THERMEDICS DETECTION INC
S-1, 1997-07-24
INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL
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      AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JULY 24, 1997
                                                 REGISTRATION NO. 333-
================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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

                                    FORM S-1
             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

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

                            THERMEDICS DETECTION INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

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

        MASSACHUSETTS               3823                      04-3311544
(STATE OR OTHER JURISDICTION   (PRIMARY STANDARD           (I.R.S. EMPLOYER
    OF INCORPORATION OR           INDUSTRIAL               IDENTIFICATION NO.)
       ORGANIZATION)          CLASSIFICATION CODE
                                   NUMBER)

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

                                  220 MILL ROAD
                      CHELMSFORD, MASSACHUSETTS 01824-4178
                                 (508) 251-2000
               (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
        INCLUDING AREA CODE, OF REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)

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

                            SANDRA L. LAMBERT, CLERK
                            THERMEDICS DETECTION INC.
                         c/o Thermo Electron Corporation
                                 81 Wyman Street
                                  P.O. Box 9046
                             Waltham, MA 02254-9046
                                 (617) 622-1000
            (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
                   INCLUDING AREA CODE, OF AGENT FOR SERVICE)

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

                                    COPY TO:

                           SETH H. HOOGASIAN, ESQUIRE
                                 GENERAL COUNSEL
                            THERMEDICS DETECTION INC.
                         c/o Thermo Electron Corporation
                                 81 Wyman Street
                        Waltham, Massachusetts 02254-9046
                                 (617) 622-1000

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

    APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:  As soon as
practicable after the Registration Statement has become 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. [x]

    If this form is filed to  register  additional  securities  for an  offering
pursuant to Rule 462(b) under the  Securities  Act of 1933,  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 of  1933,  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, check the following box.  [ ]

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


                         CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
======================================================================================================================
  TITLE OF EACH CLASS             AMOUNT              PROPOSED MAXIMUM         PROPOSED MAXIMUM             AMOUNT OF
OF SECURITIES TO BE                TO BE               OFFERING PRICE              AGGREGATE              REGISTRATION
      REGISTERED                REGISTERED              PER SHARE(1)         OFFERING PRICE(1)               FEE
      ----------                ----------              -------------         ------------------               ---
<S>                               <C>                      <C>                    <C>                        <C>
Common Stock, $.10 par
value per share                   643,500                  $11.72                 $7,541,820                 $2,286
======================================================================================================================
</TABLE>
(1) Calculated pursuant to Rule 457(c).

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


    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.
================================================================================

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 JULY 24, 1997

PROSPECTUS

                              643,500 SHARES

                                  [LOGO]
                               COMMON STOCK

    This  Prospectus  relates to the resale of 643,500  shares (the "Shares") of
Common  Stock,  par value $.10 per share (the  "Common  Stock"),  of  Thermedics
Detection  Inc.  (the  "Company")  by certain  shareholders  of the Company (the
"Selling  Shareholders").  The  Shares  may be  offered  from  time  to  time in
transactions on the American Stock Exchange, in negotiated transactions, through
the writing of options on the Shares,  or a combination of such methods of sale,
at fixed prices that may be changed,  at market prices prevailing at the time of
sale,  at prices  related  to such  prevailing  market  prices or at  negotiated
prices.  Such  transactions  may be  effected  by the sale of the  Shares  to or
through broker-dealers,  and such broker-dealers may receive compensation in the
form of  discounts,  concessions  or  commissions  from the  sellers  and/or the
purchasers  of the  Shares for whom such  broker-dealers  may act as agent or to
whom  they  sell as  principal,  or both  (which  compensation  to a  particular
broker-dealer  might  be  in  excess  of  customary  commissions).  The  Selling
Shareholders  and any  broker-dealer  who  acts in  connection  with the sale of
Shares hereunder may be deemed to be  "underwriters"  as that term is defined in
the  Securities  Act of  1933,  as  amended  (the  "Securities  Act"),  and  any
commission  received by them and profit on any resale of the Shares as principal
might  be  deemed  to  be  underwriting  discounts  and  commissions  under  the
Securities  Act.  The  Shares  were  originally  sold by the  Company in private
placements  pursuant to certain Stock Purchase Agreements with the Company dated
March 26, 1996 and November 19, 1996 (the "Purchase  Agreements").  See "Selling
Shareholders."

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


    THE SHARES OF COMMON STOCK OFFERED HEREBY INVOLVE A HIGH DEGREE OF RISK.
                     SEE "RISK FACTORS" BEGINNING ON PAGE 3.

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


    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.

    None of the proceeds from the sale of the Shares by the Selling Shareholders
will be received  by the  Company.  The Company has agreed to bear all  expenses
(other  than  underwriting  discounts  and  selling  commissions,  and  fees and
expenses of counsel or other advisors to the Selling Shareholders) in connection
with the  registration  and sale of the  Shares  being  registered  hereby.  The
Company  has  agreed to  indemnify  the  Selling  Shareholders  against  certain
liabilities,  including  liabilities  under the Securities Act as underwriter or
otherwise.

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

    The   Company   is  a   majority-owned   subsidiary   of   Thermedics   Inc.
("Thermedics"),   which  is  a  majority-owned  subsidiary  of  Thermo  Electron
Corporation  ("Thermo  Electron").  The Common  Stock is traded on the  American
Stock  Exchange under the symbol "TDX".  On July 23, 1997, the reported  closing
price of the Common  Stock on the American  Stock  Exchange  was  $11-13/16  per
share.

               , 1997







                                  THE COMPANY

    Thermedics Detection Inc. (the "Company") develops, manufactures and markets
high-speed  on-line  detection  and  measurement  systems  used in a variety  of
industrial process  applications,  explosives detection and laboratory analysis.
The Company  operated as a division of Thermedics  until its  incorporation as a
Massachusetts  corporation  in December  1990. In connection  with the Company's
incorporation,  Thermedics  transferred  to the  Company  its TEA  Analyzer  and
certain other trace detection  technologies in exchange for 10,000,000 shares of
the Company's Common Stock. In January 1996, the Company acquired  substantially
all of the assets of Moisture Systems  Corporation and the stock of Rutter & Co.
B.V. (collectively,  "Moisture Systems"). Unless the context otherwise requires,
references in this Prospectus to the Company or Thermedics  Detection Inc. refer
to Thermedics  Detection Inc. and its subsidiaries and predecessors.  As of June
28, 1997,  Thermedics  beneficially owned 74.8% of the outstanding Common Stock.
The  Company's  principal  executive  offices  are  located  at 220  Mill  Road,
Chelmsford,   Massachusetts  01824-4178,  and  its  telephone  number  is  (508)
251-2000.

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


    Alexus, EGIS and TEA Analyzer are each registered trademarks,  and Flash-GC,
InScan,  Micro-Quad,  Quadra-Beam,  Rampart and  SecurScan  are  trademarks,  of
Thermedics  Detection  Inc. All other  trademarks or trade names  referred to in
this Prospectus are the property of their respective
owners.


                                       2





                                  RISK FACTORS

    In addition to the other  information in this  Prospectus,  investors should
carefully  consider the following risk factors when  evaluating an investment in
the Common  Stock  offered  hereby.  This  Prospectus  contains  forward-looking
statements  that involve  risks and  uncertainties,  such as  statements  of the
Company's  plans,  objectives,   expectations  and  intentions.  The  cautionary
statements  made in this  Prospectus  should be read as being  applicable to all
forward-looking   statements  wherever  they  appear  in  this  Prospectus.  The
Company's  actual results could differ  materially from those discussed  herein.
Factors  that  could  cause or  contribute  to such  differences  include  those
discussed below, as well as those discussed elsewhere in this Prospectus.

    Uncertainty of Market  Acceptance of New Products.  Certain of the Company's
products represent alternatives to traditional detection and analytical methods.
As a result,  such products may be slow to achieve,  or may not achieve,  market
acceptance,  as customers  may seek further  validation  of the  efficiency  and
efficacy of the  Company's  technology,  particularly  where the purchase of the
product requires a significant capital commitment. The Company believes that, to
a  significant  extent,  its  growth  prospects  depend on its  ability  to gain
acceptance  of  the  efficiency   and  efficacy  of  the  Company's   innovative
technologies by a broader group of customers.  The Company is currently devoting
significant  resources  toward the enhancement of its existing  products and the
development of new products and technologies,  including the Company's  Flash-GC
high-speed  gas  chromatography  system;  a more  portable  EGIS;  SecurScan,  a
walk-through  explosives-detection  system;  and Rampart, a lower-cost EGIS unit
for use in airport screening of carry-on baggage. There can be no assurance that
the Company will be  successful in obtaining  such broad  acceptance or that, if
obtained,  such  acceptance  will be  sustained.  The  failure of the Company to
obtain and sustain such broad acceptance could have a material adverse effect on
the Company's business, financial condition and results of operations.

    Ongoing Product Development Efforts Required by Rapid Technological  Change.
The markets for the Company's products are characterized by changing technology,
evolving industry standards and new product introductions.  The Company's future
success  will depend in part upon its ability to enhance its  existing  products
and to develop and  introduce  new products and  technologies  to meet  changing
customer  requirements.  There  can  be  no  assurance  that  the  Company  will
successfully  complete the  enhancement  and  development of these products in a
timely fashion or that the Company's current or future products will satisfy the
needs of its markets.

    Dependence  of Explosives  Detection  Market on  Government  Regulation  and
Airline Industry.  The Company's sales of its  explosives-detection  systems for
use in airports  has been and will  continue  to be  dependent  on  governmental
initiatives to require, or support,  the screening of checked luggage,  carry-on
items and personnel with advanced explosives-detection equipment.  Substantially
all of such systems have been installed at airports in countries  other than the
United  States,  in which the  applicable  government  or  regulatory  authority
overseeing  the  operations  of the airport has mandated  such  screening.  Such
mandates are  influenced by many factors  outside of the control of the Company,
including  political  and  budgetary  concerns  of  governments,   airlines  and
airports. Of the more than 600 commercial airports worldwide,  more than 400 are
located in the United States. Accordingly, the Company believes that the size of
the market for  explosives-detection  equipment  is, and will  increasingly  be,
significantly  influenced by United States government regulation.  In the United
States,  the  Aviation  Security  Act of  1990  directed  the  Federal  Aviation
Administration  ("FAA") to develop a standard for  explosives-detection  systems
and  required  airports  in the United  States to deploy  systems  meeting  this
standard in 1993.  The standard  adopted by the FAA is more  comprehensive  than
standards  adopted in most other countries.  To date, no system has demonstrated
that it meets the FAA standard under realistic airport operating conditions.  As
a  result,   the  FAA  has  not   mandated   the   installation   of   automated
explosives-detection  systems,  and only a limited  number of these systems have
been deployed,  primarily on a test basis,  in the United States.  The FAA first
certified a computed  X-ray  tomography  system for checked  luggage in December
1994.  However,  the FAA has  recognized  that this system must undergo  further
testing to resolve  whether it can operate  under  realistic  airport  operating
conditions.  The  Company's  systems  are  trace  detectors  for  which  no  FAA
certification process for checked baggage, carry-on or personal screening exists
to date. In 1992, the FAA approved the Company's EGIS system for use by airlines
in screening carry-on  electronic items and luggage searches. 


                                       3





Each airline must seek this approval for each application.  Although the FAA has
provided  significant  funding to the Company in connection with the development
of its  explosives-detection  technology,  there can be no assurance that any of
the  Company's   systems  will  ever  meet  this  or  any  other  United  States
certification   standard.   Any  product   utilizing  a  technology   ultimately
recommended or required by the FAA will have a significant competitive advantage
in the market for explosives-detection devices. Unless the FAA takes action with
respect to a particular  explosives-detection  product or  technology,  airlines
will not be required to upgrade existing metal detection equipment.  Earnings of
U.S.  air  carriers  tends to  fluctuate  significantly  from time to time.  Any
depression  in the financial  condition of such carriers  would likely result in
lower  capital  spending  for  discretionary  items.  Moreover,  there can be no
assurance that additional countries will mandate the implementation of effective
explosives screening for airline baggage,  carry-on items or personnel, or that,
if  mandated,  the  Company's  systems  will  meet  the  certification  or other
requirements  of the  applicable  government  authority.  Even if the  Company's
systems were to meet the applicable requirements, there can be no assurance that
the Company  would be able to market its systems  effectively.  See "Business --
Explosives Detectors" and "-- Government Regulation."

    In October 1996,  the United States  enacted  legislation  which  includes a
$144.2  million  allocation to purchase  explosives-detection  systems and other
advanced  security  equipment,  including trace detection  equipment such as the
systems manufactured by the Company, for carry-on and checked baggage screening.
There can be no assurance that this  legislation  will not be modified to reduce
the funding for advanced explosives equipment, that the necessary appropriations
will be made to fund the  purchases of advanced  explosives-detection  equipment
contemplated  by the  legislation,  that  trace-detection  equipment such as the
systems  manufactured  by the Company  will be mandated,  or that,  even if such
appropriation  is made and such  equipment  is  mandated,  any of the  Company's
explosives-detection  systems will be purchased for installation at any airports
in the United  States.  Further,  there can be no assurance  that the U.S.  will
mandate the  widespread  use of these  systems  after  completion of the initial
purchases.

    Significance of Certain Customers. Sales of process detection instruments to
bottlers  licensed  by  The  Coca-Cola  Company   ("Coca-Cola   Bottlers")  were
$32,184,000, $9,974,000 and $10,641,000 in 1994, 1995 and 1996, respectively, or
64%, 36% and 24% of the Company's revenues,  respectively,  during such periods.
Sales to Coca-Cola Bottlers have decreased as these customers have substantially
completed  full  deployment  of the Company's  Alexus  system in existing  plant
locations.  Although  the Company  anticipates  that it will  continue to derive
revenues  from the sale of upgrades  and new  systems to new plants,  as well as
services to the  Coca-Cola  Bottlers,  the Company does not expect that revenues
derived from these  customers will continue at a rate comparable to prior years.
While the  Company  believes  that the  introduction  of new  process  detection
products for the food,  beverage and other  markets will  continue to reduce the
significance of the Coca-Cola  Bottlers to the Company's  results of operations,
there  can  be  no  assurance  that  the  Company  will  be  successful  in  the
introduction  of new  process  detection  products  or that  any  sales of these
products  will be  sufficient  to maintain a rate of growth  equivalent to prior
years.

    Competition;  Technological  Change. The Company encounters,  and expects to
continue  to  encounter,  competition  in the  sale of its  current  and  future
products.  Many of the  Company's  competitors  and potential  competitors  have
substantially  greater  resources,  manufacturing  and  marketing  capabilities,
research  and  development  staff and  production  facilities  than those of the
Company.  Some of these  competitors  have  large  existing  installed  bases of
products  with  substantial  numbers of  customers.  In  addition,  other  major
corporations  have recently  announced  their  intention to enter certain of the
Company's markets, including the security screening market. The Company believes
that  many of its  products  are  successful  because  they are  technologically
superior to alternative  products offered by some of the Company's  competitors.
In order to continue to be  successful,  the  Company  believes  that it will be
important to maintain this  technological  advantage.  No assurance can be given
that the Company will be able to maintain such an advantage or that  competitors
of the  Company  will not  develop  technological  innovations  that will render
products  of the  Company  obsolete.  For  example,  the  Company's  EGIS system
competes  against other trace  explosives  detection  systems as well as systems
utilizing dual energy X-ray or computed X-ray tomography  imaging  technologies.
There can be no  assurance  that such  technologies  will not be  enhanced  to a
degree  that  would  impair  the  Company's  ability  to market  its  explosives
detection systems. See "Business -- Competition."


                                       4





    Potential for Product Liability Claims.  The Company's business involves the
risk of product liability claims inherent to the explosives  detection business,
as well as the food,  beverage  and  other  industries.  There are many  factors
beyond  the  control of the  Company  that  could  result in the  failure of the
Company's  products to detect  explosives  or  contaminants  in food or beverage
containers,  such as the  reliability  of a  customer's  operators,  the ongoing
training of such operators and the maintenance of the Company's  products by its
customers.  For these  and other  reasons,  there can be no  assurance  that the
Company's  products will detect all explosives or  contaminants.  The failure to
detect  explosives or contaminants  could give rise to product  liability claims
and result in negative  publicity  that could have a material  adverse effect on
the  Company's  business,  financial  condition and results of  operations.  The
Company  currently   maintains  both  aviation  and  general  product  liability
insurance in amounts the Company believes to be commercially  reasonable.  There
can be no  assurance  that this  insurance  will be  sufficient  to protect  the
Company from product liability claims, or that product liability  insurance will
continue to be available to the Company at a reasonable cost, if at all.

    Uncertainties  Associated With International  Operations.  In 1994, 1995 and
1996,  international sales accounted for 85%, 73% and 67%, respectively,  of the
Company's  revenues,  and the Company  anticipates that international sales will
continue to account for a  significant  percentage  of the  Company's  revenues.
Sales to customers in The  Netherlands  accounted for  approximately  17% of the
Company's  revenues in 1996.  See Note 8 of Notes to the Company's  Consolidated
Financial  Statements.  International  revenues  are  subject  to  a  number  of
uncertainties,  including the following:  agreements may be difficult to enforce
and receivables  difficult to collect through a foreign  country's legal system;
foreign  customers may have longer payment cycles;  foreign countries may impose
additional  withholding  taxes or otherwise  tax the Company's  foreign  income,
impose tariffs or adopt other  restrictions  on foreign trade;  fluctuations  in
exchange rates may affect product demand and adversely affect the  profitability
in U.S.  dollars of  products  and  services  provided by the Company in foreign
markets  where  payment for the  Company's  products and services is made in the
local  currency;  U.S.  export  licenses  may be  difficult  to obtain;  and the
protection of intellectual  property in foreign  countries may be more difficult
to enforce.  Moreover, many foreign countries have their own regulatory approval
requirements  for sales of the Company's  products.  As a result,  the Company's
introduction  of new  products  into  international  markets  can be costly  and
time-consuming,  and there can be no assurance  that the Company will be able to
obtain the required regulatory approvals on a timely basis, if at all. There can
be no  assurance  that any of these  factors  will not have a  material  adverse
effect on the Company's business, financial condition and results of operations.
The Company  does not  attempt to  minimize  currency  and  exchange  rate risks
through material hedging activities.

    Limited  Protection  of  Proprietary  Technology  and  Risks of  Third-Party
Claims.  Proprietary rights relating to the Company's products will be protected
from  unauthorized use by third parties only to the extent that they are covered
by valid and  enforceable  patents  or are  maintained  in  confidence  as trade
secrets.  The Company owns numerous  United  States and foreign  patents and has
filed  applications  for  additional  patents.  In addition,  the Company has an
exclusive,  perpetual,  royalty-free  license under certain patents covering the
use of near-infrared and very near-infrared emitting diodes for on-line spectral
measurements.  There  can be no  assurance,  however,  that any  patents  now or
hereafter owned by the Company will afford protection against competitors, or as
to the  likelihood  that patents will issue from  pending  patent  applications.
Proceedings  initiated  by the Company to protect its  proprietary  rights could
result in substantial  costs to the Company.  Although the Company believes that
its products and technology do not infringe any existing  proprietary  rights of
others, there can be no assurance that third parties will not assert such claims
against  the  Company  in the  future or that  such  future  claims  will not be
successful.   The  Company  could  incur  substantial  costs  and  diversion  of
management  resources  with  respect to the  defense of any claims  relating  to
proprietary rights,  which could have a material adverse effect on the Company's
business,  financial condition and results of operations.  Furthermore,  parties
making such claims could secure a judgment awarding substantial damages, as well
as injunctive  or other  equitable  relief,  which could  effectively  block the
Company's  ability to make,  use,  sell,  distribute  or market its products and
services in the U.S. or abroad.  Such a judgment  could have a material  adverse
effect on the Company's business, financial condition and results of operations.
In the event that a claim relating to  proprietary  technology or information is
asserted against the Company, the


                                       5





Company  may  seek  licenses  to such  intellectual  property.  There  can be no
assurance,  however,  that  such a license  could be  obtained  on  commercially
reasonable  terms, if at all, or that the terms of any offered  licenses will be
acceptable to the Company. The failure to obtain the necessary licenses or other
rights could  preclude the sale,  manufacture or  distribution  of the Company's
products and,  therefore,  could have a material adverse effect on the Company's
business,  financial condition and results of operations. The cost of responding
to any such claim may be material, whether or not the assertion of such claim is
valid.  There can be no assurance that the steps taken by the Company to protect
its  proprietary  rights  will be adequate  to prevent  misappropriation  of its
technology  or  independent  development  by others of  similar  technology.  In
addition,   the  laws  of  some  jurisdictions  do  not  protect  the  Company's
proprietary  rights to the same  extent as the laws of the U.S.  There can be no
assurance that these protections will be adequate. See "Business -- Intellectual
Property."

