAN OR OTHER PERSON HAS BEEN AUTHORIZED TO GIVE ANY
INFORMATION OR MAKE ANY REPRESENTATIONS OTHER THAN THOSE CONTAINED IN THIS
PROSPECTUS IN CONNECTION WITH THE OFFER MADE BY THIS PROSPECTUS, AND, IF GIVEN
OR MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING
BEEN AUTHORIZED BY THE COMPANY OR ANY OF THE UNDERWRITERS. NEITHER THE DELIVERY
OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL, UNDER ANY CIRCUMSTANCES,
CREATE ANY IMPLICATION THAT INFORMATION CONTAINED HEREIN IS CORRECT AS OF ANY
TIME SUBSEQUENT TO THE DATE HEREOF. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER
TO SELL OR SOLICITATION OF ANY OFFER TO BUY ANY SECURITY OTHER THAN THE
SECURITIES OFFERED BY THIS PROSPECTUS OR AN OFFER TO SELL OR A SOLICITATION OF
AN OFFER TO BUY THE SECURITIES IN ANY JURISDICTION TO ANY PERSON TO WHOM IT IS
UNLAWFUL TO MAKE SUCH OFFER OR SOLICITATION IN SUCH JURISDICTION.
 
                            ------------------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                          PAGE
                                          ----
<S>                                       <C>
Prospectus Summary....................      3
Risk Factors..........................      5
Use of Proceeds.......................     10
Dividend Policy.......................     10
Dilution..............................     11
Capitalization........................     12
Selected Consolidated Financial
  Data................................     13
Management's Discussion and Analysis
  of Financial Condition and Results
  of Operations.......................     14
Business..............................     20
Management............................     34
Certain Transactions..................     41
Principal Shareholders................     42
Description of Capital Stock..........     43
Shares Eligible for Future Sale.......     45
Underwriting..........................     47
Legal Matters.........................     49
Experts...............................     49
Additional Information................     49
Glossary..............................     50
Index to Financial Statements.........    F-1
</TABLE>
 
                            ------------------------
 
     UNTIL                     , 1997 (25 DAYS AFTER THE DATE OF THIS
PROSPECTUS), ALL DEALERS EFFECTING TRANSACTIONS IN COMMON SHARES, WHETHER OR NOT
PARTICIPATING IN THE DISTRIBUTION, MAY BE REQUIRED TO DELIVER A PROSPECTUS. THIS
DELIVERY REQUIREMENTS IS IN ADDITION TO THE OBLIGATION OF DEALERS TO DELIVER A
PROSPECTUS WHEN ACTING AS UNDERWRITER WITH RESPECT TO THEIR UNSOLD ALLOTMENTS OR
SUBSCRIPTIONS.
 
======================================================
======================================================
 
                            1,500,000 COMMON SHARES
 
                           BIOANALYTICAL SYSTEMS LOGO
 
                          BIOANALYTICAL SYSTEMS, INC.
 
                         -----------------------------
 
                                   PROSPECTUS
                         -----------------------------
 
                                  RONEY & CO.
 
                                THE OHIO COMPANY
 
                                               , 1997
======================================================
<PAGE>   71
 
                                    PART II
 
                   INFORMATION NOT REQUIRED IN THE PROSPECTUS
 
ITEM 13. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.
 
     The following is a statement of the estimated expenses to be paid by the
Registrant in connection with the issuance and distribution of the securities
being registered:
 
<TABLE>
<CAPTION>
                          EXPENSES                            AMOUNT*
                          --------                            -------
<S>                                                           <C>
Securities and Exchange Commission registration fee.........  $ 5,750
National Association of Securities Dealers, Inc. fee........    2,398
NASDAQ fee..................................................
Printing and engraving expenses.............................
Legal fees and expenses.....................................
Accounting fees and expenses................................
Blue Sky fees and expenses (including fees of counsel)......
Transfer agent and registrar fees and expenses..............
Miscellaneous...............................................
                                                              -------
     Total..................................................  $
                                                              =======
</TABLE>
 
- -------------------------
* All of the expenses, except the Securities and Exchange Commission
  registration fee, the National Association of Securities Dealers, Inc. fee and
  the Nasdaq fee, are estimated.
 
ITEM 14. INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
     The Indiana Business Corporation Law ("BCL"), the provisions of which
govern the Registrant, empowers an Indiana corporation to indemnify present and
former directors, officers, employees, or agents or any person who may have
served at the request of the corporation as a director, officer, employee, or
agent of another corporation ("Eligible Persons") against liability incurred in
any proceeding, civil or criminal, in which the Eligible Person is made a party
by reason of being or having been in any such capacity, or arising out of his
status as such, if the individual acted in good faith and reasonable believed
that (a) the individual was acting in the best interests of the corporation, or
(b) if the challenged action was taken other than in the individual's official
capacity as an officer, director, employee or agent, the individual's conduct
was at least not opposed to the corporation's best interests, or (c) if in a
criminal proceeding, either the individual had reasonable cause to believe his
conduct was lawful or no reasonable cause to believe his conduct was unlawful.
 
     The BCL further empowers a corporation to pay or reimburse the reasonable
expenses incurred by an Eligible Person in connection with the defense of any
such claim, including counsel fees; and, unless limited by its articles of
incorporation, the corporation is required to indemnify an Eligible Person
against reasonable expenses if he is wholly successful in any such proceeding,
on the merits or otherwise. Under certain circumstances, a corporation may pay
or reimburse an Eligible Person for reasonable expenses prior to final
disposition of the matter. Unless a corporation's articles of incorporation
otherwise provide, an Eligible Person may apply for indemnification to a court
which may order indemnification upon a determination that the Eligible Person is
entitled to mandatory indemnification for reasonable expenses or that the
Eligible Person is fairly and reasonably entitled to indemnification in view of
all the relevant circumstances without regard to whether his actions satisfied
the appropriate standard of conduct.
 
     Before a corporation may indemnify any Eligible Person against liability or
reasonable expenses under the BCL, a quorum consisting of directors who are not
parties to the proceeding must (1) determine that indemnification is permissible
in the specific circumstances because the Eligible Person met the requisite
standard of conduct, (2) authorize the corporation to indemnify the Eligible
Person and (3) if appropriate, evaluate the reasonableness of expenses for which
indemnification is sought. If it is not possible to obtain a quorum of
uninvolved directors, the foregoing action may be taken by a committee of two or
more directors
 
                                      II-1
<PAGE>   72
 
who are not parties to the proceeding, special legal counsel selected by the
Board or such a committee, or by the shareholders of the corporation.
 
     In addition to the foregoing, the BCL states that the indemnification it
provides shall not be deemed exclusive of any other rights to which those
indemnified may be entitled under any provision of the articles of incorporation
or bylaws, resolution of the board of directors or shareholders, or any other
authorization adopted after notice by a majority vote of all the voting shares
then issued and outstanding. The BCL also empowers an Indiana corporation to
purchase and maintain insurance on behalf of any Eligible Person against any
liability asserted against or incurred by him in any capacity as such, or
arising out of his status as such, whether or not the corporation would have had
the power to indemnify him against such liability.
 
     Reference is made to Article V of the Amended and Restated Articles of
Incorporation of the Registrant concerning indemnification of directors,
officers, employees and agents.
 
     The Registrant may obtain directors' and officers' liability insurance, the
effect of which will be to indemnify the directors and officers of the
corporation and its subsidiaries against certain losses caused by errors,
misleading statements, wrongful acts, omissions, neglect or breach of duty by
them or any matter claimed against them in their capacities as directors and
officers.
 
ITEM 15. RECENT SALES OF UNREGISTERED SECURITIES.
 
     The Registrant has issued the following securities during the three year
period ended September 24, 1997:
 
          1. An aggregate of 142,560 Common Shares were issued to five key
     employees at various times upon the exercise of options granted pursuant to
     the Registrant's 1990 Employee Stock Option Plan for consideration equal to
     the fair market value of the shares purchased on the date of the option
     grant. The issuance of these Common Shares was exempt from registration
     under the Securities Act by reason of Rule 701 of the Commission and
     Section 4(2) thereof.
 
          2. An aggregate of 22,572 Common Shares were issued on April 3, 1995,
     to a single individual in connection with and as partial consideration for
     the acquisition by the Registrant of all of the outstanding shares of
     Technicol Ltd. The issuance of these Common Shares was exempt from
     registration under the Securities Act by reason of Section 4(2) thereof.
 
     The share data set forth above has been adjusted for the 4.514 for 1 share
split described in the Prospectus.
 
ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.
 
     (a) Exhibits:
 
     The list of exhibits is incorporated herein by reference to the Index to
Exhibits.
 
     (b) Financial Statement Schedules:
 
     No schedules have been provided because the required information is not
applicable.
 
ITEM 17. UNDERTAKINGS.
 
     The undersigned Registrant hereby undertakes to provide to the Underwriters
at the closing specified in the Underwriting Agreement certificates in such
denominations and registered in such names as required by the Underwriters to
permit prompt delivery to each purchaser.
 
     Insofar as indemnification by the Registrant for liabilities arising under
the Securities Act of 1933 may be permitted to directors, officers and
controlling persons of the Registrant pursuant to the foregoing provisions, or
otherwise, the Registrant has been advised that in the opinion of the Securities
and Exchange Commission such indemnification is against public policy as
expressed in the Securities Act and is, therefore, unenforceable. In the event
that a claim for indemnification for such liabilities (other than the payment by
the Registrant of expenses incurred or paid by a director, officer or
controlling person of the Registrant in the
 
                                      II-2
<PAGE>   73
 
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Securities Act and will be governed by the final
adjudication of such issue.
 
     The undersigned Registrant hereby undertakes that:
 
          (1) For purposes of determining any liabilities under the Securities
     Act of 1933, the information omitted from the form of prospectus filed as
     part of this Registration Statement in reliance upon Rule 430A and
     contained in the form of prospectus to be filed by the Registrant pursuant
     to Rule 424(b)(1) or (4) or 497(h) under the Securities Act shall be deemed
     to be part of this Registration Statement as of the time it was declared
     effective.
 
          (2) For the purpose of determining any liability under the Securities
     Act of 1933, each post-effective amendment that contains a form of
     prospectus shall be deemed to be a new Registration Statement relating to
     the securities offered therein, and the offering of such securities at that
     time shall be deemed to be the initial bona fide offering thereof.
 
                                      II-3
<PAGE>   74
 
                                   SIGNATURES
 
     PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE REGISTRANT
HAS DULY CAUSED THIS REGISTRATION STATEMENT TO BE SIGNED ON ITS BEHALF BY THE
UNDERSIGNED, THEREUNTO DULY AUTHORIZED, IN THE CITY OF WEST LAFAYETTE, STATE OF
INDIANA, ON THE 26TH DAY OF SEPTEMBER, 1997.
 
                                          BIOANALYTICAL SYSTEMS, INC.
 
                                          By:    /s/ PETER T. KISSINGER
 
                                            ------------------------------------
                                                    Peter T. Kissinger,
                                               President and Chief Executive
                                                           Officer
 
                               POWER OF ATTORNEY
 
     Each person whose signature appears below irrevocably constitutes and
appoints Peter T. Kissinger and Ronald E. Shoup, and each or either of them
(with full power to act alone), his or her true and lawful attorneys-in-fact and
agents with full power of substitution and re-substitution, for him or her and
in his name, place and stead, in any and all capacities, to sign any and all
amendments to this registration statement therewith filed with the Securities
and Exchange Commission, granting unto said attorneys-in-fact and agents full
power and authority to do and perform each and every act and thing requisite and
necessary to be done in and about the premises, as fully to all intents and
purposes as he might or could do in person, hereby ratifying and confirming all
that said attorneys-in-fact, agents or their substitute or substitutes may
lawfully do or cause to be done by virtue hereof.
 
     PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THIS
REGISTRATION STATEMENT HAS BEEN SIGNED BELOW BY THE FOLLOWING PERSONS IN THE
CAPACITIES AND ON THE DATES INDICATED:
 
<TABLE>
<CAPTION>
                SIGNATURE                                 CAPACITY                       DATE
                ---------                                 --------                       ----
<S>                                         <C>                                   <C>
 
          /s/ PETER T. KISSINGER            President and Chief Executive         September 26, 1997
- ------------------------------------------  Officer (Principal Executive
            Peter T. Kissinger              Officer) and Director
 
         /s/ CANDICE B. KISSINGER           Director                              September 26, 1997
- ------------------------------------------
           Candice B. Kissinger
 
           /s/ RONALD E. SHOUP              Director                              September 26, 1997
- ------------------------------------------
             Ronald E. Shoup
 
          /s/ WILLIAM BAITINGER             Director                              September 26, 1997
- ------------------------------------------
            William Baitinger
 
           /s/ THOMAS A. HIATT              Director                              September 26, 1997
- ------------------------------------------
               Thomas Hiatt
 
            /s/ JOHN KRAEUTLER              Director                              September 26, 1997
- ------------------------------------------
              John Kraeutler
 
                                            Director                              , 1997
- ------------------------------------------
            W. Leigh Thompson
 
</TABLE>
                                      II-4
<PAGE>   75
<TABLE>
<CAPTION>
                SIGNATURE                                 CAPACITY                       DATE
                ---------                                 --------                       ----
<C>                                         <S>                                   <C>
                                            Director                              , 1997
- ------------------------------------------
             William Mulligan
 
           /s/ MICHAEL CAMPBELL             Director                              September 26, 1997
- ------------------------------------------
              Mike Campbell
 
          /s/ DOUGLAS P. WIETEN             (Principal Financial Officer and      September 26, 1997
- ------------------------------------------  Accounting Officer)
              Douglas Wieten
</TABLE>
 
                                      II-5
<PAGE>   76
 
                          BIOANALYTICAL SYSTEMS, INC.
 
                             REGISTRATION STATEMENT
                                       ON
                                    FORM S-1
 
                               INDEX TO EXHIBITS
 
<TABLE>
<CAPTION>
NUMBER ASSIGNED IN
  REGULATION S-K     EXHIBIT
     ITEM 601        NUMBER                        DESCRIPTION OF EXHIBIT
- ------------------   -------                       ----------------------
<C>                  <C>        <S>
 
        (1)           1.1       Form of Underwriting Agreement
        (2)                     No Exhibit
        (3)           3.1       Form of Second Restated Articles of Incorporation of
                                Bioanalytical Systems, Inc.
                      3.2       Form of Second Restated Bylaws of Bioanalytical Systems,
                                Inc.
        (4)           4.1       Form of Specimen Certificate for Common Shares*
                      4.2       See Exhibits 3.1 and 3.2
                      4.3       Form of Letter Agreement dated September   , 1997, by and
                                among Bioanalytical Systems, Inc., Primus Capital Fund II,
                                L.P. and Middlewest Ventures II, L.P.
        (5)           5.1       Opinion of Ice Miller Donadio & Ryan
        (6)                     No Exhibit
        (7)                     No Exhibit
        (8)                     No Exhibit
        (9)                     No Exhibit
       (10)          10.1       Form of Employee Confidentially Agreement
                     10.2       Bioanalytical Systems, Inc. Outside Director Stock Option
                                Plan
                     10.3       Form of Bioanalytical Systems, Inc. Outside Director Stock
                                Option Agreement
                     10.4       Bioanalytical Systems, Inc. 1990 Employee Incentive Stock
                                Option Plan
                     10.5       Form of Bioanalytical Systems, Inc. 1990 Employee Incentive
                                Stock Option Agreement
                     10.6       Letter/Loan Agreement by and between Bioanalytical Systems,
                                Inc. and Bank One, Lafayette, N.A. dated May 31, 1997 for up
                                to $5,000,000 Construction Loan
                     10.7       Note for $4,720,000 executed by Bioanalytical Systems, Inc.,
                                in favor of Bank One, Lafayette, N.A., dated July 19, 1996
                     10.8       Loan Agreement by and between Bioanalytical Systems, Inc.
                                and Bank One, Lafayette, N.A., dated July 22, 1992 for up to
                                $700,000
                     10.9       Credit Agreement by and between Bioanalytical Systems, Inc.
                                and Bank One, Lafayette, N.A., dated July 24, 1992 relating
                                to loan of up to $300,000
                     10.10      Promissory Note for $300,000 executed by Bioanalytical
                                Systems, Inc. in favor of Bank One, Lafayette, N.A. dated
                                July 24, 1992.
                     10.11      Letter Loan Agreement by and between Bioanalytical Systems,
                                Inc. and Bank One, Indiana, N.A., dated April 15, 1997.
                     10.12      Promissory Note for $2,200,000 executed by Bioanalytical
                                Systems, Inc. in favor of Bank One, Indiana, N.A. dated May
                                9, 1997
</TABLE>
 
                                      II-6
<PAGE>   77
<TABLE>
<CAPTION>
NUMBER ASSIGNED IN
  REGULATION S-K     EXHIBIT
     ITEM 601        NUMBER                        DESCRIPTION OF EXHIBIT
- ------------------   -------                       ----------------------
<C>                  <C>        <S>
                     10.13      Promissory Note for $1,000,000 executed by Bioanalytical
                                Systems, Inc. in favor of Bank One, Indiana, N.A. dated May
                                9, 1997
                     10.14      Indemnifying Mortgage by and between Bioanalytical Systems,
                                Inc. and Bank One, Lafayette, N.A. dated January 23, 1987.
                     10.15      Real Estate Mortgage by and between Bioanalytical Systems,
                                Inc. and Bank One, Lafayette, N.A., dated July 19, 1996
                     10.16      Security Agreement by and between Bioanalytical System, Inc.
                                and Bank One, Lafayette, N.A., dated April 22, 1991
                     10.17      Security Agreement by and between Bioanalytical Systems,
                                Inc. and Bank One, Lafayette, N.A., dated August 22, 1996.
                     10.18      Master Lease Agreement by and between Bioanalytical Systems,
                                Inc. and Banc One Leasing Corporation, dated November 9,
                                1994
                     10.19      Financing Lease by and between Bioanalytical Systems, Inc.
                                and Banc One Leasing Corporation, dated November 9, 1994
                     10.20      Purchase Agreement Commercial-Industrial Real Estate by and
                                between Great Lakes Chemical Corporation and Bioanalytical
                                Systems, Inc.
       (11)          11.1       Statement Regarding Computation of Per Share Earnings
       (12)                     No Exhibit
       (14)                     No Exhibit
       (15)                     No Exhibit
       (16)                     No Exhibit
       (21)          21.1       List of Subsidiaries
       (23)          23.1       Consent of Ice Miller Donadio & Ryan (included in Exhibit
                                5.1)
                     23.2       Consent of Ernst & Young LLP, independent auditors
       (24)          24.1       See Signature Page
       (25)                     No Exhibit
       (26)                     No Exhibit
       (27)          27.1       Financial Data Schedule
       (28)                     No Exhibit
       (99)                     No Exhibit
</TABLE>
 
- -------------------------
* To be filed by amendment.
 
                                      II-7

<PAGE>   1
                                                                    EXHIBIT 1.1


                          BIOANALYTICAL SYSTEMS, INC.

                               1,500,000 SHARES*
                                  COMMON STOCK

                             UNDERWRITING AGREEMENT


                                                                  ________, 1997

Roney & Co., L.L.C.
The Ohio Company
     As representatives of the several Underwriters
        named in Schedule I hereto,
c/o Roney & Co., L.L.C.,
One Griswold
Detroit, Michigan  48226


Ladies and Gentlemen:

     Bioanalytical Systems, Inc., an Indiana corporation (the "Company"),
proposes, subject to the terms and conditions stated herein, to issue and sell
to the Underwriters named in Schedule I hereto (the "Underwriters") an
aggregate of 1,500,000 shares (the "Firm Shares") of the Company's Common
Stock, no par value (the "Common Stock") and up to an aggregate of 225,000
shares (the "Optional Shares") of Common Stock (the Firm Shares and the
Optional Shares that the Underwriters elect to purchase pursuant to Section 2
hereof being collectively referred to as the "Shares").

     1. (a) The Company represents and warrants to, and agrees with, each of
the Underwriters that:

           (i) A registration statement on Form S-1 (File No. 333-_________) as
      amended by any pre-effective amendment thereto in respect of the Shares
      (the "Initial Registration Statement") has been filed with the Securities
      and Exchange Commission (the "Commission"); the Initial Registration
      Statement and any post-effective amendment thereto, each in the form
      heretofore delivered to you, and, excluding exhibits thereto, as the same
      may have been amended from time to time, to each of the other
      Underwriters, have been declared effective by the Commission in such
      form; other than a registration statement, if any, increasing the size of
      the offering (a "Rule 462(b) Registration Statement"), filed pursuant to
      Rule 462(b) under the Securities Act of 1933, as amended (the "Act"),     
      which became effective upon filing, no other document with respect to the
        

- -----------------
      *Plus an option to acquire from the Company up to 225,000 additional
shares to cover overallotments.

<PAGE>   2

      Initial Registration Statement has heretofore been filed with the
      Commission; and no stop order suspending the effectiveness of the Initial
      Registration Statement, any post-effective amendment thereto or the Rule
      462(b) Registration Statement, if any, has been issued and no proceeding
      for that purpose has been initiated or threatened by the Commission (any
      preliminary prospectus included in the Initial Registration Statement or
      filed with the Commission pursuant to Rule 424(a) of the rules and
      regulations of the Commission under the Act, as amended, is hereinafter
      called a "Preliminary Prospectus;" the various parts of the Initial
      Registration Statement and the Rule 462(b) Registration Statement, if
      any, including all exhibits thereto and including the information
      contained in the form of the final prospectus filed with the Commission
      pursuant to Rule 424(b) under the Act in accordance with Section 5(a)
      hereof and deemed by virtue of Rule 430A under the Act to be part of the
      Initial Registration Statement at the time it was declared effective or
      such part of the Rule 462(b) Registration Statement, if any, that became
      or hereafter becomes effective, each as amended at the time such part of
      the registration statement became effective, is hereinafter collectively
      called the "Registration Statement;" and such final prospectus, in the
      form first filed pursuant to Rule 424(b) under the Act, is hereinafter
      called the "Prospectus");

           (ii) No order preventing or suspending the use of any Preliminary
      Prospectus has been issued by the Commission, and each Preliminary
      Prospectus, at the time of filing thereof, conformed in all material
      respects to the requirements of the Act and the rules and regulations of
      the Commission thereunder, and did not contain an untrue statement of a
      material fact or omit to state a material fact required to be stated
      therein or necessary to make the statements therein, in the light of the
      circumstances under which they were made, not misleading; provided,
      however, that this representation and warranty shall not apply to any
      statements or omissions made in reliance upon and in conformity with
      information furnished in writing to the Company by an Underwriter through
      the Representatives expressly for use therein; and

           (iii) The Registration Statement conforms, and the Prospectus and
      any further amendments or supplements to the Registration Statement or
      the Prospectus will conform, in all material respects to the requirements
      of the Act and the rules and regulations of the Commission thereunder and
      do not and will not, as of the applicable effective date of the
      Registration Statement and any amendment thereto, and as of the
      applicable filing date of the Prospectus and any amendment or supplement
      thereto, contain an untrue statement of a material fact or omit to state
      a material fact required to be stated therein or necessary to make the
      statements therein not misleading; provided, however, that this
      representation and warranty shall not apply to any statements or
      omissions made in reliance upon and in conformity with information
      furnished in writing to the Company by an Underwriter through the
      Representatives expressly for use therein;

                                      2
<PAGE>   3


     (b) The Company represents and warrants to, and agrees with, each of the
Underwriters that:

           (i)  Since the respective dates as of which information is given in
      the Registration Statement and the Prospectus, there has not been any
      material adverse change in or affecting the general affairs, business,
      management, financial position, stockholders' equity, results of
      operations or prospects of the Company, otherwise than as set forth or
      contemplated in the Prospectus;

           (ii) The Company has been duly incorporated and is validly existing
      as a corporation in good standing under the laws of the State of Indiana,
      with power and authority (corporate and other) to own its properties and
      conduct its business as described in the Prospectus, and has been duly
      qualified as a foreign corporation for the transaction of business and is
      in good standing under the laws of each other jurisdiction in which it
      owns or leases properties, or conducts any business so as to require such
      qualification;

          (iii) The Company has an authorized capitalization as set forth in
      the Prospectus, and all of the issued shares of capital stock of the
      Company have been duly and validly authorized and issued and are fully
      paid and nonassessable;

           (iv) The Shares have been duly and validly authorized and, when
      issued and delivered against payment therefor as provided herein, will be
      duly and validly issued and fully paid and nonassessable and will conform
      in all material respects to the description of the Common Stock contained
      in the Prospectus;

           (v) The issue and sale of the Shares by the Company and the
      compliance by the Company with all of the provisions of this Agreement
      and the consummation of the transactions herein contemplated will not
      conflict with or result in a breach or violation of any of the terms or
      provisions of, or constitute a default under, any indenture, mortgage,
      deed of trust, loan agreement or other agreement or instrument to which
      the Company is a party or by which the Company is bound or to which any
      of the property or assets of the Company is subject, nor will such action
      result in any violation of the provisions of the Articles of
      Incorporation (or other charter document) or By-laws of the Company or
      any statute, ordinance, rule or regulation, or any order, decree, rule or
      regulation of any court or governmental agency or body having
      jurisdiction over the Company or any of its properties; and no consent,
      approval, authorization, order, registration or qualification of or with
      any such court or governmental agency or body is required for the issue
      and sale of the Shares or the consummation by the Company of the
      transactions contemplated by this Agreement, except the registration
      under the Act and such consents, approvals, authorizations,
      registrations, notifications or qualifications as may be required under
      state securities or Blue Sky laws in connection with the purchase and
      distribution of the Shares by the Underwriters;

                                      3

<PAGE>   4


           (vi) The Company is not in violation of its Articles of
      Incorporation or By-laws or in default in the performance or observance
      of any material obligation, agreement, covenant or condition contained in
      any indenture, mortgage, deed of trust, loan agreement, lease or other
      agreement or instrument to which it is a party or by which it or any of
      its properties may be bound;

           (vii) The statements set forth in the Prospectus under the caption
      "Description of Capital Stock," insofar as it purports to constitute
      a summary of the terms of the capital stock of the Company, and under the
      captions "Business -- Product Liability and Insurance," "-- Legal
      Proceedings," "Certain Transactions" and "Management" insofar as they 
      purport to describe the provisions of the laws and documents referred 
      to therein, are accurate, complete in all material respects and fair;

           (viii) Other than as set forth in the Prospectus, there are no legal
      or governmental proceedings pending to which the Company is a party or of
      which any property of the Company is the subject which, if determined
      adversely to the Company would individually or in the aggregate have a
      material adverse effect on the financial position, stockholders' equity
      or results of operations of the Company; and, to the best of the
      Company's knowledge, no such proceedings are threatened or contemplated
      by any governmental authorities or threatened by others;

           (ix) The Company is not and, after giving effect to the offering and
      sale of the Shares, will not be an "investment company" or an entity
      "controlled" by an "investment company," as such terms are defined in the
      Investment Company Act of 1940, as Amended (the "Investment Company
      Act");

           (x) The Company does not do business with the government of Cuba or
      with any person or affiliate located in Cuba within the meaning of
      Section 517.075, Florida Statutes;

           (xi) Ernst & Young, L.L.P., who have certified certain financial
      statements of the Company, are independent public accountants as required
      by the Act and the rules and regulations of the Commission thereunder;

           (xii) This Agreement has been duly authorized, executed and
      delivered by the Company;

           (xiii) There are no contracts or documents which are required to be
      described in the Registration Statement or the Prospectus or to be filed
      as exhibits thereto which have not been so described and filed as
      required;

           (xiv) No filing with, or authorization, approval, consent, license,
      order, registration, notification, qualification or decree of, any court
      or governmental authority or agency is necessary or required for the
      performance by the Company of its obligations hereunder, in connection
      with the offering, issuance or sale of the Common Stock

                                      4
<PAGE>   5


      hereunder or the consummation of the transactions contemplated by this
      Agreement, except such as have been already obtained or as may be
      required under the Act or the rules and regulations thereunder or state
      securities laws;

           (xv) The Company possesses such permits, licenses, approvals,
      consents, and other authorizations (collectively "Governmental Licenses")
      issued by the appropriate federal, state, local or foreign regulatory
      agencies or bodies necessary to conduct the business now operated by it;
      the Company is in compliance with the terms and conditions of all such
      Governmental Licenses, except where the failure so to comply would not
      have a material adverse effect on the financial position, stockholders'
      equity or results of operations of the Company; all of the Governmental
      Licenses are valid and in full force and effect, except where the
      invalidity of such Governmental Licenses or the failure of such
      Governmental Licenses to be in full force and effect would not have a
      material adverse effect on the financial position, stockholders' equity
      or results of operations of the Company; the Company has not received any
      notice of proceedings relating to the revocation or modification of any
      such Governmental Licenses which singly or in the aggregate, if the
      subject of an unfavorable decision, ruling or finding, would result in a
      material adverse effect on the financial position, stockholders' equity
      or results of operations of the Company; and

           (xvi) There are no persons with registration rights or other similar
      rights to have any securities registered pursuant to the Registration
      Statement or otherwise registered by the Company under the Act.

      2. Subject to the terms and conditions herein set forth, (a) the Company
agrees to issue and sell to each of the Underwriters, and each of the
Underwriters agrees, severally and not jointly, to purchase from the Company,
at a purchase price per share of $[     ] the number of Firm Shares set forth
opposite the name of such Underwriter in Schedule I hereto and (b) in the event
and to the extent that the Underwriters shall exercise the election to purchase
Optional Shares as provided below, the Company agrees to issue and sell to each
of the Underwriters, and each of the Underwriters agrees, severally and not
jointly, to purchase from the Company, at the purchase price per share set
forth in clause (a) of this Section 2, that portion of the number of Optional
Shares as to which such election shall have been exercised (to be adjusted so
as to eliminate fractional shares) determined by multiplying such number of
Optional Shares by a fraction, the numerator of which is the maximum number of
Optional Shares which such Underwriter is entitled to purchase as set forth
opposite the name of such Underwriter in Schedule I hereto and the denominator
of which is the maximum number of Optional Shares that all of the Underwriters
are entitled to purchase hereunder.

      The Company hereby grants to the Underwriters the right to purchase at
their election up to 225,000 Optional Shares, at the purchase price per share
set forth in the paragraph above, for the sole purpose of covering
overallotments in the sale of the Firm Shares.  Any such election to
purchase Optional Shares may be exercised only by written notice from the
Representatives to the Company, given within a period of 30 business days after
the date of this Agreement, 

                                      5

<PAGE>   6

setting forth the aggregate number of Optional Shares to be purchased and the
date on which such Optional Shares are to be delivered, as determined by the
Representatives.
        
     As compensation to the Underwriters for their commitments hereunder, the
Company at each Time of Delivery (as defined in Section 4 hereof) will pay to
Roney & Co., L.L.C. ("Roney"), for the accounts of the several Underwriters, an
amount equal to $____per share for the Shares to be delivered by the Company
hereunder at such Time of Delivery.

     3. Upon the authorization by you of the release of the Firm Shares, the
several Underwriters propose to offer the Firm Shares for sale upon the terms
and conditions set forth in the Prospectus.

     4. (a) The Shares to be purchased by each Underwriter hereunder will be
represented by one or more definitive certificates registered in the name of
Roney which will be deposited by or on behalf of the Company with The
Depository Trust Company ("DTC") or its designated custodian.  The Company will
deliver the Shares to Roney, for the account of each Underwriter, against
payment by or on behalf of such Underwriter of the purchase price therefor by
wire transfer to the account specified by the Company in Federal (same day)
funds, by causing DTC to credit the Shares to the account of Roney at DTC.  The
Company will cause the certificates representing the Shares to be made
available to Roney for checking at least 24 hours prior to the Time of Delivery
at the office of DTC or its designated custodian (the "Designated Office").
The time and date of such delivery and payment shall be, with respect to the
Firm Shares, 9:30 A.M., Detroit time, on ______________, 1997 or such other
time and date as the Representatives and the Company may agree upon in writing,
and, with respect to the Optional Shares, 9:30 A.M., Detroit time, on the date
specified by Roney in the written notice given by the Representatives of the
Underwriters' election to purchase such Optional Shares, or such other time and
date as the Representatives and the Company may agree upon in writing.  Such
time and date for delivery of the Firm Shares is herein called the "First Time
of Delivery," such time and date for delivery of the Optional Shares, if not
the First Time of Delivery, is herein called the "Second Time of Delivery," and
each such time and date for delivery is herein called a "Time of Delivery."

     (b) The documents to be delivered at each Time of Delivery by or on behalf
of the parties hereto pursuant to Section 7 hereof, including the cross-receipt
for the Shares and any additional documents requested by the Underwriters
pursuant to Section 7(i) hereof, will be delivered at the offices of Honigman
Miller Schwartz and Cohn, 2290 First National Building, Detroit, MI  48226-3583
(the "Closing Location"), the Shares will be delivered at the Designated
Office, and the wire transfers will be made to the specified accounts, all at
such Time of Delivery.  A meeting will be held at the Closing Location at 2:00
P.M., Detroit time, on the Detroit Business Day next preceding such Time of
Delivery, at which meeting the final drafts of the documents to be delivered
pursuant to the preceding sentence will be available for review by the parties
hereto.  For the purposes of this Section 4, "Detroit Business Day' shall mean
each Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on
which banking institutions in Detroit are generally authorized or obligated by
law or executive order to close.

                                      6

<PAGE>   7

      5. The Company agrees with each of the Underwriters:

     (a) To prepare the Prospectus in a form approved by you and to file such
Prospectus pursuant to Rule 424(b) under the Act not later than the
Commission's close of business on the second business day following the
execution and delivery of this Agreement, or, if applicable, such earlier time
as may be required by Rule 430A(a)(3) under the Act; to make no further
amendment or any supplement to the Registration Statement or Prospectus which
shall be disapproved by you promptly after reasonable notice thereof; to advise
you, promptly after it receives notice thereof, of the time when any amendment
to the Registration Statement has been filed or becomes effective or any
supplement to the Prospectus or any amended Prospectus has been filed and to
furnish you with copies thereof; to advise you, promptly after it receives
notice thereof, of the issuance by the Commission of any stop order or of any
order preventing or suspending the use of any Preliminary Prospectus or
prospectus, of the suspension of the qualification of the Shares for offering
or sale in any jurisdiction, of the initiation or threatening of any proceeding
for any of the foregoing purposes, or of any request by the Commission for the
amending or supplementing of the Registration Statement or Prospectus or for
additional information; and, in the event of the issuance of any stop order or
of any order preventing or suspending the use of any Preliminary Prospectus or
prospectus or suspending any such qualification, promptly to use every
reasonable effort to obtain the withdrawal of such order;

     (b) Promptly from time to time to take such action as you may reasonably
request to qualify the Shares for offering and sale under the securities laws
of such jurisdictions as you may request and to comply with such laws so as to
permit the continuance of sales and dealings therein in such jurisdictions for
as long as may be necessary to complete the distribution of the Shares,
provided that in connection therewith the Company shall not be required to
qualify as a foreign corporation or to file a general consent to service of
process in any jurisdiction;

     (c) As soon after the execution and delivery of this Agreement as possible
and thereafter from time to time for such period as delivery of a Prospectus is
required in connection with the offering or sale of the Shares, to furnish the
Underwriters with copies of the Prospectus in Detroit in such quantities as you
may from time to time reasonably request, and, if the delivery of a prospectus
is required at any time prior to the expiration of nine months after the time
of issue of the Prospectus in connection with the offering or sale of the
Shares and if at such time any event shall have occurred as a result of which
the Prospectus as then amended or supplemented would include an untrue
statement of a material fact or omit to state any material fact necessary in
order to make the statements therein, in the light of the circumstances under
which they were made when such Prospectus is delivered, not misleading, or, if
for any other reason it shall be necessary during such period to amend or
supplement the Prospectus in order to comply with the Act, to notify you
and upon your request to prepare and furnish without charge to each Underwriter
and to any dealer in securities as many copies as you may from time to time
reasonably request of an amended Prospectus or a supplement to the Prospectus
which will correct such statement or omission or effect such compliance, and in
case any Underwriter is required to deliver a prospectus in connection with
sales of any of the Shares at any time nine months or more after the time of
issue of the Prospectus, upon your request but at the expense 

                                      7

<PAGE>   8

of such Underwriter, to prepare and deliver to such Underwriter as many copies
as you may reasonably request of an amended or supplemented Prospectus
complying with Section 10(a)(3) of the Act;

     (d) To make generally available to the Company's security holders as soon
as practicable, but in any event not later than 18 months after the effective
date of the Registration Statement (as defined in Rule 158(c) under the Act),
an earnings statement of the Company complying with Section 11(a) of the Act
and the rules and regulations thereunder (including, at the option of the
Company, Rule 158);

     (e) During the period beginning from the date hereof and continuing to and
including the date 180 days after the effective date of the Registration
Statement, not to offer, sell, contract to sell or otherwise dispose of, other
than for the issuance of shares upon the exercise of stock options, any
securities of the Company that are substantially similar to the Shares without
the consent of the Representatives;

     (f) To the extent necessary to comply with the National Association of
Securities Dealers, Inc. bulletin board rules and regulations or the rules and
regulations of any other exchange on which the Shares are listed, to furnish to
holders of the Shares as soon as practicable after the end of each fiscal year
an annual report (including a balance sheet and statements of income,
stockholders, equity and cash flows of the Company certified by independent
public accountants) and, as soon as practicable after the end of each of the
first three quarters of each fiscal year (beginning with the fiscal quarter
ending after the effective date of the Registration Statement), consolidated
summary financial information of the Company for such quarter in reasonable
detail;

     (g) During a period of three years from the effective date of the
Registration Statement, to furnish to you copies of all reports or other
communications (financial or other) furnished to stockholders of the Company,
and to deliver to you (i) as soon as they are available, copies of any reports
and financial statements furnished to or filed with the Commission or any
national securities exchange on which any class of securities of the Company is
listed; and (ii) such additional information concerning the business and
financial condition of the Company as you may from time to time reasonably
request (such financial statements to be on a consolidated basis to the extent
the accounts of the Company and its subsidiaries (if any) are consolidated in
reports furnished to their stockholders generally or to the Commission);

     (h) To use the net proceeds received by it from the sale of the Shares
pursuant to this Agreement in the manner specified in the Prospectus under the
caption "Use of Proceeds;"

     (i) If the Company elects to rely upon Rule 462(b), the Company shall file
a Rule 462(b) Registration Statement with the Commission in compliance with
Rule 462(b) by 5:00 P.M., Washington, D.C. time, on the date of this Agreement,
and the Company shall at the time of filing either pay to the Commission the
filing fee for the Rule 462(b) Registration Statement 

                                      8

<PAGE>   9

or give irrevocable instructions for the payment of such fee pursuant to Rule
111(b) under the Act;
        
     (j) To file with the Commission such reports on Form SR as may be required
by Rule 463 under the Act.

     6. The Company covenants and agrees with the several Underwriters to pay
or cause to be paid the following: (i) the fees, disbursements and expenses of
their counsel and accountants in connection with the registration of the Shares
under the Act and all other expenses in connection with the preparation,
printing and filing of the Registration Statement, any Preliminary Prospectus
and the Prospectus and amendments and supplements thereto and the mailing and
delivering of copies thereof to the Underwriters and dealers; (ii) the cost of
printing or producing any Agreement among Underwriters, this Agreement and Blue
Sky Memoranda, closing documents (including any compilations thereof) and any
other documents in connection with the offering, purchase, sale and delivery of
the Shares; (iii) all expenses in connection with the qualification of the
Shares for offering and sale under state securities laws, including the fees
and disbursements of counsel for the Underwriters in connection with such
qualification and in connection with the Blue Sky surveys (such Blue Sky costs
not to exceed $10,000); (iv) all fees and expenses in connection with listing
the Shares on the NASDAQ NMS; (v) the cost of preparing stock certificates;
(vi) the cost and charges of any transfer agent or registrar; (vii) the cost
and charges of DTC; (vii) the out-of-pocket expenses of the Underwriters,
including without limitation, road show expenses and the Underwriter's legal
fees and expenses (provided that the Company's obligation to pay such
out-of-pocket expenses shall not exceed the amount of $40,000) and (viii) all
other costs and expenses incident to the performance of its obligations
hereunder which are not otherwise specifically provided for in this Section.
The out-of-pocket expenses of the Underwriters, including the Underwriters'
legal fees and expenses and the fees and disbursements in connection with
qualification of the Shares for offering and sale under state securities laws
shall be paid regardless of whether the offering contemplated hereby is
consummated or not consummated for any reason, including market conditions,
unless the offering is not consummated due to a willful breach of this
Agreement by the Underwriters or because of the Underwriters' inability to
perform their obligations under this Agreement.  Upon consummation of the
offering, the Underwriters' agree to credit such out-of-pocket expenses (up to
a maximum of $40,000) against the fees paid pursuant to Section 2 hereof.