    Risks Associated with Acquisition Strategy.  The Company's strategy includes
the  acquisition of businesses and  technologies  that complement or augment the
Company's  existing  product  lines.  For  example,  in January 1996 the Company
acquired Moisture Systems.  Promising acquisitions are difficult to identify and
complete for a number of reasons, including competition among prospective buyers
and the  need for  regulatory  approvals,  including  antitrust  approvals.  Any
acquisitions  completed by the Company may be made at substantial  premiums over
the fair  value of the net  assets of the  acquired  companies.  There can be no
assurance that the Company will be able to complete future  acquisitions or that
the Company will be able to successfully  integrate any acquired businesses.  In
order to finance such acquisitions, it may be necessary for the Company to raise
additional  funds  through  public or  private  financings.  Any  equity or debt
financing,  if available at all, may be on terms which are not  favorable to the
Company  and,  in the case of equity  financing,  may result in  dilution to the
Company's stockholders.

    Difficulties  in Managing  Rapid  Growth.  Due to the level of technical and
marketing  expertise  necessary to support its existing and new  customers,  the
Company must attract and retain  highly  qualified and  well-trained  personnel.
There are a limited  number of  persons  with the  requisite  skills to serve in
these  positions,  and it may become  increasingly  difficult for the Company to
hire such personnel.  Further rapid expansion may also significantly  strain the
Company's  administrative,   operational  and  financial  personnel,  management
information systems,  manufacturing operations and other resources. There can be
no  assurance  that the  Company's  systems,  procedures  and  controls  will be
adequate to support the Company's operations.  Failure to manage growth properly
could  have a  material  adverse  effect on the  Company's  business,  financial
condition  and  results  of  operations.  See "Use of  Proceeds,"  "Management's
Discussion and Analysis of Financial  Condition and Results of  Operations"  and
"Management."

    Potential  Fluctuations  in Quarterly  Performance.  Significant  annual and
quarterly  fluctuations in the Company's results of operations may be caused by,
among other  factors,  the overall  demand for,  and market  acceptance  of, the
Company's  products;  the  timing of  regulatory  approvals  for  certain of the
Company's  products,  government  initiatives  to promote the use of  explosives
detection systems such as those manufactured and sold by the Company; the timing
of the  announcement,  introduction  and  delivery of new  products  and product
enhancements  by the Company and its  competitors;  variations  in the Company's
product mix and  component  costs;  timing of customer  orders;  adjustments  of
delivery  schedules to  accommodate  customers  programs;  the  availability  of
components from suppliers;  the timing and level of expenditures in anticipation
of future sales; the mix of products sold by the Company;  and pricing and other
competitive  conditions.  Because  certain  of the  Company's  products  require
significant  capital  expenditures and other  commitments by its customers,  the
Company has experienced  extended sales cycles.  Delays in anticipated  purchase
orders could have a material adverse effect on the Company's business, financial
condition  and results of  operations.  Customers  may also cancel or reschedule
shipments, and product difficulties could delay shipments. Because the Company's
operating expenses are based on anticipated revenue levels and a high percentage
of the Company's expenses are fixed for the short term, a small variation in the
timing of recognition of revenue can cause  significant  variations in operating
results  from quarter to quarter.  There can be no  assurance  that any of these
factors will not have a material  adverse  impact on the Company's  business and
results of operations.  See  "Management's  Discussion and Analysis of Financial
Condition and Results of Operations" and "Business."


                                       6







    Dependence on Key Personnel.  The Company is highly dependent on the members
of its senior management,  including Messrs.  John Wood,  Jeffrey Langan,  David
Fine, John Hatsopoulos and Paul Kelleher. Messrs. Wood, Hatsopoulos and Kelleher
are full-time employees of Thermo Electron or Thermedics,  but these individuals
devote such  portions of their time to the  Company's  affairs as the  Company's
needs reasonably  require from time to time. While the amount of time devoted to
the affairs of the Company by these individuals may vary substantially from time
to time, the Company generally expects that Mr. Wood will devote from 10% to 20%
of his time, and that Messrs.  Hatsopoulos and Kelleher will devote less than 5%
of their time,  respectively,  to the affairs of the Company.  See "Management."
The loss of one or more of  these  individuals  could  have a  material  adverse
effect on the Company. In addition, the Company believes that its future success
will  depend in part on  whether it can  attract  and  retain  highly  qualified
engineering,   management,   manufacturing,   marketing  and  sales   personnel,
particularly as the Company expands its business  activities.  The Company faces
significant competition for the services of such personnel from other companies.
There can be no  assurance  that the Company will be able to continue to attract
and retain the personnel it requires for continued  growth.  The failure to hire
and retain such personnel could  materially  adversely  affect the Company.  See
"Management."

    Lack of Voting Control; Control by Thermedics. The Company's stockholders do
not have the right to cumulate  votes for the election of directors.  Thermedics
beneficially  owns   approximately   74.8%  of  the  outstanding  Common  Stock.
Accordingly,  Thermedics has the power to elect the entire Board of Directors of
the Company and to approve or disapprove  any corporate  actions  submitted to a
vote of the Company's  stockholders.  See "Relationship with Thermo Electron and
Thermedics"   and  "Security   Ownership  of  Certain   Beneficial   Owners  and
Management."

    Potential  Conflicts  of  Interest.  The Company may be subject to potential
conflicts  of interest  from time to time as a result of its  relationship  with
Thermo  Electron and  Thermedics.  See  "Relationship  with Thermo  Electron and
Thermedics" and "Transactions with Affiliates."  Certain officers of the Company
are also officers of Thermedics,  Thermo Electron  and/or other  subsidiaries of
Thermo Electron,  and are full-time  employees of Thermedics or Thermo Electron.
Such officers  devote only a portion of their working time to the affairs of the
Company.  For financial reporting purposes,  the Company's financial results are
included in the  consolidated  financial  statements  of  Thermedics  and Thermo
Electron.  The  members of the Board of  Directors  of the  Company who are also
affiliated  with  Thermo  Electron  or  Thermedics  will  consider  not only the
short-term and the long-term impact of operating  decisions on the Company,  but
also the  impact of such  decisions  on the  consolidated  financial  results of
Thermedics and Thermo  Electron.  In some instances the impact of such decisions
could be  disadvantageous  to the Company  while  advantageous  to Thermedics or
Thermo  Electron,  or vice versa.  The Company is a party to various  agreements
with Thermo  Electron that may limit the Company's  operating  flexibility.  See
"Relationship  with Thermo  Electron  and  Thermedics"  and  "Transactions  with
Affiliates."

    Significant  Additional  Shares  Eligible for Sale After the  Offering.  The
9,992,400  shares of Common  Stock owned by  Thermedics  are eligible for resale
under Rule 144. In  addition,  subject to certain  limitations  described  below
under "Shares  Eligible for Future Sale," as long as Thermedics is able to elect
a majority  of the  Company's  Board of  Directors,  it will have the ability to
cause the  Company  at any time to  register  for resale all or a portion of the
Common Stock owned by  Thermedics.  Additional  shares of Common Stock  issuable
upon exercise of options  granted under the Company's  stock-based  compensation
plans will become  available  for future sale in the public market at prescribed
times.  Sales of a  significant  number of shares of Common  Stock in the public
market  following this offering could  adversely  affect the market price of the
Common Stock. See "Relationship with Thermo Electron and Thermedics" and "Shares
Eligible for Future Sale."

    Lack of Dividends.  The Company  anticipates that for the foreseeable future
the  Company's  earnings,  if any,  will be retained for use in the business and
that  no  cash  dividends  will be paid  on the  Common  Stock.  Declaration  of
dividends  on the Common  Stock will depend  upon,  among other  things,  future
earnings,  the  operating and  financial  condition of the Company,  its capital
requirements and general business conditions. See "Dividend Policy."


                                       7





                        PRICE RANGE OF COMMON STOCK

    The Company's  Common Stock has been publicly  traded on the American  Stock
Exchange on a  "when-issued"  basis since  February 24, 1997 and has been traded
"regular  way" since March 26, 1997.  The  following  table sets forth,  for the
periods  indicated,  the high and low sales  prices for the Common  Stock on the
American Stock Exchange.


<TABLE>
<CAPTION>
 FISCAL 1997                                                     HIGH       LOW
 -----------                                                     ----       ---
<S>                                                            <C>        <C>
First Quarter (February 24, 1997 through March 29, 1997)      $12   1/4  $10 5/8
Second Quarter                                                $13   1/4  $ 9 3/4
Third Quarter (through July 23, 1997)                         $11 15/16  $10 1/2
</TABLE>

    As of July 23, 1997, there were 358 holders of record of Common Stock.  This
figure does not reflect beneficial ownership of shares held in street or nominee
name.

                              DIVIDEND POLICY

    The  Company  has never paid any cash  dividends  on the Common  Stock.  The
Company anticipates that for the foreseeable future the Company's  earnings,  if
any, will be retained for use in the business and that no cash dividends will be
paid on the Common Stock.


                                       8







                 SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)


<TABLE>
<CAPTION>
                                                            1997
                                                            ----
                                                            FIRST
                                                            -----
<S>                                                        <C>        
Revenues                                                   $12,429
Gross Profit                                                 6,333
Net Income                                                   1,024
Earnings per Share                                             .09
                                                                             1996
                                                          -----------------------------------------
                                                          FIRST (1)   SECOND     THIRD      FOURTH
                                                          ----------   ------     -----      ------
Revenues                                                   $9,345     $10,104    $11,117   $13,184
Gross Profit                                                4,620       3,981      5,881     7,118
Net Income (Loss)                                            (524)     (1,244)       705     1,425
Earnings (Loss) per Share                                    (.05)       (.12)       .07       .14

                                                                             1995
                                                           ----------------------------------------
                                                            FIRST      SECOND     THIRD      FOURTH
                                                            -----      ------     -----      ------
Revenues                                                   $9,050     $ 7,140    $ 5,998   $ 5,766
Gross Profit                                                4,660       3,274      2,275     2,509
Net Income (Loss)                                           1,202         426        (35)      (85)
Earnings (Loss) per Share                                     .12         .04      --         (.01)

</TABLE>

(1) Includes the results of Moisture Systems and Rutter since their acquisition
     by the Company on January 25, 1996.


                                       9







                                 CAPITALIZATION



    The following table sets forth the capitalization of the Company as of March
29, 1997.


<TABLE>
<CAPTION>
                                                                                        MARCH 29, 1997
                                                                                        --------------
                                                                                        (IN THOUSANDS,
                                                                                     EXCEPT SHARE AMOUNTS)
 <S>                                                                                        <C>
 Short-term Obligation:
    Promissory Note to Parent Company                                                       $21,200
                                                                                            =======
 Shareholders' Investment:
    Common stock, $.10 par value, 50,000,000 shares authorized; 13,354,792 shares
      issued and outstanding (1)                                                            $ 1,335
    Capital in excess of par value                                                           40,984
    Retained earnings                                                                         8,160
    Cumulative translation adjustment                                                        (1,039)
                                                                                            -------
        Total Shareholders' Investment                                                      $49,440
                                                                                            =======
</TABLE>

(1)  Does not include 358,333 shares of Common Stock reserved for issuance under
     the Company's stock-based  compensation plans as of March 29, 1997. Options
     to  purchase  216,849  shares of Common  Stock  had been  granted  and were
     outstanding under the Company's stock-based  compensation plans as of March
     29,  1997.  See   "Management  --   Compensation   of  Directors"  and  "--
     Compensation  of Executive  Officers"  and Note 3 of Notes to the Company's
     Consolidated Financial Statements.


                                       10





                         SELECTED FINANCIAL INFORMATION

    The  selected  financial  information  below as of and for the fiscal  years
ended  December  31,  1994,  December  30, 1995 and  December  28, 1996 has been
derived from the Company's  Consolidated  Financial Statements,  which have been
audited by Arthur Andersen LLP, independent public accountants,  as indicated in
their report included  elsewhere in this Prospectus.  This information should be
read in conjunction  with the Company's  Consolidated  Financial  Statements and
related notes  included  elsewhere in this  Prospectus.  The selected  financial
information  for the fiscal year ended January 1, 1994 has been derived from the
Company's Consolidated  Financial Statements,  which have been audited by Arthur
Andersen  LLP,  but have not been  included  in this  Prospectus.  The  selected
financial  information  for the  fiscal  year  ended  January  2, 1993 and as of
January 1, 1994 and the three month  periods  ended March 30, 1996 and March 29,
1997 has not been  audited  but, in the  opinion of the  Company,  includes  all
adjustments  (consisting  only of normal,  recurring  adjustments)  necessary to
present fairly such information in accordance with generally accepted accounting
principles  applied on a consistent  basis.  The results of  operations  for the
three months ended March 29, 1997 are not necessarily  indicative of results for
the entire year.

<TABLE>
<CAPTION>
                                                            FISCAL YEAR                        THREE MONTHS ENDED      PRO FORMA
                                          ------------------------------------------------    --------------------    COMBINED (2)
                                                                                               MARCH 30,   MARCH 29,  FISCAL YEAR
                                           1992      1993      1994      1995     1996 (1)     1996        1997          1996
                                           ----      ----      ----      ----     ---------     ----        ----          ----
                                                             (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
STATEMENT OF INCOME DATA:
<S>                                      <C>       <C>       <C>        <C>       <C>          <C>        <C>           <C>
Revenues                                 $17,361   $42,031   $50,343    $27,954    $43,750     $ 9,345     $12,429      $45,297
                                         -------   -------   -------    -------    -------     -------     -------      -------   
Costs and Operating Expenses:
   Cost of Revenues                        9,329    23,759    24,906     15,236     22,150       5,182       6,096       22,793
   Selling, General and Administrative
     Expenses                              4,229     7,526    11,973      7,487     15,525       3,558       3,449       16,233
   Research and Development
     Expenses                                647     1,790     3,895      2,741      4,608       1,176       1,071        4,608
                                         -------   -------   -------    -------    -------     -------     -------      -------   
                                          14,205    33,075    40,774     25,464     42,283       9,916      10,616       43,634
                                         -------   -------   -------    -------    -------     -------     -------      -------   
Operating Income (Loss)                    3,156     8,956     9,569      2,490      1,467        (571)      1,813        1,663
Interest and Other Expense, Net            --        --        --           (72)      (878)       (266)       (107)        (934)
                                         -------   -------   -------    -------    -------     -------     -------      -------   
Income (Loss) Before for Income Taxes      3,156     8,956     9,569      2,418        589        (837)      1,706          729
Income Tax (Provision) Benefit            (1,253)   (3,153)   (3,189)      (910)      (227)        313        (682)        (291)
                                         -------   -------   -------    -------    -------     -------     -------      -------   
Net Income (Loss)                        $ 1,903   $ 5,803   $ 6,380     $ 1,508   $   362      $ (524)     $ 1,024     $   438
                                         =======   =======   =======    =======    =======      ======      =======     =======
Earnings (Loss) per Share (3)           $    .19  $   .58    $   .63    $   .15    $   .04      $ (.05)     $   .09     $   .04
                                         =======   =======   =======    =======    =======     =======      =======     =======
Weighted Average Shares (3)               10,069    10,069    10,069     10,069     10,320      10,099       10,976      10,320
                                         =======   =======   =======    =======    =======      ======      =======     =======

BALANCE SHEET DATA (AT END OF PERIOD):
Working Capital                          $ 5,593   $   447   $ 6,116    $11,273    $23,358                  $31,429
Total Assets                              12,126    25,544    17,793     20,322     53,483                   85,412
Long-term Obligations                      --        --         --         --       21,200                    --
Shareholders' Investment                   7,282     3,822     9,208     13,773     20,910                   49,440

</TABLE>

(1)  Includes the results of Moisture Systems and Rutter since their acquisition
     by the Company on January 25, 1996.

(2)  The pro forma  combined  statement  of income data was derived from the pro
     forma combined  condensed  statement of income  included  elsewhere in this
     Prospectus.  The pro forma combined statement of income data sets forth the
     results of operations for fiscal 1996, as if the  acquisitions  of Moisture
     Systems and Rutter had occurred on January 1, 1996.

(3)  Pursuant to Securities and Exchange Commission  requirements,  earnings per
     share have been presented for all periods.  Weighted average shares for all
     periods include  10,000,000  shares issued to Thermedics in connection with
     the  initial  capitalization  of the  Company,  the  effect of shares  sold
     through  private  placements,  as well  as the  incremental  effect  of the
     assumed  issuance of the shares in the private  placements  and the assumed
     exercise of stock  options  issued  within one year prior to the  Company's
     initial public  offering with exercise  prices less than the initial public
     offering price.


                                       11







                      MANAGEMENT'S DISCUSSION AND ANALYSIS
             OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

OVERVIEW

    Thermedics Detection Inc. (the "Company") develops, manufactures and markets
high-speed  on-line  detection  and  measurement  systems  used in a variety  of
industrial process  applications,  explosives detection and laboratory analysis.
The Company's  industrial  process  systems use ultratrace  chemical  detectors,
high-speed gas  chromatography,  X-ray imaging,  near-infrared  spectroscopy and
other  technologies for quality  assurance of in-process and finished  products,
primarily in the food, beverage,  pharmaceutical,  forest products, chemical and
other consumer products industries. The Company's explosives-detection equipment
uses simultaneous  trace particle- and  vapor-detection  techniques based on its
proprietary  chemiluminescence  and high-speed gas chromatography  technologies.
Customers use the Company's explosives-detection equipment to detect plastic and
other  explosives  at airports  and border  crossings,  for other  high-security
screening applications and for forensics and search applications.

    Historically,  the Company's  principal product lines were process detection
systems,  including Alexus systems, and EGIS explosives  detectors.  The Company
expanded its product lines to include moisture  analysis  equipment  through its
acquisition of Moisture  Systems and Rutter in January 1996, and also introduced
its InScan systems and Flash-GC gas chromatography  systems in 1996. The Company
also performs  contract  research and  development  services for  government and
industry customers and generates service revenues through long-term contracts.

    The  Company's  strategy  has  been  to  develop   proprietary,   high-speed
analytical  technologies  to meet the needs of its  customers,  introduce  those
technologies to new markets,  and finally,  employ the process  knowledge gained
from  customers in these  markets to develop new  proprietary  technologies.  In
1992,  based on  technologies  used in its EGIS  systems and TEA  Analyzer,  the
Company  developed  its line of Alexus  systems,  which detect trace  amounts of
contaminants  in refillable  plastic  bottles for the soft-drink  industry.  The
Coca-Cola Bottlers elected to retrofit all of their existing  refillable plastic
bottling  lines  outside  of the U.S.  with this  device,  creating  a  dramatic
increase in sales in 1993 through 1994. Sales of Alexus systems to the Coca-Cola
Bottlers were $32.2 million, or 64% of the Company's revenues, in 1994. By 1995,
the Coca-Cola Bottlers had substantially  completed their retrofit, and sales of
the  Alexus  systems  substantially  declined.  Sales of Alexus  systems  to the
Coca-Cola  Bottlers were $10.0 million and $10.6 million,  or 36% and 24% of the
Company's  revenues,  in 1995 and 1996,  respectively.  These revenues represent
product line upgrades by the Company's  installed  base,  and new bottling lines
added by the Coca-Cola  Bottlers.  The Company has sought to expand its customer
base and continues to develop Alexus upgrades and new applications and products.
The Company also  introduced  several new product lines over the last 12 months,
including its InScan and Flash-GC product lines. As the Company begins marketing
these and other products, including its EGIS explosives-detection equipment, the
Company  believes that it will become less dependent on its traditional  revenue
base.  No  assurance  can be given,  however,  that the Company  will be able to
significantly broaden the markets for its process detection systems.

    The Company's sales of its explosives-detection  systems for use in airports
has been and will  continue  to be  dependent  on  governmental  initiatives  to
require,  or support,  the  screening  of checked  luggage,  carry-on  items and
personnel with advanced  explosives-detection  equipment.  Significant terrorist
acts,  such as the downing of Pan  American  Flight 103,  the World Trade Center
bombing  and the  bombing  in  Oklahoma  City have  sparked  renewed  government
initiatives in the screening of people, baggage and packages at high-sensitivity
locations such as airports. In October 1996, in response to the explosion of TWA
Flight 800, the United States enacted  legislation which included $144.2 million
allocated for the purchase of  explosives-detection  systems and other  advanced
security equipment,  including trace equipment, such as the systems manufactured
by the Company for carry-on and checked baggage screening.  The Company believes
that  this  legislation  and  potential   follow-on   legislation  may  generate
significant growth in the market for explosives-detection instruments, including
trace-detection systems.

    A substantial  portion of the Company's  revenues  originate  outside of the
U.S.  Although the Company seeks to charge its customers in the same currency as
its  operating  costs,  the  Company's  financial  performance  and  competitive
position may be impacted by currency  exchange rate  fluctuations  affecting the
relationship between the U.S. dollar and foreign currencies.


                                       12






RESULTS OF OPERATIONS

FIRST QUARTER 1997 COMPARED WITH FIRST QUARTER 1996

    Revenues in the first  quarter of 1997  increased  33% to $12.4 million from
$9.3 million in the first  quarter of 1996.  Product  revenues  increased 38% to
$9.1 million in 1997 from $6.5 million in 1996, while service revenues increased
20% to $3.3  million  in 1997  from  $2.8  million  in 1996.  Revenues  from the
Company's process detection  instruments  increased to $4.7 million in 1997 from
$1.3  million  in  1996,  primarily  due to  $2.2  million  from  the  continued
fulfillment of a mandated product line upgrade from The Coca-Cola Company to its
existing  installed  base and, to a lesser  extent,  increased  shipments of the
Company's  InScan  systems,  which were  introduced  in 1996.  Revenues from the
mandated product-line upgrade are expected to continue through the third quarter
of 1997.  Revenues  from the Company's  EGIS  explosives  detection  systems and
related  services  decreased  to $1.0 million in 1997 from $2.9 million in 1996,
primarily  due to reduced  demand in 1997 when compared with the sale in 1996 of
eight EGIS systems to the U.S. government to provide  counter-terrorism  support
in Israel.  In May 1997, the Company was awarded a $6.2 million contract for its
EGIS  systems  from  the  Federal  Aviation  Administration.  Revenues  from the
Company's  Moisture  Systems  subsidiary  increased to $4.0 million in 1997 from
$2.9 million in 1996,  primarily  due to the  inclusion of revenues for the full
quarter in 1997.

    The gross profit  margin  increased to 51% in the first quarter of 1997 from
45% in the first quarter of 1996.  The gross profit  margin on product  revenues
increased to 49% in 1997 from 46% in 1996 as a result of a change in product mix
in 1997.  The gross profit margin on service  revenues  increased to 56% in 1997
from 42% in 1996,  primarily due to increased field service efficiencies and the
inclusion of  higher-margin  service revenues from Moisture Systems for the full
quarter in 1997.

    Selling,  general and  administrative  expenses as a percentage  of revenues
decreased to 28% in the first  quarter of 1997 from 38% in the first  quarter of
1996 as a result of an increase in revenues and  nonrecurring  costs in the 1996
period related to a reduction in personnel and other adjustments.  This decrease
was offset in part by increased  selling expense as the Company develops a sales
force for its InScan and Flash-GC systems.  Research and development expenses as
a  percentage  of revenues  declined  to 8.6% in the first  quarter of 1997 from
12.6% in the first quarter of 1996, primarily due to an increase in revenues and
the substantial completion of research and development relating to the Company's
InScan systems.

    Interest  expense,  related  party,  of $0.3 million in the first quarter of
1997 reflects the issuance of a $21.2 million  promissory  note to Thermedics in
connection with the January 1996 acquisition of Moisture  Systems.  This note is
due March 1998, and bears interest at the 90-day Commercial Paper Composite Rate
plus 25 basis points,  set at the beginning of each quarter.  See  "Transactions
with Affiliates."

    The  effective  tax rates were 40% and 37% in the first  quarter of 1997 and
1996,  respectively.  The  effective  tax  rates in both  periods  exceeded  the
statutory  federal  income tax rate  primarily due to the impact of state income
taxes.  The  effective  tax rate  increased  in 1997 due to higher  state income
taxes.

1996 COMPARED WITH 1995(1)

    Total  revenues  increased  to $43.8  million in 1996 from $28.0  million in
1995. Product revenues increased 69% to $31.3 million in 1996 from $18.5 million
in 1995, while service revenues increased 32% to $12.5 million in 1996 from $9.5
million in 1995.

    Revenues increased in 1996 due to the inclusion of $18.0 million in revenues
from Moisture Systems and Rutter,  which were acquired in January 1996. Revenues
from the Company's process detection  instruments  decreased to $16.0 million in
1996 from $18.5 million in 1995,  primarily due to a decrease in demand from the
Coca-Cola Bottlers,  which have substantially completed their initial deployment
of Alexus systems. Revenues from the Company's EGIS explosives-detection systems
increased to $7.1

1 References  to 1996,  1995 and 1994  herein  are for the  fiscal  years  ended
  December 28, 1996, December 30, 1995 and December 31, 1994, respectively.



                                       13






million in 1996 from $4.6  million in 1995,  primarily  due to the sale of eight
EGIS units to the U.S. government to provide counterterrorism support in Israel.
Revenues from research and  development  contracts  decreased by $2.2 million to
$1.8 million in 1996 due to the  completion  of a commercial  contract  with the
Miller  Brewing  Company  for the InScan  system and,  to a lesser  extent,  the
completion  of various  phases of  government  contracts,  which have since been
renewed.

    The gross profit margin increased to 49% in 1996 from 45% in 1995. The gross
profit  margin on product  revenues  increased  to 51% in 1996 from 46% in 1995,
primarily due to higher-margin revenues from Moisture Systems and Rutter, offset
in part by an inventory write-down of $0.8 million in the second quarter of 1996
due to obsolescence  created by planned product changes. The gross profit margin
on service revenues increased to 46% in 1996 from 44% in 1995,  primarily due to
the inclusion of  higher-margin  revenues from Moisture Systems and, to a lesser
extent, the impact of cost reductions implemented in late 1995 and early 1996.

    Selling,  general and  administrative  expenses as a percentage  of revenues
increased to 35% in 1996 from 27% in 1995, primarily due to higher expenses as a
percentage of revenues at Moisture  Systems and Rutter and, to a lesser  extent,
$0.4  million  of costs  incurred  in the  second  quarter  of 1996  related  to
reductions in personnel and a reduction in leased space in response to the lower
sales volume of process detection instruments.

    Research  and  development  expenses  increased to $4.6 million in 1996 from
$2.7 million in 1995,  primarily due to research and development relating to the
Company's  Flash-GC gas  chromatograph  and its InScan  high-speed X-ray imaging
system. In addition,  the Company recorded a nonrecurring charge of $0.2 million
in the  second  quarter  of 1996  for the  write-off  of  certain  research  and
development equipment no longer of use.

    Interest  expense,  related  party  of $1.1  million  in 1996  reflects  the
issuance of the $21.2 million promissory note to Thermedics discussed above.

1995 COMPARED WITH 1994

    Total  revenues were $28.0  million in 1995,  compared with $50.3 million in
1994. Product revenues decreased 54% to $18.5 million in 1995 from $40.4 million
in 1994,  and service  revenues  decreased  4% to $9.5 million in 1995 from $9.9
million in 1994.

    Revenues from the Company's process detection instruments decreased to $18.5
million  in 1995 from  $38.0  million in 1994,  primarily  due to a decrease  in
demand from the Coca-Cola  Bottlers,  which have  substantially  completed their
initial  deployment  of  Alexus  systems.   Revenues  from  the  Company's  EGIS
explosives-detection systems declined to $4.6 million in 1995 from $10.1 million
in 1994.  During  1993 and  1994,  large  orders  from BAA plc,  which  oversees
airports  in the United  Kingdom,  and the  German  government  accounted  for a
significant  portion of EGIS sales.  These  decreases  were offset in part by an
increase in research and development  contract  revenues of $2.1 million to $4.0
million in 1995 due to an  increase in  government  contract  revenue  and, to a
lesser extent, revenue from a commercial contract with Miller Brewing Company in
1995.

    The gross profit margin  declined to 45% in 1995 from 51% in 1994. The gross
profit margin on product revenues  decreased to 46% in 1995 from 55% in 1994 due
to the lower sales volume and, to a lesser extent, the inclusion of lower-margin
research and development  contract revenues.  The gross profit margin on service
revenues  increased  to 44% in 1995  from 31% in 1994 due to higher  margins  on
recent service contracts.

    Selling,  general and  administrative  expenses as a percentage  of revenues
increased  to 27% in 1995 from 24% of  revenues  in 1994,  primarily  due to the
lower sales volume in 1995.

    Research  and  development  expenses  decreased to $2.7 million in 1995 from
$3.9 million in 1994 due to a shift in the allocation of resources to externally
funded research and development contracts.


                                       14







LIQUIDITY AND CAPITAL RESOURCES

    Consolidated  working capital was $31.4 million at March 29, 1997,  compared
with $23.4 million at December 28, 1996.  Cash and cash  equivalents  were $47.3
million at March 29, 1997, compared with $13.5 million at December 28, 1996.

    During the first  quarter of 1997,  $6.0  million  of cash was  provided  by
operating activities.  During the first quarter of 1997, cash was provided by an
increase in current liabilities of $3.9 million, including $2.2 million of other
accrued  expenses,  primarily  related to costs incurred in connection  with the
Company's initial public offering.

    During the first  quarter of 1997,  the  Company  expended  $0.1  million on
purchases of property,  plant and  equipment.  During the remainder of 1997, the
Company expects to make capital expenditures of approximately $0.4 million.

    In March 1997, the Company sold  2,671,292  shares of its common stock in an
initial public offering at $11.50 per share for net proceeds of $28.1 million.

    Although the Company  expects to have  positive  cash flow from its existing
operations,  the Company anticipates it will require significant amounts of cash
for the possible acquisition of complementary  businesses and technologies.  The
Company expects that it will finance these acquisitions through a combination of
internal  funds,   additional  debt  or  equity  financing,   and/or  short-term
borrowings from Thermedics or Thermo Electron, although it has no agreement with
these companies to ensure that funds will be available on acceptable terms or at
all. The Company believes that its existing resources are sufficient to meet the
capital requirements of its existing businesses for the foreseeable future.


                                       15








                                 BUSINESS

OVERVIEW

    The Company develops,  manufactures and markets high-speed on-line detection
and measurement  systems used in a variety of industrial  process  applications,
explosives detection and laboratory  analysis.  The Company's industrial process
systems use ultratrace chemical detectors, high-speed gas chromatography,  X-ray
imaging, near-infrared spectroscopy and other technologies for quality assurance
of  in-process  and  finished  products,   primarily  in  the  food,   beverage,
pharmaceutical,   forest   products,   chemical  and  other  consumer   products
industries. The Company's explosives-detection equipment uses simultaneous trace
particle-   and   vapor-detection    techniques   based   on   its   proprietary
chemiluminescence and high-speed gas chromatography technologies.  Customers use
the  Company's  explosives-detection  equipment  to  detect  plastic  and  other
explosives at airports and border crossings,  for other high-security  screening
applications and for forensics and search applications.

    The Company's principal product lines include:

    * Alexus systems,  introduced in 1992,  detect trace amounts of constituents
      that affect product  quality in refillable  plastic soft drink,  water and
      other  beverage  containers at speeds in excess of 600 bottles per minute.
      Alexus systems have been installed on more than 200 bottling lines in more
      than 30 countries;

    * InScan systems,  introduced in 1996, detect liquid  fill-levels,  leakage,
      foreign objects and product defects at speeds in excess of 2,400 units per
      minute for the beverage, food and other industries;

    * Micro-Quad,  Quadra-Beam  and  other  products  of  the  Moisture  Systems
      division,  acquired by the  Company in 1996,  measure  moisture  and other
      product  constituents,   including  fats,  proteins,   oils,   flavorings,
      solvents,  adhesives and  coatings,  in the  manufacturing  processes of a
      variety of industries;

    * Flash-GC gas chromatography systems,  introduced in 1996, analyze chemical
      samples  at  speeds  20  to  50  times   faster  than   conventional   gas
      chromatography systems. These systems can be used in a variety of markets,
      primarily in near on-line  process and quality control  applications  that
      require high-speed results; and

    * EGIS explosives detectors,  first sold to commercial airports in Europe in
      1991,  detect and identify trace levels of explosives in carry-on bags, in
      checked   luggage   and  on  people,   and  are  also  used  in   forensic
      investigations. The Company believes that its EGIS systems are the world's
      most widely used trace particle/vapor  explosives-detection  systems, with
      an installed  base of more than 200 units in 21 countries,  including more
      than 100 units installed in airports.

    The Company's  historical  growth has resulted  primarily from a strategy of
developing proprietary  high-speed analytical  technologies to meet the needs of
its  customers,  introducing  those  technologies  to new markets and,  finally,
employing  the process  knowledge  gained from the customers in these markets to
develop new proprietary  technologies.  For example,  the Company's TEA Analyzer
was the first  instrument to use  chemiluminescent  analysis to reliably  detect
nitrogen-based  carcinogens  in foods,  beverages and other  consumer  products.
Enhanced   TEA   Analyzer   technology   is   used   in   the   Company's   EGIS
explosives-detection  systems  as  well  as in the  Alexus  systems  used in the
beverage  industry.  In 1995, in response to the needs of its beverage customers
for more sensitive,  high-speed  fill-level and leakage  detectors,  the Company
developed its InScan system based on a proprietary X-ray technology. The Company
is currently  enhancing  InScan to detect foreign objects and product defects in
the broader  packaged  goods markets for the food,  consumer  products and other
industries.

    The  Company's  strategy is to build upon its  reputation as a technical and
market  leader in  applications  requiring  complex,  high-speed  or  continuous
ultratrace  detection and  measurement by continuing the technology  development
and  market-application  cycle on which its growth  has been based to date.  The
Company holds significant patents relating to its chemiluminescent  analysis and
high-speed gas  chromatography  technologies,  and believes that its proprietary
position with respect to 


                                       16







these technologies affords it a competitive advantage.  In addition, the Company
employs highly skilled research scientists and product development engineers who
use their intimate knowledge of their customers' production processes to develop
new products based on these technologies.

    The Company's  customers are  characterized  by the need to improve  product
quality and  consistency  while reducing  production  costs.  Effective  quality
control  requires  high-speed  systems  that can test samples  on-line,  or near
on-line,  so that adjustments to the  manufacturing  process can be made quickly
and  frequently.  More  effective  sampling  reduces the amount of  unacceptable
product  produced.  Similarly,  airports  and  other  security  checkpoints  are
required to screen  increasing  volumes of  passengers  and baggage  with a high
degree of accuracy without causing undue inconvenience and delays. Consequently,
the time between the initiation of the testing process and the completion of the
analysis must be reduced to the greatest  practical extent. The Company believes
that its high-speed  detection and measurement  systems meet the requirements of
these demanding  applications and, as a result,  systems based on its high-speed
analytical  techniques will become  increasingly  employed in a wider variety of
applications.

PROCESS DETECTION SYSTEMS

    The Company  designs,  manufactures  and markets  high-speed  on-line  trace
(parts-per-trillion)  measurement,  detection and rejection  equipment that uses
particle-detection,  vapor-detection  and other technologies for product quality
and  productivity  applications.  The Company  currently  addresses  the product
content and packaging segment of this market.

    Alexus.  The Company's  Alexus systems detect trace amounts of  constituents
that affect product  quality in refillable  plastic soft drink,  water and other
beverage  containers.  The  Company  believes  that  it is the  world's  largest
supplier of quality assurance systems for refillable  plastic  containers to the
beverage industry.  The Company's Alexus systems,  introduced in 1992, have been
installed on more than 200 bottling  lines in more than 30 countries  throughout
the world,  primarily in Europe and Latin and South  America,  by the  Coca-Cola
Bottlers,  Perrier and other major beverage  producers.  Alexus systems sell for
between $150,000 and $500,000 per unit.

    The  Company  believes  that  its  Alexus  systems  are the  most  accurate,
cost-effective  and easily  maintained  systems of their  kind.  The Alexus A100
system obtains vapor samples from refillable plastic bottles of up to two liters
passing  along a production  line at speeds in excess of 600 bottles per minute.
Alexus  operates  by  sending  a small  burst of air into each  bottle  and then
capturing some of the displaced  vapor.  Each vapor sample is sent through three
different  channels for analysis:  two  chemiluminescence  detectors are used to
search for both nitrogen-based compounds, such as ammonia and nitrogen organics,
and for volatile organic compounds.  The third channel, strobe analysis, is used
to detect gasoline and other  hydrocarbons.  In addition,  an optical  detection
module is used to detect  nonvolatile  compounds  such as soaps and  detergents.
Optical  detection is also used to inspect  refillable  water  bottles for fruit
juices  and  other  flavor  substances.  Once  the  analysis  is  completed,  an
electronic  signal is sent from the Alexus to indicate the bottle  status.  Each
bottle is  tracked  and a  rejecter  module  then  automatically  separates  the
acceptable and rejected bottles onto separate tracks. The Alexus W10, introduced
in 1994, incorporates strobe analysis and a chemiluminescence detector to detect
similar  compounds in refillable  three-,  five- and six-gallon water bottles at
speeds of up to 3,600 bottles per hour.

    Refillable plastic bottles are widely used for soft drinks,  water and other
beverages.  The United  States  permits the reuse of large plastic water bottles
used in commercial  water  dispensers.  Certain  countries,  including  Denmark,
Holland and Norway,  require the reuse of  refillable  plastic  bottles and many
countries, including Germany, Finland and Sweden, place a high tax on the use of
nonrecyclable  containers.  In  addition,  bottlers and  consumers  often prefer
plastic bottles because they are lighter, less breakable and easier to transport
than glass  bottles.  Refillable  plastic  bottles  also  provide a  significant
economic  advantage to beverage companies because they may be returned for reuse
as  many  as 30  times.  Industry  sources  estimate  that  as many as 1% of the
returned  bottles cannot be reused,  even after  cleaning,  because they contain
foreign  substances  that  can  chemically  bond  with  the  plastic  container.
Refilling  a bottle that  contains a foreign  substance  is of major  concern to
beverage  producers  because the publicity  associated with an abused bottle can
severely damage a brand name and a bottler's 


                                       17






reputation. The Company believes that demand for Alexus systems will increase as
its  current  customers  expand  into  new  markets  around  the  world,  as the
technology  is  accepted by  additional  beverage  producers  and as the Company
provides upgrades to its installed customer base.

    InScan. The Company's InScan system uses high-speed X-ray imaging technology
to detect liquid  fill-levels  and leakage in containers for the beverage,  food
and  other  industries.  InScan  uses a  low-power  X-ray to  capture  data both
vertically and  horizontally.  This data produces an instant,  detailed image of
each container that InScan's  proprietary software  automatically  compares to a
predetermined profile and generates mathematical algorithms to determine whether
the container is acceptable.  InScan  incorporates a  sophisticated,  high-speed
rejection system that  automatically  removes  unacceptable  containers from the
line.  The Company  shipped its first  InScan  units in 1996.  The Company  also
believes  that  these  systems  have   applications  in  the  broader  packaging
inspection  market.  InScan systems currently sell for an average of $35,000 per
unit.