     7. The obligations of the Underwriters hereunder, as to the Shares to be
delivered at each Time of Delivery, shall be subject, in their discretion, to
the condition that all representations and warranties and other statements of
the Company herein are, at and as of such Time of Delivery, true and correct,
the condition that the Company shall have performed all of its obligations
hereunder theretofore to be performed, and the following additional conditions:
        
     (a) The Prospectus shall have been filed with the Commission pursuant to
Rule 424(b) within the applicable time period prescribed for such filing by the
rules and regulations under the Act and in accordance with Section 5(a) hereof;
no stop order suspending the effectiveness of the Registration Statement or any
part thereof shall have been issued and no proceeding for that 

                                      9

<PAGE>   10

purpose shall have been initiated or threatened by the Commission; and all
requests for additional information on the part of the Commission shall have
been complied with to your reasonable satisfaction; if the Company has elected
to rely upon Rule 462(b), the Rule 462(b) Registration Statement shall have
become effective by 5:00 P.M., Washington, D.C. time, on the date of this
Agreement;
        
     (b) Honigman Miller Schwartz and Cohn, counsel for the Underwriters, shall
have furnished to you such opinion or opinions, dated as of such Time of
Delivery, with respect to the validity of the Shares as well as such other
related matters as you may reasonably request, and such counsel shall have
received such papers and information as they may reasonably request to enable
them to pass upon such matters;

     (c) Ice Miller Donadio & Ryan, counsel for the Company, shall have
furnished to you their written opinion, dated such Time of Delivery, in form
and substance satisfactory to you, to the effect that:

           (i) The Company has been duly incorporated and is validly existing
      as a corporation in good standing under the laws of the State of Indiana,
      with power and authority (corporate and other) to own its properties and
      conduct its business as described in the Prospectus;

           (ii) The Company has an authorized capitalization as set forth in
      the Prospectus, and all of the issued shares of capital stock of the
      Company (including the Shares being delivered at such Time of Delivery)
      have been duly and validly authorized and issued and are fully paid and
      non-assessable; and the Shares conform in all material respects to the
      description of the Common Stock contained in the Prospectus;

           (iii) To the knowledge of such counsel and other than as set forth
      in the Prospectus there are no legal or governmental proceedings pending
      to which the Company is a party or of which any property of the Company
      is the subject which, if determined adversely to the Company, would
      individually or in the aggregate have a material adverse effect on the
      current or future consolidated financial position, stockholders' equity
      or results of operations of the Company; and, to the knowledge of such
      counsel, no such proceedings are threatened or contemplated by
      governmental authorities or threatened by others;

           (iv) This Agreement has been duly authorized, executed and delivered
      by the Company;

           (v) The issue and sale of the Shares being delivered at such Time of
      Delivery by the Company and the compliance by the Company with all of the
      provisions of this Agreement and the consummation of the transactions
      herein contemplated will not conflict with or result in a breach or
      violation of any of the terms or provisions of, or constitute a default
      under, any indenture, mortgage, deed of trust, loan agreement or other
      agreement 

                                     10

<PAGE>   11

      or instrument known to such counsel to which the Company is a party or by
      which the Company is bound or to which any of the property or assets of
      the Company is subject, nor will such action result in any violation of
      the provisions of the Articles of Incorporation (or other charter
      document) or By-laws of the Company or any statute or any order, rule or
      regulation known to such counsel of any court or governmental agency or   
      body having jurisdiction over the Company or any of its properties;
        
           (vi) No consent, approval, authorization, order, registration or
      qualification of or with any such court or governmental agency or body is
      required for the issue and sale of the Shares or the consummation by the
      Company of the transactions contemplated by this Agreement, except the
      registration under the Act of the Shares and such consents, approvals,
      authorizations, registrations or qualifications as may be required under,
      state securities or Blue Sky laws in connection with the purchase and
      distribution of the Shares by the Underwriters;

           (vii) The Company is not, to the knowledge of such counsel, (i) in
      violation of its Articles of Incorporation (or other charter documents)
      or By-laws or (ii) in default in the performance or observance of any
      material obligation, agreement, covenant or condition contained in any
      indenture, mortgage, deed of trust, loan agreement, lease or other
      agreement or instrument to which it is a party or by which it or any of
      its properties may be bound;

           (viii) The statements set forth in the Prospectus under the caption,
      "Description of Capital Stock," insofar as they purport to constitute a
      summary of the terms of the capital stock of the Company, and under the
      captions _______________________________ insofar as they constitute or
      purport to describe matters of law or legal conclusions, provisions of
      laws and documents referred to therein, have been reviewed by such
      counsel, are accurate in all material respects and present fairly the
      information required to be shown therein;

           (ix) The Company is not an "investment company" or an entity
      "controlled" by an "investment company," as such terms are defined in the
      Investment Company Act;

           (x) The Registration Statement and the Prospectus and any further
      amendments and supplements thereto made by the Company prior to such Time
      of Delivery (other than the financial statements, related schedules and
      other financial data therein, as to which such counsel need express no
      opinion) comply as to form in all material respects with the requirements
      of the Act and the rules and regulations thereunder; although such
      counsel does not assume any responsibility for the accuracy, completeness
      or fairness of the statements contained in the Registration Statement or
      the Prospectus, except as otherwise indicated in its opinion, such
      counsel has no reason to believe that, as of its effective date, the
      Registration Statement or any further amendment thereto made by the
      Company prior to such Time of Delivery (other than the financial
      statements, related schedules and other financial data therein, as to
      which such counsel need express no opinion) contained an 

                                     11

<PAGE>   12

      untrue statement of a material fact or omitted to state a material fact
      required to be stated therein or necessary to make the statements therein
      not misleading or that, as of its date, the Prospectus or any further
      amendment or supplement thereto made by the Company prior to such Time of
      Delivery (other than the financial statements, related schedules and
      other financial data therein, as to which such counsel need express no
      opinion) contained an untrue statement of a material fact or omitted to
      state a material fact necessary to make the statements therein, in the
      light of the circumstances under which they were made, not misleading or
      that, as of such Time of Delivery, either the Registration Statement or
      the Prospectus or any further amendment or supplement thereto made by the
      Company prior to such Time of Delivery (other than the financial
      statements, related schedules and other financial data therein, as to
      which such counsel need express no opinion) contains an untrue statement
      of a material fact or omits to state a material fact necessary to make
      the statements therein, in the light of the circumstances under which
      they were made, not misleading; and they do not know of any amendment to
      the Registration Statement required to be filed or of any contracts or
      other documents of a character required to be filed as an exhibit to the
      Registration Statement or required to be described in the Registration
      Statement or the Prospectus which are not filed or described as
      required; and
        
      (d) On the date of the Prospectus at a time prior to the execution of this
Agreement, at 9:30 A.M., Detroit time, on the effective date of any
post-effective amendment to the Registration Statement filed subsequent to the
date of this Agreement and also at each Time of Delivery, Ernst & Young, L.L.P.
shall have furnished to you a letter or letters, dated the respective dates of
delivery thereof, in form and substance satisfactory to you, to the effect set
forth in Annex I hereto (the executed copy of the letter delivered prior to the
execution of this Agreement is attached as Annex I(a) hereto and a draft of the
form of letter to be delivered on the effective date of any post-effective
amendment to the Registration Statement and as of each Time of Delivery is
attached as Annex I(b) hereto);

      (e) (i) The Company shall not have sustained since the date of the latest
audited financial statements included in the Prospectus, any loss or
interference with its business from fire, explosion, flood or other calamity,
whether or not covered by insurance, or from any labor dispute or court or
governmental action, order or decree, otherwise than as set forth or
contemplated in the Prospectus, and (ii) since the respective dates as of which
information is given in the Prospectus there shall not have been any change in
the capital stock or long-term debt of the Company or any change in or
affecting the general affairs, business, management, financial position,
stockholders' equity, or results of operations of the Company, otherwise than
as set forth or contemplated in the Prospectus, the effect of which, in any
such case described in clause (i) or (ii), is in the judgment of the
Representative after discussion with the Company so material and adverse as to
make it impracticable or inadvisable to proceed with the public offering or the
delivery of the Shares being delivered at such Time of Delivery on the terms
and in the manner contemplated in the Prospectus;
        
      (f) (x)  On or after the date hereof (i) trading in securities generally
on the NASDAQ NMS shall not have been suspended or materially limited, (ii)
trading in the Shares on the 

                                     12

<PAGE>   13

NASDAQ NMS  shall not have been suspended, (iii) a general moratorium on
commercial banking activities in Detroit shall not have been declared by
Federal or Detroit authorities or (iv) there shall not have occurred any
outbreak of hostilities or escalation thereof or other calamity or crisis
having an adverse effect on the financial markets of the United States and (y)
the occurrence or consequences of any one or more of such events shall have, in
the reasonable judgment of the Underwriters, made it impracticable to market
the Shares on the terms and in the manner contemplated by the Prospectus;
        
     (g) The Shares to be sold at such Time of Delivery shall have been duly
listed, subject to notice of issuance, on the NASDAQ NMS;

     (h) The Company shall have complied with the provisions of Section 5(c)
hereof with respect to the furnishing of Prospectuses;

     (i) The Company shall furnish or cause to be furnished to you at such Time
of Delivery certificates of officers of the Company satisfactory to you as to
the accuracy of the representations and warranties of the Company herein at and
as of such Time of Delivery, as to the performance by the Company of all of its
obligations hereunder to be performed at or prior to such Time of Delivery, as
to the matters set forth in subsections (a) and (e) of this Section and as to
such other matters as you may reasonably request; and

     (j) The Company and its executive officers and directors and certain
shareholders as designated by the Underwriters shall have executed and
delivered Lock-Up Agreements substantially in the form attached hereto as Annex
II.

     8. (a) The Company will indemnify and hold harmless each Underwriter
against any losses, claims, damages or liabilities, joint or several, to which
such Underwriter may become subject, under the Act or otherwise, insofar as
such losses, claims, damages or liabilities (or actions in respect thereof)
arise out of or are based upon an untrue statement or alleged untrue statement
of a material fact contained in any Preliminary Prospectus, the Registration
Statement, the Prospectus, or any amendment or supplement thereto, or arise out
of or are based upon the omission or alleged omission to state therein a
material fact required to be stated therein or necessary to make the
statements therein not misleading, and will reimburse each Underwriter for any
legal or other expenses reasonably incurred by such Underwriter in connection
with investigating or defending any such action or  claim as such expenses are
incurred; provided, however, that the Company shall not be liable in any such
case to the extent that any such loss, claim, damage or liability arises out of
or is based upon an untrue statement or alleged untrue statement or omission or
alleged omission made in any Preliminary Prospectus, the Registration
Statement, the Prospectus, or any such amendment or supplement thereto in
reliance upon and in conformity with written information furnished to the
Company by any Underwriter through the Representatives expressly for use
therein; and provided, further, that with respect to any untrue statement or
omission or alleged untrue statement or omission made in any Preliminary
Prospectus or Preliminary Offering Circular, the indemnity agreement contained
in this subsection (a) shall not inure to the benefit of any Underwriter to the
extent that any such loss, claim, 

                                     13

<PAGE>   14

damage or liability of such Underwriter results from the fact that a copy of
the Prospectus was not sent or given to any person at or prior to the written
confirmation of the sale of such securities to such person.
        
     (b) Each Underwriter will indemnify and hold harmless the Company against
any losses, claims, damages or liabilities to which the Company may become
subject, under the Act or otherwise, insofar as such losses, claims, damages or
liabilities (or actions in respect thereof) arise out of or are based upon an
untrue statement or alleged untrue statement of a material fact contained in
any Preliminary Prospectus, the Registration Statement, the Prospectus, or any
amendment or supplement thereto, or arise out of or are based on the omission
or alleged omission to state therein a material fact required be stated therein
or necessary to make the statements therein not misleading, in each case to the
extent, but only to the extent, that such untrue statement, alleged untrue
statement or omission or alleged omission was made in any Preliminary
Prospectus, the Registration Statement, the Prospectus, or any such amendment
or supplement thereto in reliance upon and in conformity with written
information furnished to the Company by such Underwriter through the
Representatives expressly for use therein.

     (c) Promptly after receipt by an indemnified party under subsections (a)
or (b) above of notice of the commencement of any action, such indemnified
party shall, if a claim in respect thereof is to be made against an
indemnifying party under such subsection, notify the indemnifying party in
writing of the commencement thereof; but the omission so to notify the
indemnifying party shall not relieve it from any liability which it may have to
any indemnified party otherwise than under such subsection.  In case any such
action shall be brought against any indemnified party and it has notified the
indemnifying party of the commencement thereof, the indemnifying party shall be
entitled to participate therein and, to the extent that it may wish, jointly
with any other indemnifying party similarly notified, to assume the defense
thereof, with counsel satisfactory to such indemnified party (who shall not,
except with the consent of the indemnified party, be counsel to the
indemnifying party), and, after notice from the indemnifying party to such
indemnified party of its election to assume the defense thereof, the
indemnifying party shall not be liable to such indemnified party under such
subsection for any legal expenses of other counsel or any other expenses, in
each case subsequently incurred by such indemnified party, in connection with
the defense thereof other than reasonable costs of investigation.  No
indemnifying party shall, without the written consent of the indemnified party,
effect the settlement or compromise of, or consent to the entry of any judgment
with respect to, any pending or threatened action or claim in respect of which
indemnification or contribution may be sought hereunder unless such settlement,
compromise or judgment (i) includes an unconditional release of the indemnified
party from all liability arising out of such action or claim and (ii) does not
include a statement as to, or an admission of, fault, culpability or a failure
to act, by or on behalf of any indemnified party.
        
     (d) If the indemnification provided for in this Section 8 is unavailable
or insufficient to hold harmless an indemnified party under subsections (a) or
(b) above in respect of any losses, claims, damages or liabilities (or actions
in respect thereof) referred to therein, then each indemnifying party shall
contribute to the amount paid or payable by such indemnified party as 

                                     14

<PAGE>   15


a result of such losses, claims, damages or liabilities (or actions in respect
thereof) such proportion as is appropriate to reflect the relative benefits
received by the Company on the one hand and the Underwriters on the other from
the offering of the Shares.  If, however, the allocation provided for by the
immediately preceding sentence is not permitted by applicable law or if the
indemnified party failed to give the notice required under subsection (c)
above, then each indemnifying party shall contribute to such amount paid or
payable by such indemnified party in such proportion as is appropriate to
reflect not only such relative benefits but also the relative fault of the
Company on the one hand and the Underwriters on the other in connection with
the statements or omissions which resulted in such losses, claims, damages or
abilities (or actions in respect thereof), as well as any other relevant
equitable considerations.  The relative benefits received by the Company on the
one hand and the Underwriters on the other shall be deemed to be in the same
proportion the total net proceeds from the offering (before deducting expenses)
received by the Company bear to the total underwriting commissions received by
the Underwriters, in each case as set forth in the table on the cover page of
the Prospectus.  The relative fault shall be determined by reference to, among
other things, whether the untrue or alleged untrue statement of a material fact
or the omission or alleged omission to state a material fact relates to
information supplied by the Company on the one hand or the Underwriters on the
other and the parties' relative intent, knowledge, access to information and
opportunity to correct or prevent such statement or omission.  The Company and
the Underwriters agree that it would not be just and equitable if contributions
pursuant to this section (d) were determined by pro rata allocation (even if
the Underwriters are treated as one entity for such purpose) or by any other
method of allocation which does not take account of the equitable
considerations referred to above in this subsection (d).  The amount paid or
payable by an indemnified party as a result of the losses, claims, damages or
liabilities (or actions in respect thereof) referred to above in this
subsection (d) shall be deemed to include any legal or other expenses
reasonably incurred by such indemnified party in connection with investigating
or defending any such action or claim.  Notwithstanding the provisions of this
subsection (d), no Underwriter shall be required to contribute any amount in
excess of the amount by which the total price at which the Shares underwritten
by it and distributed to the public were offered to the public exceeds the
amount of any damages which such Underwriter has otherwise been required to pay
by reason of such untrue or alleged untrue statement or omission or alleged
omission.  No person guilty of fraudulent misrepresentation (within the meaning
of Section 11(f) of the Act) shall be entitled to contribution from any person
who was not guilty of such fraudulent misrepresentation.  The Underwriters'
obligations in this subsection (d) to contribute are several in proportion to
their respective underwriting obligations and not joint.
        
     (e) The obligations of the Company under this Section 8 shall be in
addition to any liability which the Company may otherwise have and shall
extend, upon the same terms and conditions, to each person, if any, who
controls any Underwriter within the meaning of the Act; and the obligations of
the Underwriters under this Section 8 shall be in addition to any liability
which the respective Underwriters may otherwise have and shall extend, upon the
same terms and conditions, to each officer and director of the Company and to
each person, if any, who controls the Company within the meaning of the Act.

                                     15

<PAGE>   16

     9. (a) If any Underwriter shall default in its obligation to purchase the
Shares which it has agreed to purchase hereunder at a Time of Delivery, you may
in your discretion arrange for you or another party or other parties to
purchase such Shares on the terms contained herein.  If within 36 hours after
such default by any Underwriter you do not arrange for the purchase of such
Shares, then the Company shall be entitled to a further period of 36 hours
within which to procure another party or other parties satisfactory to you to
purchase such Shares on such terms.  In the event that, within the respective
prescribed periods, you notify the Company that you have so arranged for the
purchase of such Shares, or the Company notifies you that it has so arranged
for the purchase of such Shares, you or the Company shall have the right to
postpone such Time of Delivery for a period of not more than seven days, in
order to effect whatever changes may thereby be made necessary in the
Registration Statement or the Prospectus, or in any other documents or
arrangements, and the Company agrees to file promptly any amendments to the
Registration Statement or the Prospectus which in your opinion may thereby be
made necessary.  The term "Underwriter" as used in this Agreement shall include
any person substituted under this Section with like effect as if such person
had originally been a party to this Agreement with respect to such Shares.

     (b) If, after giving effect to any arrangements for the purchase of the
Shares of a defaulting Underwriter or Underwriters by you and the Company as
provided in subsection (a) above, the aggregate number of such Shares which
remains unpurchased does not exceed one-tenth of the aggregate number of all
the Shares to be purchased at such Time of Delivery, then the Company shall
have the right to require each non-defaulting Underwriter to purchase the
number of shares which such Underwriter agreed to purchase hereunder at such
Time of Delivery and, in addition, to require each non-defaulting Underwriter
to purchase its pro rata share (based on the number of Shares which such
Underwriter agreed to purchase hereunder) of the Shares of such defaulting
Underwriter or Underwriters for which such arrangements have not been made, but
nothing herein shall relieve a defaulting Underwriter from liability for its
default.

     (c) If, after giving effect to any arrangements for the purchase of the
Shares of a defaulting Underwriter or Underwriters by you and the Company as
provided in subsection (a) above, the aggregate number of such Shares which
remains unpurchased exceeds one-tenth of the aggregate number of all the Shares
to be purchased at such Time of Delivery, or if the Company shall not exercise
the right described in subsection (b) above to require non-defaulting
Underwriters to purchase Shares of a defaulting Underwriter or Underwriters,
then this Agreement (or, with respect to the Second Time of Delivery, the
obligations of the Underwriters to purchase and of the Company to sell the
Optional Shares) shall thereupon terminate, without liability on the part of
any non-defaulting Underwriter or, the Company, except for the expenses to be
borne by the Company and the Underwriters as provided in Section 6 hereof and
the indemnity and contribution agreements in Section 8 hereof; but nothing
herein shall relieve a defaulting Underwriter from liability for its default.

     10. The respective indemnities, agreements, representations, warranties
and other statements of the Company and the several Underwriters, as set forth
in this Agreement or made by or on behalf of them, respectively, pursuant to
this Agreement, shall remain in full force and 

                                     16

<PAGE>   17

effect, regardless of any investigation (or any statement as to the results
thereof) made by or on behalf of any Underwriter or any controlling person of
any Underwriter, or the Company, or any officer or director or controlling
person of the Company, and shall survive delivery of and payment for the
Shares.
        
     11. If this Agreement shall be terminated pursuant to Section 9 hereof,
the Company shall not then be under any liability to any Underwriter except as
provided in Sections 6 and 8 hereof; but, if for any other reason, any Shares
are not delivered by or on behalf of the Company as provided herein, the
Company will reimburse the Underwriters through you for all out-of-pocket
expenses approved in writing by you, including fees and disbursements of
counsel, reasonably incurred by the Underwriters in making preparations for the
purchase, sale and delivery of the Shares not so delivered, but the Company
shall then be under no further liability to any Underwriter except as provided
in Sections 6 and 8 hereof.

     12. In all dealings hereunder, you shall act on behalf of each of the
Underwriters, and the parties hereto shall be entitled to act and rely upon any
statement, request, notice or agreement on behalf of any Underwriter made or
given by you.

     All statements, requests, notices and agreements hereunder shall be in
writing, and if to the Underwriters shall be delivered or sent by mail, telex
or facsimile transmission to Roney at One Griswold, Detroit, Michigan 48226,
Attention Syndicate Department; and if to the Company shall be delivered or
sent by mail to the address of the Company, respectively set forth in the
Registration Statement, Attention: _____________________; provided, however,
that any notice to an Underwriter pursuant to Section 8(c) hereof shall be
delivered or sent by mail, telex or facsimile transmission to such Underwriter
at its address set forth in its Underwriters' Questionnaire, or telex
constituting such Questionnaire, which address will be supplied to the Company
by you upon request.  Any such statements, requests, notices or agreements
shall take effect upon receipt thereof.

     13. This Agreement shall be binding upon, and inure solely to the benefit
of, the Underwriters and the Company, and, to the extent provided in Sections 8
and 10 hereof,  the officers and directors of the Company, and each person who
controls the Company or any Underwriter, and their respective heirs, executors,
administrators, successors and assigns, and no other person shall acquire or
have any right under or by virtue of this Agreement.  No purchaser of any of
the Shares from any Underwriter shall be deemed a successor or assign by reason
merely of such purchase.

     14. As used herein, the term "business day" shall mean any day when the
Commission's office in Washington, D.C. is open for business.

     15. This Agreement shall be governed by and construed in accordance with
the laws of the State of Michigan.


                                     17

<PAGE>   18

     16. This Agreement may be executed by any one or more of the parties
hereto in any number of counterparts, each of which shall be deemed to be an
original, but all such counterparts shall together constitute one and the same
instrument.

     If the foregoing is in accordance with your understanding, please sign and
return to us one counterpart for the Company plus one for each counsel thereof,
and upon the acceptance hereof by you, on behalf of each of the Underwriters,
this letter and such acceptance hereof shall constitute a binding agreement
between each of the Underwriters and the Company.  It is understood that your
acceptance of this letter on behalf of each of the Underwriters is pursuant to
the authority set forth in a form of Agreement among Underwriters, the form of
which shall be submitted to the Company for examination upon request, but
without warranty on your part as to the authority of the signers thereof.

                                Very truly yours,

                                Bioanalytical Systems, Inc.


                                By:____________________________________
                                        Name:
                                        Title:


Accepted as of the date hereof:
Roney & Co., L.L.C.



By:_________________________
     Name:
     Title:


The Ohio Company


By:_________________________
     Name:
     Title:


                                     18

<PAGE>   19



                                 SCHEDULE I


<TABLE>
<CAPTION>
                                                                     Number of Optional
                                                                        Shares to be
                                                    Total Number of     Purchased if
                                                     Shares to be      Maximum Option
                 Underwriter                        Purchased        Exercised
                 --------------                     --------------   ----------------
<S>                                                 <C>              <C>

Roney & Co, L.L.C. . . . . . . . . . . . . . . . .
The Ohio Company . . . . . . . . . . . . . . . . .

                                                    _________           _________
        Total                                       1,500,000             225,000
</TABLE>



                                      19


<PAGE>   20


                                                                         ANNEX I



                                                                     ANNEX 1 (a)
                                                                     ANNEX 1 (b)









<PAGE>   21


                                                                        ANNEX II


                           FORM OF LOCK-UP AGREEMENT






<PAGE>   1
                                                                  EXHIBIT 3.1


                                 SECOND RESTATED

                            ARTICLES OF INCORPORATION

                                       OF

                           BIOANALYTICAL SYSTEMS, INC.



         This corporation ("Corporation") is governed by the applicable
provisions of the Indiana Business Corporation Law ("Act").

                                    ARTICLE I

                                      Name

           The name of the Corporation is Bioanalytical Systems, Inc.

                                   ARTICLE II

                                     Shares

         Section 2.1.  Number.  The total number of shares which the Corporation
is authorized to issue is 20 million shares.

         Section 2.2. Classes. There shall be two classes of shares of the
Corporation. One class shall be designated as "Common Shares" and shall consist
of 19 million of the authorized shares, and the other class shall be designated
as "Preferred Shares", and shall consist of one million of the authorized
shares.

         Section 2.3. Relative Rights, Preferences, Limitations and Restrictions
of Shares.

         (a) Common Shares. Except to the extent granted to the Preferred
Shares, the Common Shares shall have all of the rights accorded to shares under
the Act including but not limited to voting rights and all rights to
distribution of the net assets of the Corporation upon dissolution.

         (b) Preferred Shares. By amendment of these Second Restated Articles of
Incorporation in the manner provided in the Act, the Preferred Shares shall have
such preferences, limitations, restrictions and relative voting and other rights
as may be determined, in whole or in part, by the Board of Directors prior to
the issuance thereof.


                                                    
<PAGE>   2



         Section 2.4. Voting Rights of Common Shares. Each holder of Common
Shares shall be entitled to one vote for each share owned of record on the books
of the Corporation on each matter submitted to a vote of the holders of Common
Shares.

                                   ARTICLE III

                     Registered Office and Registered Agent

         Section 3.1. Registered Office. The street address of the Corporation's
registered office is 2701 Kent Avenue, West Lafayette, Indiana 47906.

         Section 3.2. Registered Agent. The name of the Corporation's registered
agent at such registered office is Peter T. Kissinger.

                                   ARTICLE IV

                               Board of Directors

         Section 4.1. Number, Terms. The total number of directors shall be that
specified in or fixed in accordance with these Second Restated Articles of
Incorporation or in the By-Laws. In the absence of a provision in the By-Laws
specifying the number of directors or setting forth the manner in which such
number shall be fixed, the number of directors shall be nine. The By-Laws may
provide for staggering the terms of directors into two or three groups in the
manner provided in the Act.

         Section 4.2. Election by Voting Groups. The terms of Preferred Shares
may provide for the election of one or more directors by the holders of Common
Shares and/or by the holders of one or more series of Preferred Shares.

         Section 4.3. Removal of Directors. One or more directors may be removed
with or without cause by the vote of the holders of a majority of the
outstanding Common Shares, subject to any limitation on the removal of directors
contained in the terms of Preferred Shares.

                                    ARTICLE V

                                 Indemnification

         Section 5.1. General. The Corporation shall, to the fullest extent to
which it is empowered to do so by the Act, or any other applicable law, as from
time to time in effect, indemnify any person who was or is a party, or is
threatened to be made a party, to any threatened, pending or completed action,
suit or proceeding, whether civil, criminal, administrative or investigative and
whether formal or informal, by reason of the fact that he or she is or was a
Director, Officer, employee or agent of the Corporation, or who, while serving
as such Director, Officer, employee or agent of the Corporation, is or was
serving at the request

                                      - 2 -

<PAGE>   3



of the Corporation as a director, officer, partner, trustee, employee or agent
of another corporation, partnership, joint venture, trust, employee benefit plan
or other enterprise, whether for profit or not, against expenses (including
counsel fees), judgments, settlements, penalties and fines (including excise
taxes assessed with respect to employee benefit plans) actually or reasonably
incurred by him in accordance with such action, suit or proceeding, if he acted
in good faith and in a manner he reasonably believed, in the case of conduct in
his official capacity, was in the best interests of the Corporation, and in all
other cases, was not opposed to the best interests of the Corporation, and, with
respect to any criminal action or proceeding, he either had reasonable cause to
believe his conduct was lawful or no reasonable cause to believe his conduct was
unlawful. The termination of any action, suit or proceeding by judgment, order,
settlement or conviction, or upon a plea of nolo contendere or its equivalent,
shall not, of itself, create a presumption that the person did not meet the
prescribed standard of conduct.

         Section 5.2. Authorization of Indemnification. To the extent that a
Director, Officer, employee or agent of the Corporation has been successful, on
the merits or otherwise, in the defense of any action, suit or proceeding
referred to in Section 5.1 of this Article V, or in the defense of any claim,
issue or matter therein, the Corporation shall indemnify that person against
expenses (including counsel fees) actually and reasonably incurred by that
person in connection therewith. Any other indemnification under Section 5.1 of
this Article V (unless ordered by a court) shall be made by the Corporation only
as authorized in the specific case, upon a determination that indemnification of
the Director, Officer, employee or agent is permissible in the circumstances
because he has met the applicable standard of conduct. Such determination shall
be made (a) by the Board of Directors by a majority vote of a quorum consisting
of Directors who were not at the time parties to such action, suit or
proceeding; or (b) if a quorum cannot be obtained under subdivision (a), by a
majority vote of a committee duly designated by the Board of Directors (in which
designation Directors who are parties may participate), consisting solely of two
(2) or more Directors not at the time parties to such action, suit or
proceeding; or (c) by special legal counsel: (i) selected by the Board of
Directors or its committee in the manner prescribed in subdivision (a) or (b),
or (ii) if a quorum of the Board of Directors cannot be obtained under
subdivision (a) and a committee cannot be designated under subdivision (b),
selected by a majority vote of the full Board of Directors (in which selection
Directors who are parties may participate), or (iii) by the Shareholders, but
shares owned by or voted under the control of Directors who are at the time
parties to such action, suit or proceeding may not be voted on the
determination.

         Authorization of indemnification and evaluation as to reasonableness of
expenses shall be made in the same manner as the determination that
indemnification is permissible, except that if the determination is made by
special legal counsel, authorization of indemnification and evaluation as to
reasonableness of expenses shall be made by those entitled under subdivision (c)
to select counsel.

         Section 5.3.  Good Faith  Defined.  For  purposes of any  determination
under  Section 5.1 of this  Article V, a person shall be deemed to have acted in
good faith and to have otherwise met

                                     - 3 -

<PAGE>   4



the applicable standard of conduct set forth in Section 5.1 if his action is
based on information, opinions, reports or statements, including financial
statements and other financial data, if prepared or presented by (a) one or more
Officers or employees of the Corporation or another enterprise whom he
reasonably believes to be reliable and competent in the matters presented; (b)
legal counsel, public accountants, appraisers or other persons as to matters he
reasonably believes are within the person's professional or expert competence;
or (c) a committee of the Board of Directors of the Corporation or another
enterprise of which the person is not a member if he reasonably believes the
committee merits confidence. The term "another enterprise" as used in this
Section 5.3 shall mean any other corporation or any partnership, joint venture,
trust, employee benefit plan or other enterprise of which the person is or was
serving at the request of the Corporation as a director, officer, partner,
trustee, employee or agent. The provisions of this Section 5.3 shall not be
deemed to be exclusive or to limit in any way the circumstances in which a
person may be deemed to have met the applicable standards of conduct set forth
in Section 5.1 of this Article V.

         Section 5.4. Payment of Expenses in Advance. Expenses incurred in
connection with any civil or criminal action, suit or proceeding may be paid for
or reimbursed by the Corporation in advance of the final disposition of such
action, suit or proceeding, as authorized in the specific case in the same
manner described in Section 5.2 of this Article V, upon receipt of a written
affirmation of the Director, Officer, employee or agent's good faith belief that
he has met the standard of conduct described in Section 5.1 of this Article V
and upon receipt of a written undertaking by or on behalf of the Director,
Officer, employee or agent to repay such amount if it shall ultimately be
determined that he did not meet the standard of conduct set forth in Section 5.1
of this Article V, and a determination is made that the facts then known to
those making the determination would not preclude indemnification under this
Article V.

         Section 5.5. Provisions Not Exclusive. The indemnification provided by
this Article V shall not be deemed exclusive of any other rights to which a
person seeking indemnification may be entitled under these Articles, the
Corporation's Amended and Restated Bylaws, any resolution of the Board of
Directors or Shareholders, any other authorization, whenever adopted, after
notice, by a majority vote of all voting stock then outstanding, or any
contract, both as to action in his official capacity and as to action in another
capacity while holding that office, and shall continue as to a person who has
ceased to be a Director, Officer, employee or agent, and shall inure to the
benefit of the heirs, executors and administrators of that person.

         Section 5.6. Vested Right to Indemnification. The right of any
individual to indemnification under this Article V shall vest at the time of
occurrence or performance of any event, act or omission giving rise to any
action, suit or proceeding of the nature referred to in Section 5.1 of this
Article V and, once vested, shall not later be impaired as a result of any
amendment, repeal, alteration or other modification of any or all of these
provisions. Notwithstanding the foregoing, the indemnification afforded under
this Article V shall be applicable to all alleged prior acts or omissions of any
individual seeking indemnification hereunder, regardless of the fact that such
alleged acts or omissions may have occurred prior to

                                      - 4 -

<PAGE>   5


the adoption of this Article V. To the extent such prior acts or omissions
cannot be deemed to be covered by this Article V, the right of any individual to
indemnification shall be governed by the indemnification provisions in effect at
the time of the prior acts or omissions.

         Section 5.7. Insurance. The Corporation may purchase and maintain
insurance on behalf of any person who is or was a Director, Officer, employee or
agent of the Corporation, or who is or was serving at the request of the
Corporation as a director, officer, partner, trustee, employee or agent of
another corporation, partnership, joint venture, trust, employee benefit plan or
other enterprise, against any liability asserted against or incurred by the
individual in that capacity or arising from the individual's status as a
Director, Officer, employee or agent, whether or not the Corporation would have
power to indemnify the individual against the same liability under this Article
V.

         Section 5.8. Additional Definitions. For purposes of this Article V,
references to the "Corporation" shall include any domestic or foreign
predecessor entity of the Corporation in a merger or other transaction in which
the predecessor's existence ceased upon consummation of the transaction.

         For purposes of this Article V, "serving an employee benefit plan at
the request of the Corporation" shall include any service as a Director,
Officer, employee or agent of the Corporation which imposes duties on, or
involves services by that Director, Officer, employee, or agent with respect to
an employee benefit plan, its participants, or beneficiaries. A person who acted
in good faith and in a manner he reasonably believed to be in the best interests
of the participants and beneficiaries of an employee benefit plan shall be
deemed to have acted in a manner "not opposed to the best interest of the
Corporation" referred to in this Article V.

         For purposes of this Article V, "party" includes any individual who is
or was a plaintiff, defendant or respondent in any action, suit or proceeding,
or who is threatened to be made a named defendant or respondent in any action,
suit or proceeding.

         For purposes of this Article V, "official capacity," when used with
respect to a Director, shall mean the position of director of the Corporation;
and when used with respect to an individual other than a Director, shall mean
the office in the Corporation held by the Officer or the employment or agency
relationship undertaken by the employee or agent on behalf of the Corporation.

         "Official capacity" does not include service for any other foreign or
domestic corporation or any partnership, joint venture, trust, employee benefit
plan, or other enterprise, whether for profit or not.

         Section 5.9. Payments a Business Expense. Any payments made to any
indemnified party under this Article V under any other right to indemnification
shall be deemed to be an ordinary and necessary business expense of the
Corporation, and payment thereof shall not subject any person responsible for
the payment, or the Board of Directors, to any action for corporate waste or to
any similar action. 

                                      - 5 -


<PAGE>   1
                                                                    EXHIBIT 3.2

                            SECOND RESTATED BYLAWS OF
                           BIOANALYTICAL SYSTEMS, INC.


                                    ARTICLE I

                      RECORDS PERTAINING TO SHARE OWNERSHIP

         Section 1. Recognition of  Shareholders.  Bioanalytical  Systems,  Inc.
(the "Corporation") is entitled to recognize a person registered on its books as
the owner of shares of the  Corporation as having the exclusive right to receive
dividends and to vote those shares, notwithstanding any other person's equitable
or other claim to, or interest in, those shares.

         Section 2. Transfer of Shares. Shares are transferable only on the
books of the Corporation, subject to any transfer restrictions imposed by the
Articles of Incorporation, these Bylaws, or an agreement among shareholders and
the Corporation. Shares may be so transferred upon presentation of the
certificate representing the shares, endorsed by the appropriate person or
persons, and accompanied by (a) reasonable assurance that those endorsements are
genuine and effective, and (b) a request to register the transfer. Transfers of
shares are otherwise subject to the provisions of the Indiana Business
Corporation Law (the "Act"), Article 8 of the Indiana Uniform Commercial Code
and federal securities laws.

         Section 3. Certificates. Each shareholder is entitled to a certificate
signed (manually or in facsimile) by the President or a Vice President and the
Secretary or an Assistant Secretary, setting forth (a) the name of the
Corporation and that it was organized under Indiana law, (b) the name of the
person to whom issued, (c) the number, class, and series of shares represented,
and (d) a conspicuous statement that the Corporation will furnish to the holder
of the certificate on request, in writing, and without charge, a summary of the
designations, relative rights, preferences, and limitations applicable to each
such class of shares, and the variations in rights, preferences, and limitations
determined for each series within a class (and the authority of the Board of
Directors to determine variations for future series). The Board of Directors
shall prescribe the form of the certificate.

         Section 4. Lost or Destroyed Certificates. A new certificate may be
issued to replace a lost or destroyed certificate. Unless waived by the Board of
Directors, the shareholder in whose name the certificate was issued shall make
an affidavit or affirmation of the fact that the certificate is lost or
destroyed, shall advertise the loss or destruction in such manner as the Board
of Directors may require, and shall give the Corporation a bond of indemnity in
the amount and form which the Board of Directors may prescribe.




<PAGE>   2
                                   ARTICLE II

                          MEETINGS OF THE SHAREHOLDERS

         Section 1. Annual Meetings.  Annual meetings of the shareholders  shall
be held on the second  Monday in February of each year, or on such other date as
may be designated by the Board of Directors.

         Section 2. Special Meetings. Special meetings of the shareholders may
be called by the President or by the Board of Directors. Special meetings of the
shareholders shall be called upon delivery to the Secretary of the Corporation
of one or more written demands for a special meeting of the shareholders
describing the purposes of that meeting and signed and dated by the holders of
at least 25% of all the votes entitled to be cast on any issue proposed to be
considered at that meeting.

         Section 3. Notice of Meetings. The Corporation shall deliver or mail
written notice stating the date, time, and place of any shareholders' meeting
and, in the case of a special shareholders' meeting or when otherwise required
by law, a description of the purposes for which the meeting is called, to each
shareholder of record entitled to vote at the meeting, at such address as
appears in the records of the Corporation and at least 10, but no more than 60,
days before the date of the meeting.

         Section 4. Waiver of Notice. A shareholder may waive notice of any
meeting, before or after the date and time of the meeting as stated in the
notice, by delivering a signed waiver to the Corporation for inclusion in the
minutes. A shareholder's attendance at any meeting, in person or by proxy (a)
waives objection to lack of notice or defective notice of the meeting, unless
the shareholder at the beginning of the meeting objects to holding the meeting
or transacting business at the meeting, and (b) waives objection to
consideration of a particular matter at the meeting that is not within the
purposes described in the meeting notice, unless the shareholder objects to
considering the matter when it is presented.

         Section 5. Record Date. The Board of Directors may fix a record date,
which may be a future date, for the purpose of determining the shareholders
entitled to notice of a shareholders' meeting, to demand a special meeting, to
vote, or to take any other action. A record date shall be at least 10, but not
more than 70, days before the meeting or action requiring a determination of
shareholders. If the Board of Directors does not fix a-record date, the record
date shall be the 10th day prior to the date of the meeting or other action.

         Section 6. Voting by Proxy. A shareholder may appoint a proxy to vote
or otherwise act for the shareholder pursuant to a written appointment form
executed by the shareholder or the shareholder's duly authorized
attorney-in-fact. An appointment of a proxy is effective when received by the
Secretary or other officer or agent of the Corporation authorized to tabulate
votes. The general proxy of a fiduciary is given the same effect as the general
proxy of any other

                                      - 2 -

<PAGE>   3
shareholder.  A proxy  appointment  is  valid  for 11  months  unless  otherwise
expressly stated in the appointment form.

         Section 7. Voting Lists. Following the record date for a shareholders'
meeting, the Secretary shall prepare an alphabetical list of all shareholders
entitled to notice of the meeting, arranged by voting group and within each
voting group by class and series, and showing the address and number of shares
held by each shareholder. The list shall be kept on file at the principal office
of the Corporation or at a place identified in the meeting notice in the city
where the meeting will be held. The list shall be available for inspection and
copying by any shareholder entitled to vote at the meeting, or by the
shareholder's agent or attorney authorized in writing, at any time during
regular business hours, beginning 5 business days before the date of the meeting
through the meeting. The list shall also be made available to any shareholder,
or to the shareholder's agent or attorney authorized in writing, at the meeting
and any adjournment thereof. Failure to prepare or make available a voting list
with respect to any shareholder's meeting shall not affect the validity of any
action taken at such meeting.

         Section 8. Quorum; Approval. At any meeting of shareholders, a majority
of the votes entitled to be cast on a matter by a voting group at the meeting
constitutes a quorum of that voting group. If a quorum of a voting group is
present when a vote is taken, action on a matter is approved by that voting
group if the votes cast in favor of the action exceed the votes cast in
opposition to the action, unless a greater number is required by law, the
Articles of Incorporation, or these Bylaws. If more than one voting group is
entitled to vote on a matter, approval by each voting group is required for the
matter to be approved by the shareholders as a whole.

         Section 9. Action by Consent. Any action required or permitted to be
taken at a shareholders' meeting may be taken without a meeting if the action is
taken by all the shareholders entitled to vote on the action. The action must be
evidenced by one or more written consents describing the action taken, signed by
all the shareholders entitled to vote on the action, and delivered to the
Corporation for inclusion in the minutes. If not otherwise determined pursuant
to Section 5 of this Article II, the record date for determining shareholders
entitled to take action without a meeting is the date the first shareholder
signs the consent to such action.

         Section 10. Presence. Any or all shareholders may participate in any
annual or special shareholders' meeting by, or through the use of, any means of
communication by which all shareholders participating may simultaneously hear
each other during the meeting. A shareholder so participating is deemed to be
present in person at the meeting.


                                      - 3 -

<PAGE>   4
                                   ARTICLE III

                               BOARD OF DIRECTORS

         Section 1. Powers and Duties. All corporate powers are exercised by or
under the authority of, and the business and affairs of the Corporation are
managed under the direction of, the Board of Directors, unless otherwise
provided in the Articles of Incorporation.

         Section 2. Number and Terms of Office; Qualifications. The Corporation
shall have no fewer than seven and no greater than nine directors. Subject to
the limitations contained in this Section 2, the number of directors may be
fixed or changed from time to time by a majority vote of the Board of Directors.
Directors are elected at each annual shareholders' meeting and serve for a term
expiring at the following annual shareholders' meeting. A director who has been
removed pursuant to Section 3 of this Article III ceases to serve immediately
upon removal; otherwise, a director whose term has expired continues to serve
until a successor is elected and qualifies or until there is a decrease in the
number of directors. A person need not be a shareholder or an Indiana resident
to qualify to be a director.

         Section 3. Removal. Subject to any limitations on, and requirements
for, removal of directors contained in the Articles of Incorporation, any
director may be removed with or without cause by action of the shareholders
taken at any meeting the notice of which states that one of the purposes of the
meeting is removal of the director.

         Section 4. Vacancies. Subject to any provisions concerning the filling
of vacancies contained in the Articles of Incorporation, if a vacancy occurs on
the Board of Directors, including a vacancy resulting from an increase in the
number of directors, the Board of Directors may fill the vacancy; and if the
directors remaining in office constitute fewer than a quorum of the Board, the
directors remaining in office may fill the vacancy by the affirmative vote of a
majority of those directors. Any director elected to fill a vacancy holds office
until the next annual meeting of the shareholders and/or until a successor is
elected and qualifies.

         Section 5. Annual Meetings. Unless otherwise agreed by the Board of
Directors, the annual meeting of the Board of Directors shall be held
immediately following the annual meeting of the shareholders, at the place where
the meeting of shareholders was held, for the purpose of electing officers and
considering any other business which may be specifically set forth in the notice
of the meeting.