    Bottlers have  traditionally  detected  fill-level and leakage by shooting a
pinpoint  gamma ray through a bottle or can on a production  line. The principal
disadvantages of gamma-based  systems are their limitations in both accuracy and
the scope of detection, as well as their potential for radioactive contamination
of personnel and machinery.  The wider image generated by InScan's X-ray imaging
technology  means  that  accuracy  is  unaffected  by the  speed  of  the  line,
acceleration  or  deceleration  of the line,  sloshing of contents or vibration.
Consequently, InScan can be used on lines running at speeds of up to 2,400 units
per  minute,  with an accuracy of +/-0.5  millimeters  over the entire  range of
inspection speeds.  Moreover,  because the system is designed to image a portion
of a can or  bottle,  rather  than a  pinpoint,  InScan  can be used  to  detect
improper  or  missing  lids,  caps or  tabs,  as well  as the  integrity  of the
container from the shape of the lid or cap.  Other  advantages of InScan include
reduced health hazards due to the  elimination  of potential  radioactive  gamma
hazards,   simple   positioning   anywhere  on  a  production   line  and  quick
adjustability to fit packages of varying shapes.

    The  Company   believes  that  its  InScan  X-ray   imaging   technology  is
significantly more accurate than traditional  single-point  gamma-based systems.
The Company also  believes  that the  increased  accuracy of InScan  systems can
result in substantially fewer short-filled or over-filled containers, permitting
an InScan system to pay for itself in as few as nine months.

    The Company's InScan systems are currently used by major beer and soft drink
companies in the U.S. and  overseas,  including  Miller,  Molson,  Coors and the
Coca-Cola  Bottlers.  The Company  believes that demand for InScan  systems will
increase as additional  bottlers  perceive the benefits of the  technology.  The
Company is also currently developing new applications for InScan,  including the
detection of foreign  objects such as bone  fragments  and plastic in baby food,
and product defects in packaged goods for the food,  consumer products and other
industries.

    Moisture Systems. The Company's Moisture Systems division, acquired in 1996,
designs, manufactures and markets equipment that uses near-infrared spectroscopy
to measure moisture and other product  constituents,  including fats,  proteins,
oils,   flavorings,   solvents,   adhesives  and  coatings,   in  a  variety  of
manufacturing  processes.  The  Company's  systems  are used  across  the  food,
pharmaceutical,  chemical,  petrochemical,  tobacco,  forest products,  pulp and
paper, paper converting,  plastics, textiles,  corrugating and other industries.
The Company  believes that it is the world's largest  supplier of  near-infrared
on-line  constituent-measurement  products,  with an installed base of more than
10,000 units. With a large installed base over a wide range of applications, the
Company has built a base of knowledge  and  experience  that it believes to be a
competitive advantage.  The Company's systems generally sell for between $10,000
and $100,000 per unit.

    The  Company's   moisture-analysis   equipment   determines  the  amount  of
near-infrared  light absorbed by a sample at each given  wavelength to precisely
identify  and measure the content of the  sample's  constituent  molecules.  The
Company's  principal products include the Quadra-Beam and Micro-Quad,  which are
designed to precisely  measure moisture and other product  constituents at fixed
points on a variety of solid  materials.  Quadra-Beam  instruments  operate with
either  one or two  sensors,


                                       18






and measure a single constituent per sensor. Micro-Quad instruments operate with
up to five  sensors,  and are capable of  measuring  multiple  constituents  per
sensor.  Both Quadra-Beam and Micro-Quad  products can be incorporated into more
complex  systems.  For example,  the Company's  Profile  Video  Display  Systems
measure product  constituents  across webs for applications in the paper,  paper
converting, sheet metal, textile and other industries.  Similarly, the Company's
liquid and gas systems are designed to measure product constituents in liquid or
gas streams  moving  through  pipes.  Customers  for these  systems  include the
petrochemical, chemical, food, beverage, plastics and polymer industries.

    Manufacturers  need to perform  precise  measurements  of moisture and other
product  constituents to ensure product  quality and consistency  while reducing
production costs. Manufacturers have historically performed such measurements on
samples  taken from  production  lines for  laboratory  analysis.  The Company's
moisture-analysis products provide continuous,  nondestructive analysis, without
requiring sample preparation or contact,  making information instantly available
to the  operator or computer  controlling  the  production  process.  In certain
applications,  these instruments can be incorporated  into closed-loop  systems.
For example,  an  instrument  detecting  insufficient  moisture in a product can
relay an  electronic  signal  to an oven  elsewhere  on the  production  line to
decrease the amount of moisture to be extracted during the drying process.

    Approximately  60% of the Company's  sales of on-line  moisture  measurement
products are to new manufacturing facilities, facilities expanding by adding new
production  lines and  facilities  incorporating  on-line  systems for the first
time, and  approximately  40% are to replace  existing  on-line  equipment.  The
Company sells its moisture-analysis equipment primarily in the United States and
in Europe.  The  Company  expects  that  certain  geographical  markets for this
equipment,  including  the  Asia/Pacific  region  and Latin  America,  will grow
significantly over the next several years as countries in that region accelerate
their industrialization and their production of consumer products and industrial
goods, such as paper and cardboard.

FLASH-GC GAS CHROMATOGRAPHY SYSTEMS

    The Company designs,  manufactures and markets high-speed gas chromatography
systems that can analyze  chemical  samples at speeds 20 to 50 times faster than
conventional gas chromatography. The Company currently markets its systems under
the trade name "Flash-GC" to analytical  services and quality  laboratories  and
for  near  on-line  process  and  quality  control   applications  that  require
high-speed results. The Company also intends to target certain other segments of
the  conventional  gas  chromatography  market  in which  access  to  high-speed
analysis would be advantageous.

    As in  traditional  gas  chromatography,  a sample  is  introduced  into the
Flash-GC and is  separated  into its chemical  constituents  in a  chromatograph
column under heat and pressure.  Traditional gas chromatographs place the column
in a heated oven.  In contrast,  the Flash-GC  uses  patented or  patent-pending
technology to  dynamically  heat the column itself rather than the large mass of
air in the oven. Coupled with the Flash-GC's intermediate controlled-temperature
trap zones,  this technology  permits the Flash-GC to separate a sample into its
constituents  20 to 50 times faster than a  conventional  gas  chromatograph  in
certain  applications.  As in  conventional  gas  chromatography,  the  chemical
constituents enter a detector at the end of the Flash-GC column, which gives off
an  electric  signal  corresponding  to the  identity of each  constituent.  The
Flash-GC is not suitable for all  applications  because some detectors used with
conventional gas  chromatographs  cannot respond rapidly enough to the output of
the Flash-GC.  The Company believes,  however, that with the detectors currently
available with the Flash-GC,  and with detectors  currently  under  development,
this  technology  can  serve  a  significant  portion  of the  conventional  gas
chromatography market in which speed is important.

    The Company  believes  that the Flash-GC has potential  applications  in the
food, flavors,  fragrance,  chemical,  pharmaceutical,  forensics and automotive
industries, as well as for medical and environmental  laboratories.  The Company
believes that the market for high-speed gas  chromatography is only beginning to
develop and the Company  intends to target only those sectors of the  laboratory
and process gas  chromatography  market that are  expected to place a premium on
near-instant  analysis. For 


                                       19





example,  food  processors  subject to the Food Quality  Protection  Act use gas
chromatography to ensure that packaged foods contain the correct ingredients and
in the proper proportions.  Today, a typical gas chromatography  analysis of the
ingredients in packaged foods may require 40 minutes,  a time frame in which the
food  processor  continues  to produce a large  volume of its product  that must
ultimately  be  disposed  of  if  the  analysis  demonstrates  nonconformity  to
applicable  standards.  The Flash-GC permits food processors to perform the same
analysis in less than two minutes. Other customers using the Flash-GC include an
automobile   manufacturer   performing  on-line  emissions  testing,  a  company
evaluating its wastewater  during  discharge and a beverage  company  evaluating
production  ingredients at the point of mixing.  In each case,  these  customers
have  reported  analyses 20 to 50 times  faster than with the  conventional  gas
chromatographs   currently  in  use,  with  significant   improvements  in  both
productivity and quality.

    The Flash-GC, a new technology introduced in 1996, received both the Pittcon
Editors'  Gold Award for the best new product  exhibited at Pittcon '96, a major
U.S. analytical instrument conference, and the Most Innovative New Product Award
at the Het Instrument '96  Conference,  a major European  analytical  instrument
conference. The Company shipped ten Flash-GC units for beta testing in 1996. The
Company is currently building a sales and marketing  organization to support the
Flash-GC,  and began shipping production units in the first quarter of 1997. The
Flash-GC systems are priced at between $60,000 and $75,000 per unit. The Company
is continuing to develop the Flash-GC to configure it with additional  detectors
and to introduce a process-oriented version for additional on-line applications.

EXPLOSIVES DETECTORS

    The Company designs, manufactures and markets explosives-detection equipment
that uses trace particle-and  vapor-detection  techniques for forensics,  search
and  screening  applications  under the  direction  of  police,  border  police,
transportation  authorities and carriers.  The Company's  principal  explosives-
detection  system is EGIS,  a highly  sensitive  particle-  and  vapor-detection
system  for  screening  people,  baggage,  packages,   freight,  and  electronic
equipment  such as  personal  computers  for the  presence  of a wide  range  of
explosives,  including  plastic  explosives that have proven difficult to detect
using conventional  methods.  The EGIS system is designed for stand-alone use in
the detection of explosives in carry-on items and on personnel,  and can be used
in conjunction with enhanced X-ray and other advanced imaging systems to provide
a comprehensive explosives-detection system for checked luggage.

    Explosives-detection  equipment  used  in  security  screening  applications
comprises  two distinct  categories  that are  generally  combined into a single
system: enhanced X-ray technologies, such as computed tomography ("CT") and dual
energy X-ray systems, and trace detection technologies, such as the EGIS system.
Because of its medium- to  high-throughput  rate,  enhanced  X-ray  equipment is
generally  used in the  initial  screening  of checked  luggage in  multi-tiered
systems,  with  trace  equipment  placed  at  the  end  of  the  process.  X-ray
technology,  however,  is relatively  capital  intensive and generally  requires
significant engineering to fit into existing luggage systems. Trace equipment is
sensitive  to  minute  quantities  of  explosive  particles,  and  is  generally
physically smaller, more portable and less expensive than X-ray equipment. Trace
equipment that combines gas  chromatography  with a detector can  simultaneously
detect more types of  explosives  than units  employing  only a detector.  Trace
systems  currently require  hand-held sample  collectors.  This typically manual
process  results in a  throughput  level  below that of  enhanced  X-ray.  Trace
systems can be used  effectively to manually screen checked baggage  rejected by
X-ray systems,  which have a relatively high false positive rate.  Trace systems
have  throughput  rates that allow them to be used  effectively on a stand-alone
basis in carry-on and walk-through screening applications.

    In response to the crash of TWA Flight 800 in July 1996,  President  Clinton
formed the White House  Commission on Aviation  Safety and Security,  chaired by
Vice  President  Gore (the "Gore  Commission"),  to review  airline  and airport
security and oversee aviation safety.  Both the Gore Commission and the Baseline
Working Group, a  government/industry  panel that was  established  prior to the
crash of TWA Flight 800 to  recommend  an airport  security  plan for the United
States,  have recommended that trace detection  equipment be used in series with
enhanced X-ray systems for screening  checked  luggage.  The Gore Commission and
the Baseline Working Group also recommended the use of trace detection equipment
for screening passengers and carry-on baggage.


                                       20







    The  Company  believes  that EGIS is the most  accurate  and most  sensitive
high-speed trace  explosives-detection  equipment available today. EGIS utilizes
the Company's Flash-GC  high-speed gas chromatography  technology  combined with
chemiluminescent detection techniques to detect ultratrace quantities of certain
explosives and taggants,  and indicate the  concentration  and type of explosive
detected.  Because EGIS' chemiluminescent detector responds only to compounds of
certain  structures in the sample,  rather than the thousands of compounds  that
may be contained in the sample,  EGIS is more  selective  than  competing  trace
detection systems,  with fewer  false-positive  detections.  A processor in EGIS
compares  the  chemical  profile of the sample to the known  profiles of various
explosives,  including TNT, nitroglycerin,  PETN, Semtex and C-4. Within seconds
of the  introduction  of the sample  into EGIS,  the system  determines  whether
explosives are present, and, if so, identifies the type and amount.

    The Company believes that it is the worldwide leader in providing explosives
trace detection equipment.  Initially developed with internal funds and contract
funding from the FAA and the U.S.  Department of State, more than 200 EGIS units
have been  deployed to date.  The EGIS  system is  currently  operational  in 21
countries and is in use in carry-on and checked  luggage  screening at more than
42  international  airports.  EGIS is  also  used in  government  buildings  and
embassies,  and at border  crossings and other  locations  where there is a high
degree of concern  for  security.  The EGIS system has  assisted in  identifying
explosives used in terrorist  bombings,  including those in Federal  Building in
Oklahoma  City and the World  Trade  Center in New York,  as well as in  Israel,
Buenos Aires and the United  Kingdom.  In March 1996,  the Company  supplied the
U.S. government with eight EGIS systems to provide  counter-terrorism support in
Israel.  Most  recently,  the Bureau of Alcohol,  Tobacco and  Firearms  and the
Federal Bureau of  Investigation  used EGIS systems in their attempt to identify
the cause of the crash of TWA Flight 800.

    Of the more  than  600  commercial  airports  worldwide,  more  than 400 are
located in the United States,  150 are in Europe and 50 are in the  Asia/Pacific
region.  Following  the bombing of Pan  American  Flight 103,  various  European
governments  mandated the use of, and purchased,  advanced  explosives-detection
systems.  The FAA has  approved  the use of several  trace  systems  for various
applications,  and  approved  the EGIS system for  voluntary  use by airlines in
screening carry-on  electronic items and luggage searches in 1992.  Although the
FAA  certified  a CT-based  system for  screening  checked  baggage in 1994,  no
CT-based  system  has yet  demonstrated  compliance  with  FAA  standards  under
realistic  airport operating  conditions.  To date, the FAA has not mandated the
use of any  explosives-detection  system.  In October  1996,  the United  States
enacted  legislation  that includes a $144.2 million  allocation for the initial
purchase of explosives-detection  systems and other advanced security equipment.
This legislation specifically requires the purchase of 79 advanced X-ray imaging
devices for screening checked luggage,  together with one trace detection system
to be used  with  each  such  X-ray  imaging  system.  An  additional  410 trace
detection systems are to be purchased for use in screening carry-on baggage. The
Company believes that  approximately $32 million has been allocated to purchases
of trace detection equipment such as the systems manufactured by the Company. In
May 1997, the FAA announced that it was making a $12.2 million purchase of trace
explosives-detection  equipment for use at the nation's busiest  airports.  That
purchase  included an order for  approximately 50 EGIS systems for $5.8 million,
with an option to order 200 more units in the future.

    In December 1996, the Baseline Working Group  recommended the expenditure of
$1.8 billion between 1997 and 2000 for carry-on and checked luggage and personal
screening  at larger  U.S.  airports,  and  recommended  the  expenditure  of an
additional $3.9 billion between 2001 and 2005 to complete the U.S.  system.  The
Company  believes  that  if the  United  States  mandates  the  installation  of
explosives-  detection  equipment in a substantial number of domestic commercial
airports, then the market for trace detection systems such as the Company's EGIS
system will grow rapidly for several years. There can be no assurance,  however,
that the Company's  systems would meet any applicable FAA  requirements or that,
even if the Company's  systems were to meet  applicable  requirements,  that the
Company  would be able to market its systems  effectively.  See "Risk Factors --
Dependence of Explosives  Detection Market on Government  Regulation and Airline
Industry."


                                       21







    The EGIS system sells for between $160,000 and $200,000.  In September 1996,
the Company entered into a development contract with the FAA to develop EGIS II,
a  lower-cost  EGIS unit for use in more  portable  applications  such as remote
security  checkpoints and  counter-terrorism  activities.  In November 1996, the
Company  introduced  its new  SecurScan,  a prototype  of a  walk-through  trace
detector  designed to screen 10 passengers  per minute,  and  announced  that it
intends to introduce  Rampart,  a lower-cost unit for airport  applications,  in
1997. In May 1997,  the Company was awarded a $2.75 million  contract to develop
and manufacture  advanced  explosives-detection  equipment for the government of
the United  Kingdom.  SecurScan  and Rampart are expected to cost  approximately
$300,000 and $55,000, respectively.

MARKETING, SALES AND SERVICE

    The Company employs a variety of sales methods for its products and services
that are designed to fit the needs of particular  customer  groups.  The Company
sells and services  Alexus  systems,  principally  outside of the United States,
with a small,  specialized  direct sales force  supported  by a broader  service
organization.  Alexus  systems are also sold through Krones GmbH, a large German
turnkey plant  contractor for new bottling lines. The Company sells and services
both its InScan  and  Moisture  Systems  and  equipment  through a mix of direct
sales,   manufacturers   representatives  and  original  equipment  manufacturer
relationships  around the world.  The  Company  also  operates  factory  service
centers for these products.

    The Company's  Flash-GC systems are sold through a direct sales and services
organization.  The Company is currently  attempting to recruit additional direct
sales representatives for certain regions of the United States. In addition, the
Company  intends  to use  specialized  manufacturers  representatives  in  other
territories. The Company currently has such representatives in Europe and in the
Southern United States.

    EGIS  explosives-detection  systems  are  sold to a few key  decision-makers
around the world,  primarily government agencies or private companies fulfilling
government regulations. Accordingly, EGIS sales are made by a small, specialized
direct sales force,  supported by a broader service  organization,  from offices
shared with Alexus sales and service organizations.

    The Company's existing sales and service  organizations are located in North
and South  America and Europe.  The Company  also has  distribution  and service
capabilities  in Asia  through  a  combination  of direct  sales,  manufacturers
representatives and original equipment manufacturer relationships.

INTELLECTUAL PROPERTY

    The  Company's  policy  is to  protect  its  intellectual  property  rights,
including  applying for patents when  appropriate.  The Company also enters into
licensing  agreements with other companies in which it grants or receives rights
to specific  patents and technical  know-how.  The Company owns numerous  United
States and foreign patents,  and has filed applications for additional  patents.
In addition, the Company has an exclusive, perpetual, royalty-free license under
certain  patents  covering  the  use of  near-infrared  and  very  near-infrared
emitting  diodes for on-line  spectral  measurements.  The Company  owns several
patents covering certain aspects of its chemiluminescent analysis technology and
high-speed  gas  chromatography  technology.  The  Company  believes  that these
patents  provide  the Company  with  competitive  advantages  in the markets for
certain of its products.  The Company also considers technical  know-how,  trade
secrets and  trademarks  to be important to its  business.  See "Risk Factors --
Limited Protection of Proprietary Technology and Risks of Third-Party Claims."

COMPETITION

    The markets for the Company's products are highly  competitive.  Competitors
may develop  superior  products  or products of similar  quality for sale at the
same or lower  prices.  Moreover,  there can be no assurance  that the Company's
products  will not be rendered  obsolete by new  industry  standards or changing
technology.  There can be no assurance  that the Company will be able to compete
successfully  with  existing or new  competitors.  See "Risk  Factors -- Ongoing
Product  Development  Efforts  Required by Rapid  Technological  Change" and "--
Competition; Technological Change."