         Section 6. Regular and Special Meetings. Regular meetings of the Board
of Directors may be held pursuant to a resolution of the Board of Directors
establishing a method for determining the date, time, and place of those
meetings. Special meetings of the Board of Directors may be held upon the call
of the President or of any one director.


                                      - 4 -

<PAGE>   5



         Section 7. Notice and Agenda. Notice of a meeting may be waived in
writing before or after the time of the meeting. The waiver must be signed by
the director entitled to the notice and filed with the minutes of the meeting. A
director's attendance at or participation in a meeting waives any required
notice of the meeting, unless at the beginning of the meeting (or promptly upon
the director's arrival) the director objects to holding the meeting or
transacting business at the meeting and does not thereafter vote for or assent
to action taken at the meeting. All notices of a meeting of the Board of
Directors shall include an agenda specifically setting forth in reasonable
detail any and all matters to be officially acted upon at such meeting.

         Section 8. Quorum. A quorum for the transaction of business at any
meeting of the Board of Directors consists of a majority of the number of
directors then in office. In all cases, except as otherwise expressly required
by the Act or the Articles of Incorporation, the approval or consent of a
majority of the directors then in office shall be required in order to authorize
or approve actions or other matters presented to the Board of Directors.

         Section 9. Action by Consent. Any action required or permitted to be
taken at any meeting of the Board of Directors may be taken without a meeting if
the action is taken by all directors then in office. The action must be
evidenced by one or more written consents describing the action taken, signed by
each director, and included in the minutes. Action of the Board of Directors
taken by consent is effective when the last director signs the consent, unless
the consent specifies a prior or subsequent effective date.

         Section 10. Committees. The Board of Directors may create one or more
committees and appoint members of the Board of Directors to serve on them. Each
committee may have one or more members, who serve at the pleasure of the Board
of Directors. All rules applicable to action by the Board of Directors apply to
committees and their members. The Board of Directors may specify the authority
that a committee may exercise; however, a committee may not (a) authorize
distributions, except a committee may authorize or approve a reacquisition of
shares if done according to a formula or method prescribed by the Board of
Directors, (b) approve or propose to shareholders action that must be approved
by shareholders, (c) fill vacancies on the Board of Directors or on any of its
committees, (d) amend the Articles of Incorporation, (e) adopt, amend, or repeal
these Bylaws, (f) approve a plan of merger not requiring shareholder approval,
or (g) authorize or approve the issuance or sale or a contract for the sale of
shares, or determine the designation and relative rights, preferences, and
limitations of a class or series of shares.

         Section 11. Presence. The Board of Directors may permit any or all
directors to participate in any annual, regular, or special meeting by any means
of communication by which all directors participating may simultaneously hear
each other during the meeting. A director so participating is deemed to be
present in person at the meeting.

         Section 12. Compensation. Each director shall receive such compensation
for service as a director as may be fixed by the Board of Directors.

                                      - 5 -

<PAGE>   6
                                   ARTICLE IV

                                    OFFICERS

         Section 1. Officers.  The  Corporation  shall have a President,  a Vice
President, a Secretary, a Treasurer, and such assistant officers as the Board of
Directors or the President  designates.  The same individual may  simultaneously
hold more than one office.

         Section 2. Terms of Office. Officers are elected at each annual meeting
of the Board of Directors and serve for a term expiring at the following annual
meeting of the Board of Directors. An officer who has been removed pursuant to
Section 4 of this Article IV ceases to serve as an officer immediately upon
removal; otherwise, an officer whose term has expired continues to serve until a
successor is elected and qualifies.

         Section 3. Vacancies. If a vacancy occurs among the officers, the Board
of Directors may fill the vacancy. Any officer elected to fill a vacancy holds
office until the next annual meeting of the Board of Directors and until a
successor is elected and qualifies.

         Section  4.  Removal.  Any  officer  may be  removed  by the  Board  of
Directors at any time with or without cause.

         Section 5.  Compensation.  Each officer shall receive such compensation
for service in office as may be fixed by the Board of Directors.

         Section 6. President. The President is the chief executive officer of
the Corporation and is responsible for managing and supervising the affairs and
personnel of the Corporation, subject to the general control of the Board of
Directors. The President presides at all meetings of shareholders and directors.
The President, or proxies appointed by the President, may vote shares of other
corporations owned by the Corporation. The President has authority to execute,
with the Secretary, powers of attorney appointing other corporations,
partnerships, or individuals as the agents of the Corporation, subject to law,
the Articles of Incorporation, and these Bylaws. The President has such other
powers and duties as the Board of Directors may from time to time prescribe.

         Section 7. Vice President. The Vice President has all the powers of,
and performs all the duties incumbent upon, the President during the President's
absence or disability. The Vice President has such other powers and duties as
the Board of Directors may from time to time prescribe.

         Section 8.  Secretary.  The Secretary is responsible  for (a) attending
all meetings of the shareholders and the Board of Directors,  (b) preparing true
and complete minutes of the proceedings of all meetings of the shareholders, the
Board  of  Directors,  and  all  committees  of  the  Board  of  Directors,  (c)
maintaining and safeguarding the books (except books of account) and

                                      - 6 -

<PAGE>   7
records of the Corporation, and (d) authenticating the records of the
Corporation. If required, the Secretary attests the execution of deeds, leases,
agreements, powers of attorney, certificates representing shares of the
Corporation, and other official documents by the Corporation. The Secretary
serves all notices of the Corporation required by law, the Board of Directors,
or these Bylaws. The Secretary has such other duties as the Board of Directors
may from time to time prescribe.

         Section 9. Treasurer. The Treasurer is responsible for (a) keeping
correct and complete books of account which show accurately at all times the
financial condition of the Corporation, (b) safeguarding all funds, notes,
securities, and other valuables which may from time to time come into the
possession of the Corporation, and (c) depositing all funds of the Corporation
with such depositories as the Board of Directors shall designate. The Treasurer
shall furnish at meetings of the Board of Directors, or when otherwise
requested, a statement of the financial condition of the Corporation. The
Treasurer has such other duties as the Board of Directors may from time to time
prescribe.

         Section 10. Assistant Officer. The Board of Directors or the President
may from time to time designate and elect assistant officers who shall have such
powers and duties as the officers whom they are elected to assist specify and
delegate to them, and such other powers and duties as the Board of Directors or
the President may from time to time prescribe. An Assistant Secretary may,
during the absence or disability of the Secretary, discharge all
responsibilities imposed upon the Secretary of the Corporation, including,
without limitation, attest the execution of all documents by the Corporation.

                                    ARTICLE V

                                  MISCELLANEOUS

         Section 1. Records. The Corporation shall keep as permanent records
minutes of all meetings of the shareholders, the Board of Directors, and all
committees of the Board of Directors, and a record of all actions taken without
a meeting by the shareholders, the Board of Directors, and all committees of the
Board of Directors. The Corporation or its agent shall maintain a record of the
shareholders in a form that permits preparation of a list of the names and
addresses of all shareholders, in alphabetical order by class of shares showing
the number and class of shares held by each. The Corporation shall maintain its
records in written form or in a form capable of conversion into written form
within a reasonable time. The Corporation shall keep a copy of the following
records at its principal office: (a) the Articles of Incorporation then
currently in effect, (b) the Bylaws then currently in effect, (c) all
resolutions adopted by the Board of Directors with respect to one or more
classes or series of shares and fixing their relative rights, preferences, and
limitations, if shares issued pursuant to those resolutions are outstanding, (d)
minutes of all shareholders' meetings, and records of all actions taken by
shareholders without a meeting, for the past 3 years, (e) all written
communications to shareholders generally during the past 3 years, including
annual financial statements furnished upon request of the shareholders,

                                      - 7 -

<PAGE>   8


(f) a list of the names and business addresses of the current directors and
officers, and (g) the most recent annual report filed with the Indiana Secretary
of State.

         Section 2. Execution of Contracts and Other Documents. Unless otherwise
authorized or directed by the Board of Directors, all written contracts and
other documents entered into by the Corporation shall be executed on behalf of
the Corporation by the President or a Vice President, and, if required, attested
by the Secretary or an Assistant Secretary.

         Section 3.  Accounting  Year.  The accounting  year of the  Corporation
begins  on  October  l of each  year and ends on the  September  30  immediately
following.

         Section 4.        Corporate Seal.  The Corporation has no seal.

                                   ARTICLE VI

                                    AMENDMENT

         These Bylaws may be amended or repealed only by the Board of Directors.



                                            ------------------------------------
                                            Secretary's Initial



                                            ------------------------------------
                                            Date




                                      - 8 -


<PAGE>   1
                                                                   EXHIBIT 4.3

                           Bioanalytical Systems, Inc.
                                2701 Kent Avenue
                          West Lafayette, Indiana 47906



Primus Capital Fund II Limited Partnership
Suite 2700
One Cleveland Center
Cleveland, Ohio 44114
Attention: William C. Mulligan


Middlewest Ventures II, L.P.
20 North Meridian Street
Indianapolis, Indiana 46204
Attention: Thomas A. Hiatt


Dear Bill and Tom:

         As you are aware, Bioanalytical Systems, Inc. (the "Company") intends
to file a registration statement on Form S-1 for the purpose of registering an
aggregate of 1.8 million shares of its Common Shares for sale to the public (the
"Offering") through underwriters led by Roney & Co. L.L.C. and The Ohio Company
(the "Underwriters"). The Common Shares being registered include Common Shares
subject to an over-allotment option to be granted to the Underwriters. It is
anticipated that the registration statement will be filed with the Securities
and Exchange Commission on or about September 26, 1997, and that the Offering
will be made on or about November 25, 1997. I have enclosed a draft of the
registration statement and schedules showing the pro forma share capitalization
of the Company prior to and after giving effect to the Offering. It is
anticipated that the public offering price of the Common Shares will be between
$9 and $11 per share.

         This purpose of this letter is to confirm our agreement that:

         1. Effective immediately prior to the time of the closing of the
underwriting agreement to be entered into between the Company and the
Underwriters with respect to the Offering (the "Underwriting Agreement") and
without the necessity of any further action on your part or on the part of the
Company (other that those actions required to deliver to you the certificates
representing the Common Shares to which you will be entitled as a result of the
conversion of the Convertible Preferred Shares and the split of the Common
Shares contemplated in connection with the Offering):

         (a)      All of the Convertible Preferred Shares of the Company held by
                  each of Primus Capital Fund II Limited Partnership ("Primus")
                  and Middlewest Ventures II, L.P.


<PAGE>   2



                  ("Middlewest"), aggregating 104,167 and 62,500 shares,
                  respectively will be converted into Common Shares in
                  accordance with the terms set forth in Section 2.3(c) of the
                  Articles of Incorporation of the Company, as amended (the
                  "Preferred Share Terms"), and you as holders of Convertible
                  Preferred Shares shall not have any rights under the Preferred
                  Share Terms with respect to the transactions contemplated by
                  the Underwriting Agreement. Simultaneously with your execution
                  of this letter, you will deliver to the Company: (i) the
                  certificates representing the Convertible Preferred Shares,
                  (ii) written notice of conversion and (iii) a proper
                  assignment of the certificates to the Company, as contemplated
                  by Paragraph 5 of the Preferred Share Terms, to be held by the
                  Company in escrow pending the satisfaction of the conditions
                  to the conversion of the shares described herein or returned
                  to you if those conditions are not met. We hereby confirm to
                  you that, based upon the current share capitalization of the
                  Company, each outstanding Convertible Preferred Share is
                  convertible into one Common Share of the Company, based upon
                  the Preferred Share Terms.

         (b)      The Share Purchase  Agreement  between Primus,  Middlewest and
                  the Company  dated as of March 15, 1991,  shall be  terminated
                  and of no further force or effect; provided, however, that the
                  termination of the Share Purchase  Agreement  shall not affect
                  the rights of the parties  described in Exhibit E to the Share
                  Purchase  Agreement (a copy of which is attached  hereto) (the
                  "Registration Rights Agreement"), which shall continue in full
                  force  and  effect.  You  agree,  however,  that  you will not
                  exercise  your  rights  under  Section  1 of the  Registration
                  Rights  Agreement at any time prior to the  expiration  of the
                  period set forth in the lock-up agreement required pursuant to
                  the Underwriting Agreement and that you will not exercise your
                  rights under Section 2 of the  Registration  Rights  Agreement
                  with respect to the Offering.

         (c)      The  Shareholders  Agreement  between you and the  "Management
                  Shareholders" of the Company named therein,  dated as of March
                  15,  1991,  shall be  terminated  and of no  further  force or
                  effect.  The Company agrees that, for so long as either of you
                  hold  more  than 5% of the  outstanding  Common  Shares of the
                  Company,  it will use its best  efforts  to cause  one  person
                  designated by that shareholder to be nominated for election to
                  the Board of Directors of the Company upon the  expiration  of
                  the term of office of the directorships now held by you or any
                  successive term.  Consistent with the Company's past practice,
                  service on the Board would not entail  compensation beyond out
                  of pocket expenses.

         2. You will vote all of the Convertible Preferred Shares held by you in
favor of the approval of an amendment to the Articles of Incorporation of the
Company that, among other things, will (a) delete the current provisions of
Section 2.3(c) thereof, and (b) increase the number of authorized Preferred
Shares of the Company to 1,000,000 shares (the "Amended Articles of
Incorporation"). To that end, you hereby appoint Peter T. Kissinger and Ronald
E. Shoup, and either of them, with power of substitution, as your proxy and
agent with full power to attend any meeting

                                      - 2 -

<PAGE>   3



of shareholders of the Company and to vote on your behalf all of the Convertible
Preferred Shares outstanding in your names in favor of the approval of the
Amended Articles of Incorporation as described herein (or to execute a consent
to shareholder action in lieu of a meeting), and this proxy shall be deemed to
be coupled with an interest and shall not be subject to revocation by you
without the consent of the Company.

         3. You agree to execute the lock-up  agreement as required  pursuant to
the Underwriting Agreement.

         In the event that the Offering is not made on or before December 31,
1997, then your agreements set forth in paragraph 1 above shall terminate at the
close of business on that date. The Company agrees that the Amended Articles of
Incorporation described in paragraph 2 above shall not be filed with the
Secretary of State of Indiana and will not become effective until immediately
prior to the effective time of the closing of the Underwriting Agreement.

         If this letter correctly sets forth the terms of our agreements, I
would appreciate it if you would sign and return the copy provided for that
purpose, and the documents described in paragraph 1(a) above (forms of which are
provided herewith). Thank you for your cooperation in this matter.


                                       Very truly yours,

                                       Bioanalytical Systems, Inc.


                                           By:_______________________________
                                               Peter T. Kissinger, President

Accepted and agreed to:

Primus Capital Fund II, L.P.

By: Primus Management II, General Partner

By: Primus Venture Partners, General Partner



By:______________________________
                , General Partner

Date: ____________________, 1997


                                      - 3 -

<PAGE>   4



Middlewest Ventures II, L.P.

By: Middlewest Management Company, a General Partner



By:  _______________________________________
                           , General Partner

Date: ____________________, 1997


                                      - 4 -

<PAGE>   5



                                    EXHIBIT E


                          Registration of Common Shares

         1. Required Registration. At any time and from time to time, upon the
receipt by the Company from an Investor of a written request for the
registration of all or any portion of the Common Shares owned by such Investor,
the Company shall prepare and file within 60 days of receipt of such request a
registration statement under the Securities Act of 1933 (the "1933 Act")
covering the Common Shares which are subject to such request and shall use its
best efforts to cause such registration statement to become effective within 120
days of receipt of such request. The Investors shall be entitled to an unlimited
number of registrations under this Section l; provided, however, that the
Company shall not be required to bear the expense of more than one such
registration for all the Investors and the Investor making the request shall
bear the expense of any additional registrations. In the event that an Investor
determines for any reason not to proceed with a registration of Common Shares
requested pursuant to this Section l at any time before the registration
statement has been declared effective by the Securities and Exchange Commission
("SEC"), and such registration statement, if theretofore filed with the SEC, is
withdrawn with respect to the Common Shares covered thereby, and such Investor
agrees to bear its own expenses incurred in connection therewith and to
reimburse the Company for the expenses incurred by it attributable to the
registration of such Common Shares, then the Investors shall not be deemed to
have exercised their right to require the Company to register Common Shares
pursuant to this Section l at the expense of the Company. The Company shall not
effect any registration of its securities (other than on Forms S-4 or S-8, or
any successor or similar form) from the date of a request to register Common
Shares pursuant to this Section 1 until the earlier of (i) 90 days after the
date on which all securities covered by such registration statement have been
sold or (ii) 180 days after the effective date of such registration statement.

         2. Incidental Registration. Each time the Company shall determine to
proceed with the preparation and filing of a registration statement under the
1933 Act in connection with the proposed offer and sale for money of any of its
securities by the Company or any of its security holders (other than on Forms
S-4 or S-8, or any successor or similar form), the Company will give written
notice of its determination to the Investors and the other record holders of the
Common Shares. Upon the written request of an Investor or holder given to the
Company within 20 days after the mailing of any such notice by the Company as
provided in this Section 2, the Company shall, subject to Sections 5 and 9
hereof, cause all such Common Shares which such Investor or holder has requested
to be registered to be included in such registration statement. Neither the
delivery of a notice under this Section 2 nor a request by an Investor or holder
under this Section 2 shall, in any way, obligate the Company to file any
registration statement and notwithstanding the filing of a registration
statement, the Company may, at any time before the effective date thereof, elect
to terminate the entire registration process without any further obligation to
the Investors or record holders.

         3. Short Form  Registration.  In  addition to the  registration  rights
provided in Sections 1 and 2 hereof,  if the  Company  qualifies  for the use of
Form S-3 or any similar short form registration

                                      - 5 -

<PAGE>   6



then in force, the Company shall, at its expense, register Common Shares on
behalf of the Investors at the request of an Investor from time to time on such
form.

         4. Limitations. Notwithstanding the provisions of Sections l and 3
hereof, (i) the Company shall have the right to delay or suspend the preparation
and filing of a registration statement for up to 90 days if in the reasonable
judgment of a majority of the Board of Directors of the Company such preparation
or filing would harm or hinder in any material fashion the ability of the
Company to conduct its affairs or would have a material adverse effect on the
business, properties or financial condition of the Company, provided, that the
Company shall use its best efforts to cause any such registration statement to
become effective within 150 days of receipt of an Investor's request therefor;
and (ii) if, prior to an Investor's request for registration, the Company has
given notice under Section 2 hereof that it intends to prepare and file a
registration statement ("Section 2 Registration Statement"), then the Company
shall have the right to delay or suspend the filing of the registration
statement requested by an Investor, provided, that the Company shall use its
best efforts to cause any such registration statement requested by an Investor
to become effective within 90 days after the date on which all securities
covered by the Section 2 Registration Statement have been sold.

         5. Pro Ration. If Common Shares, including any Common Shares of the
Company to be issued and sold by it, are to be included under Sections 1, 2 or 3
above in a registration statement which pertains to one or more underwritten
public offerings and the managing underwriters advise the Company in writing
that in their opinion the number of Common Shares requested to be included
exceeds the number of Common Shares which can be sold in such offering, the
Company will include in such registration (i) first, such Common Shares as to
which demand registration rights have been exercised under Section 1 or 3, as
the case may be (the "Demand Shares"), on a pro rata basis among the holders of
Demand Shares based on the number of Common Shares with respect to which demand
is made; (ii) second, the Common Shares which the Company proposes to issue and
sell; and (iii) third, the number of Common Shares requested by the Investors
(to the extent their request was not pursuant to Section 1 or 3) to be included
which in the opinion of such underwriters can be sold (the "Secondary Shares"),
on a pro rata basis among holders of such Secondary Shares according to the
relation the number of Common Shares owned by any such holder bears to the total
number of Common Shares owned by all such holders (exclusive of Demand Shares in
each case).

         6. Registration Procedures.  If and whenever the Company is required by
the provisions of Sections 1, 2 or 3 to effect the registration of Common Shares
under the 1933 Act, the Company will:

         (a)      prepare and file with the SEC, within 60 days of receipt of an
                  Investor's request thereof or, a registration statement with
                  respect to such securities, and use its best efforts to cause
                  such registration statement to become effective within 120
                  days of receipt of such request and remain effective for such
                  period as may be reasonably necessary to effect the sale of
                  such securities, not to exceed six months;


                                      - 6 -

<PAGE>   7



         (b)      prepare and file with the SEC such amendments to such
                  registration statement and supplements to the prospectus
                  contained therein as may be necessary to keep such
                  registration statement effective until the earlier of (i) the
                  date on which all securities covered by such registration
                  statement have been sold and (ii) 180 days after the effective
                  date of such registration statement;

         (c)      use its best efforts to register or qualify the Common Shares
                  for sale under such other securities or blue sky laws of such
                  jurisdictions as the Investors may reasonably request and do
                  any and all other acts and things which may be reasonably
                  necessary or desirable to enable the Investors to consummate
                  the disposition of the Common Shares in such jurisdictions;
                  provided, however, that the Company shall not be required to
                  qualify to do business or to file a general consent to service
                  of process in any such jurisdictions;

         (d)      furnish to the Investors and to the underwriters of the
                  securities being registered a reasonable number of copies of
                  the registration statement, preliminary prospectus, final
                  prospectus, and such other documents as the Investors or
                  underwriters may reasonably request in order to facilitate the
                  public offering of such securities;

         (e)      notify the participating Investors, promptly after it shall
                  receive notice thereof, of the time when such registration
                  statement has become effective or a supplement to any
                  prospectus forming a part of such registration statement has
                  been filed;

         (f)      notify the  Investors  promptly  of any request by the SEC for
                  the amending or supplementing of such  registration  statement
                  or prospectus or for additional information;

         (g)      prepare and file with the SEC, promptly upon the request of
                  the Investors, any amendments or supplements to such
                  registration statement or prospectus which, in the opinion of
                  counsel for the Investors (and concurred in by counsel for the
                  Company), is required under the 1933 Act or the rules and
                  regulations thereunder in connection with the distribution of
                  the Common Shares by the Investors;

         (h)      prepare and promptly  file with the SEC,  and promptly  notify
                  the Investors of the filing of, any amendment or supplement to
                  such registration  statement or prospectus as may be necessary
                  to correct any  statements or omissions if, at the time when a
                  prospectus  relating  to such  securities  is  required  to be
                  delivered under the 1933 Act, any event shall have occurred as
                  the  result  of  which  any  such   prospectus  or  any  other
                  prospectus as then in effect would include an untrue statement
                  of a  material  fact  or  omit  to  state  any  material  fact
                  necessary to make the statement  therein,  in the light of the
                  circumstances in which they were made, not misleading;


                                      - 7 -

<PAGE>   8



         (i)      advise the Investors, promptly after it shall receive notice
                  or obtain knowledge thereof, of the issuance of any stop order
                  by the SEC suspending the effectiveness of such registration
                  statement or the initiation or threatening of any proceeding
                  for that purpose and promptly use its best efforts to prevent
                  the issuance of any stop order or to obtain its withdrawal if
                  such stop order should be issued;

         (j)      at least  three days prior to the filing of any  amendment  or
                  supplement  to  such  registration  statement  or  prospectus,
                  furnish  copies  thereof to the  Investors  and  refrain  from
                  filing any such amendment or supplement to which the Investors
                  shall  have  reasonably  objected  on the  grounds  that  such
                  amendment  or  supplement  does  not  comply  in all  material
                  respects  with the  requirements  of the 1933 Act or the rules
                  and regulations  thereunder,  unless in the opinion of counsel
                  for the Company the filing of such  amendment or supplement is
                  reasonably   necessary   to  protect  the  Company   from  any
                  liabilities under any applicable federal or state law and such
                  filing will not violate applicable law; and

         (k)      at the request of the Investors,  furnish on the date or dates
                  provided for in the underwriting agreement:  (i) an opinion of
                  counsel  addressed  to the  Investors  underwriters,  if  any,
                  opining as to such matters as may be  reasonably  agreed to by
                  such  underwriters  and the  Company;  and  (ii) a  letter  or
                  letters from the independent  certified public  accountants of
                  the Company, addressed to the underwriters, if any, and to the
                  Investors,  covering such matters as such underwriters and the
                  Investors   reasonably   request,   in  which   letters   such
                  accountants  shall state  (without  limiting the generality of
                  the  foregoing)  that they are  independent  certified  public
                  accountants within the meaning of the 1933 Act and that in the
                  opinion of such accountants the financial statements and other
                  financial  data of the Company  included  in the  registration
                  statement or any amendment or supplement thereto comply in all
                  material respects with the applicable accounting  requirements
                  of the 1933 Act.

         7. Expenses. With respect to the registrations requested pursuant to
Section 1 hereof which are to be at the expense of the Company, and with respect
to each inclusion of Common Shares in a registration statement pursuant to
Section 2 hereof and with respect to all registrations requested pursuant to
Section 3 hereof, the Company shall bear the following fees, costs, and
expenses: all registration, filing, and stock exchange fees, printing expenses,
fees and disbursements of counsel and accountants for the Company, fees and
disbursements of counsel for the underwriter or underwriters of such securities
retained by the Company, and all legal fees and disbursements and other expenses
of complying with state securities or blue sky laws of any jurisdictions in
which the securities to be offered are to be registered or qualified. Fees and
disbursements of counsel and accountants for the Investors and for any counsel
for underwriters retained solely by the Investors, underwriting discounts and
commissions and transfer taxes for the Investors, and any other expenses
incurred by the Investors not expressly included above shall be borne by the
Investors.


                                      - 8 -

<PAGE>   9



         8.       Indemnification

         (a)      By the Company.  The Company shall indemnify and hold harmless
                  each  holder  of  Common   Shares  that  are   included  in  a
                  registration  statement  pursuant to these  provisions and any
                  underwriter  (as  defined in the 1933 Act) for such holder and
                  each  person,  if  any,  who  controls  such  holder  or  such
                  underwriter  within  the  meaning  of the 1933  Act,  from and
                  against any and all loss, damage,  liability or claim to which
                  such  holder or any such  underwriter  or  controlling  person
                  becomes  subject  under  the  1933  Act or  otherwise,  and to
                  reimburse them, from time to time upon request,  for any legal
                  or other  costs or  expenses  reasonably  incurred  by them in
                  connection  with  investigating  any claims or  defending  any
                  actions, insofar as such losses, damages,  liabilities,  costs
                  or  expenses  are  caused by any untrue  statement  or alleged
                  untrue  statement  of any  material  fact  contained  in  such
                  registration  statement,  any prospectus  contained therein or
                  any  amendment or supplement  thereto,  or arise out of or are
                  based upon the omission or alleged omission to state therein a
                  material  fact  required to be stated  therein or necessary to
                  make the statements  therein, in light of the circumstances in
                  which they were made, not misleading;  provided, however, that
                  the  --------  -------  Company will not be liable in any such
                  case to the extent that any such loss, damage, liability, cost
                  or  expense  arises  out of or is  based  upon  (i) an  untrue
                  statement or alleged  untrue  statement or omission or alleged
                  omission  (other  than  a  statement  or  omission  about  the
                  Company) made in conformity with information  furnished by the
                  Investors in writing  specifically  for use in the preparation
                  of a  registration  statement  or (ii) an  untrue  or  alleged
                  untrue statement or omission or alleged omission (other than a
                  statement  or  omission   about  the  Company)   made  in  any
                  preliminary  prospectus  made in conformity  with  information
                  furnished by the Investors  where the prospectus  contained in
                  the  registration  statement  in the form filed by the Company
                  with the SEC  pursuant  to Rule 424  under  the 1933 Act shall
                  have  corrected  such statement or omission and a copy of such
                  prospectus  shall,  through no fault of the Company,  not have
                  been  sent or given to the  person  bringing  the  claim at or
                  prior to the confirmation of such sale to him.

         (b)      By Holders of Common Shares. Each holder of Common Shares that
                  are included in a  registration  pursuant to these  provisions
                  will  indemnify  and hold  harmless  the  Company,  each other
                  holder,  any underwriter and each person, if any, who controls
                  the Company,  such other holder or such underwriter,  from and
                  against any and all loss, damage, liability or claim, to which
                  the  Company or such other  holder or any  controlling  person
                  and/or any  underwriter  becomes subject under the 1933 Act or
                  otherwise  and to  reimburse  them,  from  time to  time  upon
                  request,  for any legal or other costs or expenses  reasonably
                  incurred by them in connection with  investigating  any claims
                  or  defending  any actions,  insofar as such losses,  damages,
                  liabilities,  costs,  or expenses  are caused by any untrue or
                  alleged  untrue  statement of any material  fact  contained in
                  such registration statement, any prospectus contained therein,
                  or any amendment or supplement thereto, or arise out of or are
                  based upon the omission or

                                      - 9 -

<PAGE>   10



                  the alleged omission to state therein a material fact required
                  to be stated therein or necessary to make the statements
                  therein, in light of the circumstances in which they were
                  made, not misleading, in each case to the extent, but only to
                  the extent, that such untrue statement or alleged untrue
                  statement or omission or alleged omission was so made in
                  reliance upon and in strict conformity with written
                  information furnished by such holder specifically for use in
                  the preparation thereof.

         (c)      Notice.  Promptly  after  receipt by an  Sections  indemnified
                  party  pursuant to the  provisions  of paragraph (a) or (b) of
                  this  Section 8 of notice of the  commencement  of any  action
                  involving  the  subject  matter  of  the  foregoing  indemnity
                  provision,  such indemnified party will, if a claim thereof is
                  to be made  against  the  indemnifying  party  pursuant to the
                  provisions of said paragraph (a) or (b),  promptly  notify the
                  indemnifying party in writing of the commencement thereof; but
                  the  omission  to so notify  the  indemnifying  party will not
                  relieve  it  from  any  liability  which  it may  have  to any
                  indemnified  party  otherwise  than  hereunder.  In case  such
                  action  is  brought  against  any  indemnified  party  and  it
                  notifies the indemnifying  party of the commencement  thereof,
                  the indemnifying party shall have the right to participate in,
                  and,  to the extent that it may wish,  jointly  with any other
                  indemnifying party similarly  notified,  to assume the defense
                  thereof,  with counsel satisfactory to such indemnified party;
                  provided,  however,  if the  defendants in any action  include
                  both  the   indemnified   --------   -------   party  and  the
                  indemnifying  party and there is a conflict of interest  which
                  would  prevent  counsel for the  indemnifying  party from also
                  representing the indemnified  party, the indemnified  party or
                  parties  shall  have the right to elect  separate  counsel  to
                  participate  in the  defense of such  action on behalf of such
                  indemnified   party  or   parties.   After   notice  from  the
                  indemnifying  party to such indemnified  party of its election
                  so to assume the defense thereof,  the indemnifying party will
                  not be  liable  to  such  indemnified  party  pursuant  to the
                  provisions of said paragraph (a) or (b) for any legal or other
                  expense  subsequently  incurred by such  indemnified  party in
                  connection  with the  defense  thereof  other than  reasonable
                  costs of investigation, unless (i) the indemnified party shall
                  have employed  counsel in  accordance  with the proviso of the
                  preceding sentence, (ii) the indemnifying party shall not have
                  employed  counsel  satisfactory  to the  indemnified  party to
                  represent the indemnified party within a reasonable time after
                  the notice of the  commencement  of the  action,  or (iii) the
                  indemnifying  party has  authorized  the employment of counsel
                  for the indemnified  party at the expense of the  indemnifying
                  party.

         (d)      Contribution. If for any reason the indemnification provided
                  for paragraphs (a) and (b) is unavailable to an indemnified
                  party or insufficient to hold it harmless as contemplated by
                  such paragraphs, then the indemnifying party shall contribute
                  to the amount paid or payable by the indemnified party as a
                  result of such loss, claim, damage or liability in such
                  proportion as is appropriate to reflect not only the relative
                  benefits received by the indemnified party and the
                  indemnifying party, but also the relative fault of the
                  indemnified party and the indemnifying party, as well as any
                  other

                                     - 10 -

<PAGE>   11



                  relevant equitable considerations; provided, however, that, in
                  any such case, (i) no holder of Common Shares will be required
                  to contribute any amount in excess of the purchase price of
                  all such Common Shares sold by such holder pursuant to such
                  registration statement, and (ii) no holder of Common Shares
                  guilty of a fraudulent misrepresentation (within the meaning
                  of Section 11(f) of the 1933 Act) will be entitled to
                  contribution from any holder of Common Shares who was not
                  guilty of such fraudulent misrepresentation.

                           Promptly after receipt by a holder of Common Shares
                  of notice of the commencement of any action, suit or
                  proceeding in connection with a public offering of Common
                  Shares, such holder will, if a claim for contribution in
                  respect thereof is able to be made against another party,
                  notify the contributing party of the commencement thereof. The
                  omission so to notify the contributing party will not relieve
                  it from any liability which it may have to any other party
                  other than for contribution under the Act. In case any such
                  action, suit or proceeding is brought against any party, and
                  such party notifies a contributing party of the commencement
                  thereof, the contributing party will be entitled to
                  participate therein with the notifying party and any other
                  contributing party similarly notified.

         9. Limitation of Market Activity. In connection with any registration
of Common Shares pursuant to Sections 1, 2 or 3 hereof, each holder of Common
Shares who is granted registration rights under Sections 1, 2 or 3 shall, in
consideration of such grant, agree in writing prior to the date on which the
registration statement becomes effective not to offer or sell any Common Shares
for a period of up to 120 days following the date upon which such registration
statement becomes effective under the 1933 Act if the managing underwriter so
requests.

         10. Transfer of Registration Rights. The registration rights and
related obligations provided herein may be transferred with the securities to
which they relate; provided, however, that (i) the Company shall be given
written notice by the transferor thereof at the time of such transfer stating
the name and address of the transferee and identifying the securities with
regard to which such rights are being transferred, and (ii) the transferee shall
agree in writing to assume the obligations of the transferor hereunder.

         11. Investors to Provide Information. In the event the Investors
request a registration of Common Shares, the Investors shall provide all such
information and materials and shall take all such actions as may be reasonably
required in order to permit the Company to comply with all applicable
requirements of the SEC and to obtain any desired acceleration of the effective
date of such registration statement. Specifically, the Company may require the
Investors to furnish the Company with such information regarding the Investors
and the distribution of its securities as the Company may from time to time
reasonably request in writing and as shall be required by law or the SEC.


                                     - 11 -

<PAGE>   12


         12. Rule 144 Reporting. With a view to making available the benefits of
certain rules and regulations of the SEC which may permit the sale of the Common
Shares to the public without registration, the Company agrees to:

         (a)      Make and keep public information available, as those terms are
                  understood and defined in Rule 144 under the 1933 Act, at all
                  times from and after 90 days following the effective date of
                  the first registration under the 1933 Act filed by the Company
                  for an offering of its securities to the general public;

         (b)      Use its best efforts to file with the SEC in a timely manner
                  all reports and other documents required of the Company under
                  the 1933 Act and the Securities Exchange Act of 1934 (the
                  "1934 Act");

         (c)      So long as an Investor owns any Common Shares, furnish to the
                  Investor forthwith upon request a written statement by the
                  Company as to its compliance with the reporting requirements
                  of Rule 144 and of the 1933 Act and the 1934 Act, a copy of
                  the most recent annual or quarterly report of the Company, and
                  such other reports and documents so filed as an Investor may
                  reasonably request in availing itself of any rule or
                  regulation of the SEC allowing an Investor to sell any such
                  securities without registration.

         13. Definition of Common Shares. For the purposes of this Exhibit E,
the term "Common Shares" shall mean the Common Shares of the Company and any
Common Shares into which the Company's Convertible Preferred Shares, par value
$8.00 per share, may be converted.


                                     - 12 -


<PAGE>   1
                                                                     EXHIBIT 5.1
                               September 26, 1997


Board of Directors
Bioanalytical Systems, Inc.
2701 Kent Avenue
West Lafayette, IN 47906

     Gentlemen/and Mrs. Kissinger:

     We have acted as counsel to Bioanalytical Systems, Inc., an Indiana
corporation (the "Company"), in connection with the filing of a Registration
Statement on Form S-1 (the "Registration Statement") with the Securities and
Exchange Commission (the "Commission") for the purposes of registering under
the Securities Act of 1933, as amended (the "Securities Act"), an aggregate of
up to 1,725,000 Common Shares of the Company (the "Shares") which are to be
offered to the public.  Of the Shares, up to 225,000 Shares may be issued by
the Company to  cover the over-allotment option to be granted to the
underwriters.

     In connection therewith, we have investigated those questions of law we
have deemed necessary or appropriate for purposes of this opinion.  We have
also examined originals, or copies certified or otherwise identified to our
satisfaction, of those documents, corporate or other records, certificates and
other papers that we deemed necessary to examine for the purpose of this
opinion, including:

            1. The proposed form of Second Restated Articles of Incorporation
               of the Company.

            2. A proposed form of specimen certificate representing the Shares;
               and

<PAGE>   2
Board of Directors
September 23, 1997
Page 2



            3. The Registration Statement.

     For purposes of this opinion, we have assumed (i) that the Shares will be
issued pursuant to the terms of the Registration Statement; and (ii) that no 
changes will occur in the applicable law or the pertinent facts before the 
issuance of the Shares.

     Based upon the foregoing and subject to the qualifications set forth in
this letter, we are of the opinion that when (a) the Second Restated Articles of
Incorporation of the Company have been adopted and approved by the Board of
Directors and shareholders of the Company and filed with the Secretary of
State of the State of Indiana in the  manner contemplated by the Indiana
Business Corporation Law and the Registration Statement, (b) the pertinent
provisions of the  Securities Act and all relevant state securities laws have
been complied with and (c) the Shares have been delivered against payment
therefor as contemplated by the Registration Statement, the Shares will be
validly authorized, legally issued, fully paid and non-assessable.
        
     We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the reference to this Firm under the caption
"Legal Matters" in the Prospectus included as a part of the Registration
Statement.  In giving this consent, we do not admit that we are within the
category of persons whose consent is required under Section 7 of the Securities
Act or under the rules and regulations relating thereto.



                                           Very truly yours,

                                          /s/ ICE MILLER DONADIO & RYAN

<PAGE>   1
                                                                   EXHIBIT 10.1


EMPLOYEE AGREEMENT (Inventions and confidential information) for BIOANALYTICAL
SYSTEMS INC.

In consideration of my employment (or continuation of such employment) by
BIOANALYTICAL SYSTEMS INC. and in consideration of the compensation to be paid
me for my services in the course of such employment, I for myself, my heirs,
executors, administrators or other legal representatives and assigns, do hereby
agree:

1.       That "company" whenever used in this agreement  includes  BIOANALYTICAL
         SYSTEMS and/or any of its divisions and subsidiaries.

2.       That I will (a) promptly  disclose and assign,  and do hereby assign to
         the company, any and all inventions, discoveries and improvements which
         I may discover or conceive  either solely or jointly with others during
         the period of my employment (whether or not during usual working hours)
         and which  relate to or are  susceptible  of use in the business of the
         Company;   (b)  disclose  promptly  any  technical  data,  know-how  or
         information which I may acquire with respect to any matters relating to
         the Company's business; (c) assist the Company at the Company's expense
         in obtaining  for its benefit  patents in the United  States and in any
         and all  foreign  countries  on all such  inventions,  discoveries  and
         improvements in enforcing and defending its rights relating to any such
         patents,  inventions,  discoveries or improvements;  (d) testify on its
         behalf with respect thereto;  and (e) execute all proper papers for use
         in  applying  for,  obtaining  and  maintaining  such  patents,  and in
         maintaining or enforcing the rights of the Company thereunder.

3.       That any such inventions, discoveries and improvements and any
         technical data, information or knowhow made, discovered or conceived or
         acquired by me in the course of my employment and relating to the
         Company's business (other than information of public knowledge),
         whether patented or not, are to be and remain the property of the
         Company.

4.       That I will not, without the authorization of the Company, disclose to
         any person outside the Company or use at any time (either during or
         subsequent to my said employment) any trade secrets, technical data, or
         know-how relating to the Company's products, processes, methods,
         equipment and business practices which I have acquired during my
         employment until such information shall have become public knowledge.

5.       That the foregoing obligations shall survive the termination of my
         employment and that I will perform all necessary acts to make the
         agreement effective; that on leaving the employ of the Company, I will
         not take with me, without its consent, any drawings, blueprints,
         documents or records belonging to the Company, or copies or transcripts
         thereof, and that at such time prior thereto on demand, I will turn
         over to the Company all notebooks, drawings, blueprints,




                                                                     Page 1 of 4

<PAGE>   2



         copies, transcripts or other notes, records or material belonging to
         the Company which are in my possession or under my control.
6.       That I have set forth in Schedule A on the following page, made a part
         of this agreement, a list and written description of all inventions,
         patented or unpatented, if any owned by me prior to my employment by
         the Company. These inventions are to be excluded from this agreement.

7.       I represent that I do not have in my  possession,  and will not use for
         the benefit of BAS, any confidential information or documents belonging
         to others, including but not limited to previous employers. I represent
         that employment by BAS will not require me to violate any obligation to
         others,  under  contract or otherwise,  or to violate any confidence of
         others.  I represent  that I have  executed  no prior  non_competition,
         non_disclosure  or   confidentiality   agreements  that  are  currently
         binding,  and that at the time of signing this agreement,  I know of no
         written or oral contract or of any other  impediment that would inhibit
         my employment with the Company.

8.       That I have set forth in Schedule B below, made a part of this
         agreement, a list of all agreements with or obligations to other
         companies or parties which require that I keep secret or confidential
         knowledge or information which I acquired from such other company or
         party. I represent that except as stated on the reverse of this
         agreement I have no agreements with or obligations to others in
         conflict with the foregoing provisions of this agreement.

9.       Upon leaving the Company for any cause, I will sign and honor the
         attached TERMINATION AGREEMENT which verifies my review of the above
         material.

10.      My signature below indicates that l have understood the significance of
         the above.

                                   Employee's Name:_____________________________
                                                            (printed)

Witness.  ___________________________    Employee's_____________________________
          Supervisor or Corp. Officer              
                                         Signature:_____________________________

                                         Date:__________________________________

SCHEDULE A -- Inventions (List and describe):

| |    not applicable_________________________________(initial)
                                                      





                                                                     Page 2 of 4
<PAGE>   3





SCHEDULE B -- Confidential Information (List agreements with or obligations to
others):

| |    not applicable________________________(initial)
                                             





Do not Write Below This Line

________________________________________________________________________________

                                        Accepted:

                                        BIOANALYTICAL SYSTEMS, INC.