                                       22






    Process  Detection  Systems and  Flash-GC.  The  Company's  product  quality
assurance  systems  compete  with  detection  systems  manufactured  by numerous
companies.  The Company  believes,  however,  that these companies are generally
focused on particular niches in the process  detection  systems market,  only in
some of which does the Company compete. The Alexus system encounters competition
throughout the world, but primarily in the German-speaking areas of Europe, with
products  offered by Walter  Grassle  GmbH of Germany  and  Sudtronics  S.A.  of
Switzerland.  InScan competes with gamma-based  beverage  fill-height  detectors
offered by a number of companies,  including Industrial Dynamics Company,  based
in California,  and Heuft Systemtechnik  GmbH, based in Germany.  Competition in
the  moisture-detection  market is highly  fragmented.  The Company's  principal
competitor in this market is Infrared Engineering Limited, based in England.

    The Flash-GC is a new technology competing in the developing  high-speed gas
chromatography  market  segment.  The Company's  Flash-GC  competes  principally
against high-speed gas chromatographs offered by ChromFast, based in Michigan.

    Competition  in the  markets  for each of the  Company's  process  detection
systems and the Flash-GC is based primarily on performance,  durability, service
and, to a lesser extent, price.

    Explosives  Detection  Systems.  In  the  explosives-detection  market,  the
Company  competes  with a small number of companies,  including  other makers of
chemical  trace  detection  instruments,  and,  to a lesser  degree,  makers  of
enhanced  X-ray  detectors.  Competition  in this market is based  primarily  on
performance,  including speed,  accuracy and the range of explosives that can be
detected; ease of use; service; and price. The Company's principal competitor in
the trace detection market is Barringer  Technologies Inc., a Canadian firm that
has placed several trace detectors in airport applications. The Company believes
that the companies,  if any,  whose devices are  ultimately  required by the FAA
will have a substantial competitive advantage in the United States.

GOVERNMENT REGULATION

    The  explosives-detection  systems  manufactured and marketed by the Company
for use in airports are subject to regulation by the FAA,  corresponding foreign
governmental authorities and The International Civil Aviation Organization,  the
United Nations organization for establishing standard practices for the aviation
industry  on a  worldwide  basis.  Sales of the  Company's  explosives-detection
systems for use in airports  have been and will  continue to be  dependent  upon
governmental  initiatives  to require  or  support  the  screening  of  baggage,
carry-on  items  and  people  with  advanced   explosives-detection   equipment.
Substantially  all of such systems have been  installed at airports in countries
in which the  applicable  government  or  regulatory  authority  overseeing  the
operations  of the  airport has  mandated  such  screening.  Such  mandates  are
influenced  by many  factors  outside of the control of the  Company,  including
political and budgetary concerns of governments, airlines and airports. To date,
the FAA has not mandated the use of any  explosives-detection  system. See "Risk
Factors -- Dependence of Explosives  Detection  Market on Government  Regulation
and Airline Industry."

RESEARCH AND DEVELOPMENT

    The Company  maintains  active programs for the development and introduction
of new products and improvements to existing products. The Company also seeks to
develop new applications for its existing  products and technology.  The Company
is  currently  devoting  significant  resources  toward the  enhancement  of its
existing  products  and  the  development  of  new  products  and  technologies,
including: enhancing InScan to detect foreign objects and, in some applications,
product  defects in packaged  goods for the food,  consumer  products  and other
industries; developing an advanced generation of moisture- detection products to
address   recently   identified   customers   needs;   adding   auto-calibration
capabilities to its Alexus system;  completing production units of the Flash-GC,
as well as beginning to enhance the  Flash-GC to broaden its  applications;  and
developing  Rampart,  a lower-cost unit for use in airport screening of carry-on
baggage.


                                       23






    The Company also performs contract  engineering and/or development on behalf
of its  customers.  Recent  contracts  have  included  funding by the FAA of the
development of the SecurScan walk-through explosives-detection system as well as
feasibility  studies  and  initial  development  work for EGIS II.  The  Company
believes that its  reputation for being able to apply its core  technologies  to
solve  production  problems  of  its  customers  provides  the  Company  with  a
significant competitive advantage.

    Company-funded   research  and   development   expenses   were   $3,895,000,
$2,741,000,  $4,608,000 and $1,071,000 in fiscal 1994,  1995, 1996 and the three
months ended March 29, 1997,  respectively.  Contract  research and  development
revenues were  $1,923,000,  $3,987,000,  $1,758,000 and $498,000,  respectively,
during the same periods.

EMPLOYEES

    As of March 29,  1997,  the Company had 215  full-time  employees,  of which
seven were engaged in senior management, 23 in administration and accounting, 46
in research and  development,  45 in sales and marketing,  48 in product support
and 46 in  manufacturing.  None of the Company's  employees are represented by a
labor union,  and the Company  considers its relations  with its employees to be
good.  To date,  the Company  has been able to attract and retain the  personnel
required by its business,  but there can be no assurance that additional skilled
personnel necessary to successfully expand the Company's business and operations
can be recruited and retained.

BACKLOG

    At March 30, 1996 and March 29, 1997,  the Company's  backlog of firm orders
was approximately $9,427,000 and $10,827,000, respectively. The Company includes
in backlog only those orders for which it has received completed purchase orders
and for which delivery has been specified within twelve months.  Most orders are
subject to cancellation by the customer.  Because of the possibility of customer
changes in delivery  schedules,  cancellation of orders and potential  delays in
product  shipments,  the Company's  backlog as of any particular date may not be
representative of actual sales for any succeeding period.

FACILITIES

    The Company operates from two principal  facilities:  a 113,000-square  foot
office,  research and  development,  and  manufacturing  facility in Chelmsford,
Massachusetts  occupied under a lease expiring in 2006, subject to one five-year
renewal option at the election of the Company;  and a 40,000-square  foot office
and manufacturing  facility in Hopkinton,  Massachusetts  occupied under a lease
expiring in 1998.  The Company  also leases  approximately  9,000 square feet in
Enschede,  Holland  occupied  under a lease  expiring in 2000. In addition,  the
Company  leases  office  space  throughout  the world for its sales and  service
operations.  The Company  believes  that these  facilities  are adequate for its
present operations.

LEGAL PROCEEDINGS

    The  Company  is not a  party  to any  litigation  that  it  believes  could
reasonably be expected to have a material  adverse  effect on the Company or its
business.


                                       24







             RELATIONSHIP WITH THERMO ELECTRON AND THERMEDICS

    Thermo  Electron  has adopted a strategy  of selling a minority  interest in
subsidiary  companies to outside  investors  as an important  tool in its future
development.  As part of this strategy,  Thermedics has created the Company as a
subsidiary, and Thermedics and Thermo Electron, and certain of its subsidiaries,
have created several other privately and publicly held  subsidiaries.  From time
to time, Thermo Electron and its subsidiaries  will create other  majority-owned
subsidiaries as part of its spin-out strategy. (The Company and the other Thermo
Electron subsidiaries are hereinafter referred to as the "Thermo Subsidiaries.")

    Thermedics  develops,  manufactures,  and markets product quality  assurance
systems,  precision-  weighing and inspection  equipment,  electrochemistry  and
micro-weighing  products,   electronic-test  instruments,   explosives-detection
devices,  and  moisture-analysis  systems,  as well as implantable  heart-assist
devices and other  biomedical  products.  For its fiscal year ended December 28,
1996,  and the three months ended March 29, 1997,  Thermedics  had  consolidated
revenues of $292,077,000  and  $72,057,000,  respectively,  and consolidated net
income of $29,138,000 and $21,966,000, respectively.

    Thermo  Electron  and  its  subsidiaries  develop,  manufacture  and  market
environmental  monitoring and analysis  instruments,  papermaking  and recycling
equipment,  biomedical  products such as heart- assist  devices and  mammography
systems,  biomass electric power generation,  and other specialized products and
technologies.  Thermo Electron and its subsidiaries  also provide  environmental
and  metallurgical   services  and  conduct  advanced  technology  research  and
development.  For its fiscal year ended  December 28, 1996, and the three months
ended  March  29,   1997,   Thermo   Electron  had   consolidated   revenues  of
$2,932,558,000  and $763,505,000,  respectively,  and consolidated net income of
$190,816,000  and  $52,058,000,  respectively.  See "Risk  Factors --  Potential
Conflicts of Interest."

THE THERMO ELECTRON CORPORATE CHARTER

    Thermo  Electron  and  the  Thermo  Subsidiaries,   including  the  Company,
recognize that the benefits and support that derive from their  affiliation  are
essential elements of their individual performance. Accordingly, Thermo Electron
and each of the  Thermo  Subsidiaries  adopted  the  Thermo  Electron  Corporate
Charter (the "Charter") to define the  relationships and delineate the nature of
such cooperation among themselves.  The purpose of the Charter is to ensure that
(1) all of the companies and their  shareholders  are treated  consistently  and
fairly,  (2) the scope and nature of the  cooperation  among the companies,  and
each company's  responsibilities,  are adequately defined,  (3) each company has
access to the combined  resources and financial,  managerial  and  technological
strengths of the others, and (4) Thermo Electron and the Thermo Subsidiaries, in
the aggregate, are able to obtain the most favorable terms from outside parties.

    To achieve these ends, the Charter  identifies the general  principles to be
followed  by the  companies,  addresses  the  role and  responsibilities  of the
management of each company,  provides for the sharing of group  resources by the
companies  and  provides  for  centralized  administrative,  banking  and credit
services to be performed  by Thermo  Electron.  The services  provided by Thermo
Electron include collecting and managing cash generated by members, coordinating
the access of Thermo Electron and the Thermo  Subsidiaries  (the "Thermo Group")
to external  financing  sources,  ensuring  compliance  with external  financial
covenants  and internal  financial  policies,  assisting in the  formulation  of
long-range planning and providing other banking and credit services. Pursuant to
the Charter,  Thermo Electron may also provide guarantees of debt obligations of
the Thermo Subsidiaries or may obtain external financing at the parent level for
the  benefit  of the  Thermo  Subsidiaries.  In  certain  instances,  the Thermo
Subsidiaries  may provide credit  support to, or on behalf of, the  consolidated
entity or may obtain financing directly from external  financing sources.  Under
the Charter,  Thermo  Electron is responsible  for  determining  that the Thermo
Group remains in compliance  with all  covenants  imposed by external  financing
sources,  including  covenants related to borrowings of Thermo Electron or other
members of the Thermo Group,  and for apportioning  such constraints  within the
Thermo Group. In addition, Thermo Electron is also responsible for ensuring that
members comply with internal  policies and procedures.  The cost of the services
provided by Thermo Electron to the Thermo Subsidiaries is covered under existing
corporate  services  agreements  between Thermo  Electron and each of the Thermo
Subsidiaries.


                                       25






    The Charter  presently  provides that it shall continue in effect so long as
Thermo Electron and at least one Thermo Subsidiary participates. The Charter may
be amended at any time by agreement of the participants.  Any Thermo Subsidiary,
including the Company,  can withdraw from  participation  in the Charter upon 30
days' prior notice.  In addition,  Thermo  Electron may terminate a subsidiary's
participation in the Charter in the event the subsidiary ceases to be controlled
by Thermo  Electron  or ceases to comply with the  Charter or the  policies  and
procedures  applicable  to the  Thermo  Group.  A  withdrawal  from the  Charter
automatically  terminates the corporate services agreement in effect between the
withdrawing company and Thermo Electron.  The withdrawal from participation does
not terminate  outstanding  commitments to third parties made by the withdrawing
company,  or by Thermo  Electron or other members of the Thermo Group,  prior to
the withdrawal. However, a withdrawing company is required to continue to comply
with all policies and  procedures  applicable to the Thermo Group and to provide
certain  administrative  functions  mandated  by Thermo  Electron so long as the
withdrawing company is controlled by or affiliated with Thermo Electron.

CORPORATE SERVICES AGREEMENT

    As provided in the  Charter,  the Company and Thermo  Electron  have entered
into a Corporate  Services  Agreement  (the  "Services  Agreement")  under which
Thermo  Electron's  corporate staff provides  certain  administrative  services,
including certain legal advice and services,  risk management,  certain employee
benefit administration,  tax advice and preparation of tax returns,  centralized
cash management and financial and other services to the Company. The Company was
assessed  an  annual  fee  equal to 1.2% of the  Company's  revenues  for  these
services for calendar 1995.  Beginning January 1, 1996, the fee has been reduced
to 1.0% of the  Company's  revenues.  The fee is  reviewed  annually  and may be
changed by mutual agreement of the Company and Thermo Electron.  During 1995 and
1996, Thermo Electron assessed the Company $335,000 and $438,000,  respectively,
in fees under the Services Agreement.

    Management  believes  that the  service  fees  charged  under  the  Services
Agreement are reasonable  and that the terms of the Services  Agreement are fair
to the Company. For items such as employee benefit plans, insurance coverage and
other identifiable  costs,  Thermo Electron charges the Company based on charges
directly  attributable  to the  Company.  The Services  Agreement  automatically
renews for successive  one-year  terms,  unless  canceled by the Company upon 30
days' prior  written  notice.  In addition,  the Services  Agreement  terminates
automatically in the event the Company ceases to be a member of the Thermo Group
or ceases to be a participant  in the Charter.  In the event of a termination of
the Services  Agreement,  the Company will be required to pay a termination  fee
equal to the fee that was paid by the Company for  services  under the  Services
Agreement for the nine-month period prior to termination. Following termination,
Thermo Electron may provide certain  administrative  services on an as-requested
basis by the Company or as required in order to meet the  Company's  obligations
under Thermo Electron's policies and procedures. Thermo Electron will charge the
Company a fee equal to the market rate for comparable  services if such services
are provided following termination.



                                       26







                       TRANSACTIONS WITH AFFILIATES

    From time to time, the Company may transact business with other companies in
the Thermo Group. In fiscal 1996, these transactions included the following:

    As of March 29, 1997,  $43,636,000  of the Company's cash  equivalents  were
invested in a repurchase  agreement with Thermo Electron.  Under this agreement,
the  Company  in effect  lends  excess  cash to Thermo  Electron,  which  Thermo
Electron  collateralizes  with investments  principally  consisting of corporate
notes,   United  States  government  agency  securities,   money  market  funds,
commercial  paper,  and other marketable  securities,  in the amount of at least
103% of such obligation. The Company's funds subject to the repurchase agreement
are readily  convertible into cash by the Company and have an original  maturity
of three  months or less.  The  repurchase  agreement  earns a rate based on the
Commercial  Paper  Composite Rate plus 25 basis points,  set at the beginning of
each quarter.

    In January 1996, the Company acquired  Moisture Systems for a total of $21.7
million  in  cash,   including  repayments  of  approximately  $0.7  million  of
indebtedness.  In connection with this  acquisition,  the Company borrowed $21.2
million  from  Thermedics  pursuant to a  promissory  note due March  1998,  and
bearing  interest at the 90-day  Commercial  Paper  Composite Rate plus 25 basis
points,  set at the  beginning of each  quarter.  Thermedics  has  indicated its
intention to require the repayment of the principal  amount of this note only to
the extent that the Company's liquidity and cash flow permit.

    Pursuant to a subcontract entered into in October 1993, the Company performs
research and development services for Coleman Research Corporation  ("Coleman"),
which is the prime  contractor  under a  contract  with the U.S.  Department  of
Energy. Coleman is a wholly owned subsidiary of Thermo Electron and was acquired
by Thermo Electron in March 1995. Coleman paid the Company $829,000 and $619,000
for services rendered in 1995 and 1996, respectively.

    The Company  purchases  an X-ray  source that is used as a component  in its
InScan systems from Trex Medical Corporation, a publicly traded,  majority-owned
subsidiary  of  ThermoTrex  Corporation,  which  is  itself  a  publicly-traded,
majority-owned  subsidiary  of Thermo  Electron.  Each of such X-ray  sources is
purchased  pursuant to written  purchase  orders.  The Company paid Trex Medical
Corporation  $285,000  and  $162,000  under this  arrangement  in 1995 and 1996,
respectively.

    The Company has  subleased  approximately  8,000 square feet of space in its
Chelmsford,  Massachusetts,  facility to Thermo  Cardiosystems  Inc., a publicly
traded, majority-owned subsidiary of Thermedics ("Thermo Cardiosystems"),  under
a two-year sublease agreement.  Under this sublease,  Thermo  Cardiosystems will
pay the Company base rent of $40,000 in the first year and $44,000 in the second
year, in each case,  together with an amount equal to approximately  $33,000 per
year,  representing Thermo  Cardiosystems' pro rata allocation of the facility's
aggregate operating costs, real estate taxes and utilities.

    On March 26,  1996,  the Company  completed a private  placement  of 300,000
shares of Common Stock at a purchase price of $10.00 per share.  On November 19,
1996, the Company completed an additional private placement of 383,500 shares of
Common Stock at a purchase  price of $10.75 per share.  These  shares  together,
less certain shares  previously sold by the Selling  Shareholders,  comprise the
Shares offered pursuant to this Prospectus.  Although  substantially  all of the
Shares sold in such private  placements were purchased by outside investors that
are not affiliated  with the Company,  Thermedics or Thermo  Electron,  Dr. Fine
purchased 10,000 Shares in the March private  placement and Mr. Langan purchased
10,000 Shares in the November private placement,  at prices of $10.00 and $10.75
per share, respectively.


                                       27






                                   MANAGEMENT

    The  Directors  and  executive  officers of the Company and their ages as of
June 30, 1996 are as follows:

<TABLE>
<CAPTION>
                 NAME                    AGE                       POSITION
                 ----                    ---                       --------
<S>                                       <C>  <C>
John W. Wood Jr.                          54   Chairman of the Board and Director
Jeffrey J. Langan                         52   Chief Executive Officer, President and Director
David H. Fine                             54   Senior Vice President
John N. Hatsopoulos                       63   Vice President, Chief Financial Officer and
                                                 Director
Paul F. Kelleher                          54   Chief Accounting Officer
Morton Collins                            61   Director
Matthew C. Weisman                        54   Director
</TABLE>

    All of the Company's  Directors  are elected  annually and hold office until
their respective  successors are elected and qualified.  Executive  officers are
elected annually by the Board of Directors and serve at its discretion.  Messrs.
Wood,  Hatsopoulos  and Kelleher are full-time  employees of Thermo  Electron or
Thermedics,  but these  individuals  devote  such  portions of their time to the
Company's  affairs as the Company's needs reasonably  require from time to time.
While  the  amount  of time  devoted  to the  affairs  of the  Company  by these
individuals  may vary  substantially  from time to time,  the Company  generally
expects that Mr. Wood will devote from 10% to 20% of his time,  and that Messrs.
Hatsopoulos  and Kelleher will devote less than 5% of their time,  respectively,
to the affairs of the Company.

    Mr. Wood has been  Chairman of the Board and  Director of the Company  since
its  inception in 1990.  Mr. Wood also served as the Company's  Chief  Executive
Officer from December 1995 until  December 27, 1996. Mr. Wood has been President
and Chief Executive  Officer of Thermedics  since 1984. Mr. Wood has been Senior
Vice  President of Thermo  Electron  since  December  1995,  and,  prior to that
promotion,  was a Vice  President  of Thermo  Electron  from  September  1994 to
December 1995. Mr. Wood is also a director of Thermedics,  Thermo  Cardiosystems
Inc., Thermo Sentron Inc. and Thermo Voltek Corp.

    Mr. Langan has been President of the Company since April 1996, a Director of
the Company since  November  1996,  and Chief  Executive  Officer of the Company
since December 27, 1996. Prior to joining the Company,  Mr. Langan held a number
of  positions  at  Hewlett-Packard  Company in both its Medical  and  Analytical
Products  Groups.  He served as General  Manager of the  Healthcare  Information
Management  Division,  and also of the Clinical Systems Business Unit within the
Medical  Group.  In the late 1980s,  Mr.  Langan was General  Manager of the Gas
Chromatography/Workstations  Division of  Hewlett-Packard's  Analytical Products
Group. Mr. Langan is also a Vice President of Thermedics.

    Dr. Fine has been Senior Vice  President  of the Company  since 1992 and had
been a Vice President of the Company since its inception in 1990 until 1992. Dr.
Fine joined  Thermo  Electron in 1972 and has held the  following  positions  at
Thermo Electron prior to 1990: Head of the Cancer Research Department,  Director
of Special  Projects for the Research and  Development  Center,  and Manager and
Director of Research for  Instrument  Research  Development.  Dr. Fine is also a
Vice President of Thermedics.