                                        By:_____________________________________

                                                                     Page 3 of 4

<PAGE>   4


                              TERMINATION AGREEMENT


I hereby acknowledge that I have reviewed with my supervisor and understand the
attached EMPLOYMENT AGREEMENT which I signed on _________________________ when I
joined Bioanalytical Systems, Inc. I furthermore assure that I have not retained
any technical material, files, laboratory notebooks, circuit diagrams, software,
marketing plans, equipment, prototypes, customers lists, financial data, and
like materials covered by the AGREEMENT or otherwise in my possession while at
Bioanalytical Systems and that I will not disclose the contents of such to third
parties.

I have furthermore returned to Bioanalytical Systems, Inc. all keys, credit
cards, and telephone calling cards and have not duplicated such materials or
transferred them to third parties.

I further agree that any outstanding money owed by me to Bioanalytical Systems,
Inc. or the cost of equipment owned by Bioanalytical Systems, Inc. but retained
by me may be deducted from any wages/salaries/commissions due me from
Bioanalytical Systems, Inc.


_________________________________________                _______________________
     Signed                                                        Date


_________________________________________ Witness
  (Supervisor or BAS Corporate Officer)

                                                                     Page 4 of 4


<PAGE>   1
                                                                    EXHIBIT 10.2

                          BIOANALYTICAL SYSTEMS, INC.

                       OUTSIDE DIRECTOR STOCK OPTION PLAN


      1.        DEFINITIONS.  The following  terms shall have the meanings 
hereinafter set forth:

                (a) "Affiliate" means a corporation which is a parent or
subsidiary corporation of the Company, or a corporation or a parent or a
subsidiary corporation of the Company issuing or assuming the options issued
under the Plan in a transaction in which Section 425(a) of the Code applies.
        
        
                (b)  "Board of Directors" means the board of directors of
the Company, as it shall exist from time to time.


                (c)  "Code" means the Internal Revenue Code of 1986, as it 
shall be amended from time to time.


                (d)  "Committee" means the director stock option committee
administering the Plan as provided in paragraph 3 hereof.


                (e)  "Common Shares" means the Common Shares, $1.00 par
value, of the Company.


                (f)  "Company" means Bioanalytical Systems, Inc., an Indiana
corporation.


                (g)  "Nonstatutory Stock Option" means an option which is
not an incentive stock option within the meaning of Section 422A of the Code
and which is governed by Section 83 of the Code for Federal income tax
purposes.
        

                (h)  "Optionee" means an Outside Director granted an option
under the Plan.

                (i)  "Outside Director" means any director of the Company or
an Affiliate who is not employed by the Company or any Affiliate in any 
capacity.

                (j)  "Plan" means this Bioanalytical Systems, Inc. Outside 
Director Stock Option Plan.


      2.        PURPOSE.  This Plan is intended to be an incentive to, and to
encourage ownership of the Common Shares by, Outside Directors of the Company
and its Affiliates in order to provide such Outside Directors with a more
direct and proprietary interest in the welfare and success of the Company and
to encourage their continuation as directors of the Company.  The Plan is
further intended to promote continuity of membership on the Board of Directors
and to increase the incentive 


<PAGE>   2


to promote the welfare of the Company by those who are primarily responsible
for shaping and carrying out the long-term plans and objectives of the Company,
thereby furthering and securing the Company s continued growth and financial
success.  It is contemplated that only Nonstatutory Stock Options will be
granted under the Plan.
        
         3.     ADMINISTRATION.  The Plan shall be administered by
the Committee which shall consist of all of the members of the Board of
Directors who are not Outside Directors and such Outside Directors who are not
then participating in the Plan.  Members of the Committee shall not be eligible
to participate in the Plan while serving on the Committee.  The Committee shall
have the power (a) to interpret and construe the provisions of the Plan or any
option granted under it, and such interpretation or construction shall be final
and binding; (b) to select Outside Directors to whom grants of options under
the Plan shall be made as more particularly set forth in paragraph 4 hereof;
(c) to determine the terms and conditions of each option granted hereunder; (d)
to determine the time at which such grants shall be made and the number of
Common Shares to be optioned under such grant; and (e) to make any other
determinations regarding the Plan which are not otherwise expressly provided
herein.  The Committee may prescribe, amend and rescind rules and regulations
relative to the Plan or its construction or interpretation.  A majority of the
Committee shall constitute a quorum.  All determinations of the Committee shall
be made by the vote of a majority of its members; provided, however, that if
there are fewer than three (3) members of the Committee at any time, all
determinations shall be a joint determination of its members.  No member of the
Committee shall be liable for any action or determination made in good faith.
        
         4.     ELIGIBILITY.  Only those persons who are Outside
Directors shall be eligible to participate in the Plan.  The Committee shall
determine from time to time the particular Outside Directors who shall be
eligible to participate in the Plan and the extent of their participation
therein.

         5.     SHARES.  The shares subject to the options and other
provisions of the Plan shall be the Company's authorized, but unissued, or
reacquired Common Shares.  The total number of the Common Shares on which
options may be granted under the Plan shall not exceed in the aggregate
twenty-four thousand (24,000) shares, except as such number of shares shall be
adjusted in accordance with the provisions set forth in paragraph 6(g) hereof.
The total amount of Common Shares on which options may be granted in any
calendar year shall not exceed six thousand (6,000), adjusted in accordance
with paragraph 6(g) hereof.  In the event any outstanding option under the Plan
expires or is terminated for any reason prior to the end of the period during
which options may be granted, the Common Shares allocable to the unexercised
portion of such option may again be subject to an option under the Plan.
During the period that any options granted hereunder are outstanding, the
Company shall reserve and keep available such number of Common Shares as will
be sufficient to satisfy all outstanding, unexercised options.

         6.     TERMS AND CONDITIONS OF OPTIONS.  Options  granted
pursuant to the Plan shall be evidenced by agreements in such form as the
Committee shall from time to time prescribe, which agreements shall comply with
and be subject to the following terms and conditions:

                                     -2-

<PAGE>   3


                (a) MEDIUM AND TIME OF PAYMENT.  The option price shall
be payable in United States dollars upon the exercise of the option and shall
be paid in cash, by certified check, or by bank cashier's check, personal check
or by the delivery to the Company of Common Shares owned by the grantee, the
fair market value of which equals the option price, or by a combination of cash
and Common Shares which together equal the option price.  Fair market value of
any Common Shares surrendered shall be determined by the Committee in the same
manner that it is determined in establishing option prices.  Payment of the
option price shall be accompanied by a written subscription agreement in a form
to be prescribed by the Committee.
        

                 (b)    NUMBER OF SHARES; DATE OF GRANT.  The option agreement
shall state the total number of shares to which it pertains, and the date of
the grant of the option.
        

                 (c)    OPTION PRICE.  The option price shall be an amount per
share not less than the fair market value per share of the Common Shares on the
date of grant of the option.  Fair market value shall be determined by the
Committee in accordance with such procedures as the Committee shall from time
to time prescribe.
        

                 (d)    TERM OF OPTIONS.  Each option granted under the Plan
shall expire within the period prescribed in the agreement relating thereto,
which shall not be more than ten (10) years from the date the option is
granted.
        

                 (e)    TIME OF EXERCISE.  Each option granted pursuant to the
Plan shall be exercisable in four equal installments.  The option may be
exercised as to the shares covered by the first installment from and after the
second anniversary of the grant of the option, with second, third and fourth
installments becoming exercisable on the three succeeding anniversary dates. 
Except as specifically restricted by the provisions of this paragraph 6(e) or
by the Committee acting hereunder, any option may be exercised in whole at any
time or in part from time to time during its term.
        
                 (f)    CESSATION OF SERVICE AS A DIRECTOR.  In the event an
Optionee ceases to serve as a director of the Company or an Affiliate all
options outstanding in the hands of the Optionee shall terminate immediately as
to any unexercised portion thereof; provided, however, that if any cessation of
service is due to retirement with the consent of the Company or is due to
permanent and total disability, the Optionee shall have the right, subject to
the provisions of paragraphs 6(d) and 6(e) hereof, to exercise the option, with
respect to the Common Shares for which it could have been exercised on the
effective date of the Optionee's cessation of service, at any time within three
(3) months after such cessation of service due to retirement with the consent
of the Company or at any time within twelve (12) months after such cessation of
service due to permanent and total disability; and provided further, that if
the Optionee shall die while serving as a director of the Company or an
Affiliate, the Optionee's personal representative shall have the right, subject
to the provisions of paragraphs 6(d) and 6(e) hereof, to exercise the option
with respect to the Common Shares 

                                     -3-

<PAGE>   4


for which the option could have been exercised on the date of death, at any
time within twelve (12) months from the date of the Optionee's death.  Whether
a cessation of service is a retirement with the consent of the Company or due
to permanent and total disability, and whether an authorized leave of absence
or absence on military or government service shall be deemed to constitute
cessation of service for the purposes of the Plan, shall be determined by the
Committee in its sole discretion, which determination shall be final and
conclusive.
        

                 (g)    RECAPITALIZATION.  The aggregate number of Common
Shares on which options may be granted hereunder, the number of Common Shares
covered by each outstanding option, and the price per share set forth in each
option agreement, shall all be proportionately adjusted for any increase or
decrease in the number of issued Common Shares resulting from a subdivision or
consolidation of shares of the Company or any other capital adjustment of the
Company, the payment of a share dividend, a share split or any other increase
or decrease in the Common Shares effected without receipt of consideration by
the Company.  In the event that, prior to the delivery by the Company of the
Common Shares remaining unexercised under any outstanding option hereunder,
there shall be a capital reorganization or reclassification of the capital of
the Company resulting in a substitution of other shares for the Common Shares,
there shall be substituted the number of substitute shares which would have
been issued in exchange for the Common Shares then remaining under the option
if such Common Shares had been then issued and outstanding.
        

                 (h)    MERGER, DISSOLUTION.  If the Company shall be a party
to any merger or consolidation, the Company shall have the right to terminate
any option outstanding on thirty (30) days' written notice; provided, however,
if such merger or consolidation is not consummated within 180 days from the
date of the aforementioned notice, all options terminated shall be deemed to
have been continuously in effect since the date of execution thereof.  In the
event of a dissolution or liquidation of the Company, the Company shall give
each optionee thirty (30) days written notice specifying the effective date
thereof. Every unexercised option outstanding hereunder on the date set by the
Company as the effective date of the dissolution or liquidation shall be deemed
to be terminated upon such dissolution or liquidation.
        
                 (i)    NONASSIGNABILITY.  No option granted under the Plan
shall be assignable or transferable except by will or under the laws of descent
and distribution.  During the lifetime of an Optionee, the option shall be
exercisable only by the Optionee.
        
        
                 (j)    ISSUANCE OF SHARES AND COMPLIANCE WITH SECURITIES LAWS.
The Company may postpone the issuance and delivery of certificates representing
Common Shares until (a) the admission of such shares to listing on any stock
exchange on which shares of the Company of the same class are then listed and
(b) the completion of such registration or other qualification of such shares
under any state or Federal law, rule or regulation or the rules and regulations
of any exchange upon which the Common Shares are treated as the Company shall
determine to be necessary or advisable, which registration or other

                                     -4-

<PAGE>   5


qualification the Company shall use its best efforts to complete.  Any person
purchasing Common Shares pursuant to the Plan may be required to make such
representations and furnish such information as may, in the opinion of counsel
for the Company, be appropriate to permit the Company, in light of the
existence or non- existence with respect to such shares of an effective
registration under the Securities Act of 1933, as amended, or any similar state
statute, to issue the shares in compliance with the provisions of those or any
comparable acts.
        
                 (k)    RIGHTS AS A SHAREHOLDER.  An Optionee shall have no
rights as a shareholder with respect to Common Shares covered by an option
until the date of issuance of a certificate to the Optionee. The certificate
shall not be issued until the Optionee has exercised the option and has fully
paid for the Common Shares acquired thereby. No adjustment will be made for
dividends or other rights for which the record date is prior to the date such
certificate is issued.
        
                 (l)    OTHER PROVISIONS.  The option agreements entered into
under the Plan shall contain such other provisions, limitations, restrictions
and requirements as the Committee shall deem advisable.
        

         7.      TERM OF PLAN.  The Plan shall become effective upon the
receipt of approval by the holders of a majority of the issued and outstanding
Common Shares voting in person or by proxy at a duly held shareholders'
meeting; provided, however, that the Plan shall become effective only if
approved by such shareholders within twelve (12) months before or after the
date the Plan is adopted by the Board of Directors.  The Plan shall terminate
ten (10) years after the earlier of the date the Plan is adopted by the
Board of Directors or the date the Plan is approved by the shareholders, or on
such earlier date as the Board of Directors may determine.  No option shall be
granted under the Plan after such termination date.

         8.      AMENDMENT OF THE PLAN.  The Board of Directors,
excluding any members of the Board of Directors participating in the Plan, may
from time to time, alter, amend, suspend, or discontinue the Plan with respect
to any Common Shares as to which options have not been granted; provided,
however, that no action may be taken hereunder which would alter or impair any
of the rights or obligations of the Company or any Optionee with respect to any
outstanding option without the consent of the Optionee thereof.

         9       APPLICATION OF FUNDS.  The proceeds received by the
Company from the sale of Common Shares pursuant to options granted hereunder
will be used for general corporate purposes.

         10.     NO OBLIGATION TO EXERCISE OPTION.  The granting of an
option hereunder shall impose no obligation upon the Optionee to exercise such
an option.

         11.     NO RIGHT TO REELECTION.  Neither the adoption of the
Plan, the granting of an option hereunder, nor any other action taken relating
to the Plan shall impose any obligation on the 

                                     -5-

<PAGE>   6


Company or any Affiliate or the Board of Directors of either to nominate any
Outside Director for reelection as a director by the shareholders of the
Company or any Affiliate.
        
         12.     APPLICABILITY OF AMENDMENTS.  All outstanding options shall 
be deemed to be amended so as to include, to the extent applicable thereto, any
amendments made to the Plan subsequent to the granting of such options.
        
         13.     WITHHOLDINGS.  The Company shall have the right to require 
the Optionee to remit to the Company amounts sufficient to satisfy any
applicable withholding requirements set forth in the Code or under state or
local law relating to options granted to the Optionee.  The Company shall have
the right, to the extent permitted by law, to deduct from any payment of any
kind otherwise due to an Optionee who exercises an option any federal, state or
local taxes of any kind required by law to be withheld with respect to the
Common Shares subject to such option.
        
                                     -6-

<PAGE>   1
                                                                   EXHIBIT 10.3

                           BIOANALYTICAL SYSTEMS, INC.

                     OUTSIDE DIRECTOR STOCK OPTION AGREEMENT


         THIS AGREEMENT, made this 9th day of January, 1989, by and between
Bioanalytical Systems, Inc., an Indiana corporation with its principal office at
Purdue Research Park, West Lafayette, Indiana (hereinafter called "Company"),
and E. Keith Moore, residing at 3335 Woodland Parkway, Columbus, Indiana
(hereinafter called the "Grantee"), pursuant to the terms, conditions and
limitations contained in the Company's Outside Director Stock Option Plan
(hereinafter called the "Plan"), a copy of which is attached hereto as Exhibit
A,
                                WITNESSETH THAT:

         WHEREAS, in the interests of affording an incentive to the Grantee to
give his best efforts to the Company as a Director, the Company wishes to
provide that the Grantee shall have an option to buy Common Shares of the
Company:

         NOW, THEREFORE, it is hereby mutually agreed as follows:

         1. The Company hereby grants to the Grantee the right and option to
purchase, on the terms and conditions hereinafter set forth, all or any part of
an aggregate of 6,000 shares (hereinafter called "Subject Shares") of the
presently authorized, but unissued, or treasury, Common Shares of the Company
(hereinafter called the "Common Shares"), granted in three equal installments as
of January 9, 1989; January 8, 1990; and January 14, 1991, at a purchase price
of $3.00 per share, exercisable in whole or in part from time to time subject to
the limitation that no option may be exercised with respect to fewer than
twenty-five (25) shares unless there are fewer than twenty-five (25) shares then
subject to option hereunder, in which event any exercise must be as to all such
shares


<PAGE>   2



and subject to the further limitation that the options represented by this
Agreement shall be exercisable in four equal installments as set forth in
Section 6(e) of the Plan. The option shall expire as to all shares subject to
purchase hereunder on the 10th anniversary date of this Agreement if not
exercised on or before such date.

         2. Subject to the limitation specified in Section 1 hereof and in
Section 6(e) of the Plan, the Grantee may from time to time exercise this option
by delivering a written notice of exercise and subscription agreement to the
Secretary of the Company specifying the number of whole shares to be purchased,
accompanied by payment in cash, by certified check, or bank cashier's check, of
the aggregate option price of such number of shares. Such exercise shall be
effective upon receipt by the Secretary of such written notice, subscription
agreement and payment of the purchase price. Only the Grantee may exercise the
option during the lifetime of the Grantee. No fractional shares may be purchased
at any time hereunder.

         3. Upon the effective exercise of the option, or any part thereof,
certificates representing the shares so purchased, marked fully paid and
non-assessable, shall be delivered to the person who exercised the option,
except as provided in Section 6(j) of the Plan. Until certificates representing
such shares shall have been issued and delivered, the Grantee shall not have any
of the rights or privileges of a shareholder of the Company in respect of any of
such shares.

         4. In the event that, prior to the delivery of the Company of all the
Subject Shares, there shall be an increase or reduction in the number of Common
Shares of the Company issued and outstanding by reason of any subdivision or
consolidation of Common Shares or any other capital adjustment, the number of
shares then subject to this option shall be increased or decreased as provided
in Section 6(g) of the Plan.

                                      - 2 -

<PAGE>   3



         5. The option and the rights and privileges conferred by this Option
Agreement shall not be assigned or transferred by the Grantee in any manner
except by will or under the laws of descent and distribution. In the event of
any attempted assignment or transfer in violation of this Section 5, the option,
rights and privileges conferred by this Option Agreement shall become null and
void.

         6. Nothing herein contained shall be deemed to create any limitation or
restriction upon such rights as the Company would otherwise have to terminate a
person as a director of the Company.
 
         7. The option, rights and privileges herein conferred are granted
subject to the terms and conditions set forth herein and in the Plan.  

         8. Any notices to be given or served under the terms of this Option
Agreement shall be addressed to the Secretary of the Company at Purdue Research
Park, West Lafayette, Indiana, and to the Grantee at the address set forth on
page one of this Option Agreement, or such other address or addresses as either
party may hereafter designate in writing to the other. Any such notice shall be
deemed to have been duly given or served, if and when enclosed in a properly
sealed envelope or wrapper addressed as aforesaid, postage prepaid, and 
deposited in the United States mail.

         9. The interpretation by the Stock Option Plan Committee, appointed by
the Company's Board of Directors, of any provisions of the Plan or of this
Option Agreement shall be final and binding on the Grantee unless otherwise
determined by the Company's Board of Directors.

         10. This option, and any Common Shares which may be acquired hereby,
are being acquired by the Grantee for investment only and not for resale.
Neither this option nor the Subject Shares have been registered under the
Securities Act of 1933 or any state securities law. None of the Subject Shares
may be sold, transferred, pledged, or hypothecated unless first registered under
such

                                      - 3 -

<PAGE>   4


laws, or unless counsel for the Company has given an opinion that registration
under such laws is not required, and the Grantee agrees to the placement of a
legend to that effect upon any certificates evidencing Common Shares acquired by
him through the exercise of the option granted hereby.

         11. This Option Agreement shall be governed by the laws of the State of
Indiana.

         IN WITNESS WHEREOF, the Company and the Grantee have signed this Option
Agreement as of the day and year first above written.

                                         "COMPANY"

                                         BIOANALYTICAL SYSTEMS, INC.



                                         By: 
                                            ------------------------------------

ATTEST:

- -----------------------

                                         "GRANTEE"



                                         By:
                                            ------------------------------------

                                     - 4 -


<PAGE>   1
                                                                   EXHIBIT 10.4

                           BIOANALYTICAL SYSTEMS, INC.

                      EMPLOYEE INCENTIVE STOCK OPTION PLAN

                             Adopted January 8, 1990


         1. PURPOSE. This Employee Incentive Stock Option Plan (hereinafter
referred to as the Plan") is intended to be an incentive to, and to encourage
share ownership by, key employees of Bioanalytical Systems, Inc. and its
subsidiaries (hereinafter collectively referred to as the "Employer") in the
manner contemplated by Section 422A of the Internal Revenue Code of 1986, as
amended ("Code"), in order to provide such employees with a more direct and
proprietary interest in the welfare and success of the Employer and to insure
their continuation as employees of the Employer.

         2. ADMINISTRATION. The Plan shall be administered by an Incentive Stock
Option Committee (hereinafter referred to as the "Committee") consisting of
three (3) or more members of the Board of Directors of Bioanalytical Systems,
Inc. (the "Company") who are appointed from time to time by the Board of
Directors of the Company. The Board of Directors of the Company may from time to
time remove members from, or add members to, the Committee. Vacancies on the
Committee, howsoever caused, shall be filled by the Board of Directors of the
Company. Members of the Committee shall not be eligible to participate in the
Plan while serving on the Committee. The Committee shall have the power to
interpret and construe the provisions of the Plan or any option granted under
it, and such interpretation or construction shall be final and binding. The
Committee may prescribe, amend and rescind rules and regulations relative to the
Plan or its construction or interpretation. A majority of the Committee shall
constitute a quorum. All determinations of the Committee shall be made by not
less than a majority of its members. No member of the Committee shall be liable
for any action or determination made in good faith.

         3. ELIGIBILITY. Only those persons who are key employees of the
Employer shall be eligible to participate in the Plan. The Committee shall
determine from time to time the particular employees of the Employer who shall
be eligible to participate in the Plan and the extent of their participation
therein. No option shall be granted under the Plan to any employee of the
Employer, who, at the time such option is granted, owns shares possessing more
than ten percent (10%) of the total combined voting power of all classes of
shares of the Company or of any parent or subsidiary corporation of the Company
or any parent or subsidiary corporation of any of the foregoing (such employee
being hereinafter referred to as a "10% Shareholder"), except as provided below.
In determining whether the percentage limitations of this paragraph are met, an
employee shall be considered as owning any shares owned, directly or indirectly,
by or for his brothers or sisters (whether by the whole or half blood), spouse,
ancestors, and lineal descendants. For purposes of this paragraph 3, shares
owned, directly or indirectly, by or for a corporation, partnership, estate, or
trust shall be considered as being owned proportionately by or for its
shareholders, partners, or beneficiaries. The percentage limitations of this
paragraph 3 shall not apply, however, if at the time such option is granted the
option price is at least one hundred ten percent (110%) of the fair market



<PAGE>   2



value of the shares subject to the option and such option by its terms is not
exercisable after the expiration of five (5) years from the date such option is
granted.

         4. SHARES. The shares subject to the options and other provisions of
the Plan shall be shares of the Company's authorized, but unissued, or
reacquired Common Shares (the "Common Shares"). The total amount of the Common
Shares on which options may be granted shall not exceed in the aggregate Two
Hundred Fifty Thousand (250,000) shares, except as such number of shares shall
be adjusted in accordance with the provisions set forth in paragraph 6(g)
hereof. The total amount of Common Shares on which options may be granted in any
calendar year shall not exceed Fifty Thousand (50,000), adjusted in accordance
with paragraph 6(g) hereof. In the event any outstanding option under the Plan
expires or is terminated for any reason prior to the end of the period during
which options may be granted, the Common Shares allocable to the unexercised
portion of such option may again be subject to an option under the Plan. During
the period that any options granted hereunder are outstanding, the Employer
shall reserve and keep available such number of Common Shares as will be
sufficient to satisfy all outstanding, unexercised options.

         5. MAXIMUM EXERCISE RULE. The aggregate fair market value (determined
at the time the option is granted) of the shares with respect to which incentive
stock options are exercisable for the first time by an employee during any
calendar year under all such plans of the Employer and any parent or subsidiary
corporation of the Employer shall not exceed One Hundred Thousand Dollars
($100,000.00).

         6. TERMS AND  CONDITIONS OF OPTIONS.  Options  granted  pursuant to the
Plan shall be evidenced by agreements  in such form as the Committee  shall from
time to time prescribe, which agreements shall comply with and be subject to the
following terms and conditions:

                  (a) MEDIUM AND TIME OF PAYMENT. The option price shall be
         payable in United States dollars upon the exercise of the option and
         shall be paid in cash, by certified check, or by bank cashier's check,
         or by the delivery to the Company of Common Shares of the Company owned
         by the optionee, the fair market value of which equals the option
         price, or by a combination of cash and Common Shares which together
         equal the option price. Fair market value of the Common Shares shall be
         determined by the Committee in the same manner that it is determined in
         establishing option prices. Payment of the option price shall be
         accompanied by a written subscription agreement in a form to be
         prescribed by the Committee.

                  (b) NUMBER OF SHARES.  The option shall state the total number
         of  shares  to which  it  pertains,  and the  date of the  grant of the
         option.

                  (c) OPTION PRICE. The option price shall be an amount per
         share not less than the fair market value per share of the Common
         Shares on the date of granting of the option. In the case of options
         granted to an employee of the Employer who is a 10% Shareholder, the
         option price shall be an amount per share not less than one hundred ten
         percent (110%) of the fair market value per share of the Common Shares
         on the date of the granting of the option. Fair market value shall be
         determined by the Committee in accordance with such procedures as the
         Committee shall from time to time prescribe.

                                      - 2 -     
<PAGE>   3
                  (d) TERM OF OPTIONS. The term of each option granted under the
         Plan shall expire within the period prescribed in the agreement
         relating thereto, which shall not be more than five (5) years from the
         date the option is granted if the optionee is a 10% Shareholder and not
         more than ten (10) years from the date the option is granted if the
         optionee is not a 10% Shareholder.

                  (e) DATE OF EXERCISE. Each option granted pursuant to the Plan
         shall be exercisable in four equal installments. The option may be
         exercised as to the shares covered by the first installment from and
         after the second anniversary of the grant of the option, with second,
         third and fourth installments becoming exercisable on the three
         succeeding anniversary dates. Except as specifically restricted by the
         provisions of this paragraph 6(e) or the Committee acting hereunder,
         any option may be exercised in whole at any time or in part from time
         to time during its term.

                  (f) TERMINATION OF EMPLOYMENT. In the event an optionee shall
         cease to be employed by the Employer, a parent corporation of the
         Employer, or a corporation or a parent or a subsidiary corporation of
         such corporation issuing or assuming an option in a transaction to
         which Section 425(g) of the Code applies, all options outstanding in
         the hands of the optionee shall terminate immediately as to any
         unexercised portion thereof; provided, however, that if any cessation
         of employment is due to retirement with the consent of the Employer or
         permanent and total disability, the optionee shall have the right,
         subject to the provisions of paragraph 6(d) and paragraph 6(e) hereof,
         to exercise the option, with respect to the shares for which it could
         have been exercised on the effective date of his cessation of
         employment, at any time within three (3) months after such cessation of
         employment due to retirement with the consent of the Employer or at any
         time within twelve (12) months after such cessation of employment due
         to permanent and total disability; and provided further, that if the
         employee shall die while in the employ of the Employer, the employee's
         personal representative shall have the right, subject to the provisions
         of paragraph 6(d) and paragraph 6(e) hereof, to exercise the option
         with respect to the shares for which it could have been exercised on
         the date of death, at any time within twelve (12) months from the date
         of death. Whether a cessation of employment is to be considered a
         retirement with the consent of the Employer or due to permanent and
         total disability, and whether an authorized leave of absence or absence
         on military or government service shall be deemed to constitute
         termination of employment, for the purposes of the Plan, shall be
         determined by the Committee, which determination shall be final and
         conclusive.

                  (g) RECAPITALIZATION. The aggregate number of Common Shares on
         which options may be granted hereunder, the number of shares thereof
         covered by each outstanding option, and the price per share thereof in
         each such option, shall all be proportionately adjusted for any
         increase or decrease in the number of issued Common Shares resulting
         from a subdivision or consolidation of shares or any other capital
         adjustment, the payment of a share dividend, or other increase or
         decrease in the Common Shares effected without receipt of
         consideration by the Employer. In the event that, prior to the
         delivery by the Employer of 

                                      - 3 -
<PAGE>   4



         the Common Shares remaining under any outstanding option hereunder,
         there shall be a capital reorganization or reclassification of the
         capital of the Employer resulting in a substitution of other shares
         for the Common Shares, there shall be substituted the number of
         substitute shares which would have been issued in exchange for the
         Common Shares then remaining under the option if such Common Shares
         had been then issued and outstanding.
        
                  (h) MERGER, DISSOLUTION. If the Employer shall be a party to
         any merger or consolidation, the Employer shall have the right to
         terminate any option outstanding on thirty (30) days' written notice;
         provided, however, if such merger or consolidation is not consummated
         within 180 days from the date of the aforementioned notice, all options
         terminated shall be deemed to have been continuously in effect since
         the date of execution thereof. In the event of a dissolution or
         liquidation of the Employer, the Employer shall give each optionee
         thirty (30) days written notice thereof; every unexercised option
         outstanding hereunder shall be deemed to be terminated upon such
         dissolution or liquidation.

                  (i)   ASSIGNABILITY.  No option shall be assignable or
         transferable except by will or under the laws of descent and
         distribution.  During the lifetime of an optionee, the option shall be
         exercisable only by the optionee.

                  (j) ISSUANCE OF SHARES AND COMPLIANCE WITH SECURITIES LAWS.
         The Employer may postpone the issuance and delivery of certificates
         representing shares until (a) the admission of such shares to listing
         on any stock exchange on which shares of the Employer of the same class
         are then listed and (b) the completion of such registration or other
         qualification of such shares under any state or federal law, rule or
         regulation as the Employer shall determine to be necessary or
         advisable, which registration or other qualification the Employer shall
         use its best efforts to complete. Any person purchasing shares pursuant
         to the Plan may be required to make such representation and furnish
         such information as may, in the option of counsel for the Employer, be
         appropriate to permit the Employer, in light of the existence or
         non-existence with respect to such shares of an effective registration
         under the Securities Act of 1933, as amended, or any similar state
         statute, to issue the shares in compliance with the provisions of those
         or any comparable acts.

                  (k) RIGHTS AS A SHAREHOLDER. An optionee shall have no rights
         as a shareholder with respect to shares covered by an option until the
         date of issuance of a certificate to him and only after such shares are
         fully paid. No adjustment will be made for dividends or other rights
         for which the record date is prior to the date such certificate is
         issued.

                  (l) OTHER PROVISIONS. The option agreements entered into under
         the Plan shall contain such other provisions as the Committee shall
         deem advisable.

         7. TERM OF PLAN. The Plan shall become effective upon the approval by
the holders of a majority of the issued and outstanding shares of each class of
the voting shares of the Company 


                                      - 4 -

<PAGE>   5


voting  in person or by proxy at a duly  held  shareholders' meeting;  provided,
however,  the Plan  shall become effective only if approved by such shareholders
within  twelve (12)  months  before or after the date the Plan is adopted by the
Company's Board of Directors.  The Plan shall terminate ten (10) years after the
earlier  of the date the Plan is adopted or the date the Plan is approved by the
shareholders, (1)  or on such earlier date as the Board of Directors may 
determine. No option shall be granted under the Plan thereafter.
        
         8. AMENDMENT OF THE PLAN. The Board of Directors of the Company, except
any members participating in the Plan, may from time to time, alter, amend,
suspend or discontinue the Plan with respect to any shares as to which options
have not been granted; provided, however, that the Board of Directors may not,
without further approval by the holders of a majority of the issued and
outstanding shares of each class of voting shares of the Company:

                  (a) increase the maximum number of shares as to which options
         may be granted under the Plan (other than to reflect a stock split or
         stock dividend);

                  (b)  change the class of shares for which options may be
         granted under the Plan;

                  (c)  change the class of shares for which options may be
         granted under the Plan; receive options under the Plan;

                  (d) change the provisions of paragraph 6(c) concerning the
         option price; or

                  (e)  permit the granting of options to members of the
         Committee.

         9. APPLICATION OF FUNDS. The proceeds received by the Company from the
sale of shares pursuant to options granted hereunder will be used for general
corporate purposes.

         10.  NO OBLIGATION TO EXERCISE OPTION.  The granting of an option
hereunder shall impose no obligation upon the optionee to exercise such an
option.

         11. CONTINUANCE OF EMPLOYMENT. Neither the adoption of the Plan nor the
granting of an option  hereunder  shall impose any obligation on the Employer to
continue the employment of an optionee.

         12.  APPLICABILITY OF AMENDMENTS.  All outstanding options shall be
deemed to be amended so as to include, to the extent application thereto, any
amendments made to the Plan subsequent to the granting of such options.

         13. WITHHOLDINGS.. The Committee shall have the right to require
optionees to remit to the Company amounts sufficient to satisfy any federal,
state or local income tax withholding 

- --------
(1) January 8, 1990.

                                      - 5 -

<PAGE>   6
requirements (or make other arrangements satisfactory to the Company with regard
to such taxes) at such time as the Company deems  necessary or  appropriate  for
compliance with such laws.


                                     - 6 -

<PAGE>   1
                                                                   EXHIBIT 10.5

                           BIOANALYTICAL SYSTEMS, INC.

                    EMPLOYEE INCENTIVE STOCK OPTION AGREEMENT


         THIS AGREEMENT, made this 8th day of January, 1990, by and between
Bioanalytical Systems, Inc., an Indiana corporation with its principal office at
Purdue Research Park, West Lafayette, Indiana (hereinafter called "Company"),
and Peter T. Kissinger, residing at 111 Lorene Place, West Lafayette, Indiana
(hereinafter called the "Grantee"), pursuant to the terms, conditions and
limitations contained in the Company's Employee Incentive Stock Option Plan
(hereinafter called the "Plan"), a copy of which is attached hereto as Exhibit
A,
                                WITNESSETH THAT:

         WHEREAS, in the interests of affording an incentive to the Grantee to
give his best efforts to the Company as a key employee, the Company wishes to
provide that the Grantee shall have an option to buy Common Shares of the
Company:

         NOW, THEREFORE, it is hereby mutually agreed as follows:

         1. The Company hereby grants to the Grantee the right and option to
purchase, on the terms and conditions hereinafter set forth, all or any part of
an aggregate of 6,000 shares (hereinafter called "Subject Shares") of the
presently authorized, but unissued, or treasury, Common Shares of the Company
(hereinafter called the "Common Shares"), at a purchase price of $3.30 per
share, exercisable in whole or in part from time to time subject to the
limitation that no option may be exercised with respect to fewer than
twenty-five (25) shares unless there are fewer than twenty-five (25) shares then
subject to option hereunder, in which event any exercise must be as to all such
shares and subject to the further limitation that the options represented by
this Agreement shall be


<PAGE>   2



exercisable in four equal installments as set forth in Section 6(e) of the Plan.
The option shall expire as to all shares subject to purchase hereunder on the
5th anniversary date of this Agreement if not exercised on or before such date.

         2. Subject to the limitation specified in Section 1 hereof and in
Section 6(e) of the Plan, the Grantee may from time to time exercise this option
by delivering a written notice of exercise and subscription agreement to the
Secretary of the Company specifying the number of whole shares to be purchased,
accompanied by payment in cash, by certified check, or bank cashier's check, of
the aggregate option price of such number of shares. Such exercise shall be
effective upon receipt by the Secretary of such written notice, subscription
agreement and payment of the purchase price. Only the Grantee may exercise the
option during the lifetime of the Grantee. No fractional shares may be purchased
at any time hereunder.

         3. Upon the effective exercise of the option, or any part thereof,
certificates representing the shares so purchased, marked fully paid and
non-assessable, shall be delivered to the person who exercised the option,
except as provided in Section 6(j) of the Plan. Until certificates representing
such shares shall have been issued and delivered, the Grantee shall not have any
of the rights or privileges of a shareholder of the Company in respect of any of
such shares.

         4. In the event that, prior to the delivery by the Company of all the
Subject Shares, there shall be an increase or reduction in the number of Common
Shares of the Company issued and outstanding by reason of any subdivision or
consolidation of Common Shares or any other capital adjustment, the number of
shares then subject to this option shall be increased or decreased as provided
in Section 6(g) of the Plan.

                                      - 2 -

<PAGE>   3



         5. The option and the rights and privileges conferred by this Option
Agreement shall not be assigned or transferred by the Grantee in any manner
except by will or under the laws of descent and distribution. In the event of
any attempted assignment or transfer in violation of this Section 5, the option,
rights and privileges conferred by this Option Agreement shall become null and
void.

         6. Nothing herein contained shall be deemed to create any limitation or
restriction upon such rights as the Company would otherwise have to terminate a
person as an employee of the Company.

         7. The  option,  rights and  privileges  herein  conferred  are granted
subject to the terms and conditions set forth herein and in the Plan.

         8. Any notices to be given or served under the terms of this Option
Agreement shall be addressed to the Secretary of the Company at Purdue Research
Park, West Lafayette, Indiana, and to the Grantee at the address set forth on
page one of this Option Agreement, or such other address or addresses as either
party may hereafter designate in writing to the other. Any such notice shall be
deemed to have been duly given or served, if and when enclosed in a properly
sealed envelope or wrapper addressed as aforesaid, postage prepaid, and
deposited in the United States mail.

         9. The interpretation by the Employee Incentive Stock Option Plan
Committee, appointed by the Company's Board of Directors, of any provisions of
the Plan or of this Option Agreement shall be final and binding on the Grantee
unless otherwise determined by the Company's Board of Directors.

         10. This option,  and any Common  Shares which may be acquired  hereby,
are being  acquired  by the  Grantee  for  investment  only and not for  resale.
Neither  this  option nor the  Subject  Shares  have been  registered  under the
Securities Act of 1933 or any state securities law. None of the

                                      - 3 -

<PAGE>   4


Subject Shares may be sold, transferred, pledged, or hypothecated unless first
registered under such laws, or unless counsel for the Company has given an
opinion that registration under such laws is not required, and the Grantee
agrees to the placement of a legend to that effect upon any certificates
evidencing Common Shares acquired by him through the exercise of the option
granted hereby.

         11.  This Option  Agreement  shall be governed by the laws the State of
Indiana.

         IN WITNESS  WHEREOF,  the Company and the Grantee have sign this Option
Agreement as of the day and year first above written. 

                                             "COMPANY"

                                             BIOANALYTICAL SYSTEMS, INC.



                                             By:
                                                ------------------------------

ATTEST:

- ------------------------

                                             "GRANTEE"



                                             By: 
                                                ------------------------------

                                     - 4 -


<PAGE>   1
                                                                   EXHIBIT 10.6






May 31, 1996



Peter T. Kissinger, President
Bioanalytical Systems, Inc.
2701 Kent Avenue
West Lafayette, IN 47906

Dear Pete:

         I am pleased to inform you that Bank One, Lafayette, NA has approved
the following credit facility subject to the terms and conditions detailed
below:

BORROWER                   Bioanalytical Systems, Inc.

AMOUNT                     Up to $5 Million Dollars ($5,000,000.00)

PURPOSE                    Purchase and renovation/addition to Great Lakes 
                           Chemical Annex Building at 2801 Kent Avenue, West 
                           Lafayette, Indiana 47906

COLLATERAL                 A first mortgage on the existing Bioanalytical
                           Systems, Inc. land, building and improvements located
                           at 2701 Kent Avenue, Tippecanoe County, Indiana and a
                           first mortgage on the Great Lakes Chemical Annex
                           Building located at 2801 Kent Avenue, West Lafayette,
                           Tippecanoe County, Indiana.

TERM                       Eighteen (18) months

INTEREST RATE              Bank One, Indianapolis' prime lending rate, floating
                           plus one quarter of one percent (1/4%) calculated on
                           a 360 day basis with interest payable monthly based
                           upon the principal balance outstanding.
        
COMMITMENT FEE             One quarter of one percent (1/4%) of the mortgage 
                           amount ($12,500.00), due upon acceptance of this 
                           commitment.
<PAGE>   2



REPAYMENT                  At maturity, conversion to five (5) year term loan
                           based upon a twenty (20) year amortization funding
                           either on a conventional commercial mortgage basis or
                           through Capital One Funding Corp. With fixed
                           principal payments plus interest.

OTHER CONDITIONS           If permanent mortgage funding is through Capital One
                           Funding Corp., this commitment will be supported by
                           a Letter of Credit priced at one percent (1%) fee
                           per annum.
        
GENERAL COVENANTS AND CONDITIONS

Availability of borrowing under this credit facility is conditional upon the
following covenants and conditions which shall survive the loan closing:

1.       The Borrower certifies that their respective financial statements dated
         September 30, 1995 and March 31, 1996 are true and correct in all
         aspects and that no material adverse change has taken place as of this
         date.

2.       The Borrower agrees to maintain their primary deposit account at Bank
         One, Lafayette, NA until all indebtedness hereunder has been repaid.

3.       The Borrower agrees to submit its annual financial report prepared by
         an independent Certified Public Accountant on an audited basis within
         one hundred and twenty days of its year end until all indebtedness has
         been repaid.

4.       The Borrower agrees to provide interim financial statements prepared on
         a compiled basis within forty five (45) days of each quarter end.

5.       The Borrower agrees, prior to closing, to provide and maintain fire and
         casualty insurance acceptable to Bank One, Lafayette, NA on all
         tangible collateral with a loss payable/mortgage endorsement in favor
         of Bank One, Lafayette, NA.

6.       The Borrower agrees to provide a certified copy of the building plans
         and costs estimates prepared by a registered Architect or Engineer,
         prior to closing.

7.       The Borrower agrees to provide, prior to closing, a schedule of the
         proposed development costs including a list of all suppliers and
         subcontractors, reflecting the amount of their respective costs to the
         Borrower.

8.       The Borrower agrees that all requests for construction funds will be
         accompanies by a Certificate of Inspection certified by a registered
         Architect or Engineer affirming that the improvements are in compliance
         with the approved plans and the amount of the funding requested is
         represented by labor and material in place or delivered on sight.



<PAGE>   3



9.       The Borrower agrees to provide, prior to closing, a preconstruction
         appraisal which complies with USPAP and FIRREA appraisal guidelines
         acceptable to Bank One, Lafayette, NA, which evidences a Fair Market
         Value of at least $6,250,000.00.

10.      The Borrower agrees to provide an acceptable Title Insurance
         Commitment, prior to closing, which shows the proposed mortgage to be a
         valid first lien on the property against the Borrower's fee simple
         title with deletion of Title Insurance Company Endorsements of the
         standing exceptions as requested by the Bank of the Bank's Legal
         Counsel.

11.      The Borrower agrees to provide an acceptable mortgage survey on the
         2701 and 2801 Kent Avenue, West Lafayette, Indiana property prepared
         and certified by a professional engineer or registered land surveyor
         which reflects a complete legal description and shows the location of
         all improvements with no encroachments or violations of set back or
         property lines and all easements and rights of way; and certifies that
         the property is not located in a Special Flood Hazard Area as defined
         by the Federal Emergency Management Agency.