    Mr.  Hatsopoulos has been Vice President and Chief Financial  Officer of the
Company since its inception in 1990 and has been a Director of the Company since
December 1995. Mr. Hatsopoulos was appointed Chairman of the Board of Thermedics
in March 1995, and has served as Thermedics'  Chief Financial Officer since 1988
and its Vice  President  since 1986.  In September  1996,  Mr.  Hatsopoulos  was
appointed  President of Thermo Electron  effective January 1997. Mr. Hatsopoulos
has been the Chief Financial  Officer of Thermo Electron since 1988 and had been
an Executive Vice President of Thermo Electron since 1986. He is also a director
of Thermedics, Thermo Ecotek Corporation,  Thermo Fibergen Inc., Thermo Fibertek
Inc., Thermo Instrument Systems Inc., Thermo Power Corporation, Thermo TerraTech
Inc. and ThermoTrex Corporation.


                                       28





    Mr. Kelleher has been the Chief Accounting  Officer of the Company since its
inception  in 1990.  Mr.  Kelleher  has been Senior Vice  President,  Finance of
Thermo Electron since June 1997, was Vice President,  Finance of Thermo Electron
since  1987 and served as its  Controller  from 1982 to  January  1996.  He is a
director of ThermoLase Corporation.

    Mr.  Collins has been a Director of the Company  since  February  1997.  Mr.
Collins  has been a General  Partner  of DSV  Partners  III,  a venture  capital
limited  partnership,  since 1981 and a General Partner of DSV Management,  Ltd.
since 1982.  Since 1985, DSV Management,  Ltd. has been a General Partner of DSV
Partners  IV, a venture  capital  limited  partnership.  Mr.  Collins  is also a
director of Kopin Corporation,  The Liposome Company, Tandem Computers, Inc. and
ThermoTrex Corporation.

    Mr.  Weisman has been a Director of the Company since May 1997.  Mr. Weisman
has been an  independent  business  consultant  for more  than five  years.  Mr.
Weisman  is also  president  of Cobey  Corporation,  a  consulting  and  private
investment  company.  From 1984 until 1987, Mr. Weisman served on the faculty of
the  Harvard  Business  School,  where he  taught a  course  on  entrepreneurial
management and conducted research on service industries.  From 1969 to 1983, Mr.
Weisman served as president and chief  executive  officer of Executive Air Fleet
Corporation, a worldwide provider of management services for corporate aircraft.
Mr. Weisman is a director of Serologicals, Inc.

COMPENSATION OF DIRECTORS

    Directors who are not employees of the Company, Thermo Electron or any other
companies  affiliated  with  Thermo  Electron  (also  referred  to  as  "outside
directors") receive an annual retainer of $2,000 and a fee of $1,000 per day for
attending  regular  meetings  of the  Board  of  Directors  and $500 per day for
participating  in meetings of the Board of Directors held by means of conference
telephone and for  participating  in certain meetings of committees of the Board
of Directors.  Payment of director fees is made quarterly.  Messrs. Wood, Langan
and Hatsopoulos  are employees of Thermo  Electron  companies and do not receive
any  cash  compensation  from the  Company  for  their  services  as  Directors.
Directors are also reimbursed for reasonable  out-of-pocket expenses incurred in
attending such meetings.

    Directors   Deferred   Compensation   Plan.  Under  the  Company's  Deferred
Compensation Plan for Directors (the "Deferred  Compensation  Plan"), a Director
has the  right to defer  receipt  of his or her fees  until he or she  ceases to
serve as a Director,  dies or retires from his or her principal  occupation.  In
the event of a change in control or  proposed  change in control of the  Company
that is not approved by the Board of Directors,  deferred amounts become payable
immediately. For purposes of the Deferred Compensation Plan, a change of control
is defined as: (a) the  occurrence,  without the prior  approval of the Board of
Directors, of the acquisition,  directly or indirectly,  by any person of 50% or
more  of the  outstanding  Common  Stock  or the  outstanding  common  stock  of
Thermedics or 25% or more of the outstanding  common stock of Thermo Electron or
(b) the failure of the  persons  serving on the Board of  Directors  immediately
prior to any  contested  election of directors  or any exchange  offer or tender
offer for the Common Stock or the common stock of Thermedics or Thermo  Electron
to  constitute a majority of the Board of Directors at any time within two years
following any such event. Amounts deferred pursuant to the Deferred Compensation
Plan are  valued  at the end of each  quarter  as units of  Common  Stock.  When
payable,  amounts  deferred  may be  disbursed  solely in shares of Common Stock
accumulated  under the  Deferred  Compensation  Plan.  The Company has  reserved
25,000  shares  under  this  Plan.  As of March  29,  1997,  no  units  had been
accumulated under the Deferred Compensation Plan.

COMPENSATION OF EXECUTIVE OFFICERS

SUMMARY COMPENSATION TABLE

    The following table  summarizes  compensation for services to the Company in
all capacities  awarded to, earned by or paid to the Company's  Chief  Executive
Officer,  former Chief Executive Officer and one other executive officer for the
fiscal year ended  December 28, 1996 (the Chief  Executive  Officer,  the former
Chief  Executive  Officer and such other  executive  officer  being  hereinafter
referred to as the "Named Executive  Officers").  No other executive  officer of
the Company met the definition of "highly compensated" within the meaning of the
Securities and Exchange  Commission's  executive  compensation  disclosure rules
during this period.


                                       29







    The Company is required to appoint certain executive  officers and full-time
employees of Thermo Electron as executive  officers of the Company in accordance
with the Thermo Electron Corporate Charter. The compensation for these executive
officers is determined and paid entirely by Thermo Electron. The time and effort
devoted by these individuals to the Company's affairs is provided to the Company
under  the  Services   Agreement   between  the  Company  and  Thermo  Electron.
Accordingly,  the  compensation  for these  individuals  is not  reported in the
following table. See "Relationship with Thermo Electron and Thermedics."

                        SUMMARY COMPENSATION TABLE

<TABLE>
<CAPTION>
                                                                            LONG-TERM
                                                  ANNUAL COMPENSATION     COMPENSATION
                                                  -------------------   --------------
                                                                           SECURITIES
                                                                           UNDERLYING
                                                                             OPTIONS
                                                                        (NUMBER OF SHARES      ALL OTHER
          NAME AND PRINCIPAL POSITION             SALARY      BONUS     AND COMPANY)(1)    COMPENSATION(2)
          ---------------------------             ------      -----     ----------------    ----------------
<S>                                              <C>         <C>         <C>                 <C>

John W. Wood Jr.
  Former Chief Executive Officer(3)  .........   $195,000    $172,000                            $6,750
Jeffrey J. Langan                                            $100,000     50,000 (TDX)           $  --
  Chief Executive Officer and President(4)  ..   $165,000                 75,000 (TMD)
                                                                          15,000 (TMO)
David H. Fine                                    $128,000    $ 45,000     20,000 (TDX)           $6,381
  Senior Vice President  ......................                            3,000 (TMD)
                                                                           1,950 (TMO)
                                                                           7,500 (TSR)
                                                                          30,000 (TLZ)

</TABLE>



(1)  In addition to receiving  options to purchase  Common Stock  (designated in
     the table as TDX),  Mr.  Langan and Dr. Fine have been  granted  options to
     purchase  the  common  stock of Thermo  Electron  and  certain of its other
     subsidiaries as part of Thermo  Electron's  stock option  program.  Options
     have been  granted  during the last  fiscal  year in the  following  Thermo
     Electron  companies:  Thermedics  (designated in the table as TMD),  Thermo
     Electron  (designated in the table as TMO), Thermo Sentron Inc. (designated
     in the table as TSR) and ThermoLase Corporation (designated in the table as
     TLZ).

(2)  Represents the amount of matching  contributions  made by the  individual's
     employer  on behalf  of the  Named  Executive  Officers  under  the  Thermo
     Electron 401(k) plan.

(3)  Mr. Wood is a senior vice  president of Thermo  Electron and the  president
     and chief executive officer of Thermedics, and also served as the Company's
     chief  executive  officer  until  December 27, 1996.  Reported in the table
     under "Annual  Compensation" and "All Other Compensation" are total amounts
     paid to Mr.  Wood for his  service  in all  capacities  to Thermo  Electron
     companies.  The total annual compensation paid to Mr. Wood from all sources
     within the Thermo  Electron  organization  is allocated among the companies
     based on the time he  devotes  to their  businesses.  For 1996,  50% of Mr.
     Wood's annual  compensation  was allocated to Thermedics,  and included his
     managerial  assignment on behalf of the Company.  None of Mr. Wood's annual
     compensation in 1996 was separately allocated to or paid by the Company. In
     addition,  Mr. Wood has been  granted  options to purchase  common stock of
     Thermo Electron and certain of its subsidiaries other than the Company from
     time to time by Thermo Electron or such other  subsidiaries.  These options
     are not reported here as they were granted as  compensation  for service to
     Thermo Electron companies in capacities other than in his capacity as chief
     executive officer of the Company.

(4)  Mr.  Langan was  appointed  President  of the  Company on April 2, 1996 and
     Chief Executive Officer on December 27, 1996.


                                       30





STOCK OPTIONS GRANTED DURING FISCAL 1996

    The following  table sets forth  certain  information  concerning  grants of
stock  options by the Company and other Thermo  Electron  companies  made during
fiscal 1996 to the Named  Executive  Officers.  No options to purchase shares of
the Common Stock of the Company were granted to Mr. Wood during  fiscal 1996. It
has not been the  Company's  policy  in the  past to  grant  stock  appreciation
rights, and no such rights were granted during fiscal 1996.

                       OPTION GRANTS IN LAST FISCAL YEAR


<TABLE>
<CAPTION>
                                                                                      
                                                                                      
                                                                                      
                                                                                      
                                                                                       POTENTIAL REALIZABLE 
                                                                                         VALUE AT ASSUMED   
                              NUMBER OF      PERCENT OF                                ANNUAL RATES OF STOCK
                               SHARES       TOTAL OPTIONS                             PRICE APPRECIATION FOR
                             UNDERLYING      GRANTED TO     EXERCISE                      OPTION TERM(2)   
                               OPTIONS      EMPLOYEES IN    PRICE PER   EXPIRATION        ---------------   
          NAME               GRANTED(1)     FISCAL YEAR      SHARE        DATE          5%           10%
          ----               -----------     -----------      -----        ----          --           ---
<S>                          <C>             <C>             <C>         <C>         <C>          <C>
John W. Wood Jr.(3)          5,400 (TMD)            1.6%     $28.13      02/09/99    $   23,922   $    50,274
                            30,000 (TSR)            5.8%     $14.00      03/01/08    $  334,200   $   898,200
                             2,100 (TVL)            1.5%     $12.78      03/07/01    $    4,221   $     8,883
                             3,000 (TMO)            0.2%     $42.79      05/22/99    $   20,220   $    42,480
                            37,500 (TMO)            2.4%     $40.63      04/03/08    $1,212,750   $ 3,258,000
                             5,000 (TBA)            0.6%     $10.00      03/11/08    $   39,800   $   106,900
                            10,000 (TFG)            1.8%     $10.00      09/12/08    $   79,600   $   213,800
                            15,000 (TOC)            0.5%     $12.00      04/09/08    $  143,250   $   384,900
                             5,000 (LYTE)           1.4%     $10.00      03/11/08    $   39,800   $   106,900
                            15,000 (TMQ)            0.5%     $13.00      03/11/08    $  155,250   $   417,000
                            20,000 (TXM)            1.0%     $11.00      03/11/08    $  175,000   $   470,400
Jeffrey J. Langan           50,000 (TDX)           24.2%     $10.00      04/02/06    $  314,500   $   797,000
                            75,000 (TMD)        22.9%(4)     $28.13      04/02/03    $  858,750   $ 2,001,750
                            15,000 (TMO)         1.0%(4)     $42.79      05/22/03    $  261,300   $   609,000
David H. Fine               20,000 (TDX)            9.7%     $10.75      12/17/06    $  135,200   $   342,600
                             3,000 (TMD)         0.9%(4)     $28.13      02/09/99    $   13,290   $    27,930
                             1,950 (TMO)         0.1%(4)     $42.79      05/22/99    $   13,143   $    27,612
                             7,500 (TSR)         1.5%(4)     $14.00      02/09/08    $   83,550   $   224,500
                            30,000 (TLZ)      7.5%(4)(5)     $23.55      09/12/08    $  562,200   $ 1,510,800


</TABLE>


(1)  The options to purchase shares of the Company's Common Stock (designated in
     the table as TDX) and shares of the common stock of Thermedics  (designated
     in the table as TMD),  Thermo  Electron  (designated  in the table as TMO),
     Thermo Sentron Inc.  (designated in the table as TSR),  Thermo Voltek Corp.
     (designated  in  the  table  as  TVL),   Thermo   BioAnalysis   Corporation
     (designated in the table as TBA),  Thermo Fibergen Inc.  (designated in the
     table as TFG),


                                       31






     Thermo  Optek  Corporation  (designated  in the table as TOC),  ThermoQuest
     Corporation  (designated  in the table as TMQ),  Trex  Medical  Corporation
     (designated in the table as TXM) and ThermoLase Corporation  (designated in
     the  table  as TLZ) are  immediately  exercisable,  while  the  options  to
     purchase shares of the common stock of ThermoLyte  Corporation  (designated
     in the table as LYTE) are not exercisable  until the earlier of (i) 90 days
     after the  effective  date of the  registration  of such common stock under
     Section 12 of the Exchange Act and (ii) nine years after the grant date. In
     all cases,  the shares  acquired upon exercise are subject to repurchase by
     the granting corporation at the exercise price if the optionee ceases to be
     employed by the granting  corporation or another Thermo  Electron  company.
     The granting  corporation  may exercise its  repurchase  rights  within six
     months after the termination of the optionee's  employment.  The repurchase
     rights generally lapse ratably over a five- to ten-year  period,  depending
     on the option term, which may vary from seven to twelve years, provided the
     optionee continues to be employed by the Company or another Thermo Electron
     company.  Certain  options  granted  as a part of Thermo  Electron's  stock
     option program have three-year  terms,  and the repurchase  rights lapse in
     their  entirety  on the second  anniversary  of the grant  date.  As to the
     options to purchase shares of Common Stock, the repurchase  rights lapse in
     their  entirety  on the ninth  anniversary  of the grant  date,  unless the
     Common Stock becomes  publicly-traded  before that date, in which event the
     repurchase  rights are deemed to have lapsed 20% per year commencing on the
     first  anniversary of the grant date. The granting  corporation  may permit
     the holders of all options to exercise  options and satisfy tax withholding
     obligations  by  surrendering  shares  equal  in fair  market  value to the
     exercise price or withholding obligation.

(2)  The amounts shown on this table represent  hypothetical gains that could be
     achieved for the  respective  options if exercised at the end of the option
     term.  These gains are based on assumed rates of stock  appreciation  of 5%
     and 10%,  compounded  annually  from the date the  respective  options were
     granted to their  expiration  date.  The gains  shown are net of the option
     exercise price,  but do not include  deductions for taxes or other expenses
     associated  with the  exercise.  Actual  gains,  if any,  on  stock  option
     exercises will depend on the future  performance  of the underlying  Common
     Stock, the  optionholders'  continued  employment through the option period
     and the date on which the options are exercised.

(3)  Mr.  Wood has also served as an officer of Thermo  Electron  since 1994 and
     the chief executive  officer of Thermedics  since 1984 and has been granted
     options to purchase  common  stock of Thermo  Electron  (designated  in the
     table as TMO) and  certain  of its  subsidiaries  other  than the  Company,
     including the common stock of Thermedics  (designated in the table as TMD),
     Thermo Sentron Inc.  (designated in the table as TSR),  Thermo Voltek Corp.
     (designated  in  the  table  as  TVL),   Thermo   BioAnalysis   Corporation
     (designated in the table as TBA),  Thermo Fibergen Inc.  (designated in the
     table as TFG), Thermo Optek  Corporation  (designated in the table as TOC),
     ThermoLyte  Corporation  (designated  in the  table as  LYTE),  ThermoQuest
     Corporation  (designated in the table as TMQ) and Trex Medical  Corporation
     (designated   in  the  table  as  TXM).   These  options  were  granted  as
     compensation  for service to other Thermo Electron  companies in capacities
     other than his capacity as the chief executive officer of the Company. Each
     of these options was granted under stock option plans  maintained by Thermo
     Electron  and,  accordingly,  are reported as a percentage of total options
     granted to employees of Thermo Electron and its subsidiaries.

(4)  These  options were granted  under stock option plans  maintained by Thermo
     Electron  or  its  public   subsidiaries  as  part  of  Thermo   Electron's
     compensation  program and,  accordingly,  are  reported as a percentage  of
     total  options  granted  to  employees  of Thermo  Electron  and its public
     subsidiaries.

(5)  The  options  to  purchase   shares  of  the  common  stock  of  ThermoLase
     Corporation  granted to Dr. Fine are subject to the same terms as described
     in  footnote (1), except that the repurchase rights are deemed to lapse 20%
     per year commencing on the sixth anniversary of the grant date.


                                       32






STOCK OPTIONS EXERCISED DURING FISCAL YEAR 1996 AND FISCAL YEAR-END OPTION
VALUES

    The following table sets forth certain information  concerning each exercise
of a stock option during fiscal 1996 and  outstanding  stock options held at the
end of fiscal 1996 by the Named Executive Officers. No stock appreciation rights
were exercised or outstanding during fiscal 1996.

            AGGREGATED OPTION EXERCISES IN LAST FISCAL YEAR AND
                       FISCAL YEAR-END OPTION VALUES
<TABLE>
<CAPTION>
                                                                               NUMBER OF             VALUE OF
                                                                              UNEXERCISED           UNEXERCISED
                                                                              OPTIONS AT           IN-THE-MONEY
                                                    SHARES                  FISCAL YEAR-END           OPTIONS
                                                   ACQUIRED      VALUE       (EXERCISABLE/         (EXERCISABLE/
        NAME                   COMPANY            ON EXERCISE   REALIZED   UNEXERCISABLE)(1)      UNEXERCISABLE)
        ----                   -------            -----------   --------   -----------------      --------------

<S>                   <C>                         <C>           <C>        <C>                    <C>
John W. Wood Jr.(2)   Thermedics Detection(4)         --           --            0/23,333            $0/$268,330(3)

Jeffrey J. Langan     Thermedics Detection            --           --            0/50,000            $0/$575,000(3)
                      Thermedics                      --           --       75,000/0                 $0/$0
                      Thermo Electron                 --           --       15,000/0                 $0/$0

David H. Fine         Thermedics Detection(4)         --           --            0/61,667            $0/$709,171(3)
                      Thermedics                      --           --       87,600/0           $616,979/$0
                      Thermo Cardiosystems          2,445       103,546      1,530/0            $42,229/$0
                      Thermo Ecotek                   --           --        1,500/0            $17,625/$0
                      Thermo Electron(5)            3,038       114,098     54,637/0           $956,232/$0
                      Thermo Fibertek                 --           --        4,500/0            $27,000/$0
                      Thermo Sentron                  --           --        7,500/0                 $0/$0
                      ThermoLase(6)                   --           --       30,000/0                 $0/$0
                      ThermoSpectra                   --           --        1,000/0             $1,875/$0
                      ThermoTrex                      360        17,838           --                    --

</TABLE>


(1)  All of the options reported  outstanding at the end of the fiscal year were
     immediately  exercisable,  except the options to purchase  shares of Common
     Stock which were not  exercisable  until May 22,  1997.  In all cases,  the
     shares  acquired  upon  exercise of the  options  reported in the table are
     subject to repurchase by the granting  corporation at the exercise price if
     the optionee  ceases to be employed by such  corporation  or another Thermo
     Electron  company.  The granting  corporation  may exercise its  repurchase
     rights  within  six  months  after  the   termination   of  the  optionee's
     employment.  For  companies  whose  shares  are not  publicly  traded,  the
     purchase  rights lapse in their  entirety on the ninth  anniversary  of the
     grant date. For publicly traded companies,  the repurchase rights generally
     lapse ratably over a five to ten year period, depending on the option term,
     which  may vary from  seven to twelve  years,  provided  that the  optionee
     continues  to be employed by the  granting  corporation  or another  Thermo
     Electron  company.  Certain options granted as a part of Thermo  Electron's
     stock option program have three-year terms, and the repurchase rights lapse
     in their entirety on the second anniversary of the grant date.