12.      The Borrower agrees to provide, prior to closing, finalized copies of
         all documents pertaining to the purchase of the Great Lakes Chemical
         Annex Building. These documents are to include, but are not limited to,
         public record searches for liens, encumbrances and judgments; sellers
         affidavit; copy of an executed offer to purchase; Bank One, Lafayette,
         NA reserves the right, in its sole discretion, to accept or reject any
         terms or provisions contained in these documents as a condition to
         closing this loan.

13.      The Borrower agrees to provide, upon acceptance of this commitment, a
         completed environmental disclosure document for transferal of all
         property, or an acceptable representation and warranties statement
         certifying that a disclosure document is not required pursuant to
         Indiana Public Law 166-1989. The Borrower further agrees to provide the
         Bank an indemnification against any violation of Indiana Public Law
         166-1989 resulting from a failure to comply with the above law.

14.      The Borrower agrees that this commitment is based on the Borrower's
         representation that there are no known environmental defects in the
         property to be mortgaged and that no such defects are discovered prior
         to closing.

15.      The Borrower agrees to provide an acceptable Phase I Environmental
         Audit, prior to closing, that reveals no environmental hazards or
         defects in the property to be mortgaged.

16.      The Borrower  agrees,  until this loan is paid in full,  to observe and
         maintain the following financial covenants:

         a.       RATIO OF DEBT TO TANGIBLE NET WORTH

                  The Company shall maintain the ratio of its total liabilities
                  less Subordinated Debt to its Tangible Net Worth at levels not
                  greater than 1.25 to 1.



<PAGE>   4



         b.       TANGIBLE NET WORTH

                  The Company shall maintain its Tangible Net Worth at a level
                  not less than $6,000,000.00.

         c.       DEBT SERVICE COVERAGE

                  The Company shall maintain a debt service coverage ratio of
                  not less than 1.30 to 1. For purposes of this covenant, the
                  phrase "debt service coverage ratio" means the ratio of the
                  sum of net income plus depreciation, amortization and interest
                  expense over the sum of current maturities of term debt,
                  including current capital lease payments, plus interest
                  expense, plus cash expenditures for fixed assets.

17.      The Borrower agrees to promptly pay and discharge all taxes and
         assessments levied and assessed or imposed upon its property or upon
         its income as well as other claims that, if unpaid, might by law become
         a lien or charge upon that property.

18.      The Borrower agrees to execute any additional documents that the Bank
         or the Bank's Legal Counsel deem necessary to perfect the Bank's
         collateral lien position.

19.      The Borrower agrees that the monthly payment amount may increase at any
         time it is determined that a negative amortization would be in effect.

20.      The Borrower shall have the option of prepayment without penalty.

21.      The Borrower agrees that all costs associated with originating,
         perfecting, documenting, and maintaining any and all terms of this
         commitment will be at its expense.


EVENTS OF DEFAULT/TERMINATION OF COMMITMENT.

         If the Borrower fails to pay any sum to the Bank when due, if any
representation of warranty made by the Borrower to the Bank in any document or
agreement relating to this financing proves to be in any material sense false or
misleading, if the Borrower fails to comply with any other conditions, covenants
or obligations contained herein or in any agreements or instruments relating
hereto, if any default occurs under any other agreement involving the extension
of credit to which the Borrower is a party and if such default gives the holder
of the obligation the right to accelerate the indebtedness, or if any
bankruptcy, reorganization, arrangement, insolvency, dissolution or similar
proceedings are instituted by or against the Borrower under the laws of any
jurisdiction, or if there should be a material adverse change in the Borrower's
financial condition, the Bank's commitment to extend credit and to make this
Loan shall terminate and, at the Bank's option, all sums outstanding hereunder
shall become immediately due and payable together with all accrued interest
thereon.

         Peter, once again, it is my pleasure to offer you the above commitment
on behalf of Bank One, Lafayette, NA. If the terms of this commitment are
acceptable, please acknowledge your


<PAGE>   5


acceptance by signing this original below returning it in the envelope provided
along with a check for the $12,500.00 commitment fee. If you should have any
questions about any of the terms or conditions detailed in this commitment
letter, please feel free to contact me at 423-0321. If not acted upon, this
commitment will expire after July 15, 1996.

                                          Sincerely yours,

                                          /s/ MURRAY N. MARSHALL

                                          Murray N. Marshall
                                          Vice President

                                   ACCEPTANCE

The above terms and conditions are hereby accepted this ______ day of
___________________, 1996.

Bioanalytical Systems, Inc.

By:____________________________                   


<PAGE>   1
                                                                   EXHIBIT 10.7


<TABLE>
<S>                                     <C>                                  <C>                                  
Bioanalytical Systems, Inc.             Bank One, Lafayette, NA              Loan Number #398/406
2701 Kent Avenue                        201 Main Street                      Date: July 19, 1996
West Lafayette, IN 47906                Lafayette, IN 47901                  Maturity Date: January 19, 1998
                                                                             Loan Amount: $4,720,000.00
                                                                             Renewal Of

BORROWER'S NAME AND ADDRESS             LENDER'S NAME AND ADDRESS
"I"includes each borrower above,        "You"  means the lender, its
jointly and severally.                  successors and assigns
</TABLE>


For value received, I promise to pay to you, or your order, at your address
listed above the PRINCIPAL sum of Four Million Seven Hundred Twenty Thousand
and no/100 Dollars $4,720,000.00.  

<TABLE>
<S> <C>
[ ] SINGLE ADVANCE: I will receive all of this principal sum on ____________________.  No additional
    advances are contemplated under this note.  
[X] MULTIPLE ADVANCE: The principal sum shown above is the maximum amount of principal I can borrow
    under this note.  On July 19, 1986 I will receive the amount of $1,972,002.87 and future
    principal advances are contemplated.  
    Conditions: the conditions for future advances are _________________________________________________________________ 
[ ] OPEN END CREDIT: You and I agree that I may borrow up to the maximum amount of principal more 
    than one time.  This feature is subject to all other conditions and expires on _______________________.  
[x] CLOSED END CREDIT: You and I agree that I may borrow up to the maximum only one time (and
    subject to all other conditions).
INTEREST: I agree to pay interest on the outstanding principal balance from July 19, 1996 
         at the rate of 8.5%.  
[x] VARIABLE RATE: This rate may them change as stated below:
    [x] INDEX RATE: The future rate will be 1/4% above the following index
        rate: Bank One, Indianapolis, NA prime lending rate 
    [ ] NO INDEX: The future rate will not be subject to any internal or external index.  It will
        be entirely in your control.  
    [x] FREQUENCY AND TIMING.  The rate on this note may change as often as daily.  A change 
        in the interest rate will take effect on the same day Bank One, Indianapolis, NA prime rate changes.
    [ ] LIMITATIONS: During the term of this loan, the applicable annual interest rate will not be more 
        than _________% or less than ___________%. The rate may not change more than _________% each ______________.  
    EFFECT OF VARIABLE RATE: A change in the interest rate will have the following effect on the payments: 
    [ ] The amount of each scheduled payment will change.  [x] The amount of the final payment will change.  
    [ ] _________________________________________
ACCRUAL METHOD: Interest method will be calculated on a 360 day basis.
POST MATURITY RATE: I agree to pay interest on the unpaid balance of this note owing after maturity, and until 
    paid in full, as stated below: 
    [ ] on the same fixed or variable rate basis in effect before maturity (as indicated
        above) 
    [x] at a rate equal to Four (4%) percent above Bank One, Indianapolis, NA prime lending rate
[x] LATE CHARGE: If a payment is made more than 15 days after it is due, I agree to pay a late charge of 5% of 
        the payment amount, subject to a minimum of $25.00 and a maximum of $250.00.
[ ] ADDITIONAL CHARGES: In addition to interest, I agree to pay the following charges which   
    [ ] are    [ ] are not included in the principal amount above:
PAYMENTS: I agree to pay this note as follows:
[x] INTEREST: I agree to pay accrual interest commencing August 19, 1996 and continuing on the 19th day of each 
    month thereafter.  
[x] PRINCIPAL: I agree to pay the principal on January 19, 1998 
[ ] INSTALLMENTS: I agree to pay this note on _________ payments.  The first payment will be in the amount of
    $_______________ and will be due ________________.  A payment of $________________ will be due
    _______________________ thereafter.  The final payment of the entire unpaid balance of principal and interest
    will be due ________________________.
[ ] UNPAID INTEREST: Any accrued interest note paid when due (whether due by reason of a schedule of payments or 
    due because of Lender's demand) will become part of the principal hereafter, and will bear interest at the
    interest rate in effect from time to time as provided for in this agreement.
ADDITIONAL TERMS:

 This loan is issued under the provisions of a letter/Loan Agreement dated May 31, 1996.

 This loan is accrued by a mortgage dated July 19, 1996.


[ ] SECURITY.  This note is a separately secured by (describe separate   PURPOSE: The purpose of this loan is purchase and 
document by type and date).                                              renovation/addition to Great Lakes Chemical Annex Bldg.
                                                                         __________________________________________________________
(This section is for your internal use.  Failure to list a               SIGNATURES: I AGREE TO THE TERMS OF THIS NOTE 
separate security document does not mean the                             (INCLUDING THOSE ON PAGE 2).  I have received a copy on 
agreement will not secure this note.)                                    today's date.

                                                                         Bioanalytical Systems, Inc.


Signature for Lender                                                    By:    /s/ LINA L. REEVES-KERNER

Bank One, Lafayette, NA                                                        VICE PRESIDENT


By:    /s/  MURRAY N. MARSHALL, Vice President                          __________________________________________________________
</TABLE>


<PAGE>   1
                                                                   EXHIBIT 10.8

                                 





July 22, 1992


Peter T. Kissinger, President
Bioanalytical Systems, Inc.
2701 Kent Avenue
West Lafayette, IN  47906

Dear Pete,

         I am pleased to inform you that Bank One, Lafayette, NA has approved
the following credit facility subject to the terms and conditions detailed
below:

Borrower           :     Bioanalytical Systems, Inc.

Amount             :     Up to Seven Hundred Thousand Dollars ($700,000.00)

Purpose            :     Payoff first mortgage bonds on the 2701 Kent Avenue,
                         West Lafayette, Indiana commercial facility held by 1st
                         National Bank of Louisville.

Collateral         :     A first mortgage on all land, building and
                         improvements on the 2701 Kent Avenue, West Lafayette,
                         Indiana commercial property.

Term               :     Seven (7) years.

Interest Rate      :     Options as follows:

                         1.       Bank One, Indianapolis's prime lending rate,
                                  floating plus one and one quarter percent (1
                                  1/4%),  calculated  on a 360 day basis  with
                                  interest payable monthly, or
                         
                         2.       A fixed  rate of 8 1/2%  for a term of three
                                  years, or
                         
                         3.       A fixed rate of 9% for a term of five years.
                         
                         During the term of this mortgage, the interest rate
                         will never exceed  twelve (12%)  percent and will 
                         never be lower than seven (7%) percent.
                         
Repayment          :     Interest Rate Option:

                           
<PAGE>   2


Page No. 2
Bioanalytical Systems, Inc.
July 22, 1992

                         1.   Monthly payments of $10,651.00 which include
                              principal and interest commencing thirty (30) days
                              from the date of the mortgage or annual payments
                              of $100,000.00 commencing one (1) year from the
                              date of the mortgage with interest payable monthly
                              commencing thirty (30) days from the date of the
                              mortgage, or

                         2.   Monthly payments of $11,086.00 which include
                              principal and interest commencing thirty (30) days
                              from the date of the mortgage or annual payments
                              of $100,000.00 commencing one (1) year from the
                              date of the mortgage with interest payable monthly
                              commencing thirty (30) days from the date of the
                              mortgage, or

                         3.   Monthly payments of $11,263.00 which include
                              principal and interest commencing thirty (30) days
                              from the date of the mortgage or annual payments
                              of $100,000.00 commencing one (1) year from the
                              date of the mortgage with interest payable monthly
                              commencing thirty (30) days from the date of the
                              mortgage.

         This commitment will be supported by the enclosed Credit Agreement
which will be executed at the closing.

         Pete, it is once again my pleasure to offer Bioanalytical Systems, Inc.
the above commitment on behalf of Bank One, Lafayette, NA. If the terms of this
commitment are acceptable, please acknowledge your acceptance by signing this
original below and returning it in the envelope provided. If you should have any
questions about any of the terms or conditions detailed in this commitment
letter, please feel free to contact me at 423-0321.

                                              Very Truly Yours,


                                              /s/ MURRAY N. MARSHALL

                                              Murray N. Marshall
                                              Vice President


MNM:tjd

                                      - 2 -

<PAGE>   3


Page No. 3
Bioanalytical Systems, Inc.
July 22, 1992

                                   ACCEPTANCE

         The above terms and conditions are hereby accepted this 24th day of
July, 1992.

BIOANALYTICAL SYSTEMS, INC.


BY: /s/ PETER T. KISSINGER
                          President

Interest Rate Option:                           Repayment Option:
                                                                 
_____1.  Prime + 1 1/4%                         __X__1.  Monthly 
                                                                 
_____2.  Fixed 3 yrs @ 8 1/2%                   _____2.  Annual  

__X__3.  Fixed 5 yrs @ 9% 








                                      - 3 -


<PAGE>   1
                                                                    EXHIBIT 10.9
                                CREDIT AGREEMENT

 BANK ONE, LAFAYETTE, NA, a national banking association (the "Bank") and
Bioanalytical Systems, an Indiana corporation (the "Company") hereby enter into
this Credit Agreement ("Agreement") as of this 24th     day of, July     , 1992.

I.   CREDIT FACILITY.

     A.   THE TERM LOAN.  The Bank agrees to make a term loan to the
Company in the principal amount of Three Hundred Thousand and no/l00 Dollars
($300,000.00) (the "Term Loan").

          1.    Interest Rate.  The Term Loan shall bear interest until 
     maturity at a per annum rate equal to the Prime Rate plus One and
     One-quarter percent (l 1/4%) or a fixed rate of Eight and 50/l00 percent
     (8.50%) or a fixed rate of nine and 00/l00 (9%) percent calculated on the
     basis of a 360 day year.  "Prime Rate" is the rate of interest established
     and quoted by Bank One, Indianapolis, NA from time to time as its Prime
     Rate, such rate to change contemporaneously with each change in such
     established and quoted rate; provided, that it is understood that the
     Prime Rate shall not necessarily be representative of the rate of interest
     actually charged by the Bank on any loan or class of loans.  After
     maturity, whether at scheduled maturity or at maturity resulting from
     acceleration upon the occurrence of an Event of Default (as hereinafter
     defined), and until paid in full, the Term Loan shall bear interest rate
     per annum equal to the prime rate plus four (4%) percent.
        
          2.    Principal and Interest Payments.

          The Company shall repay the principal amount of the Term Loan in 
     monthly installments beginning on August 24, 1992, and on the 24th day of
     each successive month thereafter until July 24, 1997, on which date the
     entire unpaid principal balance of the Term Loan and all accrued interest
     thereon shall be due and payable.  Monthly installments would be $4,565.00
     based upon a variable rate at one and one-quarter percent above the Prime
     Rate, or $4,751.00 based upon a fixed interest rate of 8 1/2% for a term
     of three (3) years, or $4,827.00 based upon a fixed interest rate of 9%
     for a term of five (5) years with monthly payments which include principal
     and interest beginning thirty (30) days from the date of the note.
        
          The Term Loan shall be repaid on the 24th day of each consecutive 
     month in the aggregate amount for principal and interest of Four Thousand
     Eight Hundred and Twenty Seven Dollars ($4,827.00) each based on a seven
     (7) year level payment amortization schedule.  In the event the Prime Rate
     changes such that the amount of such payment does not adequately cover
     interest, the Bank reserves the right to adjust the amount of such monthly
     payments.
        
          "Banking Day" is a day on which the principal office of the Bank in
     Lafayette, Indiana is open for the purpose of conducting substantially all 
     of its banking activities.
<PAGE>   2


           3.    Use of Proceeds of Term Loan.   Proceeds of the Term Loan
     shall be used to payoff first mortgage bonds on the 2701 Kent Avenue,
     West Lafayette, Indiana commercial facility held by 1st National Bank
     of Louisville.

II.   REPRESENTATIONS AND WARRANTIES.  The company hereby represents and
warrants to the Bank that:

          A.   Corporate Existence and Authority.  The Company is a corporation
duly organized and validly existing under the laws of the State of Indiana.

          B.   Proper Authorization and No Conflict.  The execution and
delivery of this Agreement and the promissory notes evidencing the Term Loan
and the collateral documents described herein (all such agreements and
documents called the "Loan Documents") and the performance by the Company of
its obligations thereunder, are within the Company's corporate powers, have
been duly authorized by all necessary corporate action, and do not and will not
contravene or conflict with any provision of law, the Articles of Incorporation
or By-Laws of the Company, or any agreement binding upon the Company or its
property.

          C.   Valid and Binding Nature of Loan Documents.  The Loan Documents
are the legal, valid and binding obligations of the Company, enforceable
against the Company in accordance with their respective terms, except to the
extent that the enforcement thereof may be limited by bankruptcy or other laws
enacted for the relief of debtors generally.

          D.   Financial Statements.  All financial statements and other
financial data which have been or will be furnished to the Bank by the Company
are and will be true and correct, reflect and will reflect fairly the financial
condition of the Company, and have been and will be prepared in accordance with
generally accepted accounting principals consistently applied.

          E.   Litigation and Contingent Liabilities.  No litigation or other
legal or regulatory proceedings are pending or threatened against the Company
which, if adversely determined, would have a material adverse effect on the
financial condition of the Company or on the results of its operations.

          F.   Taxes.  All required tax returns of the Company have been filed.
All taxes which are due and payable have been paid, together with interest and
penalties, if any.

          G.   Hazardous Substances.  To the best knowledge of the Company
after due inquiry and investigation, there are no underground storage tanks of
any kind on any premises owned or occupied by or under lease to the Company,
and there are no tanks, drums or other containers of any kind on premises owned
or occupied by or under lease to the Company, the contents of which are unknown
to the Company, and no premises owned or occupied by or under lease to the
Company have ever been used, and as of the date of this Agreement, no such
premises are being used, for any activities involving the use, treatment,
transportation, generation, storage or disposal of any Hazardous 

                                     -2-

<PAGE>   3


Substances in hazardous quantities, and no Hazardous Substances in hazardous
quantities have been released on any such premises, nor is there any threat of
release of any Hazardous Substances in hazardous quantities on any such
premises.  For purposes of this Agreement, "Hazardous Substances" means any
hazardous or toxic substance regulated by any federal, state or local statute.
        
III.   COLLATERAL.  The Term Loan will be secured by:

       A.   Mortgage.  A real estate mortgage on the real property of the
company located at 2701 Kent Avenue, West Lafayette, Tippecanoe County, State
of Indiana, and more particularly described in the Real Estate Mortgage,
executed by the Company in favor of the Bank (the "Mortgage").

       All of the documents described in this Section shall be in form and 
substance acceptable to the Bank.

IV.   AFFIRMATIVE COVENANTS.  Until the Term Loan is paid in full, the
Company agrees that it will:

      A.   Financial Statements.   Furnish the Bank within One Hundred and
Twenty (120) days after the close of each fiscal year audited financial
statements of the Company for such fiscal year prepared by independent
certified public accountants approved by the Bank, and within forty five (45)
days after the close of each month a balance sheet and statement of income for
the month and for the partial fiscal year ended as of the end of the month all
in reasonable detail and certified by the chief financial officer of the
Company as accurate and as having been prepared in accordance with generally
accepted accounting principals, to the extend applicable, consistently applied,
and with such other financial information as the Bank may request from time to
time.
        
       B.   Audit.  At all reasonable times permit the Bank and its duly
authorized representatives to examine and audit the books, records and physical
properties of the Company.

       C.   Discharge Liabilities.  Pay and discharge all current
obligations as they mature and all taxes, assessments, and other governmental
charges or levies before penalties attach, except such as are being
appropriately contested in good faith and for which adequate reserves are being
maintained.

       D.   Insurance.  Maintain adequate insurance such as is customarily
maintained by similar businesses and as may be reasonably requested by the
Bank, with all policies naming the Bank as lender loss payee.

       E.   Notice.   Inform the Bank immediately of any occurrence,
including litigation, which may have a material adverse effect on the financial
condition of the Company.

                                     -3-

<PAGE>   4


       F.   Hazardous Substances.  Immediately notify the Bank of the
commencement of any use, treatment, transportation, generation, storage or
disposal of any Hazardous Substance (defined above) in hazardous quantities in
its operations or the operations of any subsidiary, and cause any Hazardous
Substances which are now or may hereafter be used or generated in the
operations of the Company or any subsidiary in hazardous quantities to be
accounted for and disposed of in compliance with all applicable federal, state,
and local laws and regulations.  Further, the Company shall also notify the
Bank immediately upon obtaining knowledge that: (a) any premises which have at
any time have been owned or occupied by or have been under lease to the Company
or any subsidiary are the subject of an environmental investigation by any
federal, state or local governmental agency having jurisdiction over the
regulation of any Hazardous Substances, the purpose of which investigation is
to quantify the levels of Hazardous Substances located on such premises, and
(b) the Company or any subsidiary has been named or is threatened to be named
as a party responsible for the possible contamination of any real property or
ground water with Hazardous Substances, including but not limited to, the
contamination of past and present waste disposal sites.  The Company shall
establish reserves (determined in accordance with generally accepted accounting
principals) in the amount of such potential liability.

       G.   Maintain Existence.  Maintain the corporate existence of the
Company.

       H.   Banking Accounts.  Maintain the company's deposit account with
Bank One, Lafayette, NA until all indebtedness under this agreement has been
repaid.

V.   NEGATIVE COVENANTS.  Until the Term Loan is paid in full, the
company will not:

       A.   Merge.  Merge or consolidate with or into any other entity or
acquire any equity interest in any other business entity, without prior written
Bank approval.

       B.   Hazardous Substances.  Allow or permit to continue the release
or threatened release of any Hazardous Substances on any premises owned or
occupied by or under lease to the Company or any subsidiary.

       C.   Debt.  Incur or permit to exist any indebtedness for borrowed
money except to the Bank (other than in the normal course of business), without
prior written Bank approval.

       D.   Guaranties and Loans.  Assume, guarantee, or endorse any
obligation of any other person, firm or corporation, except negotiable
instruments for deposit in the ordinary course of business, or loan or make any
advances to any other person or entity except credit accommodations to
customers or vendors in the ordinary course of business and reasonable salary
advances to non-executive employees, without prior written Bank approval.

       E.   Liens.  Create or permit any liens on the Company's property,
except liens in favor of the Bank and any other liens permitted to exist with
the Bank's prior written approval.


                                     -4-

<PAGE>   5


VI.   DEFAULT AND REMEDIES.

      A.   Events of Default.  An Event of Default shall occur hereunder
if:

           1.    Non Payment  the Company fails to pay within 30 days when
due any installment of principal or interest on the Term Loan; or

           2.    Negative and Financial Covenant Default  the Company fails or
omits to perform, observe, or comply with any of the terms, agreements,
conditions or covenants contained in the Section of this Agreement regarding
Negative Covenants, or financial covenants in the Section of this Agreement
regarding Affirmative Covenants, or in any agreement executed in connection
herewith; or
        
           3.    Affirmative Covenant Default the Company fails or omits to
perform, observe, or comply with any of the terms, agreements, conditions or
covenants contained in the Section of this Agreement regarding Affirmative
Covenants other than financial covenants and the failure of the Company to cure
such failure of omission within 30 days after delivery of written notice of
such a failure or omission by the Bank to the Company.
        
           4.    Misrepresentation  any warranty, representation, certificate
or statement of the Company made in or pursuant to this Agreement is
false or materially misleading in any material respect; or

           5.    Cross-Default  the Company defaults under any other agreement,
indenture, instrument or note for borrowed money, the effect of which
accelerates or entitles the holder of any such indebtedness to accelerate the
maturity thereof; or
        
           6.    Transfer of Assets  any assignment, transfer, or other
disposition of any interest in the Company occurs outside the ordinary course
of business without the express written consent of the Bank; or
        
           7.    Dissolution  if the dissolution, termination of existence, or
business failure of the Company occurs; or

           8.    Receiver  the Company consents to the appointment of a
receiver, liquidator, assignee, trustee or custodian for the Company, or a
receiver, liquidator, assignee, trustee or custodian takes possession of any
substantial part of the property of the Company, or if the Company makes any 
assignment for the benefit of any creditors; or

           9.    Liens  any property of the Company is subject to attachment,
garnishment, lien, or other legal process (except the lien in favor of the 
Bank or any other liens permitted by the Bank in writing or pursuant to the 
terms of this Agreement); or

                                     -5-

<PAGE>   6


           10.    Bankruptcy  any proceedings under any bankruptcy or
insolvency laws are commenced by or against the Company, in the event such
proceedings are commenced against the Company have not been dismissed within
sixty (60) days after their institution.
        
     B.    Remedies.  Upon the occurrence of a Event of Default 
described in the subsection above captioned "Bankruptcy," the outstanding
principal balance of the Term Loan together with accrued interest thereon shall
become immediately due and payable, all without notice of any kind.  Upon the
occurrence of any other Event of Default described above, the Bank may, at its
option, declare immediately due and payable the outstanding principal balance
of the Term Loan, together with interest thereon, which shall be immediately
due and payable without demand or notice of any kind.  Upon the occurrence of
an Event of Default, the Bank, in addition to any other rights or remedies it
may have, shall have and may exercise immediately and without demand any and
all rights and remedies granted to the Bank under the Loan Documents.
        
VII. CONDITIONS PRECEDENT.  This Agreement shall become effective and
the Bank shall make the Term Loan only if no Event of Default has occurred and
is continuing and upon receipt of the following in form and substance
satisfactory to the Bank:

     A.  The Term Note evidencing the term loan and real estate mortgage.

     B.  A certificate of the Secretary of the Company certifying the name of 
the officer or officers of the Company authorized to sign this Agreement and
the other Loan Documents to which the Company is a party, together with a
sample of the true signature of each such person.
        
     C.  A written appraisal acceptable to the Bank that meets all recent OCC 
and FIRREA lending appraised guidelines, reflecting a minimum fair market value
of $875,000.00.
        
     D.  A Title Insurance commitment, which shows that the proposed mortgage 
will be a valid first lien on the property (following the repayment of the
first mortgage bonds) against the company's fee simple title with deletion of
Title Insurance Company Endorsements of the standing exceptions as requested by
the Bank or the Bank's Legal Counsel.
        
     E.  An acceptable Phase I Environmental Audit that reveals no environmental
hazards or defects in the property to be mortgaged.

     F.  Such other documents reasonably requested by the Bank.

VIII. MISCELLANEOUS.  The Company shall reimburse the Bank for all costs and
expenses incurred by the Bank in connection with the Term Loan, including but
not limited to attorneys' fees (in the case of enforcement), appraisal fees,
filing fees, lien searches and credit investigations.  No delay or omission on
the part of the Bank to exercise any right or remedy hereunder or at law or in
equity shall impair such right or power or be construed as a waiver of any
Event of Default, or shall any single or partial exercise of any right or
remedy by the Bank preclude any other or further 

                                     -6-

<PAGE>   7




exercise thereof.  No amendment, modification, waiver or consent of the Bank
with respect to any provisions of this Agreement or any other Loan Document
shall be effective unless in writing and signed by the Bank.  This Agreement
shall be binding upon and shall inure to the benefit of the Company and the
Bank in their respective successors and assigns.  This Agreement shall be
governed by the laws of the State of Indiana.


                                Bioanalytical Systems, Inc.


                                By:   \S\PETER T. KISSINGER
                                      ------------------------------
                                      Peter T. Kissinger, Pres.
                                      ------------------------------
                                      [printed name and title]



                                BANK ONE, LAFAYETTE, [national association]

Attest:

\S\SUE E. HUMPHREY-OAKLEY       By:   \S\MURRAY N. MARSHALL, V.P.
- -------------------------             -----------------------------
Sue E. Humphrey-Oakley, Comm. Ln. Proc.   Murray N. Marshall, V.P.
[printed name and title]                  [printed name and title]





                                     -7-

<PAGE>   1
                                                                  EXHIBIT 10.10

                                                                 PROMISSORY NOTE
BANK1ONE                                      
                                              
Note number: 00182    Date: July 24, 1992                    Amount $ 300,000.00

For value received, receipt of which is hereby acknowledged the undersigned
jointly and severally promise to pay to the order of BANK ONE Lafayette, NA,
201 Main Street, Lafayette, Indiana 47901 (hereinafter "BANK ONE") Three
hundred thousand and 00/100 Dollars with interest from 7/24/92 until due as
hereinafter provided.

RATE OF INTEREST AND ITS CALCULATION

[x] Nine and 00/100 percent (9.0%) per annum

[ ] BANK ONE prime lending rate: Plus ______________________ percent per annum

                               : Times _____________________ percent per annum

If the rate of interest on this note is to fluctuate with the BANK ONE prime
lending rate, the rate of interest will be adjusted to reflect the change in
the BANK ONE prime lending rate:

  [ ] on the first day of each month following the month in which the BANK ONE
      lending rate changes,

  [ ] on the same day as the BANK ONE prime lending rate changes.

"Prime lending rate" means the rate announced from time to time by BANK ONE as
its prime lending rate, which rate may not be the lowest rate offered by BANK
ONE.  Interest shall be calculated on a 30/360 day year basis and is based on
the actual number of days which elapse during the lending period.

TIME AND METHOD OF PAYMENT

[ ] PRINCIPAL AND INTEREST PAYABLE ON DATE CERTAIN.  The principal balance
    is due and payable on ______________________.

    Interest is due and payable [ ] at maturity               or      [ ]
    beginning _______________________

    and __________________________________________ thereafter until the
    principal balance is paid.

[ ] PRINCIPAL PAYABLE ON DEMAND, INTEREST PAYABLE PERIODICALLY.  Principal
    is due and payable beginning ____________ and ___________ thereafter until
    demand is made for payment of principal at which time principal and any 
    unpaid interest shall be immediately due and payable.

[x] PRINCIPAL AND INTEREST PAYABLE PERIODICALLY. Principal is payble on demand
    but until such time as demand for payment is made, principal plus accrued 
    interest thereon is due in installments as hereinafter provided:

    Payment frequency:        [x] Monthly     [ ] Quarterly    [ ] Semiannually
                              [ ] Annually

    Type payment: [x] Payment includes both principal and interest      
    [ ] Payment amount is principal -- interest is calculated

Date of first payment August 24, 1992                            
Payment amount $4,827.00

After the principal sum is due, whether by acceleration or otherwise, the
interest rate will be the BANK ONE prime lending rate plus Four and 00/100
percent.

This note is [x] Secured [ ] Unsecured  This note [x] is [ ] is not issued
under the provisions of a loan agreement dated July 22, 1992 and Credit
Agreement dated July 24, 1992.

The undersigned have deposited with BANK ONE the following property and/or have
given a security interest in the following property: (not applicable if note is
unsecured) A Mortgage dated July 24, 1992.

  1.     The above-described property (if any), all credits, deposits, accounts
or money of any of the undersigned and all other property belonging to  or in
which any of the undersigned has any interest, now or hereafter, in the
possession or control of BANK ONE, shall be held by BANK ONE as security for
the payment of this note and of every other liability now or hereafter existing
of any of the undersigned to BANK ONE, absolute or contingent, due or not due,
and in whatsoever manner acquired by or accruing to BANK ONE (hereinafter
"obligations").

  2.     At the option of BANK ONE, all obligations shall become immediately,
due and payable without notice or demand upon the occurrence of any of the
following events of default: (a) failure of the undersigned to make payments
when due of the principal or interest of this note and/or any obligations; (b)
failure of the undersigned to furnish satisfactory additional collateral as
hereinafter agreed; (c) failure of the undersigned or any endorser or guarantor
hereof to comply with any of the terms and conditions of this note and/or any
obligations of the undersigned or contained in any security agreement or device
securing this note or any obligations; (d) death, dissolution, termination of
existence, insolvency, business failure, appointment of receiver for the
undersigned or any property of the undersigned, assignment for the benefit of
creditors or commencement of any proceeding under any bankruptcy,
reorganization, arrangement or liquidation law, or if such proceedings are
commenced by a creditor and remain undismissed for thirty  days; (e) failure of
any of the undersigned to  pay when due any premium on any policy of life or
other insurance pledged hereunder, or held in connection with any security
hereof; (f) BANK ONE deeming itself insecure and in good faith believing that
the prospect of payment or performance is impaired; (g) the institution of any
garnishment proceedings by attachment, levy or otherwise against any deposit
balance maintained or any property deposited with BANK ONE by the undersigned
or any endorser or guarantor hereof; (h) failure of the undersigned to furnish
BANK ONE within thirty (30) days after written request by BANK ONE, current
financial statements in form satisfactory to BANK ONE or (i) any
representation, warranty, statement, report, or application made or furnished,
by the undersigned providing to have been false, or erroneous in any material
respect at the time of the making thereof.

  3.     No delay or omission on the party of BANK ONE in exercising any right
hereunder shall operate as a waiver of such right or of any other right under
this note.  A waiver on any one occasion shall not be construed as a bar to or
waiver of any such right and/or remedy on any future occasion.

  4.     The undersigned and each endorser and guarantor of this note, or the
obligation represented hereby waive presentment, demand, notice , protest and
all other demands and notices in connection with the delivery, acceptance,
performance, default or enforcement of this note, and assent to any extension
or postponement of the time of payment or any other indulgence, and/or to the
addition or release of any other party or person primarily of secondarily
liable.

  5.     This note shall be governed by and construed in accordance with the
laws of the state in which BANK ONE has its principal office in all respects.

  6.     The undersigned will pay on demand all costs of collection and
attorneys' fees incurred or paid by BANK ONE in enforcing this note when the
same has become due whether by acceleration or otherwise.

  7.     All parties to this note, including endorsers are jointly and
severally liable.  All sums that become due hereunder, whether principal,
interest, attorneys fees or other costs of collection shall be paid without
relief from valuation and appraisement laws.


     (Paragraphs 8 through 12 are applicable only if this note is secured)

  8.     When the obligations become due, whether by acceleration or otherwise,
and at any time thereafter, BANK ONE shall have all of the remedies provided in
the security documents including the remedies as a secured party under the
Uniform Commercial Code.  Unless the collateral is perishable or threatens to
decline speedily in value or is of a type customarily sold on a recognized
market, BANK ONE will give the undersigned reasonable notice of the time and
place of any public sale thereof or of the time after which any private sale or
other intended disposition is to be made.  The requirement of reasonable notice
shall be met if such notice is mailed, postage prepaid, to the last known
address of the undersigned at least ten days before the time of the sale or
disposition.

  9.     Right is expressly granted to BANK ONE at its option to transfer at
any time to itself or to its nominee any securities pledged hereunder, to
receive the income thereon, and hold the same as security hereto, or apply it
on the principal or interest which has become due hereon of which has become
due on any liability secured hereby, whether by acceleration or otherwise, and
in the case of voting shares or interests pledged hereunder, to vote the same
when BANK ONE deems the exercise of such power necessary to maintain or protect
such collateral.

  10.    When the obligations become due, whether by acceleration or otherwise,
and at any time thereafter, BANK ONE may, at its option, demand, sue for,
collect, or make any compromise or settlement it deems desirable with reference
to collateral held hereunder.  BANK ONE shall not be bound to take any steps
necessary to preserve any rights in the collateral against prior parties,  in
as much as the undersigned agree to assume such responsibility.

    11.    The undersigned will deliver to BANK ONE satisfactory additional
collateral should BANK ONE so require.

    12.    The undersigned and each endorser and guarantor of this note or the
obligations represented hereby agree that BANK ONE may retake possession of any
collateral without prior judicial hearing or process, and hereby expressly
waive any right to such judicial hearing or process and hereby assent to any
substitution, exchange or release of collateral.

        BANK ONE is an affiliate of BANC ONE CORPORATION, Columbus, Ohio

BIOANALYTICAL SYSTEMS, INC., an Indiana Corporation

By: /s/ PETER T. KISSINGER
    Peter T. Kissinger, President



<PAGE>   1
                                                                  EXHIBIT 10.11
April 15, 1997


Peter T. Kissinger, President
Bioanalytical Systems Inc.
2701 Kent Avenue
West Lafayette, IN 47906

Dear Pete:

 I am pleased to inform you that BANK ONE, INDIANA, NA has approved the
following credit facility subject to the terms and conditions detailed below:

BORROWER                      Bioanalytical Systems Inc.

AMOUNT                        Two Million Two Hundred Thousand and 00/100
                              Dollars ($2,200,000.00).  Up to $200,000.00 of
                              this amount will be available for issuance of
                              Letters of Credit.

FACILITY TYPE                 Line of credit to support general working capital
                              requirements.

COLLATERAL                    A Security Agreement covering a priority lien on
                              inventory and receivables and a Real Estate
                              Mortgage on the Tech Center property located at
                              1205 Kent Avenue, West Lafayette, IN.

TERM                          Through March l, 1998

INTEREST RATE                 BANK ONE, INDIANA, NA prime rate, floating plus
                              one-quarter of one percent (1/4%), calculated on
                              a 360 day basis with interest payable monthly
                              based upon the principal balance outstanding.

GUARANTOR                     None

COMMITMENT FEES               None

<PAGE>   2
Bioanalytical Systems Inc.
April 15, 1997
Page 2


GENERAL COVENANTS AND CONDITIONS

Availability of borrowing under this credit facility is conditional upon the
following covenants and conditions which shall survive the loan closing:

1.               The Borrower certifies that their financial statements dated
                 September 30, 1996 and December 31, 1996 are true and correct
                 in all aspects and that no material adverse change has taken
                 place as of this date.

2.               The Borrower agrees to maintain their main deposit account at
                 BANK ONE, INDIANA, NA until all indebtedness hereunder has
                 been repaid.

3.               The Borrower agrees to submit its annual financial report
                 prepared by an independent Certified Public Accountant on an
                 audited basis within 120 days of its year end until all
                 indebtedness has been repaid.

4.               The Borrower agrees to provide quarterly interim financial
                 statements prepared on a compiled basis within 45 days of
                 quarter end.

5.               The Borrower agrees, prior to closing, to provide and maintain
                 fire and casualty insurance acceptable to BANK ONE, INDIANA,
                 NA on all tangible collateral with a loss payable endorsement
                 in favor of BANK ONE, INDIANA, NA.

6.               The Borrower agrees to promptly pay and discharge all taxes
                 and assessments levied and assessed or imposed upon its
                 property or upon its income as well as other claims that, if
                 unpaid, might by law become a lien or charge upon that
                 property.

7.               The Borrower agrees not to guaranty the indebtedness of any
                 individual, corporation, or subsidiary.

8.               The Borrower agrees to execute any additional documents that
                 the Bank or the Bank's Legal Counsel deem necessary to perfect
                 the Bank's collateral lien position.

9.               The Borrower agrees that all costs associated with
                 originating, perfecting and documenting any and all terms of
                 this commitment will be at its expense.

10.              Tangible Net Worth.  Maintain its shareholders' equity (less
                 allowance for goodwill, patents, trademarks, and other
                 intangible assets) at a level not less than $4,700,000.00.
<PAGE>   3

Bioanalytical Systems Inc.
April 15, 1997
Page 3

11.              Debt to Tangible Net Worth.  Maintain the ratio of its total
                 liabilities to its shareholders' equity (less allowance for
                 goodwill, patents, trademarks, and other intangible assets) at
                 a level not greater than 1.80 to 1.0.

12.              Debt Service Coverage.  For each period of four consecutive
                 fiscal quarters, the Company shall maintain a debt service
                 coverage ratio of not less than 1.2 to 1.0.  For purposes of
                 this covenant the phrase "debt service coverage ratio" means
                 the ratio of the sum of net income plus depreciation,
                 amortization and interest expense over the sum of current
                 maturities of term debt, including current capital lease
                 payments, plus interest expense and expenditures for fixed
                 assets.

EVENTS OF DEFAULT/TERMINATION OF COMMITMENT.

         If the Borrower fails to pay any sum to the Bank when due, if any
representation or warranty made by the Borrower to the Bank in any document or
agreement relating to this financing proves to be in any material sense false
or misleading, if the Borrower fails to comply with any other conditions,
covenants or obligations contained herein or in any agreements or instruments
relating hereto, if any default occurs under any other agreement involving the
extension of credit to which the Borrower is a party and if such default gives
the holder of the obligation the right to accelerate the indebtedness, or if
any bankruptcy, reorganization, arrangement, insolvency, dissolution or similar
proceedings are instituted by or against the Borrower under the laws of any
jurisdiction, or if there should be a material adverse change in the Borrower's
financial condition, the Bank's commitment to extend credit and to make these
Loans shall terminate and, at the Bank's option, all sums outstanding hereunder
shall become immediately due and payable together with all accrued interest
thereon.

         Pete, it is my pleasure to offer Bioanalytical Systems Inc. the above
commitment on behalf of BANK ONE, INDIANA, NA.  If the terms of this commitment
are acceptable, please acknowledge your acceptance by signing this original
below and returning it in the envelope provided.  If you should have any
questions about any of the terms or conditions detailed in this commitment
letter, please feel free to contact me at 423-0490.  If not acted upon, this
commitment will expire after May 15, 1997.

                                        Sincerely yours,

                                        \S\TONY S. ALBRECHT

                                        Tony S. Albrecht
                                        Vice President
<PAGE>   4

Bioanalytical Systems Inc.
April 15, 1997
Page 4

                                   ACCEPTANCE

The above terms and conditions are hereby effective this 29th day of April   , 
1997.

BIOANALYTICAL SYSTEMS INC.


By: \S\PETER T. KISSINGER
    ----------------------------------
         Peter T. Kissinger, President

<PAGE>   1
                                                                  EXHIBIT 10.12

<TABLE>
<S>                                   <C>                                   <C>
BORROWER'S NAME AND ADDRESS           LENDER'S NAME AND ADDRESS             Loan Number:  ________________
"I" includes each borrow above,       "You" means the lender, its           Date:  May 9, 1997
jointly, and severally.               successors and assigns.               Maturity Date:  March  1, 1998
Bioanalytical Systems, Inc.           Bank One, Indiana, NA                 Loan Amount:  $2,200,000.00
2701 Kent Avenue                      201 Main Street                       Renewal of:  299
West Lafayette, IN  47906             Lafayette, IN  47902
35-1345024
</TABLE>

     For value received, I promise to pay to you, or your order, at your address
listed above the PRINCIPAL sum of Two Million Two Hundred Thousand and 00/100
Dollars $2,200,000.00

[ ] SINGLE ADVANCE:  I will receive all of this principal sum on
    ____________.  No additional advances are contemplated under
    this note.