(2)  Mr. Wood also holds unexercised  options to purchase common stock of Thermo
     Electron and its subsidiaries other than the Company. These options are not
     reported  here as they were  granted as  compensation  for service to other
     Thermo  Electron  companies in capacities  other than his capacity as chief
     executive officer of the Company.

(3)  No public  market  existed  for the  shares  underlying  the  options as of
     December 28, 1996. Accordingly, this value has been calculated on the basis
     of an  assumed  market  value of $11.50 per  share,  which was the  initial
     public offering price of the Common Stock.

(4)  Options to purchase 23,333 and 41,667 shares of Common Stock granted to Mr.
     Wood  and  Dr. Fine, respectively, were granted pursuant to a  nonqualified
     stock option plan of Thermedics.

(5)  Options to purchase  45,000  shares of the common stock of Thermo  Electron
     granted to Dr.  Fine are  subject to the same terms  described  in footnote
     (1),  except  that  the  repurchase  rights  of  the  granting  corporation
     generally do not lapse until the tenth  anniversary  of the grant date.  In
     the event of the employee's death or involuntary  termination  prior to the
     tenth  anniversary of the grant date, the repurchase rights of the granting
     corporation  shall be deemed to have lapsed ratably over a five-year period
     commencing with the fifth anniversary of the grant date.

(6)  The  options  to  purchase   shares  of  the  common  stock  of  ThermoLase
     Corporation  granted to Dr. Fine are subject to the same terms described in
     footnote  (1),  except  the  repurchase  rights are deemed to lapse 20% per
     year commencing on the sixth anniversary of the grant date.


                                       33






      SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT


PRINCIPAL STOCKHOLDER

    The following table sets forth certain information  regarding the beneficial
ownership  of the Common Stock as of June 30, 1997 by  Thermedics,  which is the
only person or entity  that owns  beneficially  more than 5% of the  outstanding
shares of Common Stock. See "Risk Factors -- Control by Thermedics."

<TABLE>
<CAPTION>
                                                     NUMBER OF SHARES    PERCENTAGE OF OUTSTANDING
      NAME AND ADDRESS OF BENEFICIAL OWNER          BENEFICIALLY OWNED   SHARES BENEFICIALLY OWNED
      ------------------------------------          ------------------   -------------------------
<S>                                                     <C>                   <C>
Thermedics Inc.(1) ..............................        9,992,400             74.8%
  470 Wildwood Street
  Woburn, Massachusetts 01888
</TABLE>


(l) Thermedics is a majority-owned subsidiary of Thermo Electron and, therefore,
    Thermo  Electron  may be deemed a  beneficial  owner of the shares of Common
    Stock beneficially owned by Thermedics. Thermo Electron disclaims beneficial
    ownership of these shares.

    Thermedics  has adopted a stock option plan with respect to the Common Stock
that it beneficially  owns.  Under this plan,  options to purchase up to 333,333
shares of such stock may be granted to any person  within the  discretion of the
human  resources  committee of the Board of Directors of  Thermedics,  including
officers and key employees of Thermedics.

MANAGEMENT

    The following table sets forth certain information  regarding the beneficial
ownership  of the  Common  Stock  as of June  30,  1997  as well as  information
regarding the beneficial  ownership of the common stock of Thermedics and Thermo
Electron,  as of June  30,  1997,  with  respect  to (i)  each of the  Company's
Directors,  (ii) each executive officer named in the summary  compensation table
above, and (iii) all Directors and executive officers of the Company as a group.

<TABLE>
<CAPTION>
                                                        THERMEDICS                           THERMO ELECTRON
                       NAME                         DETECTION INC.(2)   THERMEDICS INC.(3)    CORPORATION(4)
                       ----                         -----------------   ------------------    --------------
<S>                                                 <C>                 <C>                   <C>
John W. Wood Jr.                                          47,854              179,049              265,999
Jeffrey J. Langan                                        113,660               90,000               35,429
David H. Fine                                            101,667              114,068               73,986
John N. Hatsopoulos                                       21,262               64,495              632,768
Morton Collins                                            20,000                    0                    0
Matthew C. Weisman                                        20,000                    0                    0
All Directors and executive officers as a group
  (7) persons                                            334,543              467,837            1,143,676

</TABLE>

(l)  Except as reflected in the footnotes to this table,  shares of Common Stock
     and common  stock of  Thermedics  and Thermo  Electron  beneficially  owned
     consist of shares owned by the  indicated  person or by that person for the
     benefit of minor children, and all share ownership involves sole voting and
     investment power.

(2)  Shares of Common Stock  beneficially  owned by Mr. Wood,  Mr.  Langan,  Mr.
     Hatsopoulos,  Dr. Fine, Mr.  Collins,  Mr. Weisman and by all Directors and
     executive  officers as a group include  43,333,  100,000,  20,000,  91,667,
     20,000, 20,000 and 300,000 shares, respectively,  that such person or group
     has the right to  acquire  within  60 days of June 30,  1997,  through  the
     exercise of stock options.  No Director or executive  officer  beneficially
     owned more than 1% of the Common Stock outstanding as of June 30, 1997; and
     all  directors  and  executive  officers  as  a  group  beneficially  owned
     approximately 2.4% of the Common Stock outstanding as of such date.


                                       34






(3)  Shares of the common stock of  Thermedics  beneficially  owned by Mr. Wood,
     Mr. Langan,  Mr.  Hatsopoulos,  Dr. Fine and by all Directors and executive
     officers as a group include  130,700,  90,000,  50,000,  91,100 and 380,800
     shares,  respectively,  that such  person or group has the right to acquire
     within 60 days of June 30,  1997,  through the  exercise of stock  options.
     Shares  beneficially  owned by Mr.  Hatsopoulos  and by all  Directors  and
     executive  officers  as a  group  include  1,602  and  2,761  full  shares,
     respectively,  allocated through June 30, 1997 to their respective accounts
     maintained  pursuant to Thermo Electron's  Employee Stock Ownership Plan of
     which  the  trustees,  who  have  investment  power  over its  assets,  are
     executive  officers of Thermo  Electron (the "ESOP").  Shares  beneficially
     owned by Mr. Wood include  2,600 shares held in a trust of which Mr. Wood's
     spouse is the trustee. No director or executive officer  beneficially owned
     more than 1% of the common stock of Thermedics  outstanding  as of June 30,
     1997; all Directors and executive  officers as a group  beneficially  owned
     approximately 1.3% of such common stock outstanding as of such date.

(4)  The shares of common stock of Thermo Electron have been adjusted to reflect
     a three-for-two stock split effected in the form of a 50% stock dividend on
     May 22, 1996.  Shares of the common stock of Thermo  Electron  beneficially
     owned  by Mr.  Wood,  Mr.  Langan,  Mr.  Hatsopoulos,  Dr.  Fine and by all
     Directors  and  executive  officers  as a group  include  230,458,  35,100,
     535,685, 56,537 and 952,917 shares, respectively, that such person or group
     has the right to  acquire  within  60 days of June 30,  1997,  through  the
     exercise of stock options. Shares beneficially owned by Mr. Hatsopoulos and
     by all Directors and executive  officers as a group include 1,934 and 3,258
     full  shares,  respectively,  allocated  through  June  30,  1997 to  their
     respective  accounts  maintained  pursuant  to the  ESOP.  No  director  or
     executive  officer  beneficially  owned more than 1% of the common stock of
     Thermo  Electron  outstanding  as of  June  30,  1997;  all  Directors  and
     executive  officers  as a group  beneficially  owned  less  than 1% of such
     common stock outstanding as of such date.


STOCK HOLDING ASSISTANCE PLAN

    The  Company has  adopted a stock  holding  policy  which  requires  certain
executives  of the  Company  to acquire  and hold a minimum  number of shares of
Common Stock.  In order to assist the  executives in complying  with the policy,
the Company also adopted a Stock  Holding  Assistance  Plan,  under which it may
make  interest-free  loans  to  certain  individuals,  including  the  executive
officers  identified under the caption  "Management -- Compensation of Executive
Officers," elsewhere in this Prospectus,  to enable such individuals to purchase
the Company's Common Stock in the open market. No such loans were outstanding as
of March 29, 1997.



                                       35






                           SELLING SHAREHOLDERS

    The following  table sets forth the names of the Selling  Shareholders,  the
number of shares of Common Stock owned by each Selling  Shareholder,  the number
of Shares  that may be  offered by each  Selling  Shareholder  pursuant  to this
Prospectus,  and the number of Shares each  Selling  Shareholder  will own after
completion of the offering,  assuming all of the Shares being offered hereby are
sold.

<TABLE>
<CAPTION>
                                                           SHARES OF
                                                          COMMON STOCK                   SHARES OWNED
                                                             OWNED                           AFTER
                                                          PRIOR TO THE   SHARES BEING     COMPLETION
                  SELLING SHAREHOLDER                     OFFERING(1)      OFFERED      OF THE OFFERING
                  -------------------                     -----------      -------      ---------------
<S>                                                        <C>              <C>          <C>
Craig Drill Capital L.P.                                     80,000         80,000                0
Awad & Associates L.P.                                        5,000          5,000                0
Richard B. Felder                                             5,000          5,000                0
Richard B. Felder c/f Jeffrey D. Felder                       2,500          2,500                0
Richard B. Felder c/f Jonathan D. Felder                      2,500          2,500                0
Mark Cahill                                                   2,500          2,500                0
Georgia Veru                                                  2,500          2,500                0
Michael D. Mintz Trust u/a 8/12/92                           11,500         10,000            1,500
Martin Walsh                                                 10,000         10,000                0
Crescent International Holdings Limited(2)                   50,000         50,000                0
David H. Fine(3)                                            101,667         10,000           91,667
Bear Stearns                                                 80,000         80,000                0
Universal Partners, L.P.                                     10,000         10,000                0
Alan J. Rubin                                                10,000         10,000                0
Rush & Co.                                                   55,000         55,000                0
Hartley Bernstein                                             5,000          5,000                0
William C. Bartholomay                                       10,000         10,000                0
Paul A. Berkman & Judith M. Berkman, JTWROS                   5,000          5,000                0
Richard J. & Christine S. Cowgill                             5,000          5,000                0
Harvey Greenfield                                             5,000          5,000                0
James W. Jacobs                                              10,000         10,000                0
Ronald M. Krinick                                            10,000         10,000                0
Jeffrey J. Langan(4)                                        113,660         10,000          103,660
Nadia One, Inc.                                              10,000         10,000                0
WNC Corporation                                              50,000         50,000                0
Randolph K. Pace                                             20,000         20,000                0
Pilot Trading Trust                                           9,000          9,000                0
Dr. Martin R. Post MD PC Retirement Trust dtd 9/1/84          2,500          2,500                0
Edward Raskin, Ttee FBO Edward Raskin u/a/d 10/14/94          5,000          5,000                0
Jiela Rufeh                                                   2,500          2,500                0
Bejan Rufeh                                                   2,500          2,500                0
Seema Sachdeva & Rakesh Sachdeva                              5,000          5,000                0
Michael & Dafna Schmerin                                      2,500          2,500                0
Joel Schoenfeld                                               2,500          2,500                0


                                       36






Hans Schopper                                                25,000         25,000                0
Allenstown Investment Partners                               10,000         10,000                0
Carico, Inc.                                                  5,000          5,000                0
Martin D. Cohn and Gerald L. Cohn, Trustees for Gerald L.
  Cohn                                                       25,000         25,000                0
Hannah S. and Samuel A. Cohn Memorial Foundation              5,000          5,000                0
Cynthia J. Cohn Revocable Trust                               5,000          5,000                0
Ekistics Corp.                                               10,000         10,000                0
Richard Harriton                                             10,000         10,000                0
M.D. Funding, Inc.                                           10,000         10,000                0
Mid-Lakes Profit Sharing Trust                               10,000         10,000                0
Bruce E. Toll                                                20,000         20,000                0
Tracy M. Cirillo(5)                                           1,000          1,000                0
Francis X. O'Brien                                            1,366          1,000              366
  Total                                                     840,693        643,500          197,193

</TABLE>

(1)  Except as  otherwise  reflected in the  footnotes to this table,  all share
     ownership includes Shares owned by the Selling Shareholders and shares that
     the Selling  Shareholders  have the right to acquire within 60 days of June
     30, 1997, through the exercise of stock options.

(2)  Crescent  International  Holdings  Limited is a wholly owned  subsidiary of
     Crescent Holding GmbH, which is indirectly controlled by Suliman S. Olayan,
     the father of Hutham S. Olayan, a director of Thermo  Electron.  Ms. Olayan
     disclaims   beneficial   ownership   of  the  Shares   owned  by   Crescent
     International Holdings Limited.

(3)  Dr. Fine is Senior Vice  President of the  Company.  See  "Management"  and
     "Security Ownership of Certain Beneficial Owners and Management."

(4)  Mr.  Langan is Chief  Executive  Officer,  President  and a Director of the
     Company.  See  "Management" and "Security  Ownership of Certain  Beneficial
     Owners and Management."

(5)  Ms. Cirillo is an employee of the Company.


    The Shares are being  registered to permit public  secondary  trading of the
Shares from time to time by the Selling  Shareholders.  All of the Shares  being
offered  by the  Selling  Shareholders  were  sold  by the  Company  in  private
placement  transactions  pursuant to Stock Purchase  Agreements with the Company
dated March 26, 1996 and November 19, 1996 (the "Purchase Agreements") for cash.

    In the Purchase  Agreements,  the Company agree, among other things, to bear
all expenses (other than underwriting discounts,  selling commissions,  and fees
and  expenses of counsel and other  advisors  to the  Selling  Shareholders)  in
connection  with the  registration  and sale of the Shares being  offered by the
Selling  Shareholders.  See "Sale of Shares." The Company intends to prepare and
file such amendments and supplements to the Registration Statement of which this
Prospectus forms a part as may be necessary to keep the  Registration  Statement
effective  until all the Shares  registered  thereunder  have been sold pursuant
thereto  or  until,  by  reason  of Rule  144(k)  of the  Commission  under  the
Securities  Act or any other  rule of similar  effect,  the Shares are no longer
required to be registered for the sale thereof by the Selling Shareholders.


                                       37





                                 SALE OF SHARES

    The Company will not receive any of the  proceeds  from this  offering.  The
Shares offered hereby may be sold from time to time by or for the account of any
of the  Selling  Shareholders  or by their  pledgees,  donees,  distributees  or
transferees  or other  successors in interest to the Selling  Shareholders.  The
Shares may be sold hereunder directly to purchasers by the Selling  Shareholders
in  negotiated  transactions;  by or through  brokers  or  dealers  in  ordinary
brokerage  transactions or transactions in which the broker solicits  purchases;
block  trades in which the broker or dealer will attempt to sell Shares as agent
but may position and resell a portion of the block as principal; transactions in
which a broker or dealer  purchases as principal for resale for its own account;
or through  underwriters  or agents.  The Shares may be sold at a fixed offering
price, which may be changed, at the prevailing market price at the time of sale,
at prices related to such prevailing market price or at negotiated  prices.  Any
brokers,  dealers,  underwriters or agents may arrange for others to participate
in any such  transaction and may receive  compensation in the form of discounts,
commissions or concessions from the Selling  Shareholders  and/or the purchasers
of the Shares.  Each Selling  Shareholder will be responsible for payment of any
and all commissions to brokers.

    The  aggregate  proceeds  to any  Selling  Shareholder  from the sale of the
Shares  offered  hereby  will be the  purchase  price  of such  Shares  less any
broker's commission.

    In  order  to  comply  with  the  securities  laws  of  certain  states,  if
applicable,  the  Shares  will  be  sold  in  such  jurisdictions  only  through
registered or licensed  brokers or dealers.  In addition,  in certain states the
Shares may not be sold unless they have been registered or qualified for sale in
the applicable  state or an exemption  from the  registration  or  qualification
requirement is available and is complied with.

    Any Selling Shareholder and any broker-dealer, agent or underwriter who acts
in  connection  with  the  sale  of  Shares  hereunder  may be  deemed  to be an
"underwriter" as that term is defined in the Securities Act, and any commissions
received  by them and profit on any resale of the Shares as  principal  might be
deemed to be underwriting  discounts and  commissions  under the Securities Act.
The Company has agreed to  indemnify  the Selling  Shareholder  against  certain
liabilities,  including  liabilities under the Securities Act as underwriters or
otherwise.

                          DESCRIPTION OF CAPITAL STOCK

    The following is a brief  description of the principal  terms  applicable to
the authorized shares of Common Stock.

    As of the date of this  Prospectus,  the  Company had  50,000,000  shares of
Common  Stock  authorized  for  issuance,  of which  13,354,792  were issued and
outstanding. Each share of Common Stock is entitled to pro rata participation in
distributions  upon  liquidation  and to one vote on all matters  submitted to a
vote of shareholders.  Dividends may be paid to the holders of Common Stock when
and if  declared  by the  Board  of  Directors  out of funds  legally  available
therefor. Holders of Common Stock have no preemptive, subscription,  redemption,
conversion or similar rights.  The  outstanding  shares of Common Stock are, and
the shares offered hereby when issued will be,  legally  issued,  fully paid and
nonassessable.

    The shares of Common Stock have  noncumulative  voting rights.  As a result,
the holders of more than 50% of the shares voting can elect all the directors if
they so choose,  and in such event,  the holders of the remaining  shares cannot
elect any directors. Thermedics intends to continue to beneficially own at least
a majority of the outstanding Common Stock, and will have the power to elect all
of  the  members  of  the  Company's   Board  of  Directors.   Thermedics  is  a
majority-owned subsidiary of Thermo Electron and, therefore, Thermo Electron may
be deemed a beneficial owner of the shares of Common Stock beneficially owned by
Thermedics. Thermo Electron disclaims beneficial ownership of these shares.

    The  Company's  Articles  of  Organization,   as  amended,  contain  certain
provisions  permitted under the Business  Corporation Law of the Commonwealth of
Massachusetts relating to the liability of directors. These provisions eliminate
a  director's  liability  for monetary  damages for a breach of 


                                       38






fiduciary duty, except in certain circumstances involving wrongful acts, such as
the breach of a director's  duty of loyalty or acts or omissions  which  involve
intentional misconduct or a knowing violation of law. The Company's By-Laws also
contains  provisions  to indemnify  the directors and officers of the Company to
the fullest extent permitted by the Business Corporation Law of the Commonwealth
of  Massachusetts.  The Company  believes that these  provisions will assist the
Company in attracting and retaining qualified  individuals to serve as directors
and officers.

    The transfer  agent and  registrar  for the Common  Stock is American  Stock
Transfer & Trust Company.

                         SHARES ELIGIBLE FOR FUTURE SALE

    There are currently 13,354,792 shares of Common Stock outstanding,  of which
3,362,392 are freely tradeable without restriction or further registration under
the  Securities  Act,  except that any shares  purchased  by  affiliates  of the
Company,  as that  term is  defined  in Rule 144 under  the  Securities  Act (an
"Affiliate"),  may  generally  only be  resold  in  compliance  with  applicable
provisions of Rule 144.