[X] MULTIPLE ADVANCE:  The principal sum shown above is the
    maximum amount of principal I can borrow under this note.  On
    May 9, 1997 I will receive the amount of $______________ and
    future principal advances are contemplated.

CONDITIONS:  The conditions for future advances are ________________________

    ________________________________________________________________________

    ________________________________________________________________________

[X] OPEN END CREDIT:  You and I agree that I may borrow up to the
    maximum amount of principal more than one time.  This feature
    is subject to all other conditions and expires on March 1,
    1998.

[ ] CLOSED END CREDIT:  You and I agree that I may borrow up to
    the maximum only one time (and subject to all other conditions).

INTEREST.  I agree to pay interest on the outstanding principal balance from
May 9, 1997 at the rate of 8.75% per year until _________________.

[X] VARIABLE RATE:  This rate may then change as stated below.

[X] INDEX RATE:  The future rate will be 1/4% above the following
    index rate:  Bank One, Indiana, NA Prime Rate.

[ ] NO INDEX:  The future rate will not be subject to any internal
    or external index.  It will be entirely in your control.

[x] FREQUENCY AND TIMING:  The rate on this note may change as
    often as daily.  A change in the interest rate will take
    effect on the same day Bank One, Indiana, NA Prime Rate
    changes.


<PAGE>   2

[ ] LIMITATIONS:  During the term of this loan, the applicable
    annual interest rate will not be more than ________% or less
    than ________%.  The rate may not change more than _________%
    each ________________.

EFFECT OF VARIABLE RATE:  A change in the interest rate will have the following
effect on the payments:

[ ] The amount of each scheduled payment will change.
[ ] The amount of the final payment will change.
[ ] ___________________________________________________________________

ACCRUAL METHOD:  Interest will be calculated on a 360 day basis.

POST MATURITY RATE:  I agree to pay interest on the unpaid balance of this note
owing after maturity, and until paid in full, as stated below:

   [ ] on the same fixed or variable rate basis in effect before maturity (as
       indicated above).
   [x] at a rate equal to four (4%) above Bank One, Indiana, NA Prime Rate.

[x]  LATE CHARGE:  If a payment is made more than 15 days after it
     is due, I agree to pay a late charge of five (5%) of the
     payment amount, subject to a minimum of $25.00 and a maximum
     of $250.00.

[ ]  ADDITIONAL CHARGES:  In addition to interest, I agree to pay
     the following charges which [ ] are [ ] are not included in
     the principal amount above:  _______________________________

PAYMENTS:  I agree to pay this note as follows:

   [x] INTEREST:  I agree to pay accrued interest commencing
       June 1, 1997 and continuing on the 1st day of each
       month thereafter.

   [x] PRINCIPAL:  I agree to pay the principal March 1, 1998.

   [ ] INSTALLMENTS:  I agree to pay this note in _____
       payments.  The first payment will be in the amount of
       $______________ and will be due ______________.  A
       payment of $____________ will be due
       ____________________________ thereafter.  The final
       payment of the entire unpaid balance of principal and
       interest will be due ______________________.

   [ ] UNPAID INTEREST:  Any accrued interest not paid when due (whether due by
       reason of a schedule of payments or due because of Lender's demand) will
       become part of the principal thereafter, and will bear interest at the
       interest rate in effect from time to time as provided for in this
       agreement.

                                     -2-

<PAGE>   3

ADDITIONAL TERMS:  This loan is issued under the provisions of a Letter Loan
Agreement dated April 15, 1997.

[x]    SECURITY:  This note is separately secured by (describe separate
       document by type and date):  Security Agreement dated April 22, 1991
       (inventory and receivables) and Mortgage dated January 23, 1987.  (This
       section is for your internal use.  Failure to list a separate security
       document does not mean the agreement will not secure this note.)

PURPOSE:  The purpose of this loan is general working capital.

SIGNATURES:  I AGREE TO THE TERMS OF THIS NOTE (INCLUDING THOSE ON PAGE 2).  I
have received a copy on today's date.

Signature for Lender

Bank One, Indiana, NA                            Bioanalytical Systems, Inc.
                                                 
                                                 
                                                 
By:    /s/ TONY S. ALBRECHT                      By:  ________________________
       Tony S. Albrecht, Vice President          
                                                        


                                     -3-
<PAGE>   4

DEFINITIONS:  As used on page 1, "[x]" means the terms that apply to this loan.
"I," "me" or "my" means each Borrower who signs this note and each other person
or legal entity (including guarantors, endorsers, and sureties) who agrees to
pay this note (together referred to as "us").  "You" or "your" means the Lender
and its successors and assigns.

APPLICABLE LAW:  The law of the state of Indiana will govern this note.  Any
term of this note which is contrary to applicable law will not be effective,
unless the law permits you and me to agree to such a variation.  If any
provision of this agreement cannot be enforced according to its terms, this
fact will not affect the enforceability of the remainder of this agreement.  No
modification of this agreement may be made without your express written
consent.  Time is of the essence in this agreement.

PAYMENTS:  Each payment I make on this note will first reduce the amount I owe
you for charges which are neither interest nor principal.  The remainder of
each payment will then reduce accrued unpaid interest, and then unpaid
principal.  If you and I agree to a different application of payments, we will
describe our agreement on this note.  I may prepay a part of, or the entire
balance of this loan without penalty, unless we specify to the contrary on this
note.  Any partial prepayment will not excuse or reduce any later scheduled
payment until this note is paid in full (unless, when I make the prepayment,
you and I agree in writing to the contrary).

INTEREST:  Interest accrues on the principal remaining unpaid from time to
time, until paid in full.  If I receive the principal in more than one advance,
each advance will start to earn interest only when I receive the advance.  The
interest rate in effect on this note at any given time will apply to the entire
principal advanced at that time.  You and I may provide in this agreement for
accrued interest not paid when due to be added to principal.  Notwithstanding
anything to the contrary, I do not agree to pay and you do not intent to charge
any rate of interest that is higher than the maximum rate of interest you could
charge under applicable law for the extension of credit that is agreed to here
(either before or after maturity).  If any notice of interest accrual is sent
and is in error, we mutually agree to correct it, and if you actually collect
more interest than allowed by law and this agreement, you agree to refund it to
me.

INDEX RATE:  The index will serve only as a device for setting the rate on this
note.  You do not guarantee by selecting this index, or the margin, that the
rate on this note will be the same rate you charge on any other loans or class
of loans to me or other borrowers.

ACCRUAL METHOD:  The amount of interest that I will pay on this loan will be
calculated using the interest rate and accrual method stated on page 1 of this
note.  For the purpose of interest calculation, the accrual method will
determine the number of days in a "year."  If no accrual method is stated, then
you may use any reasonable accrual method for calculating interest.

POST MATURITY RATE:  For purposes of deciding when the "Post Maturity Rate"
(shown on page 1) applies, the term "maturity" means the date of the last
scheduled payment indicated on page 1 of this note or the date of accelerate
payment on the note, whichever is earlier.

                                     -4-

<PAGE>   5


SINGLE ADVANCE LOANS:  If this is a single advance loan, you and I expect that
you will make only one advance of principal.  However, you may add other
amounts to the principal if you make any payments described in "PAYMENTS BY
LENDER" paragraph below, or if we have agreed that accrued interest not paid
when due may be added to principal.

MULTIPLE ADVANCE LOANS:  If this is a multiple advance loan, you and I expect
that you will make more than one advance of principal.  If this is closed end
credit, repaying a part of the principal will not entitle me to additional
credit.

PAYMENTS BY LENDER:  If you are authorized to pay, on my behalf, charges I am
obligated to pay (such as property insurance premiums), then you may treat
those payments made by you as advances and add them to the unpaid principal
under this note or you may demand immediate payment of the charges.

SET-OFF:  I agree that you may set off any amount due and payable under this
note against any right I have to receive money from you.

   "Right to receive money from you " means:
   (1) any deposit account balance I have with you;
   (2) any money owed to me on an item presented to you or in your possession
       for collection or exchange; and 
   (3) any repurchase agreement or other nondeposit obligation.

   "Any amount due and payable under this note" means the total amount of which
you are entitled to demand payment under the terms of this note at the time you
set off.  This total includes any balance the due date for which you properly
accelerate under this note.

   If my right to receive money from you is also owned by someone who has not
agreed to pay this note, your right of set-off will apply to my interest in the
obligation and to any other amounts I could withdraw on my sole request or
endorsement.  You right of set-off does not apply to an account or other
obligation where my rights are only as a representative.  It also does not
apply to any Individual Retirement Account or other tax-deferred retirement
account.

   You will not be liable for the dishonor of any check when the dishonor
occurs because you set off this debt against any of my accounts.  I agree to
hold you harmless from any such claims arising as a result of your exercise of
you right of set-off.

REAL ESTATE OR RESIDENCE SECURITY:  If this note is secured by real estate or a
residence that is personal property, the existence of a default and your
remedies for such a default will be determined by applicable law, by the terms
of any separate instrument creating the security interest and, to the extent
not prohibited by law and not contrary to the terms of the separate security
instrument, by the "Default" and "Remedies" paragraphs herein.

                                     -5-

<PAGE>   6


DEFAULT:  I will be in default if any one or more of the following occur:  (1)
I fail to make a payment on time or in the amount due; (2) I fail to keep the
property insured, if required; (3) I fail to pay, or keep any promise, on any
debt or agreement I have with you; (4) any other creditor of mine attempts to
collect any debt I owe him through court proceedings; (5) I due, am declared
incompetent, make an assignment for the benefit of creditors, or become
insolvent (either because my liabilities exceed my assets or I am unable to pay
my debts as they become due); (6) I make any written statement or provide any
financial information that is untrue or inaccurate at the time if was provided;
(7) I do or fail to do something which causes you to believe that you will have
difficulty collecting the amount I owe you; (8) Any collateral securing this
note is used in a manner or for a purpose which threatens confiscation by a
legal authority:; (9) I change my name or assume an additional name without
first notifying you before making such a change; (10) I fail to plant,
cultivate and harvest crops in due season; (11) any loan proceeds are used for
a purpose that will contribute to excessive erosion of highly erodible land or
to the conversion of wetlands to produce an agricultural commodity, as further
explained in 7 C.F.R. Part 1940, Subpart G, Exhibit M.

REMEDIES:  If I am in default on this note you have, but are not limited to,
the following remedies:

   (1) You may demand immediate payment of all I owe you under this note
       (principal, accrued unpaid interest and other accrued charges).  
   (2) You may set off this debt against any right I have to the payment of 
       money from you, subject to the terms of the "Set-Off" paragraph
       herein.
   (3) You may demand security, additional security, or additional parties to
       be obligated to pay this note as a condition for not using any other
       remedy.
   (4) You may refuse to make advances to me or allow purchases on credit by
       me.
   (5) You may use any remedy you have under state or federal law.

By selecting any one or more of these remedies you do not give up your right to
later use any other remedy.  By waiving your right to declare an event to be a
default, you do not waive your right to later consider the event as a default
if it continues or happens again.

COLLECTION COSTS AND ATTORNEY'S FEES:  I agree to pay all costs of collection,
replevin or any other or similar type of cost if I am in default.  In addition,
if you hire an attorney to collect this note, I also agree to pay any fee you
incur with such attorney plus court costs (except where prohibited by law).  To
the extent permitted by the United States Bankruptcy Code, I also agree to pay
the reasonable attorney's fees and costs you incur to collect this debt as
awarded by any court exercising jurisdiction under the Bankruptcy Code.

WAIVER:  I give up my rights to require you to do certain things.  I will not
require you to:

   (1) demand payment of amounts due (presentment);
   (2) obtain official certification of nonpayment (protest); or
   (3) give notice that amounts due have not been paid (notice of dishonor).

                                     -6-

<PAGE>   7

I waive any defenses I have based on suretyship or impairment of collateral.  I
also give up any rights I may have under any valuation an appraisement laws
which apply to me.

OBLIGATIONS INDEPENDENT:  I understand that I must pay this note event if
someone else has also agree to pay it (by, for example, signing this form or a
separate guarantee or endorsement).  You may sue me alone, or anyone else who
is obligated ton this note, or any number of us together, to collect this note.
You may do so without any notice that it has not been paid (notice of
dishonor).  You may without notice release any party to this agreement without
releasing any other party.  If you give up any of your rights, with or without
notice, it will not affect my duty to pay this note.  Any extension of new
credit to any of us, or renewal of this note by all or less than all of use
will not release me from my duty to pay it.  (Of course, you are entitled to
only one payment in full.)  I agree that you may at your option extend this
note or the debt represented by this note, or any portion of the note or debt,
from time to time without limit or notice and for any term without affecting my
liability for payment of the note.   I will not assign my obligation under this
agreement without your prior written approval.

CREDIT INFORMATION:  I agree and authorize you to obtain credit information
about me from time to time (for example, by requesting a credit report) and to
report to others your credit experience with me (such as a credit reporting
agency).  I agree to provide you, upon request, any financial statement or
information you may deem necessary.  I warrant that the financial statements
and information I provide to you are or will be accurate, correct and complete.

NOTICE:  Unless otherwise required by law, any notice to me shall be given by
delivering it or by mailing it by first class mail addressed to me at my last
known address.  My current address is on page 1.  I agree to inform you in
writing of any change in my address.  I will give any notice to you by mailing
it first class to your address stated on page 1 of this agreement, or to any
other address that you have designated.

<TABLE>
<CAPTION>
                               BORROWER'S                                                           INTEREST
    DATE OF      PRINCIPAL      INITIALS      PRINCIPAL     PRINCIPAL     INTEREST     INTEREST       PAID
  TRANSACTION     ADVANCE         (not         PAYMENTS      BALANCE        RATE       PAYMENTS      THROUGH
                                required)
- --------------------------------------------------------------------------------------------------------------
    <S>         <C>             <C>          <C>           <C>            <C>        <C>            <C>
    /       /   $                            $             $                     %    $              /    /
- --------------------------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------------------------
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</TABLE>




                                     -7-

<PAGE>   1
                                                                  EXHIBIT 10.13

<TABLE>
<S>                                   <C>                                   <C>
BORROWER'S NAME AND ADDRESS           LENDER'S NAME AND ADDRESS             Loan Number: _____________________________________
"I" includes each borrower below,     "You" means the lender, its           Date:  May 9, 1997
jointly and severally.                successors and assigns.               Maturity Date:  September 30, 1997
Bioanalytical Systems, Inc.           Bank One, Indiana, NA                 Loan Amount:  $1,000,000.00
2701 Kent Avenue                      201 Main Street                       Renewal of:
West Lafayette, IN  47906             Lafayette, IN  47902
35-1345024
</TABLE>

 For value received, I promise to pay to you, or your order, at your address
listed above the PRINCIPAL sum of One Million and 00/100 Dollars $1,000,000.00

[ ]  SINGLE ADVANCE:  I will receive all of this principal sum on
     ____________.  No additional advances are contemplated under
     this note.
     
[x]  MULTIPLE ADVANCE:  The principal sum shown above is the
     maximum amount of principal I can borrow under this note.  On
     May 9, 1997 I will receive the amount of $______________ and
     future principal advances are contemplated.

     CONDITIONS:  The conditions for future advances are __________________
     ______________________________________________________________________
     ______________________________________________________________________

[ ]  OPEN END CREDIT:  You and I agree that I may borrow up to the
     maximum amount of principal more than one time.  This feature
     is subject to all other conditions and expires on
     ____________________.
     
[x]  CLOSED END CREDIT:  You and I agree that I may borrow up to
     the maximum only one time (and subject to all other conditions).

INTEREST.  I agree to pay interest on the outstanding principal balance from
May 9, 1997 at the rate of 8.75% per year.

[x] VARIABLE RATE:  This rate may then change as stated below.

[x] INDEX RATE:  The future rate will be 1/4% above the following
    index rate:  Bank One, Indiana, NA Prime Rate.

[ ] NO INDEX:  The future rate will not be subject to any
    internal or external index.  it will be entirely in your control.

[x] FREQUENCY AND TIMING:  The rate on this note may change as
    often as daily.  A change in the interest rate will take
    effect on the same day Bank One, Indiana, NA Prime Rate
    changes.

<PAGE>   2


[ ] LIMITATIONS:  During the term of this loan, the applicable
    annual interest rate will not be more than ________% or less
    than ________%.  The rate may not change more than _________%
    each ________________.

    EFFECT OF VARIABLE RATE:  A change in the interest rate will have the
    following effect on the payments:

    [ ] The amount of each scheduled payment will change.
    [ ] The amount of the final payment will change.
    [ ] ______________________________________________________________

ACCRUAL METHOD:  Interest will be calculated on a 360 day basis.

POST MATURITY RATE:  I agree to pay interest on the unpaid balance of this note
owing after maturity, and until paid in full, as stated below:

   [ ] on the same fixed or variable rate basis in effect before maturity (as
       indicated above).

   [X] at a rate equal to four (4%) above Bank One, Indiana, NA Prime Rate.

[X] LATE CHARGE:  If a payment is made more than 15 days after it
    is due, I agree to pay a late charge of five (5%) of the
    payment amount, subject to a minimum of $25.00 and a maximum
    of $250.00.
    
[ ] ADDITIONAL CHARGES:  In addition to interest, I agree to pay
    the following charges which [ ] are [ ] are not included in
    the principal amount above: ________________________________

PAYMENTS:  I agree to pay this note as follows:

   [x] INTEREST:  I agree to pay accrued interest commencing June 30, 1997 and
       continuing on the last day of each month thereafter.

   [x] PRINCIPAL:  I agree to pay the principal September 30, 1997.

   [ ] INSTALLMENTS:  I agree to pay this note in _____ payments.  The first
       payment will be in the amount of $______________ and will be due
       ______________.  A payment of $____________ will be due
       ____________________________ thereafter.  The final payment of the
       entire unpaid balance of principal and interest will be due
       ______________________.

   [ ] UNPAID INTEREST:  Any accrued interest not paid when due (whether due by
       reason of a schedule of payments or due because of Lender's demand) will
       become part of the principal thereafter, and will bear interest at the
       interest rate in effect from time to time as provided for in this
       agreement.

ADDITIONAL TERMS:  This loan is issued under the provisions of a Letter Loan
Agreement dated April 15, 1997.

                                     -2-

<PAGE>   3


SECURED:  Mortgage dated January 23, 1987 (1205 Kent Avenue) and Mortgage
dated  July 19, 1996 (2701 & 2801 Kent Avenue).

   Security Agreement dated April 22, 1991 (receivables & inventory) and
Security Agreement dated August 22, 1996 (mass-spectrometer) Additionally,
secured by equipment to be purchased.

   [ ] SECURITY:  This note is separately secured by (describe separate
       document by type and date):

       See Above.

       (This section is for your internal use.  Failure to list a separate
       security document does not mean the agreement will not secure this
       note.)

PURPOSE:  The purpose of this loan is support capital expenditures.

SIGNATURES:  I AGREE TO THE TERMS OF THIS NOTE (INCLUDING THOSE ON PAGE 2).  I
have received a copy on today's date.


Signature for Lender

Bank One, Indiana, NA                            Bioanalytical Systems, Inc.
                                                 
                                                 
By: /s/  Tony S. Albrecht                         By:
    ------------------------------------             ---------------------------
    Tony S. Albrecht, Vice President
                                                      








                                     -3-
<PAGE>   4

DEFINITIONS:  As Used on page 1, "[x]" means the terms that apply to this loan.
"I," "me" or "my" means each Borrower who signs this note and each other person
or legal entity (including guarantors, endorsers, and sureties) who agrees to
pay this note (together referred to as "us").  "You" or "your" means the Lender
and its successors and assigns.

APPLICABLE LAW:  The law of the state of Indiana will govern this note.  Any
term of this note which is contrary to applicable law will not be effective,
unless the law permits you and me to agree to such a variation.  If any
provision of this agreement cannot be enforced according to its terms, this
fact will not affect the enforceability of the remainder of this agreement.  No
modification of this agreement may be made without your express written
consent.  Time is of the essence in this agreement.

PAYMENTS:  Each payment I make on this note will first reduce the amount I owe
you for charges which are neither interest nor principal.  The remainder of
each payment will then reduce accrued unpaid interest, and then unpaid
principal.  If you and I agree to a different application of payments, we will
describe our agreement on this note.  I may prepay a part of, or the entire
balance of this loan without penalty, unless we specify to the contrary on this
note.  Any partial prepayment will not excuse or reduce any later scheduled
payment until this note is paid in full (unless, when I make the prepayment,
you and I agree in writing to the contrary).

INTEREST:  Interest accrues on the principal remaining unpaid from time to
time, until paid in full.  If I receive the principal in more than one advance,
each advance will start to earn interest only when I receive the advance.  The
interest rate in effect on this note at any given time will apply to the entire
principal advanced at that time.  You and I may provide in this agreement for
accrued interest not paid when due to be added to principal.  Notwithstanding
anything to the contrary, I do not agree to pay and you do not intent to charge
any rate of interest that is higher than the maximum rate of interest you could
charge under applicable law for the extension of credit that is agreed to here
(either before or after maturity).  If any notice of interest accrual is sent
and is in error, we mutually agree to correct it, and if you actually collect
more interest than allowed by law and this agreement, you agree to refund it to
me.

INDEX RATE:  The index will serve only as a device for setting the rate on this
note.  You do not guarantee by selecting this index, or the margin, that the
rate on this note will be the same rate you charge on any other loans or class
of loans to me or other borrowers.

ACCRUAL METHOD:  The amount of interest that I will pay on this loan will be
calculated using the interest rate and accrual method stated on page 1 of this
note.  For the purpose of interest calculation, the accrual method will
determine the number of days in a "year."  If no accrual method is stated, then
you may use any reasonable accrual method for calculating interest.

POST MATURITY RATE:  For purposes of deciding when the "Post Maturity Rate"
(shown on page 1) applies, the term "maturity" means the date of the last
scheduled payment indicated on page 1 of this note or the date of accelerate
payment on the note, whichever is earlier.

                                     -4-

<PAGE>   5


SINGLE ADVANCE LOANS:  If this is a single advance loan, you and I expect that
you will make only one advance of principal.  However, you may add other
amounts to the principal if you make any payments described in "PAYMENTS BY
LENDER" paragraph below, or if we have agreed that accrued interest not paid
when due may be added to principal.

MULTIPLE ADVANCE LOANS:  If this is a multiple advance loan, you and I expect
that you will make more than one advance of principal.  If this is closed end
credit, repaying a part of the principal will not entitle me to additional
credit.

PAYMENTS BY LENDER:  If you are authorized to pay, on my behalf, charges I am
obligated to pay (such as property insurance premiums), then you may treat
those payments made by you as advances and add them to the unpaid principal
under this note or you may demand immediate payment of the charges.

SET-OFF:  I agree that you may set off any amount due and payable under this
note against any right I have to receive money from you.

   "Right to receive money from you " means:
   (1) any deposit account balance I have with you;
   (2) any money owed to me on an item presented to you or in your possession
       for collection or exchange; and 
   (3) any repurchase agreement or other nondeposit obligation.

   "Any amount due and payable under this note" means the total amount of which
you are entitled to demand payment under the terms of this note at the time you
set off.  This total includes any balance the due date for which you properly
accelerate under this note.

   If my right to receive money from you is also owned by someone who has not
agreed to pay this note, your right of set-off will apply to my interest in the
obligation and to any other amounts I could withdraw on my sole request or
endorsement.  You right of set-off does not apply to an account or other
obligation where my rights are only as a representative.  It also does not
apply to any Individual Retirement Account or other tax-deferred retirement
account.

   You will not be liable for the dishonor of any check when the dishonor
occurs because you set off this debt against any of my accounts.  I agree to
hold you harmless from any such claims arising as a result of your exercise of
you right of set-off.

REAL ESTATE OR RESIDENCE SECURITY:  If this note is secured by real estate or a
residence that is personal property, the existence of a default and your
remedies for such a default will be determined by applicable law, by the terms
of any separate instrument creating the security interest and, to the extent
not prohibited by law and not contrary to the terms of the separate security
instrument, by the "Default" and "Remedies" paragraphs herein.


                                     -5-

<PAGE>   6


DEFAULT:  I will be in default if any one or more of the following occur:  (1)
I fail to make a payment on time or in the amount due; (2) I fail to keep the
property insured, if required; (3) I fail to pay, or keep any promise, on any
debt or agreement I have with you; (4) any other creditor of mine attempts to
collect any debt I owe him through court proceedings; (5) I due, am declared
incompetent, make an assignment for the benefit of creditors, or become
insolvent (either because my liabilities exceed my assets or I am unable to pay
my debts as they become due); (6) I make any written statement or provide any
financial information that is untrue or inaccurate at the time if was provided;
(7) I do or fail to do something which causes you to believe that you will have
difficulty collecting the amount I owe you; (8) Any collateral securing this
note is used in a manner or for a purpose which threatens confiscation by a
legal authority:; (9) I change my name or assume an additional name without
first notifying you before making such a change; (10) I fail to plant,
cultivate and harvest crops in due season; (11) any loan proceeds are used for
a purpose that will contribute to excessive erosion of highly erodible land or
to the conversion of wetlands to produce an agricultural commodity, as further
explained in 7 C.F.R. Part 1940, Subpart G, Exhibit M.

REMEDIES:  If I am in default on this note you have, but are not limited to,
the following remedies:

   (1) You may demand immediate payment of all I owe you under this note
       (principal, accrued unpaid interest and other accrued charges).  
   (2) You may set off this debt against any right I have tot he payment of 
       money from you, subject to the terms of the "Set-Off" paragraph
       herein.
   (3) You may demand security, additional security, or additional parties to
       be obligated to pay this note as a condition for not using any other
       remedy.
   (4) You may refuse to make advances to me or allow purchases on credit by
       me.
   (5) You may use any remedy you have under state or federal law.

By selecting any one or more of these remedies you do not give up your right to
later use any other remedy.  By waiving your right to declare an event to be a
default, you do not waive your right to later consider the event as a default
if it continues or happens again.

COLLECTION COSTS AND ATTORNEY'S FEES:  I agree to pay all costs of collection,
replevin or any other or similar type of cost if I am in default.  In addition,
if you hire an attorney to collect this note, I also agree to pay any fee you
incur with such attorney plus court costs (except where prohibited by law).  To
the extent permitted by the United States Bankruptcy Code, I also agree to pay
the reasonable attorney's fees and costs you incur to collect this debt as
awarded by any court exercising jurisdiction under the Bankruptcy Code.

WAIVER:  I give up my rights to require you to do certain things.  I will not
require you to:

   (1) demand payment of amounts due (presentment);
   (2) obtain official certification of nonpayment (protest); or
   (3) give notice that amounts due have not been paid (notice of dishonor).


                                     -6-

<PAGE>   7


I waive any defenses I have based on suretyship or impairment of collateral.  I
also give up any rights I may have under any valuation an appraisement laws
which apply to me.

OBLIGATIONS INDEPENDENT:  I understand that I must pay this note event if
someone else has also agree to pay it (by, for example, signing this form or a
separate guarantee or endorsement).  You may sue me alone, or anyone else who
is obligated ton this note, or any number of us together, to collect this note.
You may do so without any notice that it has not been paid (notice of
dishonor).  You may without notice release any party to this agreement without
releasing any other party.  If you give up any of your rights, with or without
notice, it will not affect my duty to pay this note.  Any extension of new
credit to any of us, or renewal of this note by all or less than all of use
will not release me from my duty to pay it.  (Of course, you are entitled to
only one payment in full.)  I agree that you may at your option extend this
note or the debt represented by this note, or any portion of the note or debt,
from time to time without limit or notice and for any term without affecting my
liability for payment of the note.   I will not assign my obligation under this
agreement without your prior written approval.

CREDIT INFORMATION:  I agree and authorize you to obtain credit information
about me from time to time (for example, by requesting a credit report) and to
report to others your credit experience with me (such as a credit reporting
agency).  I agree to provide you, upon request, any financial statement or
information you may deem necessary.  I warrant that the financial statements
and information I provide to you are or will be accurate, correct and complete.

NOTICE:  Unless otherwise required by law, any notice to me shall be given by
delivering it or by mailing it by first class mail addressed to me at my last
known address.  My current address is on page 1.  I agree to inform you in
writing of any change in my address.  I will give any notice to you by mailing
it first class to your address stated on page 1 of this agreement, or to any
other address that you have designated.

<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------------------
                               BORROWER'S                                                                   
                                INITIALS                                                            INTEREST
    DATE OF      PRINCIPAL        (not        PRINCIPAL     PRINCIPAL     INTEREST     INTEREST       PAID  
  TRANSACTION     ADVANCE       required)      PAYMENTS      BALANCE        RATE       PAYMENTS      THROUGH
- -------------------------------------------------------------------------------------------------------------
   <S>          <C>           <C>           <C>           <C>         <C>            <C>          <C>
- -------------------------------------------------------------------------------------------------------------
   /   /         $                            $             $                      %  $            /    /
- -------------------------------------------------------------------------------------------------------------
   /   /         $                            $             $                      %  $            /     /
- -------------------------------------------------------------------------------------------------------------
   /   /         $                            $             $                      %  $            /     /
- -------------------------------------------------------------------------------------------------------------
   /   /         $                            $             $                      %  $            /     /
- -------------------------------------------------------------------------------------------------------------
   /   /         $                            $             $                      %  $            /     /
- -------------------------------------------------------------------------------------------------------------
   /   /         $                            $             $                      %  $            /     /
- -------------------------------------------------------------------------------------------------------------
   /   /         $                            $             $                      %  $            /     /
- -------------------------------------------------------------------------------------------------------------
   /   /         $                            $             $                      %  $            /     /
- -------------------------------------------------------------------------------------------------------------
   /   /         $                            $             $                      %  $            /     /
- -------------------------------------------------------------------------------------------------------------
   /   /         $                            $             $                      %  $            /     /
- -------------------------------------------------------------------------------------------------------------
</TABLE>


                                     -7-

<PAGE>   1
                                                                  EXHIBIT 10.14
                             INDEMNIFYING MORTGAGE

 THIS INDENTURE WITNESSETH, That Bioanalytical Systems, Inc. of Tippecanoe
County, in the State of Indiana, hereby mortgage and warrant to BANK ONE,
LAFAYETTE, NA, Lafayette, Tippecanoe County, Indiana, the following described
property in the County of Tippecanoe and State of Indiana , to  wit:

  A part of Lot #3 in McClure Park Subdivision, Part One (1) as platted  upon a
  part of the Northeast quarter of Section twelve (12), Township twenty-three
  (23) North, Range five (5) West, described as follows, to wit:

  Beginning at a point which is Due South 1911.64 feet and Due West 229.00 feet
  of the northeast corner of the northeast quarter of the aforesaid Section 12;
  thence Due South 1600.00 feet; thence Due West 214.26 feet; thence North
  00#-02'-30" West 200.26 feet; thence in a Southeasterly direction on and
  along the arc of a curve whose radius is 460.33 feet a distance of 199.01
  feet; thence Due East 21.00 feet to the place of beginning, containing 0.86
  acres, more or less.

  Located in the City of West Lafayette, Wabash Township, Tippecanoe County,
  Indiana.

 This mortgage is given to the mortgagee for the purpose of securing all
indebtedness already owing by Bioanalytical Systems, Inc., mortgagor, to said
BANK ONE, LAFAYETTE, NA, in the sum of $500,000.00 and is also given to secure
all indebtedness or liability, of every kind, character and description of the
mortgagor, or either of them, to the mortgagee hereafter created, such as
future loans, advances, overdrafts, and all indebtedness that may accrue to
said Bank by reason of the mortgagor, or either of them, becoming surety or
indorser for any other person, whether said indebtedness was originally payable
to said Bank or has come to it by assignment or otherwise, and shall be binding
upon the mortgagor and remain in full force and effect until all of said
indebtedness is paid.  This mortgage shall secure the full amount of said
indebtedness without regard to the time when same was made.

 The mortgagor expressly agrees to pay all sums and indebtedness secured
hereby, and the same shall be collectable without relief from valuation and
appraisement laws and with attorney's fees, and in case it should become
necessary to appoint a Receiver for any property that may be secured by this
mortgage, it shall not be necessary to serve notice upon the mortgagor.

 IN WITNESS WHEREOF, Bioanalytical Systems, Inc. have hereunto set their hands
and seals this 23rd day of January, 1987.  

 Bioanalytical Systems, Inc.

By:\S\PETER T. KISSINGER
   ---------------------------               --------------------------

   ---------------------------

<PAGE>   2


STATE OF INDIANA, COUNTY OF Tippecanoe SS:

  Before the undersigned, a Notary Public in and for said County and State, this
23RD day of January _____, 1987 personally appeared Bioanalytical Systems,
Inc., and  acknowledged the execution of the above and foregoing mortgage for
the uses and purposes therein set forth.

 WITNESS my hand and Notarial Seal.

                        \S\LINA L. REEVES-KERNER
                        -------------------------
                        NOTARY PUBLIC

This instrument prepared by:  Murray N. Marshall

                                     -2-


<PAGE>   1
                                                                  EXHIBIT 10.15

                              REAL ESTATE MORTGAGE


 THIS INDENTURE WITNESSETH: That Bioanalytical Systems, Inc., (hereinafter
referred to as "Mortgagor") of Tippecanoe County, State of Indiana MORTGAGE AND
WARRANT to BANK ONE, LAFAYETTE, NA, a national banking association with its
main banking office at 201 Main Street, Lafayette, IN 47901 (hereinafter
referred to as "Bank"), the following described real estate (hereinafter
referred to as "Mortgaged Premises") in Tippecanoe County, State of Indiana:

 Lot numbered Two (2) in the Replat of Part of Lot 1 McClure Park Subdivision,
 Part Two, as per plat thereof dated March 30, 1983 and recorded April 18, 1983
 in Plat Cabinet C, Slide C-59, in the Office of Recorder, Tippecanoe County,
 Indiana.  Located in the City of West Lafayette, Wabash Township, Tippecanoe
 County, Indiana.

 Lot 1 in Replat of Part of Lot 1 McClure Park Subdivision, Part Two per the
 plat thereof dated March 30, 1983, recorded April 18, 1983, Plat Cabinet C,
 Slide C-59, Document #8302918 in the Office of the Recorder of Tippecanoe
 County, Indiana.  Located in the City of West Lafayette, Wabash Township,
 Tippecanoe County, Indiana.

together with all rights, privileges, interest easements, hereditaments,
appurtenances, fixtures and improvements now or hereafter belonging,
appertaining, attached to, or used in connection with, the Mortgaged Premises,
and the rents, issues, income and profits thereof.

 This Mortgage is given to secure the performance of the provisions and the
payment of:

  A.  That certain promissory note from Bioanalytical Systems, Inc. to Bank
      dated July 19, 1996 in the principal sum of Four Million Seven Hundred
      Twenty Thousand and no/l00 ($4,720,000.00) with interest as therein
      stated and with a final maturity date of January 19, 1998, together with
      any future modifications, extensions, and renewals thereof, and any and
      all notes or other instrument(s) given in substitution therefore and/or
      replacement thereof (such note(s) or other instruments all included in
      the term "note"); and

  B.  Any other indebtedness now or hereafter owing Bank by the Mortgagor when
      evidenced by a promissory note(s), guaranty, hypothocation(s), or any
      other instrument(s) reciting that they are secured by this Mortgage.

 In all cases the debt secured hereby includes advancements to protect the
security, costs of collection and reasonable attorney's fees.  This Mortgage
shall secure payment of the note(s) whether the entire amount shall have been
advanced to the Mortgagor at the date hereof or at a later date, or having been
advanced, shall have been repaid in part and further advances made at a later
date.  The note(s) and this Mortgage, including the terms of repayment thereof,
may from time to time be modified or amended in writing to include any future
advance or advances whether or not related to 


<PAGE>   2

the original advances together with the specified interest thereon.   It is
agreed that this Mortgage shall secure the unpaid balance of loans or advances
made by Bank not to exceed $4,720,000.00  in the aggregate and exclusive of
interest, advances to protect the security, costs of collection and reasonable
attorney's fees.  If the unpaid balance at any time exceeds such amount, then
this Mortgage shall secure that portion of the outstanding balance which does
not exceed such amount.
        
 The Mortgagor, jointly and severally if more than one, covenant and agree with
the Bank that:

 1.  Mortgagor will pay when due all indebtedness secured hereby, on the dates
and in the amounts, respectively, as provided in any note or other evidence of
indebtedness secured by this Mortgage and in this Mortgage, with attorneys'
fees, and without relief from valuation or appraisements laws.


 2.  Mortgagor will not permit any lien of mechanics or materialmen to attach
to the Mortgaged Premises.


 3.  Mortgagor will keep the Mortgaged Premises in good repair, and will not
commit or permit waste thereon, and will pay when due all taxes and assessments
levied or assessed against the Mortgaged Premises or any part thereof.  The
Bank may enter upon and inspect the Mortgaged Premises at any reasonable time.


 4.  Mortgagor will procure and maintain in effect at all times adequate
insurance from reliable insurance companies acceptable to the Bank against loss
or destruction of the Mortgaged Premises on account of fire, windstorm and such
other hazards and in such amounts as the Bank may require from time to time,
and all such policies of insurance shall contain proper clauses making all sums
recoverable upon such policies payable to the Bank and to the Mortgagor as
their respective interests may appear; all such policies of insurance and all
abstracts of title or title insurance policies with respect to the Mortgaged
Premises shall be delivered to and retained by the Bank until the indebtedness
secured hereby is fully paid.


 5.  Bank may, at its option, advance and pay all sums necessary to protect and
preserve the security intended to be given by this Mortgage; and all sums so
advanced and paid by Bank shall become a part of the indebtedness secured
hereby and shall bear interest from date of payment at the same rate or rates
as the principal indebtedness evidenced by any note or other evidence of
indebtedness; and such sums may include, but not by way of limitation, (i)
insurance premiums, taxes and assessments, and liens which maybe or become
prior and senior to this Mortgage as a lien on the Mortgaged Premises, or any
part thereof, (ii) the cost of any title insurance, surveys, or other evidence
which in the discretion of Bank may be required to establish and preserve the
lien of this Mortgage; (iii) all costs, expenses and attorneys' fees incurred
by Bank in respect of any and all legal or equitable actions which relate to
this Mortgage or to the Mortgaged Premises, during the existence of the
indebtedness secured by this Mortgage; and (iv) the cost of any repairs deemed
necessary and advisable by Bank to be made to the Mortgaged Premises.

                                     -2-

<PAGE>   3


 6.  Bank shall be subrogated to the rights of the holder of each lien or claim
paid with monies secured hereby; and Bank at its option, an on such terms as it
may desire, may extend the time of payment of any part or all of the
indebtedness secured hereby without in any way impairing the lien of its
Mortgage or releasing Mortgagor or any of them from liability under this
Mortgage or under any note or other evidence of indebtedness.


 7.  If any default shall occur in the payment of any of the indebtedness
secured hereby, or in the performance of any covenant or agreement or Mortgagor
in the loan commitment(s), loan agreement(s) or hereunder, or if Mortgagor
shall abandon the Mortgaged Premises, or shall be adjudged bankrupt, or if a
trustee or receiver shall be appointed for Mortgagor or for any part of the
Mortgaged Premises, then and in any such event all indebtedness secured hereby
shall, at the option of Bank, become immediately due and payable without notice
to mortgagor, and this Mortgage may be foreclosed accordingly.  The waiver by
Bank of any default of Mortgagor shall not operated as a waiver of other
defaults.  Notice by Bank of its intention to exercise any right or option
hereunder is hereby expressly waived by Mortgagor, and any one or more of
Bank's rights or remedies hereunder may be enforced successively or
concurrently.  Any delay in enforcing any such right or remedy shall not
prevent its later enforcement while Mortgagor shall be in default hereunder.
In the event of the foreclosure of this Mortgage, all abstracts of title and
all title insurance policies for the Mortgaged Premises shall become the
absolute property of Bank.

 8.  Unless otherwise agreed in writing, the Bank shall be entitled to all
compensation, awards, damages, claims, rights of action and proceeds of, or on
account of, any damage or taking through condemnation or eminent domain
regarding the Mortgaged Premises, with any excess over all sums due hereunder
paid to Mortgagor.


 9.  Mortgagor shall not sell, convey, transfer, lease or further encumber any
interest in or any part of the Mortgaged Premises, nor shall a voluntary sale,
pledge or other transfer of the beneficial interest in Mortgagor be effected
without the prior written consent of the Bank having been obtained to the
purchase, transfer, lease or pledge, to the purchaser, transferee, lessee or
pledgee and to the form and substance of any instrument evidencing any such
purchase, transfer, lease or pledge.  Any such sale, conveyance, transfer,
pledge, lease or encumbrance made without the Bank's prior written consent
shall be void.


 10.  Upon default hereunder, the Bank, to the extent permitted by law and
without regard to the value or occupancy of the Mortgaged Premises, shall be
entitled as a matter of right if it so elects to the appointment of a receiver
to enter upon and take possession of the Mortgaged Premises and to collect all
rents, revenues, issues, income, and profits thereof and apply the same as the
court may direct.


 11.  Mortgagor has not actual or constructive knowledge of the existence,
release, or threatened release at the Mortgaged Premises of any substance
deemed toxic or hazardous under any applicable federal, state, or local laws.
And that the Mortgagor will not allow or cause the release or threatened
release of hazardous or toxic substances or waste on the Mortgaged Premises and

                                     -3-

<PAGE>   4

agrees to indemnify and hold the Bank harmless from all costs and damage caused
by Mortgagor, or those claiming by and through Mortgagor, releasing or dumping
any such hazardous waste.  Bank may, at its option, advance all sums necessary
to protect and preserve the security, which sums shall become a part of the
indebtedness, including the cost of any necessary environmental inspection
performed on the Mortgaged Premises; the cost of cleaning up any release or
threatened release of hazardous or toxic material or waste at the Mortgaged
premises.  And Mortgagor is, and shall remain, in compliance with all
environmental laws and shall not use, store, or dispose of hazardous
substances, other than has been disclosed in writing to the Bank at the time
the loan is made.  And Mortgagor shall immediately inform the Bank of any
notices, complaints, governmental investigations, fines or penalties imposed
for noncompliance in regard to environmental statutes.


 12.  No rights, power or remedy conferred upon or reserved to the Bank by any
note, this Mortgage or any other instrument is exclusive of any other right,
power, or remedy but each and every such right, power, and remedy shall be
cumulative and concurrent and shall be in addition to any other right, power,
and remedy given hereunder or under a note or any other instrument securing the
note, or now or hereafter existing at law, in equity or by statute.


 13.  If any term or provision of the note or this Mortgage shall be deemed
invalid, illegal or unenforceable in any respect, the validity of the remaining
terms or provisions shall not be affected or prejudiced; and if the application
of any term or provision of the note or this Mortgage shall be deemed invalid,
illegal or unenforceable, the application of the remaining terms or provisions
shall not be affected or prejudiced unenforceable, the application of the
remaining terms or provisions shall not be affected or prejudiced.


 14.  All rights and obligations of Mortgagor hereunder shall extend to and be
binding upon the several heirs, representatives, successors and assigns of
Mortgagor, and shall inure to the benefit of Bank, its successors and assigns.
In the event this Mortgage is executed by more than one person, corporation, or
other entity, the work "Mortgagor" as used herein shall be construed to mean
and include each of them, and the terms and provisions of this Mortgage
construed accordingly.


 15.  This Mortgage is ___ x ___ is not _____ a "purchaser money mortgage".

 IN WITNESS WHEREOF, the Mortgagor has executed this instrument on this 19th
day of July, 1996.

                        BIOANALYTICAL SYSTEMS, INC.



                         By:   \S\LINA L. REEVES-KERNER
                               --------------------------------
                               Lina L. Reeves-Kerner
                               Vice President

                                     -4-

<PAGE>   5


STATE OF INDIANA                     )
                               SS:   )               (Individual Acknowledgment)
COUNTY OF TIPPECANOE                 )


        Before me, a Notary Public in and for said County and State, personally
appeared _______________________________________________________ who
acknowledged the execution of the above and foregoing Real Estate Mortgage
this _____ day of ________________, 19___.

My Commission Expires:                         Signature:
                                                         -----------------------

- ----------------------                         Printed:
                                                         -----------------------
                                                         Notary Public
County of Residence:

- ----------------------



STATE OF INDIANA                     )
                               SS:   )               (Individual Acknowledgment)
COUNTY OF TIPPECANOE                 )


         Before me, a Notary Public in and for said County and State,
personally appeared Lina L. Reeves-Kerner, the Vice President, respectively of
Bioanalytical Systems, Inc. who acknowledged the execution of the above and
foregoing Real Estate Mortgage for and on behalf of said corporation this 19th
day of July, 1996.

My Commission Expires:                         Signature: \S\BECKY MAURER
                                                          ------------------
                                               Printed:
- ----------------------                                    ------------------
                                                          Notary Public

County of Residence:


- ----------------------

This instrument prepared by: Murray N. Marshall             
                             ------------------




                                     -5-

<PAGE>   1
                                                                EXHIBIT 10.16


<TABLE>
<S>                                     <C>
Bioanalytical Systems, Inc.                     Bank One, Lafayette, NA
2701 Kent Ave.                                  201 Main Street
West Lafayette, IN 47906                        Lafayette, IN 47901


DEBTOR'S NAME, ADDRESS AND SOC. SEC. OR TAXPAYER I.D. NO.        SECURED PARTY'S NAME AND ADDRESS
    ("I" means each Debtor who Signs)                           ("You" means Secured Party its successors and assigns)
</TABLE>

<TABLE>
<S><C>
I am entering into this security agreement with you on April 22, 1991.
SECURITY INTEREST AND COLLATERAL. To secure (check one):

[x]  the payment and performance of each and every debt, liability and 
     obligation of every type and description, except in those cases listed in
     the "SECURED OBLIGATIONS" paragraph on the reverse side, which
     Bioanalytical Systems, Inc. may now or at any time hereafter owe to you
     (whether such debt, liability or obligation now exists or is hereafter
     created or incurred, and whether it is or may be direct or indirect, due or
     to become due, absolute or contingent, primary or secondary, liquidated    
     or unliquidated, or joint, several or joint and several);
        
[ ]  the debt, liability or obligation of ____________________________________
     ____________________ to you evidenced by the following:
     ___________________________________________________ and any extensions,
     renewals, refinancing, modifications or replacements thereof; 
I give you a security interest in the property indicated below, whether l 
own it now or may own it in the future, together with all parts, accessories, 
repairs, improvements and accessions to the property, wherever it is located, 
and all proceeds and products from the property.
        

     [x]     INVENTORY:           All inventory which I hold for ultimate
                                  sale or lease, or which has been or will
                                  be supplied under contracts of service,
                                  or which are raw materials, work in
                                  process, or materials used or consumed in
                                  my business.

     [ ]     EQUIPMENT:           All equipment including, but not limited
                                  to, all machinery, vehicles, furniture,
                                  fixtures, manufacturing equipment, farm
                                  machinery and equipment, shop equipment,
                                  office and record keeping equipment, and
                                  parts and tools.  Any equipment described
                                  in a list or schedule which l give to you
                                  will also be included in the secured
                                  property. but such a list is not
                                  necessary for a valid security interest
                                  in my equipment.

     [ ]     FARM PRODUCTS:       All farm products including, but not
                                  limited to:

                                  (a)  all poultry and livestock and their
                                       young, along with their products and
                                       produce; 
                                  (b)  all crops, annual or perennial, and all 
                                       products of the crops; and 
                                  (c)  all feed, seed, fertilizer,
                                       medicines, and other supplies used or
                                       produced in my farming operations.

     [x]     ACCOUNTS, INSTRUMENTS, DOCUMENTS, CHATTEL PAPER AND OTHER
             RIGHTS TO PAYMENT:
                                  All rights l have now or may have in the
                                  future to the payment of money including,
                                  but not limited to: 
                                  (a)  payment for goods sold or leased
                                       or for services rendered, whether or
                                       not l have earned such payment by
                                       performance; and 
                                  (b)  rights to payment arising out
                                       of all present and future debt
                                       instruments, chattel paper and loans and
                                       obligations receivable.  
</TABLE>
                                     -3-

<PAGE>   2

                                       The above include any rights and
                                       interests (including all liens and
                                       security interests) which l may have by
                                       law or agreement against any account
                                       debtor or obligor of mine.
        
     [ ]     GENERAL INTANGIBLES:      All general intangibles including, but
                                       not limited to, tax refunds, applications
                                       for patents, patents, copyrights,
                                       trademarks, trade secrets, good will,
                                       trade names, customer lists, permits and
                                       franchises, and the right to use my name.
     [ ]
<TABLE>
         <S>                                                               <C>
     
                 If this agreement covers timber to be cut,                  County: ___________________________________________
                 minerals (including oil and County gas), fixtures                                                                 
                 or crops growing or to be grown, the legal                  Crop Year__________________________________________   
                 description is:                                                                                                   
                 _________________________________________________           I am a(n)   [ ] Individual   [ ] partnership          
                 _________________________________________________                       [x] corporation                           
                 _________________________________________________                       [ ]____________________________________   
                 _________________________________________________                                                                 
                 _________________________________________________
                                                                                                                  
                 [ ] If checked, file this agreement in the real                                                                   
                 estate records.                                                                                                   
                 Record Owner (if not me): _______________________           The property will be used for  [ ] personal
                 _________________________________________________                      
                 _________________________________________________                      [x] business [ ] agricultural 
                                                                                        
                                                                                         [ ] ____________________ reasons          
                                                                                                                                   
                                                                             I AGREE TO THE TERMS SET OUT ON THE FRONT AND BACK    
                                                                             OF THIS AGREEMENT.  I have received a copy of this    
                                                                             document on today's date.                             
                                                                                                                                   
                                                                                         Bioanalytical Systems, Inc.               
                                                                              --------------------------------------------------   
                                                                                              Debtor's Name                        
                                                                                                                                   
                                                                                                                                   
                                                                             By:\S\PETER T. KISSINGER                              
                               Bank One, Lafayette, NA                         -------------------------------------------------   
                               ---------------------------------             Title: President                                      
                                Secured Party's Name                                --------------------------------------------   
                                                                                                                                   
                                                                                                                                   
                 By:\S\MURRAY N. MARSHALL                                                                                          
                 -----------------------------------------------             By:                                                   
                                                                                  ----------------------------------------------   
                 Title: Vice President                                                                                             
                 -----------------------------------------------             Title:                                                
                                                                                  ----------------------------------------------   
</TABLE>

(C) 1986 BANKERS SYSTEMS, INC., ST. CLOUD, MN 56301 SECURITY AGREEMENT FORM SA
    11/12/96





                                     -4-

<PAGE>   1
                                                                  EXHIBIT 10.17

<TABLE>
<S>                                                         <C>
Bioanalytical Systems, Inc.                                 Bank One, Lafayette, NA
2701 Kent Avenue                                            201 Main Street
West Lafayette, IN  47906                                   Lafayette, IN  47901

35-1345024
DEBTOR'S NAME, ADDRESS AND SSN OR TIN                       SECURED PARTY'S NAME AND ADDRESS
    ("I" means each Debtor who signs.)                      ("You" means the Secured Party, its successors and assigns.)
</TABLE>

I am entering into this security agreement with you on August 22, 1996 (date).

SECURED DEBTS.  I agree that this security agreement will secure the payment
and performance of the debts, liabilities or obligations described below that
(Check one) [ ] I [x] (name) Bioanalytical Systems, Inc. owe(s) to you now or
in the future: (Check one below):

    [ ]  SPECIFIC DEBT(S).  The debt(s), liability or obligations evidenced by
         (describe): __________________________________________________________
         and all extensions, renewals, refinancings, modifications and
         replacements of the debt, liability or obligation.

    [x]  ALL DEBT(S).  Except in those cases listed in the "LIMITATIONS"
         paragraph on page 2, each and every debt, liability and obligation of
         every type and description (whether such debt, liability or obligation
         now exists or is incurred or created in the future and whether it is
         or may be direct or indirect, due or to become due, absolute or
         contingent, primary or secondary, liquidated or unliquidated, or
         joint, several or joint and several).

SECURITY INTEREST.  To secure the payment and performance of the above
    described Secured Debts, liabilities and obligations, I give you a security
    interest in all of the property described below that I now own and that I
    may own in the future (including, but not limited to, all parts,
    accessories, repairs, improvements, and accessions to the property),
    wherever the property is or may be located, and all proceeds and products
    from the property.

    [ ]  INVENTORY:  All inventory which I hold for ultimate sale or lease, or
         which has been or will be supplied under contracts of service, or
         which are raw materials, work in process, or materials used or
         consumed in my business.

    [ ]  EQUIPMENT:  All equipment including, but not limited to, all
         machinery, vehicles, furniture, fixtures, manufacturing equipment,
         farm machinery and equipment, shop equipment, office and recordkeeping
         equipment, and parts and tools.  All equipment described in a list or
         schedule which I give to you will also be included in the secured
         property, but such a list is not necessary for a valid security
         interest in my equipment.
<PAGE>   2

    [ ]  FARM PRODUCTS:  All farm products including, but not limited to:
         (a) all poultry and livestock and their young, along with their
         products, produce and replacements; 
         (b) all crops, annual or perennial, and all products of the crops; and
         (c) all feed, seed, fertilizer, medicines, and other supplies used or
         produced in my farming operations.

    [ ]  ACCOUNTS, INSTRUMENTS, DOCUMENTS, CHATTEL PAPER AND OTHER RIGHTS TO
         PAYMENT:  All rights I have now and that I may have in the future to
         the payment of money including, but not limited to:
         (a) payment for goods and other property sold or leased or for
             services rendered, whether or not I have earned such payment by
             performance; and
         (b) rights to payment arising out of all present and future debt
             instruments, chattel paper and loans and obligations receivable. 
         The above include any rights and interests (including all liens and
         security interests) which I may have by law or agreement against any
         account debtor or obligor of mine.

    [ ]  GENERAL INTANGIBLES:  All general intangibles including, but not
         limited to, tax refunds, applications for patents, patents,
         copyrights, trademarks, trade secrets, good will, trade names,
         customer lists, permits and franchises, and the right to use my name.

    [ ]  GOVERNMENT PAYMENTS AND PROGRAMS:  All payments, accounts, general
         intangibles, or other benefits (including, but not limited to,
         payments in kind, deficiency payments, letters of entitlement,
         warehouse receipts, storage payments, emergency assistance payments,
         diversion payments, and conservation reserve payments) in which I now
         have and in the future may have any rights or interest and which arise
         under or as a result of any preexisting, current or future Federal or
         state governmental program (including, but not limited to, all
         programs administered by the Commodity Credit Corporation and the
         ASCS).

    [x]  THE SECURED PROPERTY INCLUDES, BUT IS NOT LIMITED BY, THE FOLLOWING:

             Please see the attached Exhibit "A"

If this agreement covers timber to be cut, minerals (including oil and gas),
fixtures or crops growing or to be grown, the legal description is:
____________________________________________________________________________

                                     -2-


<PAGE>   3





I am a(n)   [ ] individual   [ ] partnership     AGREE TO THE TERMS SET OUT ON
                                                 BOTH PAGE 1 AND PAGE 2 OF
            [ ] corporation ____________         THIS AGREEMENT. I have
                                                 received a copy of this
[ ] If checked, file this agreement in the real  document on today's date.
estate records.                                
Record Owner  (if not me): ___________________          
______________________________________________ 
______________________________________________      Bioanalytical Systems, Inc.
                                                          (Debtor's Name)    
                                               
The property will be used for                    By: \S\LINA L. REEVES-KERNER
         [ ] personal     [x] business               ------------------------
                                               
         [ ] agricultural [ ] _______ reasons    Title: Vice President 
                                                        ---------------------
         Bank One, Lafayette, NA               
         (Secured Party's Name)                  By:
                                                        --------------------- 
                                               
By: \S\MURRAY N. MARSHALL                        Title:      
    ---------------------                               ---------------------
                                               
Title: Vice President                                               
       ------------------                                        

                               
                                
                                        
                 
                                        






                                     - 3 -
[x] I 
<PAGE>   4

                                  EXHIBIT "A"


<TABLE>
<CAPTION>
QUANTITY                     DESCRIPTION
        <S>                 <C>
         1                   TSQ 7000 Basic System

         1                   APCI/ESI Source

         1                   TSQ 7000 Extended Warranty

         1                   Enhanced Alpha Workstation

         1                   Special as outlined below
                             Second copy of ICIS Software

         1                   B480-BA Alpha Station

         1                   RC21-WA VRC21-WA

</TABLE>


                          Bioanalytical Systems, Inc.

                         By: \S\LINA L. REEVES-KERNER
                             -------------------------------------------
                                        Title

                        Date: 8/30/96
                             -------------------------------------------


<PAGE>   1
                                                                  EXHIBIT 10.18

                             MASTER LEASE AGREEMENT


     This MASTER LEASE AGREEMENT is made, entered and dated as of Nov. 9, 1994,
by and between:

          LESSOR:                        LESSEE:

          BANC ONE LEASING CORPORATION   BIOANALYTICAL SYSTEMS, INC.
          2400 Corporate Exchange Drive  2701 Kent Avenue
          Columbus, Ohio 43231           West Lafayette, Indiana 47906

     1. LEASE OF EQUIPMENT: Lessor leases to Lessee, and Lessee leases from
Lessor, all the property described in the Lease Schedules which are signed from
time to time by Lessor and Lessee.

     2. CERTAIN DEFINITIONS: "Schedule" means each Lease Schedule signed by
Lessee and Lessor which incorporates the terms of this Master Lease Agreement,
together with all exhibits, riders, attachments and addenda thereto.
"Equipment" means the property described in each Schedule, together with all
attachments, additions, accessions, parts, repairs, improvements, replacements
and substitutions thereto.  "Lease", "herein", "hereunder", "here"  and similar
words mean this Master Lease Agreement and all Schedules, together with all
exhibits, riders, attachments and addenda to any of the foregoing, as the same
may from time to time be amended, modified or supplemented.  "Prime Rate" means
the prime rate of interest announced from time to time as the prime rate by
Bank One, Columbus, NA; provided, that the parties acknowledge that the Prime
Rate is not intended to be the lowest rate of interest charged by said bank in
connection with extensions of credit.  "Lien" means any security interest,
lien, mortgage, pledge, encumbrance, judgment, execution, attachment, warrant,
writ, levy, other judicial process or claim of any nature whatsoever by or of
any person.  "Fair Market Value" means the amount which would be paid for an
item of Equipment by an informed and willing buyer (other than a used equipment
or scrap dealer) and an informed and willing seller neither under a compulsion
to buy or sell.  "Lessor's Cost" means the invoiced price of any item of
Equipment plus any other cost to Lessor of acquiring an item of Equipment.  All
terms defined in the Lease are equally applicable to both the singular and
plural form of such terms.

     3. LEASE TERM AND RENT: The term of the lease of the Equipment described in
each Schedule ("Lease Term") commences on the date stated in the Schedule and
continues for the term stated therein.  As rent for the Equipment described in
each Schedule, Lessee shall pay Lessor the rent payments and all other amounts
stated in such Schedule, payable on the dates specified therein.  All payments
due under the Lease shall be made in United States dollars at Lessor's office
stated in the opening paragraph or as otherwise directed by Lessor in writing.

<PAGE>   2

        
     4. ORDERING, DELIVERY, REMOVAL AND INSPECTION OF EQUIPMENT: If an event of
default occurs or if for any reason Lessee does not accept, or revokes its
acceptance of, equipment covered by a purchase order or purchase contract or if
any commitment or agreement of Lessor to lease equipment to Lessee expires,
terminates or is otherwise canceled, then automatically upon notice from
Lessor, any purchase order or purchase contract and all obligations thereunder
shall be assigned to Lessee and Lessee shall pay and perform all obligations
thereunder.  Lessee agrees to pay, defend, indemnify and hold Lessor harmless
from any liabilities, obligations, claims, costs and expenses (including
reasonable attorney fees and expenses) of whatever kind imposed on or asserted
against Lessor in any way related to any purchase orders or purchase contracts.
Lessee shall make all arrangements for, and Lessee shall pay all costs of,
transportation, delivery, installation and testing of Equipment.  The Equipment
shall be delivered to Lessee's premises stated in the applicable Schedule and
shall not be removed without Lessor's prior written consent.  Lessor has the
right upon reasonable notice to Lessee to inspect the Equipment wherever
located.  Lessor may enter upon any premises where Equipment is located and
remove it immediately, without notice or liability to Lessee, upon the
expiration or other termination of the Lease Term.

     5. MAINTENANCE AND USE: Lessee agrees it will, at its sole expense:  (a)
repair and maintain the Equipment in good condition and working order and
supply and install all replacement parts or other devices when required to so
maintain the Equipment or when required by applicable law or regulation, which
parts or devices shall automatically become part of the Equipment; (b) use and
operate the Equipment in a careful manner in the normal course of its business
and only for the purposes for which it was designed in accordance with the
manufacturer's warranty requirements, and comply with all laws and regulations
relating to the Equipment, and obtain all permits or licenses necessary to
install, use or operate the Equipment; and (c) make no alterations, additions,
subtractions, upgrades or improvements to the Equipment without Lessor's prior
written consent, but any such alterations, additions, upgrades or improvements
shall automatically become part of the Equipment.  The Equipment will not be
used or located outside of the United States.

     6. NET LEASE; NO EARLY TERMINATION: The Lease is a net lease.  Lessee's
obligation to pay all rent and all other amounts payable under the Lease is
absolute and unconditional under any and all circumstances and shall not be
affected by any circumstances of any character including, without limitation,
(a) any setoff, claim, counterclaim, defense or reduction which Lessee may have
at any time against Lessor or any other party for any reason, or (b) any defect
in the condition, design or operation of, any lack of fitness for use of, any
damage to or loss of, or any lack of maintenance or service for any of the
Equipment.  Each Schedule is a noncancellable lease of the Equipment described
therein and Lessee's obligation to pay rent and perform all other obligations
thereunder and under the Lease are not subject to cancellation or termination
by Lessee for any reason.

     7. NO WARRANTIES BY LESSOR. LESSOR LEASES THE EQUIPMENT AS-IS, WHERE-IS, 
AND WITH ALL FAULTS.  LESSOR MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR
IMPLIED, OF ANY KIND AS TO THE EQUIPMENT INCLUDING, WITHOUT LIMITATION:  ITS
MERCHANTABILITY; ITS FITNESS FOR ANY PARTICULAR PURPOSE; ITS DESIGN, CONDITION,
QUALITY, CAPACITY, DURABILITY, CAPABILITY, SUITABILITY OR WORKMANSHIP; ITS
NON-INTERFERENCE WITH OR 

                                     -2-

<PAGE>   3

NON-INFRINGEMENT OF ANY PATENT, TRADEMARK, COPYRIGHT OR OTHER INTELLECTUAL
PROPERTY RIGHT; OR ITS COMPLIANCE WITH ANY LAW, RULE, SPECIFICATION, PURCHASE
ORDER OR CONTRACT PERTAINING THERETO.  Lessor hereby assigns to Lessee the
benefit of any assignable manufacturer's or supplier's warranties, but Lessor,
at Lessee's written request, will cooperate with Lessee in pursuing any
remedies Lessee may have under such warranties.  Any action taken with regard
to warranty claims against any manufacturer or supplier by Lessee will be at
Lessee's sole expense.  LESSOR MAKES NO REPRESENTATIONS OR WARRANTIES EXPRESS
OR IMPLIED, OF ANY KIND AS TO THE FINANCIAL CONDITION OR FINANCIAL STATEMENTS
OF ANY PARTY OR AS TO THE TAX OR ACCOUNTING TREATMENT OR CONSEQUENCES OF THE
LEASE, THE EQUIPMENT OR THE RENTAL PAYMENTS.
        
     8. INSURANCE: Lessee at its sole expense shall at all times keep each item
of Equipment insured against all risks of loss or damage from every cause
whatsoever for an amount not less than the greater of the full replacement
value or the Lessor's Cost of such item of Equipment.  Lessee at its sole
expense shall at all times carry public liability and property damage insurance
in amounts satisfactory to Lessor protecting Lessee and Lessor from liabilities
for injuries to persons and damage to property of others relating in any way to
the Equipment.  All insurers shall be reasonably satisfactory to Lessor.
Lessee shall deliver to Lessor satisfactory evidence of such coverage.
Proceeds of any insurance covering damage or loss of the Equipment shall be
payable to Lessor as loss payee and shall, at Lessor's option, be applied
toward (a) the replacement, restoration or repair of the Equipment, or (b)
payment of the obligations of Lessee under the Lease.  Proceeds of any public
liability or property insurance shall be payable first to Lessor as additional
insured to the extent of its liability, then to Lessee.  If an event of default
occurs and is continuing, or if Lessee fails to make timely payments due under
Section 9 hereof, then Lessee automatically appoints Lessor as Lessee's
attorney-in-fact with full power and authority in the place of Lessee and in
the name of Lessee or Lessor to make claim for, receive payment of, and sign
and endorse all documents, checks or drafts for loss or damage under any such
policy.  Each insurance policy will require that the insurer give Lessor at
least 30 days prior written notice of an y cancellation of such policy and will
require that Lessor's interests remain insured regardless of any act, error,
omission, neglect or misrepresentation of Lessee.  The insurance maintained by
Lessee shall be primary without any right of contribution from insurance which
may be maintained by Lessor.
        
     9. LOSS AND DAMAGE: (a) Lessee bears the entire risk of loss, theft, damage
or destruction of Equipment in whole or in part from any reason whatsoever
("Casualty Loss").  No Casualty Loss to Equipment shall relieve Lessee from the
obligation to pay rent or from any other obligation under the Lease.   In the
event of Casualty Loss to any item of Equipment, Lessee shall immediately
notify Lessor of the same and Lessee shall, if so directed by Lessor,
immediately repair the same.  If Lessor determines that and item of Equipment
has suffered a Casualty Loss beyond repair ("Lost Equipment"), then Lessee, at
the option of Lessor, shall:  (1) Immediately replace the Lost Equipment with
similar equipment in good repair, condition and working order free and clear of
any Liens and deliver to Lessor a bill of sale covering the replacement
equipment, in which event such replacement equipment shall automatically be
Equipment under the Lease; or (2) On the rent 

                                     -3-

<PAGE>   4



payment date which is at least 30 but no more than 60 days after the date of
the Casualty Loss, pay to Lessor all amounts then due and payable by Lessee
under the Lease for the Lost Equipment plus the Stipulated Loss Value for such
Lost Equipment as of the date of the Casualty Loss.  Upon payment by Lessee of
all amounts due under the above clause (2), the lease of the Lost Equipment
will terminate and Lessor shall transfer to Lessee all of Lessor's right, title
and interest in such Equipment on an "as-is, where-is" basis with all faults,
without recourse and without representation or warrant of any kind, express or
implied.
        
     (b) "Stipulated Loss Value" of any item of equipment during its Lease Term
equals the present value discounted in arrears to the applicable date at the
applicable SLV Discount Rate of (1) the remaining rents and all other amounts
[including, without limitation, any balloon payment and, as to a terminal
rental adjustment clause ("TRAC") lease, the TRAC value stated in the Schedule,
and any other payments required to be paid by Lessee at the end of the
applicable [Lease Term] payable under the Lease for such item on and after such
date to the end of the applicable Lease Term and (2) an amount equal to the
Economic Value of the Equipment.  For any item of Equipment, "Economic Value"
means the Fair Market Value of the Equipment at the end of the applicable Lease
Term as originally anticipated by Lessor at the Commencement Date of the
applicable Schedule; provided, that Lessee agrees that such value shall be
determined by the books of Lessor as of the Commencement Date of the applicable
Schedule.  After the payment of all rent due under the applicable Schedule and
the expiration of the Lease Term of any item of Equipment, the Stipulated Loss
Value of such item equals the Economic Value of such item.  Stipulated Loss
Value shall also include any Taxes payable by Lessor in connection with its
receipt thereof.  For any item of Equipment, "SLV Discount Rate" means an
interest rate equal to the Prime Rate in effect on the Commencement Date of the
Schedule for such item minus two percentage points.
        
     10. TAX BENEFITS INDEMNITY: (a) The Lease has been entered into on the 
basis that Lessor shall be entitled to such deductions, credits and other tax
benefits as are provided by federal, state and local income tax law to an owner
of the Equipment (the "Tax Benefits") including, without limitation:  (1)
modified accelerated cost recovery deductions on each item of Equipment under
Section 168 of the Code (as defined below) in an amount determined commencing
with the taxable year in which the Commencement Date of the applicable Schedule
occurs, using the maximum allowable depreciation method available under Section
168 of the Code, using a recovery period (as defined in Section 168 of the
Code) reasonably determined by Lessor, and using an initial adjusted basis
which is equal to the Lessor's Cost of such item; (2) amortization of the
expenses paid by Lessor in connection with the Lease on a straight-line basis
over the term of the applicable Schedule; and (3) Lessor's federal taxable
income will be subject to the maximum rate on corporations in effect under the
Code as of the Commencement Date of the applicable Schedule.

     (b) If on any one or more occasions (1) Lessor shall lose, shall not have
or shall lose the right to claim all or any part of the Tax Benefits, (2) there
shall be reduced, disallowed, recalculated or recaptured all or any part of the
Tax Benefits, or (3) all or any part of the Tax Benefits is reduced by a change
in law or regulation (each of the events described in subparagraphs 1, 2 or 3
of this paragraph (b) will be referred to as a "Tax Loss"), then, upon 30 days
written notice by Lessor to 

                                     -4-

<PAGE>   5


Lessee that a Tax Loss has occurred, Lessee shall pay Lessor an amount which,
in the reasonable opinion of Lessor and after the deduction of all taxes
required to be paid by Lessor with respect to the receipt of such amount, will
provide Lessor with the same after-tax net economic yield which was originally
anticipated by Lessor as of the Commencement Date of the applicable Schedule.

     (c) A Tax Loss shall occur upon the earliest of:  (1) the happening of any
event (such as disposition or change in use of an item of Equipment) which may
cause such Tax Loss; (2) Lessor's payment to the applicable taxing authority of
the tax increase resulting from such Tax Loss; or (3) the adjustment of
Lessor's tax return to reflect such Tax Loss.

     (d) Lessor shall not be entitled to payment under this section for any Tax
Loss caused solely by one or more of the following events:  (1) a disqualifying
sale or disposition of an item of Equipment by Lessor prior to any default by
Lessee; (2) Lessor's failure to timely or properly claim the Tax Benefits in
Lessor's tax return; (3) a disqualifying change in the nature of Lessor's
business or liquidation thereof; (4) a foreclosure by any person holding
through Lessor a security interest on an item of Equipment which foreclosure
results solely from an act of Lessor; or (5) Lessor's failure to have
sufficient taxable income or tax liability to utilize the Tax Benefits.

     (e) "Code" shall mean the Internal Revenue Code of 1986, as amended.  For
the purposes of this section 10, the term "Lessor" shall include any affiliate
group (within the meaning of section 1504 of the Code) of which Lessor is a
member for any year in which a consolidated income tax return is filed for such
affiliated group.  Lessee's obligations under this section shall survive the
expiration, cancellation or termination of the Lease.

     11. GENERAL TAX INDEMNITY: Lessee will pay, and will defend, indemnify and
hold Lessor harmless on an after-tax basis from, any and all Taxes (as defined
below) and related audit and contest expenses on or relating to (a) any of the
Equipment, (b) the Lease, (c) purchase, acceptance, ownership, lease, use,
operation, transportation, return or other disposition of any of the Equipment,
and (d) rentals or earnings relating to any of the Equipment or the "Taxes"
means present and future taxes or other governmental charges that are not based
on the net income of Lessor, whether they are assessed to or payable by Lessee
or Lessor, including, without limitation (i) sales, use, excise, licensing,
registration, titling, franchise, business and occupation, gross receipts,
stamp and personal property taxes, (ii) levies, imposts, duties, assessments,
charges and withholdings, (iii) penalties, fines, and additions to tax and (iv)
interest on any of the foregoing.  Unless Lessor elects otherwise, Lessor will
prepare and file all reports and returns relating to any Taxes and will pay all
Taxes to the appropriate taxing authority.  Lessee will reimburse Lessor for
all such payments promptly on request.  On or after any applicable
assessment/levy/lien date for any personal property Taxes relating to any
Equipment, Lessee agrees that upon Lessor's request Lessee shall pay to Lessor
the personal property Taxes which Lessor reasonably anticipates will be due,
assessed, levied or otherwise imposed on any Equipment during its Lease Term. 
If Lessor elects in writing, Lessee will itself prepare and file all such
reports and returns, pay all such Taxes directly to the taxing authority, and
send Lessor evidence thereof.  Lessee's obligations under this section shall
survive the expiration, cancellation or termination of the Lease.

                                     -5-

<PAGE>   6


        
     12. GENERAL INDEMNITY: Lessee assumes all risk and liability for, and shall
defend, indemnify and keep Lessor harmless on an after-tax basis from, any and
all liabilities, obligations, losses, damages, penalties, claims, actions,
suits, costs and expenses, including reasonable attorney fees and expenses, of
whatsoever kind and nature imposed on, incurred by or asserted against Lessor,
in any way relating to or arising out of the manufacture, purchase, acceptance,
rejection, ownership, possession, use, selection, delivery, lease, operation,
condition, sale, return or other disposition of the Equipment or any part
thereof (including, without limitation, any claim for latent or other defects,
whether or not discoverable by Lessee or any other person, any claim for
negligence, tort or strict liability, any claim under any environmental
protection or hazardous waste law and any claim for patent, trademark or
copyright infringement.  Lessee will not indemnify Lessor under this section
for loss or liability arising from events which occur after the Equipment has
been returned to Lessor or for loss or liability caused directly and solely by
the gross negligence or willful misconduct of Lessor.  In this section,
"Lessor" also includes any director, officer, employee, agent, successor or
assign of Lessor.  Lessee's obligations under this section shall survive the
expiration, cancellation or termination of the Lease.

     13. PERSONAL PROPERTY: Lessee represents and agrees that the Equipment is,
and shall at all times remain, separately identifiable personal property.  Upon
Lessor's request, Lessee shall furnish Lessor a landlord's and/or mortgagee's
waiver and consent to remove all Equipment.  Lessor may display notice of its
interest in the Equipment by any reasonable identification.  Lessee shall not
alter or deface any such indicia of Lessor's interest.

     14. DEFAULT: Each of the following events shall constitute an event of
default under the Lease:  (a) Lessee fails to pay any rent or other amount due
under the Lease within ten days of its due date; or (b) Lessee fails to perform
or observe any of its obligations in Sections 8, 18, or 22 hereof; or (c)
Lessee fails to perform or observe any of its other obligations in the Lease
for more than 30 days after Lessor notifies Lessee of such failure; or (d)
Lessee or any Lessee affiliate defaults in the payment, performance or
observance of any obligation under any loan, credit agreement or other lease in
which Lessor or any subsidiary (direct or indirect) of Banc One Corporation
(which is Lessor's ultimate parent corporation) is the creditor or lessor; or
(e) any statement, representation or warranty made by Lessee in the Lease, in
any Schedule or in any document, certificate or financial statement in
connection with the Lease proves at any time to have been untrue or misleading
in any material respect as of the time when made; or (f) Lessee becomes
insolvent or bankrupt, or Lessee admits its inability to pay its debts as they
mature, or Lessee makes an assignment for the benefit of creditors, or Lessee
applies for, institutes or consents to the appointment of a receiver, trustee
or similar official for Lessee or any substantial part of its property or any
such official is appointed without Lessee's consent, or Lessee applies for,
institutes or consents to any bankruptcy, insolvency, reorganization, debt
moratorium, liquidation, or similar proceeding relating to Lessee or any
substantial part of its property under the laws of any jurisdiction or any such
proceeding is instituted against Lessee without stay or dismissal for more than
30 days, or Lessee commences any act amounting to a business failure or a
winding up of its affairs, or Lessee ceases to do business as a going concern;
or (g) with respect to any guaranty, letter of credit, pledge agreement,
security agreement, mortgage, deed of trust, debt subordination agreement or
other credit enhancement or 

                                     -6-

<PAGE>   7

credit support agreement (whether now existing of hereafter arising) signed or
issued by any party in connection with all or any part of Lessee's obligations
under the Lease, the party signing or issuing any such agreement defaults in
its obligations thereunder or any such agreement shall cease to be in full
force and effect or shall be declared to be null, void, invalid or
unenforceable by the party signing or issuing it; or (h) there shall occur in
Lessor's reasonable opinion any material adverse change in the financial
condition, business or operations of Lessee.   As used in this section 14, the
term "Lessee" also includes any guarantor (whether now existing or hereafter
arising) of all or any part of Lessee's obligations under the Lease and/for any
issuer of a letter of credit (whether now existing or hereafter arising)
relating to all or any part of Lessee's obligations under the Lease, and the
term "Lease" also includes any guaranty or letter of credit (whether now
existing or hereafter arising) relating to all or any part of Lessee's
obligations under the Lease.
        
     15. REMEDIES: If any event of default exists, Lessor may exercise in any
order one or more of the remedies described in the lettered subparagraphs of
this section, and Lessee shall perform its obligations imposed thereby:

     (a) Lessor may require Lessee to return any or all Equipment as provided
in the Lease.

     (b) Lessor or its agent may repossess any or all Equipment wherever found,
may enter the premises where the Equipment is located and disconnect, render
unusable and remove it, and may use such premises without charge to store or
show the Equipment for sale.

     (c) Lessor may sell any or all Equipment at public or private sale, with
or without advertisement or publication, may re-lease or otherwise dispose of
it or may use, hold or keep it.

     (d) Lessor may require Lessee to pay to Lessor on a date specified by
Lessor, with respect to any or all Equipment (i) all accrued and unpaid rent,
late charges and other amounts due under the Lease on or before such date, plus
(ii) as liquidated damages for loss of a bargain and not as a penalty, and in
lieu of any further payments of rent, the Stipulated Loss Value of the
Equipment on such date, plus (iii) interest at the Overdue Rate on the total of
the foregoing ("Overdue Rate" means an interest rate per annum equal to the
higher of 18% or 2% over the Prime Rate, but not to exceed the highest rate
permitted by applicable law).  The parties acknowledge that the foregoing money
damage calculation reasonably reflects Lessor's anticipated loss with respect
to the Equipment and the related Lease resulting from the event of default.  If
an event of default under section 14 (f) of this Master Lease Agreement exists,
then Lessee will be automatically liable to pay Lessor the foregoing amounts as
of the next rent payment date unless Lessor otherwise elects in writing.

     (e) Lessee shall pay all costs, expenses and damages incurred by Lessor
because of the event of default or its actions under this section, including,
without limitation any collection agency and/or attorney fees and expenses, any
costs related to the repossession, safekeeping, storage, repair, reconditioning
or disposition of the Equipment and any incidental and consequential damages.

                                     -7-

<PAGE>   8


     (f) Lessor may terminate the Lease and/or any or all Schedules, may sue to
enforce Lessee's performance of its obligations under the Lease and/or may
exercise any other right or remedy then available to Lessor at law or in
equity.

     Lessor is not required to take any legal process or give Lessee any notice
before exercising any of the above remedies.  None of the above remedies is
exclusive, but each is cumulative and in addition to any other remedy available
to Lessor.  Lessor's exercise of one or more remedies shall not preclude its
exercise of any other remedy.  No action taken by Lessor shall release Lessee
from any of its obligations to Lessor.  No delay or failure on the part of
Lessor to exercise any right hereunder shall operate as a waiver thereof, nor
as an acquiescence in any default, nor shall any single or partial exercise of
any right preclude any other exercise thereof or the exercise of any other
right.  After any default, Lessor's acceptance of any payment by Lessee under
the Lease shall not constitute a waiver by Lessor of such default, regardless
of Lessor's knowledge or lack of knowledge at the time of such payment, and
shall not constitute a reinstatement of the Lease if the Lease has been
declared in default by Lessor, unless Lessor has agreed in writing to reinstate
the Lease and to waive the default.
        
     If Lessor actually repossesses any Equipment, then it will use
commercially reasonable efforts under the then current circumstances to attempt
to mitigate its damages; provided, that Lessor shall not be required to sell,
re-lease or otherwise dispose of any Equipment prior to Lessor enforcing any of
the remedies described above.  Lessor may sell or re-lease the Equipment in any
manner it chooses, free and clear of any claims or rights of Lessee and without
any duty to account to Lessee with respect thereto except as provided below.
If Lessor actually sells or re-leases the Equipment, it will credit the net
proceeds of any sale of the Equipment, or the net present value (discounted at
the then current Prime Rate) of the rents payable under any new lease of the
Equipment, against and up to (but not exceeding) the Stipulated Loss Value of
the Equipment and any other amounts Lessee owes Lessor, or will reimburse
Lessee for and up to (but not exceeding) Lessee's payment thereof.  The term
"net" as used above shall mean such amount after deducting the costs and
expenses described in clause (e) above of this section.  If Lessor elects in
writing not to sell or re-lease any Equipment, it will similarly credit or
reimburse Lessee for Lessor's reasonable estimate of such Equipment's Fair
Market Value.

     16. LESSOR'S RIGHT TO PERFORM: If Lessee fails to make any payment under
the Lease or fails to perform any of its other agreements in the Lease
(including, without limitation, its agreement to provide insurance coverage as
stated in the Lease), Lessor may itself make such payment or perform such
agreement, and the amount of such payment and the amount of the expenses of
Lessor incurred in connection with such payment or performance shall be deemed
to be additional rent, payable by Lessee on demand.
        
     17. FINANCIAL REPORTS: Lessee agrees to furnish to Lessor:  (a) annual
financial statements setting forth the financial condition and results of
operation of Lessee (financial statements shall include the balance sheet,
income statement and changes in financial position and all notes thereto)
within 120 days of the end of each fiscal year of Lessee; (b) quarterly
financial statements setting forth the financial condition and results of
operation of Lessee within 60 days of the end of 

                                     -8-

<PAGE>   9


each of the first three fiscal quarters of Lessee; and (c) such other financial
information as Lessor may from time to time reasonably request including,
without limitation, financial reports filed by Lessee with federal
or state regulatory agencies.  All such financial information shall be prepared
in accordance with generally accepted accounting principles.  If Lessee fails
to furnish the annual financial statements to Lessor within 30 days of Lessor's
written request, then Lessor may, at its option, charge Lessee a
non-performance fee equal to all the rentals due under the Lease for the then
current month (unless otherwise prohibited by law) and such fees shall be
deemed to be additional rent, payable by Lessee on demand.

     18. NO CHANGES IN LESSEE: Lessee shall not:  (a) liquidate, dissolve or
suspend business; (b) sell, transfer or otherwise dispose of all or a majority
of its assets, except that Lessee may sell its inventory in the ordinary course
of its business; (c) enter into any merger, consolidation or similar
reorganization unless it is the surviving corporation; (d) transfer all or any
substantial part of its operations or assets outside of the United States of
America; or (e) without 30 days advance written notice to Lessor, change its
name or chief place of business.  Lessee shall at all times maintain a tangible
net worth which is no less than the greater of 75% of its tangible net worth as
of the date of the Master Lease Agreement or 75% of its highest tangible net
worth thereafter.

     19. LATE CHARGES: If any rent or other amount payable under the Lease is
not paid when due, then as compensation for the administration and enforcement
of Lessee's obligation to make timely payments, Lessee shall pay with respect
to each overdue payment on demand an amount equal to the greater of fifteen
dollars ($15.00) or five percent (5%) of the each overdue payment (but not to
exceed the highest late charge permitted by applicable law) plus any collection
agency fees and expenses.
        
     20. NOTICES; POWER OF ATTORNEY: (a) Service of all notices under the Lease
shall be sufficient if given personally or cornered or mailed to the party
involved at its respective address set forth herein or at such other address as
such party may provide in writing from time to time.  Any such notice mailed to
such address shall be effective three days after deposit in the United States
mail with postage prepaid.  (b) With respect to any power of attorney covered
by the Lease, the powers conferred on Lessor thereby:  are powers coupled with
an interest; are irrevocable; are solely to protect Lessor's interests under
the Lease; and do not impose any duty on Lessor to exercise such powers.
Lessor shall be accountable solely for amounts it actually receives as a result
of its exercise of such powers.

     21. ASSIGNMENT BY LESSOR: Lessor and any assignee of Lessor, with or
without notice to or consent of Lessee, may sell, assign, transfer or grant a
security interest in all or any part of Lessor's rights, obligations, title or
interest in the Equipment, the Lease, any Schedule or the amounts payable under
the Lease or any Schedule to any entity ( "transferee").  The transferee shall
succeed to all of Lessor's rights in respect to the Lease (including; without
limitation, all rights to insurance and indemnity protection described in the
Lease).  Lessee agrees to sign any acknowledgment and other documents
reasonably requested by Lessor or the transferee in connection with any such
transfer transaction.  Lessee, upon receiving notice of any such transfer
transaction, 

                                     -9-

<PAGE>   10

shall comply with the terms and conditions thereof.  Lessee agrees that it
shall not assert against any transferee any claim, defense, setoff, deduction
or counterclaim which Lessee may now or hereafter be entitled to assert against
Lessor.  Unless otherwise agreed in writing, the transfer transaction shall not
relieve Lessor of any of its obligations to Lessee under the Lease and Lessee
agrees that the transfer transaction shall not be construed as being an
assumption of such obligations by the transferee.
        
     22. NO ASSIGNMENT, SUBLEASE OR LIEN BY LESSEE: LESSEE SHALL NOT,
DIRECTLY OR INDIRECTLY, (a) MORTGAGE, ASSIGN, SELL, TRANSFER, OR OTHERWISE
DISPOSE OF THE LEASE OR ANY INTEREST THEREIN OR THE EQUIPMENT OR ANY PART
THEREOF, OR (b) SUBLEASE, RENT, LEND OR TRANSFER POSSESSION OR USE OF THE
EQUIPMENT OR ANY PART THEREFOR TO ANY PARTY, OR (c) CREATE, INCUR, GRANT,
ASSUME OR ALLOW TO EXIST ANY LIEN ON THE LEASE, ANY SCHEDULE.  THE EQUIPMENT OR
ANY PART THEREOF.

     23. EXPIRATION OF LEASE TERM: (a) At least 90 days (or earlier if otherwise
specified), but no more than 270 days prior to expiration of the Lease Term of
each Schedule, Lessee shall give Lessor written notice of its electing one of
the following options for all (but not less than all) of the Equipment covered
by such Schedule:  return the Equipment under clause (b) below; or purchase the
Equipment under clause (c) below.  The election of an option shall be
irrevocable.  If Lessee fails to give timely notice of its election, it shall
be deemed to have elected to return the Equipment.

     (b) If Lessee elects or is deemed to have elected to return the Equipment
at the expiration of the Lease Term of a Schedule or if Lessee is obligated at
any time to return the Equipment, then Lessee shall, at its sole expense and
risk, deinstall, disassemble, pack, crate, insure and return the Equipment to
Lessor (all in accordance with applicable industry standards) at any location
in the continental United States of America selected by Lessor.  The Equipment
shall be in the same condition as when received by Lessee, reasonable wear,
tear and depreciation resulting from normal and proper use excepted (or, if
applicable, in the condition set forth in the Lease or the Schedule), shall be
in good operating order and maintenance as required by the Lease, shall be
certified as being eligible for any available manufacturer's maintenance
program, shall be free and clear of any Liens as required by the Lease, shall
comply with all applicable laws and regulations and shall include all manuals,
specifications, repair and maintenance records and similar documents.  Until
Equipment is returned as required above, all terms of the Lease shall remain in
full force and effect including, without limitation, obligations to pay rent
and insure the Equipment; provided, that after the expiration of any Schedule
and before Lessee has completed its return of the Equipment or its purchase
option (if elected), the term of the lease of the Equipment covered by such
Schedule shall be month-to-month or such shorter period as may be specified by
Lessor.
        
     (c) If Lessee gives Lessor timely notice of its election to purchase
Equipment, then on the expiration date of the applicable Schedule Lessee shall
purchase all (but not less than all) of the Equipment and shall pay to Lessor
the Fair Market Value of the Equipment plus all Taxes (other than 

                                    -10-

<PAGE>   11


income taxes on Lessor's gains on such sale), costs and expenses incurred or
paid by Lessor in connection with such sale plus all accrued but unpaid amounts
due with respect to the Equipment and/or the Schedule.  The Stipulated Loss
Value or Economic Value of any item of Equipment shall have no bearing or
influence on the determination of Fair Market Value under this clause (c). 
Upon payment in full of the above amounts, and if no default has occurred and
is continuing under the Lease, Lessor shall transfer title to such Equipment to
Lessee "as-is, where-is" with all faults and without recourse to Lessor and
without any representation or warranty of any kind whatsoever by Lessor,
express or implied.
        
     (d) For purposes of the purchase option of the Lease, the determination of
the Fair Market Value of any Equipment shall be determined (1) without
deducting any costs of dismantling or removal from the location of use, (2) on
the assumption that the Equipment is in the condition required by the
applicable return and maintenance provisions of the Lease and is free and clear
of any Liens as required by the Lease, and (3) shall be determined by mutual
agreement of Lessee and Lessor or, if Lessor and Lessee are not able to agree
on such value, by the Appraisal Procedure.  "Appraisal Procedure" means the
determination of Fair Market Value by an independent appraiser acceptable to
Lessor and Lessee, or, if the parties are unable to agree on an acceptable
appraiser, by averaging the valuation (disregarding the one which differs the
most from the other two) of three independent appraisers, the first appointed
by Lessor, the second appointed by Lessee and the third appointed by the first
two appraisers.  For purposes of the "Remedies" section of the Lease, the Fair
Market Value shall be determined by Lessor in good faith and any such valuation
shall be on an "as-is, where is" basis without regard to the first sentence of
this clause (d).  Lessee, at its sole expense, shall: pay all fees, costs and
expenses of the above described appraisers.

     24. GOVERNING LAW: THE INTERPRETATION, CONSTRUCTION AND VALIDITY OF THE
LEASE SHALL BE GOVERNED BY THE LAWS OF THE STATE OF OHIO.  WITH RESPECT TO ANY
ACTION BROUGHT BY LESSOR AGAINST LESSEE TO ENFORCE ANY TERM OF THE LEASE,
LESSEE HEREBY IRREVOCABLY CONSENTS TO THE JURISDICTION AND VENUE OF ANY STATE
OR FEDERAL COURT IN THE FRANKLIN COUNTY, OHIO, WHERE LESSOR HAS ITS PRINCIPAL
PLACE OF BUSINESS AND WHERE PAYMENTS ARE TO BE MADE BY LESSEE.

     25. MISCELLANEOUS: (a) Subject to the limitations herein, the Lease
shall be binding upon and inure to the benefit of the parties hereto and their
respective heirs, administrators, successors and assigns.  (b) This Master
Lease Agreement and each Schedule may be executed in any number of
counterparts, which together shall constitute a single instrument.  Only one
counterpart of each Schedule shall be marked "Lessor's Original" and all other
counterparts shall be marked "Duplicate".  A security interest in any Schedule
may be created through transfer and possession only of the counterpart marked
"Lessor's Original".  (c) Section and paragraph headings in this Master Lease
Agreement and the Schedules are for convenience only and have no independent
meaning.  (d) The terms of the Lease shall be severable and if any term thereof
is declared unconscionable, invalid, illegal or void, in whole or in part, the
decision so holding shall not be construed as impairing the other terms of the
Lease and the Lease shall continue in full force and effect as if such invalid,
illegal, 

                                    -11-

<PAGE>   12

void or unconscionable term were not originally included herein.  (e) All
indemnity obligations of Lessee under the Lease and all rights, benefits and
protections provided to Lessor by warranty disclaimers shall survive the
cancellation, expiration or termination of the Lease.  (f) Lessor shall not be
liable to Lessee for any indirect, consequential or special damages for any
reason whatsoever.  (g) Each payment made by Lessee shall be applied by Lessor
in such manner as Lessor determines in its discretion which may include,
without limitation, application as follows:  first, to accrued late charges;
second, to accrued rent; and third, the balance to any other amounts then due
and payable by Lessee under the Lease.  (h) If the Lease is signed by more than
one Lessee, each of such Lessees shall be jointly and severally liable for
payment and performance of all of Lessee's obligations under the Lease.
        
     26. ENTIRE AGREEMENT: THE LEASE REPRESENTS THE FINAL, COMPLETE AND ENTIRE
AGREEMENT BETWEEN THE PARTIES HERETO.  THERE ARE NO ORAL OR UNWRITTEN
AGREEMENTS OR UNDERSTANDINGS AFFECTING THE LEASE OR THE EQUIPMENT.  Lessee
agrees that Lessor is not the agent of any manufacturer or supplier, that no
manufacturer or supplier is an agent of Lessor, and that any representation,
warranty or agreement made by a manufacturer, supplier or their employees,
sales representatives or agents shall not be binding on Lessor.

     27. JURY WAIVER: ALL PARTIES TO THIS MASTER LEASE AGREEMENT WAIVE ALL
RIGHTS TO TRIAL BY JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM BROUGHT BY
ANY PARTY AGAINST ANY OTHER PARTY ON ANY MATTER WHATSOEVER ARISING OUT OF, IN
CONNECTION WITH OR IN ANY WAY RELATED TO THIS MASTER LEASE AGREEMENT.


         BANC ONE LEASING CORPORATION  BIOANALYTICAL SYSTEMS, INC.

         Lessor                        Lessee



         By:\S\ILLEGIBLE               By:\S\PETER T. KISSINGER
            -------------------------     ----------------------------

         Title: AVP                    Title: President
               ----------------------        -------------------------

                                       Lessee's Witness:\S\E.C. BANNON
                                                        --------------

                                    -12-

<PAGE>   13


     Regardless of any prior, present or future oral agreement or course of
dealing, no term or condition of the Lease may be amended, modified, waived,
discharged, canceled or terminated except by a written instrument signed by the
party to be bound; except Lessee authorizes Lessor to complete the Acceptance
Date of each Schedule and the serial numbers of any Equipment.
        
                        BIOANALYTICAL SYSTEMS, INC.



                        By:\S\PETER T. KISSINGER        
                           -----------------------------

                        Title:President
                              --------------------------

                                    -13-


<PAGE>   1

                                                                  EXHIBIT 10.19

                                                                 FINANCIAL LEASE

LEASE SCHEDULE NO.   1000035355

LESSOR: BANC ONE LEASING CORPORATION

LESSEE: Bioanalytical Systems, Inc.

1.  GENERAL.  Reference is made to the Master Lease Agreement dated as of
11/9/94 as amended from time to time ("Master Lease"), between the above Lessee
and Lessor.  This Lease Schedule is signed and delivered under the Master
Lease. Unless otherwise defined herein, capitalized terms defined in the Master
Lease will have the same meaning when used in this Schedule.

2.  FINANCING.  Lessor finances for Lessee, and Lessee finances with Lessor,
all of the property ("Equipment") described below:


<TABLE>
<CAPTION>
         Quantity:      Description (New Unless specified as Used)   Amount Financed
         <S>                                                                      <C>                   <C>   
         See Attached Schedule A-1                                                 Equip. Cost            422,250.00
                                                                                   Filing Fee                 200.00
                                                                                               
                                                                                               
                                                                                   TOTAL                $ 422,450.00


</TABLE>
  3.            FINANCING TERM AND INSTALLMENT PAYMENTS.  The Lease Term for
the Equipment begins on the earlier of the Acceptance Date or the Commencement
Date and continues for the Number of months after the Commencement Date as
stated in the Lease Term box below.  The Acceptance Date is the date that
Lessor accepts this Schedule as stated below Lessor's signature.  The
Commencement Date is the [ ] 1st [ ]  15th day of the month in which the
Acceptance Date occurs.

<TABLE>
<CAPTION>
              Lease Term                      Number of Payments             Installment Payments (excluding taxes)
                <S>                                   <C>                               <C>
                                                                                           
                  60                                  60
                                                                                        8,542.02
                Months
</TABLE>

PAYMENT DUE DATES: On the Commencement Date and on the same day of each Month
thereafter until paid in full.  Total Advance Payment of $8,542.02 to be
applied as follows:

<TABLE>
<S>                       <C>                               <C>                         <C>
$                         Security Deposit                  $8,542.02                    First and Last 0 Payment(s)

$                         Set-up/Filing/Search Fees         $                            Other (Specify)
</TABLE>

Lessee shall pay to Lessor all amounts stated above on the dates stated above,
except that the Total Advance Payment is due on the Commencement Date.  There
shall be added to each installment payment all applicable Taxes as in effect
from time to time.

  4.            SECURITY INTEREST.  This Schedule is not intended to be a true
lease, but is intended to be a secured debt financing transaction.  As
collateral security for payment and performance of all Secured Obligations (as
defined in Paragraph A on the reverse side of this Schedule)and to induce
Lessor to extend credit from time to time to Lessee (under the Lessor
otherwise), Lessee hereby grants to Lessor a first priority security interest
in all of Lessee's right, title and interest in the Equipment, whether now
existing or hereafter acquired, and in all Proceeds (as defined in Paragraph A
on the reserve side of this Schedule).  Lessee represents, warrants and agrees
that Lessee currently is the lawful owner of the Equipment and that good and
marketable title to the Equipment shall remain with Lessee at all times.
Lessee represents, warrants and agrees: that Lessee has granted to Lessor a
first priority security interest in the Equipment and all Proceeds; and that
the Equipment and all Proceeds are, and at all times shall be, free and clear
of any Liens other than Lessor's security interest therein.  Lessee at its sole
expense will protect and defend Lessor's first priority security interest in
the Equipment against all claims and demands whatsoever.

  5.            LESSEE'S ASSURANCES.  Lessee irrevocably and unconditionally:
(a) reaffirms all of the terms and conditions of the Master Lease and agrees
that the Master Lease remains in full force and effect; (b) agrees that the
Equipment is and will be used at all times solely for commercial purposes, and
not for personal, family or household purposes; and (c) incorporates all of the
terms and conditions of the Master Lease as if fully set forth in this
Schedule.

  6.            PURCHASE ORDERS AND ACCEPTANCE OF EQUIPMENT.  Lessee agrees
that (i) Lessor has not selected, manufactured, sold or supplied any of the
Equipment, (ii) Lessee has selected all of the Equipment and its suppliers; and
(iii) Lessee has received a copy of, and approved, the purchase orders or
purchase contracts for the Equipment.  AS BETWEEN LESSEE AND LESSOR, LESSEE
AGREES THAT: (A) LESSEE HAS RECEIVED, INSPECTED AND APPROVED ALL OF THE
EQUIPMENT; (B) ALL EQUIPMENT IS IN GOOD WORKING ORDER AND COMPLIES WITH ALL
PURCHASE ORDERS OR CONTRACTS AND ALL APPLICABLE SPECIFICATIONS; (C) LESSEE
IRREVOCABLY ACCEPTS ALL EQUIPMENT FOR PURPOSES OF THE LEASE "AS-IS, WHERE-IS"
WITH ALL FAULTS; AND (D) LESSEE UNCONDITIONALLY WAIVES ANY RIGHT THAT IT MAY
HAVE TO REVOKE ITS ACCEPTANCE OF THE EQUIPMENT.

  7.            MISCELLANEOUS:.




LESSEE HAS READ AND UNDERSTOOD ALL OF THE TERMS OF THIS SCHEDULE.  LESSEE
AGREES THAT THERE ARE NO ORAL OR UNWRITTEN AGREEMENTS WITH LESSOR REGARDING THE
EQUIPMENT OR THIS SCHEDULE.  THIS SCHEDULE IS EXPRESSLY SUBJECT TO THE TERMS
AND CONDITIONS ON THE REVERSE SIDE OF THIS SCHEDULE.


<TABLE>
<S>                                                       <C>
Accepted by:                                                BIOANALYTICAL SYSTEMS, INC.
BANC ONE LEASING CORPORATION                                (Name of Lessee)

By: Illegible                                               By: /s/ PETER T. KISSINGER

Title: AVP                                                  Title: PRESIDENT

Acceptance Date: 11/15/94                                   Witness Signature: Illegible

</TABLE>
<PAGE>   2
                        ADDITIONAL TERMS AND CONDITIONS

         The following terms and conditions are expressly made a part of and
incorporated in the Schedule on the front side hereof.

         A. CERTAIN DEFINITIONS.  "Second Obligations" means (i) all payments
and other obligations of Lessee under or in connection with this Schedule, and
(ii) all payments and other obligations of Lessee (whether now existing or
hereafter incurred) under or in connection with the Master Lease and all present
and future Lease Schedules thereto, and (iii) all other leases, indebtedness,
liabilities and/or obligations of any kind (whether now existing or hereafter
incurred, absolute or continent, direct or indirect) of Lessee to Lessor or to
any affiliate of either Lessor or Banc One Corporation.  "Proceeds" means all
cash and non-cash proceeds of the Equipment including, without limitation,
insurance proceeds and warranty proceeds.
        
         B. AMENDMENTS TO MASTER LEASE.   FOR PURPOSES OF THIS SCHEDULE ONLY,
Lessee and Lessor agree to amend the Master Lease as follows: (i) public
liability or property insurance as described in the second sentence of Section 8
will not be required; (ii) the definition of "Stipulated Loss Value" in clause
(b) of Section 9 is deleted and replaced by Paragraph C below of this Schedule;
(iii) the text of Section 10 is deleted in its entirety; (iv) Subsections 23(a)
and 23(c) are deleted; (v) Subsection 23(b) and the last sentence of Section 4
will apply only if an event of default occurs; and (vi) all references in the
Lease as it relates to this Schedule to "Lessee" and "Lessor" shall be amended
to "Borrower" and "Lender" respectively.
        
         C. STIPULATED LOSS VALUE.  FOR PURPOSES OF THIS SCHEDULE ONLY, the 
"Stipulated Loss Value" of any item of Equipment during its Lease Term equals
the aggregate of the following as of the date specified by Lessor; (i) all
accrued and unpaid interest, late charges and other amounts due under this
Schedule and the Master Lease to the extent it relates to this Schedule as of
such specified date, plus (ii) the remaining principal balance due and payable
by Lessee under this Schedule as of such specified date, plus (iii) interest on
the total described in the foregoing clauses (i) and (ii) at the Overdue Rate
commencing with the specified date; provided, that the foregoing calculation
shall not exceed the maximum amount which may be collected by Lessor from Lessee
under applicable law in connection with enforcement of Lessor's rights under
this Schedule and the Master Lease to the extent it relates to this Schedule.
        
         D. CONDITIONS.  No lease of Equipment under this Schedule shall be 
binding on Lessor unless: (a) Lessor has received evidence of all required
insurance; (b) in Lessor's sole judgment, there has been no material adverse
change in the financial condition or business of Lessee or any guarantor; (c)
Lessee has signed and delivered to Lessor this Schedule, which must be
satisfactory to Lessor, and Lessor has signed and accepted this Schedule ;(d)
Lessor has received, in form and substance satisfactory to Lessor, such other
documents and information as Lessor shall reasonably request; and (e) Lessee has
satisfied all other reasonable conditions established by Lessor.
        
         E. OTHER DOCUMENTS: EXPENSES.  Lessee agrees to sign and deliver to
Lessor any additional documents deemed desirable by Lessor to effect the terms
of the Master Lease or this Schedule including, without limitation, Uniform
Commercial Code financing statements which Lessor is authorized to file with
the appropriate filing officers.  Lessee hereby irrevocably appoints Lessor as
Lessee's attorney-in-fact with full power and authority in the place of Lessee
and in the name of Lessee to prepare, sign, amend, file or record any Uniform
Commercial Code financing statements or other documents deemed desirable by
Lessor to perfect, establish or give notice of Lessor's security interest in
the Equipment or in any other collateral as to which Lessee has granted Lessor
a security interest.  Lessee shall pay upon Lessor's written request any actual
out-of-pocket costs and expenses paid or incurred by Lessor in connection with
the above terms of this section or the funding and closing of this Schedule.

         F. SECURITY DEPOSIT. As collateral for Lessee's obligations under the
Lease, Lessee hereby grants to Lessor a security interest in the sums specified
in this Schedule as a "Security Deposit".  As its option, Lessor may apply all
or any part of said Security Deposit to cure any default of Lessee under the
Lease.  If upon final termination of this Schedule, Lessee has fulfilled all of
the terms and conditions hereof, then Lessor shall pay to Lessee any remaining
balance of the Security Deposit for this Schedule, without interest.
        
         G. REPRESENTATIONS AND WARRANTIES.  Lessee represents and warrants 
that: (a) Lessee is a corporation, partnership or proprietorship duly organized,
validly existing and in good standing under the laws of the state of its
organization and is qualified to do business and is in good standing under the
laws of each other state in which the Equipment is or will be located; (b)
Lessee has full power, authority and legal right to sign, deliver and perform
the Master Lease, this Schedule and all related documents and such actions have
been duly authorized by all necessary corporate, partnership or proprietorship
action; and (c) the Master Lease, this Schedule and each related document has
been duly signed and delivered by Lessee and  each such document constitutes a
legal, valid and binding obligation of Lessee enforceable in accordance with its
terms.
        
         H. LESSEE TO PAY ALL TAXES.  FOR PURPOSES OF THIS SCHEDULE AND ITS 
EQUIPMENT ONLY: Lessee shall pay any and all Taxes relating to this Schedule and
its Equipment directly to the applicable taxing authority; Lessee shall prepare
and file all reports or returns concerning any such Taxes as may be required by
applicable law or regulation (provided, that Lessor shall not be identified as
the owner of the Equipment in such reports or returns); and Lessee shall, upon
Lessor's request, send Lessor evidence of payment of such Taxes and copies of   
any such reports or returns.
        
                                     -2-

<PAGE>   1
                                                                EXHIBIT 10.20




                               PURCHASE AGREEMENT
                       COMMERCIAL-INDUSTRIAL REAL ESTATE


1.       PARTIES: Great Lakes Chemical Corporation, a Delaware corporation
         ("Seller") agrees to sell and convey to Bioanalytical Systems, Inc.,
         an Indiana corporation ("Buyer") and Buyer agrees to buy from Seller
         the following property for the consideration and upon and subject to
         the terms, provisions, and conditions hereinafter set forth.

2.       PROPERTY: The property commonly known as The Great Lakes Annex
         Building, 2801 Kent Avenue, is a tract of land situated in the City of
         West Lafayette, Tippecanoe County, Indiana, together with all the
         buildings and permanent improvements and fixtures attached thereto
         (see Exhibit A); and all privileges, and appurtenances pertaining
         thereto including any right, title and interest of Seller in and to
         adjacent streets, alleys, or rights-of-way, Seller's interest in and
         to all leases or rents, and security deposits, Seller's interest in
         and to all licenses and permits with respect to the Property, Seller's
         interest in all service, maintenance, management or other contracts
         relating to the ownership or operation of the Property, and Seller's
         interest in all warranties or guaranties relating to the Property
         being sold; all of the above hereinafter collectively called
         "Property", and whose legal description will be provided upon
         completion  of the Survey.

3.       PRICE: The total purchase price shall be One Million Nine Hundred
         Thousand and 00/100 Dollars ($1,900,000.00) payable in accordance with
         the terms and conditions stated in this Agreement.

4.       EARNEST MONEY: Twenty Thousand and 00/100 Dollars ($20,000.00) is
         herewith tendered and is to be deposited as Earnest Money with The
         Shook Agency, Inc. as Escrow Agent, upon execution of the Agreement by
         both parties.  The Escrow Agent shall hold the Earnest Money in an
         interest-bearing account with interest to be disbursed with the
         Earnest Money in accordance with this Agreement.  If this Agreement is
         terminated by the Buyer, as provided herein and within the applicable
         time period, the Earnest Money shall be returned to the Buyer.

5.       CONTINGENCIES: In addition to those other conditions addressed herein,
         closing of this transaction shall be specifically contingent upon
         satisfaction of the following items:

         A.      Buyer's receipt of Preliminary Plat Approval from the
         Tippecanoe County Area Plan Commission for the purpose of joining
         Buyer's property with the Seller's property to form one lot.  Buyer
         shall bear all costs and expenses relating to and arising from the
         process of obtaining Preliminary Plat Approval.

         B.      Buyer's obtaining a Phase I environmental report, at Buyer's
         expense, satisfactory to Buyer at Buyer's sole discretion.



<PAGE>   2

         C.      Buyer shall have satisfied itself, in Buyer's sole discretion
         and without warranty or representation by Seller, with the nature and
         condition of the Property such that Buyer shall take the Property on
         the terms specified in Paragraph 8, below.

         D.      Buyer's receipt of a commitment for suitable financing for the
         acquisition of the Property and modification of the improvements.

         E.      Execution of a lease between Buyer and Seller, on mutually
         acceptable terms and conditions, for the lease of office space at the
         Property by Seller.

         F.      Buyer obtaining written approval and authorization of this
         transaction from its Board of Directors, Bank One, Primus Ventures and
         Middlewest Ventures, Inc.

         G.      Seller shall make available for one (1) year after the closing
         of this transaction, on an "as needed" basis, and at Buyer's expense,
         Seller's maintenance personnel for the purpose of consulting with
         Buyer on the management and maintenance of the Property's operating
         systems.

         H.      The Purdue Research Park restrictive covenants grant a right
         of first refusal to Purdue Research Foundation for all property sold
         or resold in Phase I of the Park.  Accordingly, Seller must obtain
         from the Purdue Research Foundation in advance of closing a waiver of
         any and all of their rights under the Park's restrictive covenants.

6.       CLOSING.  The closing of the sale (the "Closing Date") shall take
         place at the Title Company who insures this transaction or at the
         institution providing financing within thirty (30) days after all
         contingencies and conditions addressed herein are satisfied to the
         mutual satisfaction of the parties.  If the contingencies set forth in
         this Agreement have not been satisfied within one hundred eight (180)
         days of execution of this Agreement by both parties, either party may,
         by written notice to the other, terminate this Agreement in which
         event the Escrow Agent shall disburse the Earnest Money to the Buyer
         and the parties shall thereafter have no further obligations
         hereunder.

7.       POSSESSION: Possession of the Property shall be delivered to Buyer at
         closing subject to tenant's rights, if applicable, in its present
         condition, ordinary wear and tear expected.  Seller agrees to maintain
         the property and related equipment in good condition until possession
         is delivered to Buyer.

8.       Seller has provided Buyer access to the Property and Buyer
         acknowledges having had opportunity to make such independent factual,
         physical and legal examinations and inquiries as Buyer deems necessary
         or desirable.  As a result, Buyer has had adequate opportunity to
         become fully acquainted with the nature and condition of the Property
         in all respects and, except as provided in Section 21 below, shall
         acquire the Property, if at all, AS IS, WHERE IS AND WITH ALL FAULTS.

                                     -2-

<PAGE>   3


9.       TAXES: All taxes assessed for any prior calendar year and remaining
         unpaid, shall be paid by the Seller, and all taxes assessed for the
         current calendar year shall be prorated between Seller and Buyer on a
         calendar-year basis as of the day immediately prior to the Closing
         Date.  If the tax rate for taxes assessed in the current year has not
         been determined at the closing of the transaction, said rate shall be
         assumed to be the same as the prior year for the purpose of such
         proration and credit for due but unpaid taxes.

10.      INSURANCE: Insurance shall be canceled as of the date of closing and
         the Buyer shall provide its own insurance.

11.      SURVEY: A staked survey that complies with Minimum Standard Detail
         Requirements for Indiana Land Title Surveys, and which shall reflect
         whether the property is located in a designated flood zone area, shall
         be furnished at Seller's expense.

12.      TITLE AND SURVEY APPROVAL: Seller shall deliver to Buyer within
         fifteen (15) days after completion of the survey a Commitment for
         Title Insurance (the "Commitment") and, at Buyer's request, legible
         copies of all recorded instruments affecting the Property and recited
         as exceptions in the Commitment.  If Buyer has an objection to items
         disclosed in such Commitment or the survey provided for herein, Buyer
         shall promptly make written objections to Seller after receipt of each
         such instrument.  If Buyer or third party lender makes such objections
         or if the objections are disclosed in the Commitment, the survey or by
         the issuer of the Title Policy, Seller shall have thirty (30) days
         from the date such objections are disclosed to cure the same, and the
         Closing Date shall be extended, if necessary.  Seller agrees to
         utilize its best efforts and reasonable diligence to cure such
         objection, if any.  If the objections are not satisfied within such
         time period, Buyer may either terminate this Agreement or waive the
         unsatisfied objections and close the transaction.

13.      SALES EXPENSES: Seller and Buyer agree that all sales expenses are to
         be paid in cash prior to or at the closing.

         A.      Seller's Expenses: Seller agrees to pay all costs of releasing
         existing loans and recording the releases; Owner's Title Policy;
         survey;  1/2 of any closing fee, preparation of Deed and Vendor's
         Affidavit; and other expenses stipulated to be paid by Seller under
         other provisions of this Agreement.

         B.      Buyer's Expenses: Buyer agrees to pay all expenses incident to
         any loan (e.g., loan commitment fees, preparation of note, mortgage,
         and other loan documents, recording fees, Mortgagee's Title Policy,
         prepayable interest, credit reports);  1/2 of any closing fee; and
         expenses stipulated to be paid by Buyer under other provisions of this
         Agreement.


                                     -3-
<PAGE>   4

14.      DEFAULT: If Buyer breaches this Agreement and is in default,
         Seller may seek specific performance or any other remedy
         provided by law or equity; or Seller may treat this Agreement
         as being terminated and receive the Earnest Money as
         liquidated damages.

         If Seller breaches this Agreement and is in default, then the Earnest
         Money shall be returned to Buyer.  In addition, if Seller is in
         default, the Buyer may seek specific performance or any other remedy
         provided by law or equity against the Seller.

15.      ESCROW: The Earnest Money is deposited with Escrow Agent with the
         understanding that Escrow Agent is not a party to this Agreement and
         does not assume or have any liability for performance or
         non-performance of any party.  Before the Escrow Agent has any
         obligation to disburse the Earnest Money in the event of dispute, he
         has the right to require from all signatories a written release of
         liability of the Escrow Agent, written notification of Agreement
         termination and written authorization to disburse the Earnest Money.
         At closing, Earnest Money shall be applied to the Purchase Price.

16.      DUTIES OF BUYER AND SELLER AT CLOSING:

         A.      At the closing, Seller shall deliver to Buyer, at Seller's
         sole cost and expense, the following:

                 (1)      duly executed and acknowledged Corporate Deed
                 conveying good and indefeasible title in fee simple to all of
                 the property, free and clear of any and all liens,
                 encumbrances, conditions, easements, assessments, reservations
                 and restrictions, except as permitted herein, and/or approved
                 by Buyer in writing and execute a Vendor's Affidavit;

                 (2)      A binder for an Owner's Policy of Title Insurance
                 issued by a reputable insurance company chosen by the Seller
                 in the full amount of the Sales Price dated as of closing,
                 insuring Buyer's fee simple title to the property to be good
                 and indefeasible subject only to those title exceptions
                 permitted herein, or as may be approved by Buyer in writing,
                 and the standard printed exceptions contained in the usual
                 form of the Title Policy.

                 (3)      Furnish evidence of its capacity and authority for 
                 the closing of this transaction.

                 (4)      Execute all other necessary documents to close this
                 transaction.

         B.      At the closing, Buyer shall perform the following:

                 (1)      Pay the cash portion of the Sales Price in the form 
                 of a certified or cashier's check;


                                     -4-


<PAGE>   5


                 (2)      Execute the note(s) and mortgage(s) provided for
                 herein and cause the funds to be made available to the closing
                 officer for disbursement;

                 (3)      Furnish evidence of its capacity and authority for 
                 the closing of this transaction;

                 (4)      Furnish to Seller and/or Third Party Lender, at
                 Buyer's expense, a mortgagee's policy issued by Title Company
                 for the benefit of the holder(s) of the mortgage(s) provided
                 for herein;

                 (5)      Execute all other necessary documents to close this
                 transaction.

17.      CONDEMNATION: If prior to Closing Date condemnation proceedings are
         commenced against any portion of the property, Buyer may, at its
         option, terminate this Agreement by written notice to Seller within
         thirty (30) days after Buyer is advised of the commencement of
         condemnation proceedings, or Buyer shall have the right to appear and
         defend in such condemnation proceedings, and any award in condemnation
         shall, at the Buyer's election, become the property of Seller and
         reduce the purchase price by the same amount or shall become the
         property of Buyer and the purchase price not be reduced.

18.      CASUALTY LOSS: Risk of loss by damage or destruction to the Property
         prior to the closing shall be borne by Seller.  In the event any such
         damage or destruction is not fully repaired prior to closing, Buyer,
         at its option, may either terminate this Agreement or elect to close
         the transaction, in which event Seller's right to all insurance
         proceeds resulting from such damage or destruction shall be assigned
         in writing by Seller to Buyer.

19.      RESPONSIBLE PROPERTY TRANSFER LAW: The Seller believes it is not
         required to provide Purchaser with a Disclosure Statement pursuant to
         Indiana's Responsible Party Transfer Law (I.C. Section 13-7-22.5-1 et
         seq.) because (1) the Property does not contain any hazardous chemical
         or material; (2) the Property does not contain any underground storage
         tanks which are or have been utilized to hold petroleum or other
         regulated substances; (3) the Property is not listed on the
         Comprehensive Environmental Response, Compensation and Liability
         Information System; (4) and/or Property is exempt from the provisions
         of said law.  However, if after execution of this Agreement, Seller
         learns that the Property comes within the terms of the Responsible
         Property Transfer Law, then Seller agrees to provide Buyer with the
         required Disclosure Document and comply with all other parts of this
         Law.

20.      ENVIRONMENTAL ASSESSMENT:

         A.      Buyer, or its representative, may, at Buyer's sole cost and
         expense, conduct environmental assessments of the Property as the
         Buyer in its sole discretion may deem appropriate.  In the event such
         assessments are conducts, Buyer agrees to notify Seller


                                     -5-
<PAGE>   6

         immediately of any findings of suspected environmental problems.
         Buyer shall provide Seller with duplicate originals of any reports
         date summaries or test results generated as a result of Buyer's
         investigations, but in no event shall Buyer, or its representatives,
         agents or contractors, provide any such materials to any governmental
         authority or other party or entity prior to closing, unless disclosure
         of such materials is required under Section 20 hereof or any other
         applicable State and/or Federal environmental law.

         B.      Seller shall cooperate fully with Buyer or its representatives
         during any investigation or other activities conducted pursuant to
         this Section 21.

         C.      Seller, at its cost, may correct any and all such deficiencies
         disclosed by said assessment.

         D.      If Seller fails or refuses to correct such deficiencies on or
         before the Closing Date, Buyer may, at its sole option, terminate this
         Agreement.

21.      MISCELLANEOUS

         A.      Any notice required or permitted to be delivered hereunder,
         shall be deemed received when personally delivered or sent by United
         States mail, postage prepaid, certified and return receipt requested,
         addressed to Seller or Buyer, as the case may be, at the address set
         forth below the signature of such party hereto.

         B.      This Agreement shall be construed under and in accordance with
         the laws of the State of Indiana.

         C.      This Agreement shall be binding upon and inure to the benefit
         of the parties hereto and their respective heirs, executors,
         administrators, legal representatives, successors, and permitted
         assigns.  This Agreement may not be assigned by Buyer without written
         consent of the Seller.

         D.      In case any one or more of the provisions contained in this
         Agreement shall for any reason be held to be invalid, illegal, or
         unenforceable in any respect, such invalidity, illegality, or
         unenforceability shall not affect any other provision hereof, and this
         Agreement shall be construed as if such invalid, illegal, or
         unenforceable provision had never been contained herein.

         E.      This Agreement constitutes the sole and only agreement of the
         Parties hereto and supersedes any prior understandings or written or
         oral agreements between the parties respecting the transaction and
         cannot be changed except by their written consent.

         F.      Time is of the essence of this Agreement.


                                     -6-
<PAGE>   7

         G.       Words of any gender used in this Agreement shall be
         held and construed to include any other gender, and words in
         the singular number shall be held to include the plural, and
         vice versa, unless the context requires otherwise.

         H.      All rights, duties and obligations of the signatories hereto
         shall survive the passing of title to, or an interest in, the
         property.

         I.      Buyer shall not record or attempt to record this Agreement.

         J.      Wavier.  Each party hereto may waive any breach by the other
         party of any of the provisions contained in this Agreement or any
         default by such other party in the observance or performance of any
         covenant or condition required to be observed or performed by it
         contained herein; provided, however, that such waiver or waivers shall
         be in writing, shall not be construed as a continuing waiver, and
         shall not extend to or be taken in any manner whatsoever to affect any
         subsequent breach, act or omission or default or affect each party's
         rights resulting therefrom.  No waiver will be implied from any delay
         or failure by either party to take action on account of any default by
         the other party.  No extension of time for performance of any
         obligations or acts shall be deemed an extension of the time for
         performance of any other obligations or acts.

         K.      Further Assurances.  Each party hereto shall do such further
         acts and execute and deliver such further agreements and assurances as
         the other party may reasonably require to give full effect and meaning
         to this Agreement.

         L.      Brokerage Commissions.  Buyer hereby represents and warrants
         to Seller that Buyer has not incurred, and shall not have incurred as
         of the Closing Date, any liability for the payment of any brokerage
         fee or commission in connection with the transaction contemplated in
         this Agreement.  Seller hereby represents and warrants to Buyer that
         Seller has not incurred, and shall not have incurred as of the Closing
         Date, any liability for the payment of any brokerage fee or commission
         in connection with the transaction contemplated in this Agreement,
         except for the commission due to the Shook Agency (for which Seller
         shall be solely responsible).  Seller and Buyer hereby agree to
         defend, indemnify and hold harmless the other from and against any and
         all claims of any other person claiming a brokerage fee or commission
         through such party.

22.      Expiration of Agreement.  This Agreement shall expire unless accepted
         and executed by Buyer and delivered to Seller by 5:00 PM, EST, January
         12, 1996.  If this Agreement is not timely accepted by Seller, it
         shall be null and void and all parties hereto shall stand relieved and
         released of any and all liability or obligations hereunder.

                                     -7-
<PAGE>   8

<TABLE>
<S><C>
EXECUTED by Seller this _______ day of ___________________, 1997.

By:__________________________________    By:_______________________________________

   __________________________________       _______________________________________
              (Printed)                                    (Printed)                   

Seller's Address for Notice Purposes:

                        ACCEPTANCE OF PURCHASE AGREEMENT

EXECUTED by Buyer this _______ day of ___________________, 1997.

By:__________________________________    By:_______________________________________

   __________________________________       _______________________________________
              (Printed)                                    (Printed)


Buyer's Address for Notice Purposes:_______________________________________________
</TABLE>

                                     -8-



<PAGE>   1
                                                                   EXHIBIT 11.1


Exhibit 11--Statement Re:  Computation of Per share Earnings

<TABLE>
<CAPTION>                                                                                                    
                                                                                                          Nine Months Ended     
                                                                      Year Ended September 30                  June 30          
                                                                      -----------------------             -----------------
                                                                  1994          1995          1996         1996         1997     
                                                               --------       -------       -------      -------      -------   
                                                                   (In Thousands, except per share data)      (unaudited)
                                                                         
<S>                                                           <C>            <C>            <C>           <C>          <C>
Primary                                                                                                                         
  Average Common shares outstanding                            2,097            2,159         2,185        2,185         2,212   
  Net effect of dilutive stock options--based
    on the treasury stock method using average
    market price                                                 199              155           152          152           110
  Assumed conversion of preferred shares                         752              752           752          752           752
                                                              ------           ------        ------       ------        ------
  Total                                                        3,048            3,066         3,089        3,089         3,074
                                                              ======           ======        ======       ======        ======
                                                                                                                                
  Net income available to common shareholders                 $  495           $  497        $  346       $  136        $  644
                                                              ======           ======        ======       ======        ======

  Per share amount                                            $ 0.16           $ 0.16        $ 0.11       $  .04        $  .21
                                                              ======           ======        ======       ======        ======

Fully Diluted
  Average Common shares outstanding                            2,097            2,159         2,185        2,185         2,212
  Net effect of dilutive stock options--based
    on the treasury stock method using the 
    period-end market price, if higher than average 
    market price                                                 199              155           152          152           110
  Assumed conversion of preferred shares                         752              752           752          752           752
                                                              ------           ------        ------       ------        ------

  Total                                                        3,048            3,066         3,089        3,089         3,074   
                                                              ======           ======        ======       ======        ======

  Net income available to common shareholders                 $  495           $  497        $  347       $  136        $  644   
                                                              ======           ======        ======       ======        ======

  Per share amount                                            $ 0.16           $ 0.16        $ 0.11       $  .04        $  .21
                                                              ======           ======        ======       ======        ======


</TABLE>






<PAGE>   1
                                                                   EXHIBIT 21.1

                             List of Subsidiaries

                NAME                            JURISDICTION OF ORGANIZATION
                ----                            ----------------------------
1.   BAS Technicol, Ltd                               United Kingdom
2.   IMI Acquisition Corporation                      Indiana

<PAGE>   1
                                                                EXHIBIT 23.2

                       CONSENT OF INDEPENDENT AUDITORS


We consent to the reference to our firm under the captions "Experts" and
"Selected Consolidated Financial Data" and to the use of our report dated
November 8, 1996 (except for Note 10, as to which the date is ________) in the
Registration Statement (Form S-1) and related Prospectus of Bioanalytical
Systems, Inc. for the registration of 1,500,000 of its common shares.





Indianapolis, Indiana


The foregoing consent is in the form that will be signed upon the effective
date of the share split described in Note 10 to the financial statements.


                                                /s/ Ernst & Young LLP



Indianapolis, Indiana
September 25, 1997





<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
BIOANALYTICAL SYSTEMS, INC. CONSOLIDATED FINANCIAL STATEMENTS CONTAINED IN THE
COMPANY'S REGISTRATION STATEMENT ON FORM S-1 AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   9-MOS                   YEAR
<FISCAL-YEAR-END>                          SEP-30-1997             SEP-30-1996
<PERIOD-START>                             OCT-01-1996             OCT-01-1995
<PERIOD-END>                               JUN-30-1997             SEP-30-1996
<CASH>                                             241                     595
<SECURITIES>                                         0                       0
<RECEIVABLES>                                    2,550                   1,652
<ALLOWANCES>                                         0                       0
<INVENTORY>                                      2,088                   1,932
<CURRENT-ASSETS>                                 5,092                   4,382
<PP&E>                                          11,410                   8,812
<DEPRECIATION>                                   2,777                   2,333
<TOTAL-ASSETS>                                  14,423                  11,374
<CURRENT-LIABILITIES>                            1,730                   1,323
<BONDS>                                              0                       0
                                0                     298
                                      1,231                   1,231
<COMMON>                                           498                     484
<OTHER-SE>                                       5,143                   4,472
<TOTAL-LIABILITY-AND-EQUITY>                    14,423                  11,374
<SALES>                                          7,347                   9,113
<TOTAL-REVENUES>                                11,038                  12,794
<CGS>                                            2,268                   3,227
<TOTAL-COSTS>                                    4,425                   5,368
<OTHER-EXPENSES>                                 5,414                   6,725
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                                  69                      81
<INCOME-PRETAX>                                  1,141                     683
<INCOME-TAX>                                       470                     283
<INCOME-CONTINUING>                                671                     400
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                       644                     347
<EPS-PRIMARY>                                      .21                     .11
<EPS-DILUTED>                                      .21                     .11
        

</TABLE>


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