    The remaining  9,992,400 shares of Common Stock are owned by Thermedics.  In
connection with the Company's  initial public  offering,  which was completed on
March 26, 1997, Thermo Electron, Thermedics and the Company have agreed, without
the  prior  written  consent  of the  Representatives  of  underwriters  of such
offering,  not to offer, sell or otherwise dispose of any shares of Common Stock
prior to August 20, 1997,  other than (i) the issuance of shares of Common Stock
to be issued in such offering,  (ii) the issuance of options and sales of shares
of Common  Stock  pursuant to existing  stock-based  compensation  plans,  (iii)
shares of Common Stock which may be sold to Thermedics  and Thermo  Electron and
(iv) the issuance of shares of Common Stock as consideration for the acquisition
of one or more  businesses  (provided  that such Common  Stock may not be resold
prior to August 20, 1997.  So long as  Thermedics is able to elect a majority of
the  Board of  Directors  it will be able to cause  the  Company  at any time to
register  under the Securities Act all or a portion of the Common Stock owned by
Thermedics or its affiliates, in which case it would be able to sell such shares
without restriction upon effectiveness of the registration statement.

    In general, under Rule 144 as currently in effect, a stockholder,  including
an Affiliate,  who has beneficially  owned his or her restricted  securities (as
that  term is  defined  in Rule 144) for at least one year from the later of the
date such  securities were acquired from the Company or (if applicable) the date
they were acquired from an Affiliate is entitled to sell, within any three-month
period,  a number of such  shares  that does not exceed the greater of (i) 1% of
the then  outstanding  shares of Common Stock or (ii) the average weekly trading
volume in the Common Stock during the four calendar weeks  preceding the date on
which  notice of such  sale was  filed  pursuant  to Rule 144  provided  certain
requirements concerning  availability of public information,  manner of sale and
notice of sale are satisfied. In addition,  under Rule 144(k), if a period of at
least two years has elapsed between the later of the date restricted  securities
were  acquired from the Company or (if  applicable)  the date they were acquired
from an Affiliate of the Company,  a stockholder  who is not an Affiliate of the
Company at the time of sale and has not been an  Affiliate of the Company for at
least three months prior to the sale is entitled to sell the shares  immediately
without compliance with the foregoing requirements under Rule 144.

    The Company had reserved 358,333 shares of Common Stock for grants under its
existing  stock-based  compensation plans as of March 29, 1997. As of such date,
options to purchase up to 216,849  shares of Common Stock had been granted under
such  plans.  All such  options  are  exercisable,  subject  to the right of the
Company to repurchase  shares at the exercise price if the optionee ceases to be
employed by the Company or another  Thermo  Electron  company.  This  repurchase
right  lapses  ratably  (on an  annual  basis)  over a five to ten  year  period
depending upon the term of the option.  The Company has registered all shares of
Common Stock issuable under such plans under the  Securities  Act.  Accordingly,
shares  issuable  under  these  plans that are not  subject  to  transferability
restrictions are eligible for sale in the public market immediately,  subject to
Rule 144 limitations applicable to Affiliates as noted above.



                                       39





                                 LEGAL OPINION

    The  validity of the  issuance of the Common  Stock  offered  hereby will be
passed  upon for the  Company by Seth H.  Hoogasian,  Esq.,  General  Counsel of
Thermo Electron, Thermedics and the Company. Mr. Hoogasian owns or has the right
to  acquire  5,000  shares  of Common  Stock,  8,900  shares of common  stock of
Thermedics and 107,558 shares of common stock of Thermo Electron.

                                  EXPERTS

    The  Consolidated   Financial   Statements  of  the  Company,   (except  the
Consolidated  Financial  Statements of Rutter & Co. B.V. as of December 28, 1996
and for the period from January 25, 1996 (date of  acquisition)  to December 28,
1996), and the Combined Financial Statements of Moisture Systems Corporation and
Moisture Systems Limited  included in this prospectus and the related  financial
statement  schedule  included  in  the  Registration  Statement  of  which  this
Prospectus  forms a part have been audited by Arthur  Andersen LLP,  independent
public  accountants,  to the extent and for the  periods as  indicated  in their
reports with respect thereto. The Consolidated  Financial Statements of Rutter &
Co.  B.V. as of  December  28, 1996 and for the period from  January 25, 1996 to
December 28, 1996 have been audited by Deloitte & Touche,  independent  auditors
and  registeraccountants,  as  stated  in  their  report  included  herein.  The
consolidated  financial  statements  and  financial  statement  schedule  of the
Company are  included  herein in reliance  upon the  respective  reports of such
firms given upon their authority as experts in accounting and auditing in giving
said reports.  The combined financial statements of Moisture Systems Corporation
and Moisture  Systems Limited are included herein in reliance upon the authority
of Arthur  Andersen  LLP as experts in  accounting  and  auditing in giving said
reports.

    The Consolidated Financial Statements of Rutter & Co. B.V. for the two years
ended  December  31,  1995  included  in this  Prospectus  have been  audited by
Deloitte & Touche,  independent auditors and  registeraccountants,  as stated in
their reports appearing herein, and are included in reliance upon the reports of
such firm given upon their authority as experts in accounting and auditing.

                          ADDITIONAL INFORMATION

    The Company  has filed with the  Securities  and  Exchange  Commission  (the
"Commission") a Registration Statement (which term shall include all amendments,
exhibits  and  schedules  thereto)  on Form S-1  under the  Securities  Act with
respect to the securities offered hereby.  This Prospectus,  which constitutes a
part of the Registration Statement,  does not contain all of the information set
forth in the  Registration  Statement,  certain  parts of which are  omitted  in
accordance  with the  rules  and  regulations  of the  Commission.  For  further
information,  reference is made to the Registration  Statement,  copies of which
may be obtained upon payment of the fees  prescribed by the Commission  from the
Public Reference Section of the Commission,  450 Fifth Street, N.W., Washington,
D.C. 20549 and at the Commission's regional offices at Seven World Trade Center,
13th Floor,  New York, New York 10048 and 500 West Madison  Street,  Suite 1400,
Chicago, Illinois 60661.

    The Company is subject to the  informational  requirements  of the  Exchange
Act, and in accordance  therewith  files  reports,  proxy  statements  and other
information  with the  Commission.  Such  reports,  proxy  statements  and other
information  can be  inspected  and  copied at the public  reference  facilities
maintained by the Commission at 450 Fifth Street, N.W., Washington,  D.C. 20549,
and at the  following  Regional  Offices  of the  Commission:  500 West  Madison
Street, Suite 1400, Chicago, Illinois 60661, and Seven World Trade Center, Suite
1300,  New York,  New York 10048.  Copies of such  material can also be obtained
from the Public Reference  Section of the Commission at 450 Fifth Street,  N.W.,
Washington,  D.C. 20549 at prescribed rates. The Commission also maintains a Web
site at  (http://www.sec.gov).  The Common Stock of the Company is listed on the
American Stock Exchange, and the reports, proxy statements and other information
filed by the Company with the  Commission can be inspected at the offices of the
American Stock Exchange, 86 Trinity Place, New York, New York 10006.


                                       40







 
                         INDEX TO FINANCIAL STATEMENTS
 
<TABLE>
<S>                                                                         <C>
THERMEDICS DETECTION INC.
  Reports of Independent Public Accountants...............................  F-2
  Consolidated Statement of Income for the years ended December 31, 1994,
   December 30, 1995 and December 28, 1996 and for the three months ended
   March 30, 1996 and March 29, 1997......................................  F-4
  Consolidated Balance Sheet as of December 30, 1995, December 28, 1996
   and March 29, 1997.....................................................  F-5
  Consolidated Statement of Cash Flows for the years ended December 31,
   1994, December 30, 1995 and December 28, 1996 and for the three months
   ended March 30, 1996 and March 29, 1997................................  F-6
  Consolidated Statement of Shareholders' Investment for the years ended
   December 31, 1994, December 30, 1995 and December 28, 1996 and for the
   three months ended March 29, 1997......................................  F-7
  Notes to Consolidated Financial Statements..............................  F-8
MOISTURE SYSTEMS CORPORATION AND MOISTURE SYSTEMS LIMITED
  Report of Independent Public Accountants................................  F-19
  Combined Statement of Income for the year ended December 30, 1995 and
   for the period from December 31, 1995 through January 25, 1996.........  F-20
  Combined Balance Sheet as of December 30, 1995..........................  F-21
  Combined Statement of Cash Flows for the year ended December 30, 1995
   and for the period from December 31, 1995 through January 25, 1996.....  F-22
  Combined Statement of Owners' Investment for the year ended December 30,
   1995 and for the period from December 31, 1995 through January 25,
   1996...................................................................  F-23
  Notes to Combined Financial Statements..................................  F-24
RUTTER & CO. B.V.
  Auditor's Report........................................................  F-28
  Consolidated Balance Sheets at December 31, 1995 and 1994...............  F-29
  Consolidated Profit and Loss Accounts for the years ended December 31,
   1995 and 1994..........................................................  F-30
  Notes to the Consolidated Balance Sheets and the Consolidated Profit and
   Loss Accounts..........................................................  F-31
  Parent Company Balance Sheets at December 31, 1995 and 1994.............  F-35
  Parent Company Profit and Loss Accounts for the years ended December 31,
   1995 and 1994..........................................................  F-36
  Notes to the Parent Company Balance Sheets and the Parent Company Profit
   and Loss Accounts......................................................  F-37
  Supplementary Information...............................................  F-40
PRO FORMA COMBINED CONDENSED FINANCIAL INFORMATION OF THERMEDICS DETECTION
INC., MOISTURE SYSTEMS AND RUTTER & CO. B.V. (UNAUDITED)
  Pro Forma Combined Condensed Statement of Income for the year ended
   December 28, 1996......................................................  F-45
  Note to Pro Forma Combined Condensed Statement of Income................  F-46
</TABLE>
 
                                      F-1

 
                   REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
To Thermedics Detection Inc.:
 
  We have audited the accompanying consolidated balance sheet of Thermedics
Detection Inc. (a Massachusetts corporation and 94%-owned subsidiary of
Thermedics Inc.) and subsidiaries as of December 30, 1995 and December 28,
1996, and the related consolidated statements of income, cash flows and
shareholders' investment for each of the three years in the period ended
December 28, 1996. These consolidated financial statements are the
responsibility of the Company's management. Our responsibility is to express
an opinion on these consolidated financial statements based on our audits. We
did not audit the financial statements of Rutter & Co. B.V. (a wholly owned
subsidiary of Thermedics Detection Inc.), for the period from January 25, 1996
(the date of acquisition) through and as of December 28, 1996, which
statements reflect total assets and total revenues of 16% and 17% in 1996,
respectively, of the consolidated totals. Those statements were audited by
other auditors whose report has been furnished to us and our opinion, insofar
as it relates to the amounts included for that entity, is based solely on the
report of the other auditors.
 
  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 and the report of other
auditors provide a reasonable basis for our opinion.
 
  In our opinion, based on our audits and the report of other auditors, the
consolidated financial statements referred to above present fairly, in all
material respects, the financial position of Thermedics Detection Inc. and
subsidiaries as of December 30, 1995 and December 28, 1996 and the results of
their operations and their cash flows for each of the three years in the
period ended December 28, 1996, in conformity with generally accepted
accounting principles.
 
                                          Arthur Andersen LLP
 
Boston, Massachusetts
February 3, 1997 (except with respect
to the matter discussed in Note 9
as to which the date is March 26, 1997)
 
                                      F-2

 
                         INDEPENDENT AUDITORS' REPORT
 
  We have audited the consolidated balance sheet of the Rutter & Co. B.V.
segment of Thermedics Detection Inc. as of December 28, 1996, and the related
consolidated statements of income, stockholder's equity, and cash flows for
the period from January 25, 1996 (acquisition date) to December 28, 1996 (all
expressed in Netherlands Guilders) (not included herein). These financial
statements are the responsibility of Thermedics Detection Inc.'s and Rutter &
Co. B.V.'s management. Our responsibility is to express an opinion on these
financial statements based on our audit.
 
  We conducted our audit in accordance with generally accepted auditing
standards in the United States of America. 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
audit provides a reasonable basis for our opinion.
 
  As discussed in the Notes to the financial statements (not included herein),
the consolidated balance sheet of the Rutter & Co. B.V. segment of Thermedics
Detection Inc. includes the net assets acquired by Thermedics Detection Inc.
in its purchase of Rutter & Co. B.V. on January 25, 1996, after giving effect
to the allocation of Thermedics Detection Inc.'s purchase price to the
consolidated net assets of Rutter & Co. B.V. and to the changes in the
consolidated net assets of Rutter & Co. B.V. subsequent to the acquisition;
the related consolidated statements of income, stockholder's equity, and cash
flows reflect the results of operations and cash flows of Rutter & Co. B.V.
subsequent to such acquisition after giving effect to the allocation of
Thermedics Detection Inc.'s purchase price to Rutter & Co. B.V.'s consolidated
net assets.
 
  In our opinion, such consolidated financial statements present fairly, in
all material respects, the financial position of the Rutter & Co. B.V. segment
of Thermedics Detection Inc. at December 28, 1996, and the results of their
operations and their cash flows for the period from January 25, 1996 to
December 28, 1996 in conformity with generally accepted accounting principles
in the United States of America.
 
Deloitte & Touche Registeraccountants
 
Almelo, The Netherlands
January 29, 1997
 
                                      F-3

 
                           THERMEDICS DETECTION INC.
 
                        CONSOLIDATED STATEMENT OF INCOME
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                            THREE MONTHS ENDED
                                                            -------------------
                                                            MARCH 30, MARCH 29,
                                  1994     1995     1996      1996      1997
                                 -------  -------  -------  --------- ---------
                                                                (UNAUDITED)
<S>                              <C>      <C>      <C>      <C>       <C>
Revenues (Note 8)
  Product....................... $40,436  $18,457  $31,255   $6,557    $9,073
  Service.......................   9,907    9,497   12,495    2,788     3,356
                                 -------  -------  -------   ------    ------
                                  50,343   27,954   43,750    9,345    12,429
                                 -------  -------  -------   ------    ------
Costs and Operating Expenses:
  Cost of product revenues......  18,052    9,895   15,417    3,553     4,614
  Cost of service revenues......   6,854    5,341    6,733    1,629     1,482
  Selling, general and
   administrative expenses
   (Note 6).....................  11,973    7,487   15,525    3,558     3,449
  Research and development
   expenses.....................   3,895    2,741    4,608    1,176     1,071
                                 -------  -------  -------   ------    ------
                                  40,774   25,464   42,283    9,916    10,616
                                 -------  -------  -------   ------    ------
Operating Income (Loss).........   9,569    2,490    1,467     (571)    1,813
Interest Income.................     --       --       229      --        203
Interest Expense, Related Party
 (Note 2).......................     --       --    (1,119)    (221)     (306)
Other Income (Expense)..........     --       (72)      12      (45)       (4)
                                 -------  -------  -------   ------    ------
Income (Loss) Before Income
 Taxes..........................   9,569    2,418      589     (837)    1,706
Income Tax (Provision) Benefit
 (Note 4).......................  (3,189)    (910)    (227)     313      (682)
                                 -------  -------  -------   ------    ------
Net Income (Loss)............... $ 6,380  $ 1,508  $   362   $ (524)   $1,024
                                 =======  =======  =======   ======    ======
Earnings (Loss) per Share....... $   .63  $   .15  $   .04   $ (.05)   $  .09
                                 =======  =======  =======   ======    ======
Weighted Average Shares.........  10,069   10,069   10,320   10,099    10,976
                                 =======  =======  =======   ======    ======
</TABLE>
 
 
  The accompanying notes are an integral part of these consolidated financial
                                  statements.
 
                                      F-4

 
                           THERMEDICS DETECTION INC.
 
                           CONSOLIDATED BALANCE SHEET
                      (IN THOUSANDS, EXCEPT SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                                      MARCH 29,
                                                     1995     1996      1997
                                                    -------  -------  ---------
<S>                                                 <C>      <C>      <C>
                      ASSETS
Current Assets:
  Cash and cash equivalents........................ $ 1,282  $13,484   $47,265
  Accounts receivable, less allowances of $516,
   $1,215 and $1,172...............................   4,619    9,387     7,958
  Unbilled contract costs and fees.................   1,152      307       138
  Inventories......................................   8,991    8,793     9,275
  Prepaid and refundable income taxes (Note 4).....   1,530    2,173     2,169
  Prepaid expenses.................................     208      547       556
                                                    -------  -------   -------
                                                     17,782   34,691    67,361
                                                    -------  -------   -------
Property, Plant and Equipment, at Cost, Net........   2,230    1,784     1,649
                                                    -------  -------   -------
Cost in Excess of Net Assets of Acquired Companies
 (Note 2)..........................................     --    16,694    16,088
                                                    -------  -------   -------
Other Assets.......................................     310      314       314
                                                    -------  -------   -------
                                                    $20,322  $53,483   $85,412
                                                    =======  =======   =======
     LIABILITIES AND SHAREHOLDERS' INVESTMENT
Current Liabilities:
  Promissory note to parent company................ $   --   $   --    $21,200
  Accounts payable.................................   1,558    3,030     2,480
  Accrued payroll and employee benefits............     681    1,375     1,187
  Accrued installation and warranty expenses.......   1,414    1,413     1,256
  Deferred revenue.................................   1,324    1,281     1,471
  Customer deposits................................     446      637     1,413
  Other accrued expenses...........................   1,086    3,436     6,293
  Due to parent company and affiliates.............     --       161       632
                                                    -------  -------   -------
                                                      6,509   11,333    35,932
                                                    -------  -------   -------
Deferred Income Taxes (Note 4).....................      40       40        40
                                                    -------  -------   -------
Promissory Note to Parent Company (Note 2).........     --    21,200       --
                                                    -------  -------   -------
Commitments (Note 5)
Shareholders' Investment (Note 3):
  Common stock, $.10 par value, 15,000,000 shares
   authorized;
   10,000,000 shares, 10,683,500 shares and
   13,354,792 shares issued
   and outstanding ................................   1,000    1,068     1,335
  Capital in excess of par value...................   6,114   13,130    40,984
  Retained earnings................................   6,774    7,136     8,160
  Cumulative translation adjustment................    (115)    (424)   (1,039)
                                                    -------  -------   -------
                                                     13,773   20,910    49,440
                                                    -------  -------   -------
                                                    $20,322  $53,483   $85,412
                                                    =======  =======   =======
</TABLE>
 
  The accompanying notes are an integral part of these consolidated financial
                                  statements.
 
                                      F-5

 
                           THERMEDICS DETECTION INC.
 
                      CONSOLIDATED STATEMENT OF CASH FLOWS
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                             THREE MONTHS ENDED
                                                             -------------------
                                                             MARCH 30, MARCH 29,
                                  1994     1995      1996      1996      1997
                                --------  -------  --------  --------- ---------
                                                                 (UNAUDITED)
<S>                             <C>       <C>      <C>       <C>       <C>
OPERATING ACTIVITIES:
 Net income (loss)............  $  6,380  $ 1,508  $    362   $  (524)  $ 1,024
 Adjustments to reconcile net
  income (loss) to net cash
  provided by (used in)
  operating activities:
   Depreciation and
    amortization..............     1,060    1,159     2,364       674       349
   Provision for losses on
    accounts receivable.......       128       98       582        30        18
   Other noncash expenses.....     1,127      727     1,804       313       135
   Increase (decrease) in
    deferred income taxes.....        81      (40)      --        --        --
   Changes in current
    accounts, excluding the
    effects of acquisitions:
     Accounts receivable......     1,862    1,051    (1,776)   (1,284)    1,423
     Unbilled contract costs
      and fees................     1,687     (931)      845       363       169
     Inventories..............     4,649   (3,213)    1,254       241      (515)
     Other current assets.....      (934)    (116)     (599)     (306)      (14)
     Accounts payable.........    (2,977)     182       758      (540)     (550)
     Other current
      liabilities.............   (11,147)  (2,392)    1,045     2,092     3,923
                                --------  -------  --------   -------   -------
      Net cash provided by
       (used in) operating
       activities.............     1,916   (1,967)    6,639     1,059     5,962
                                --------  -------  --------   -------   -------
INVESTING ACTIVITIES:
 Acquisitions (Note 2)........       --       --    (21,668)  (21,668)      --
 Acquisition of product line
  (Note 2)....................       --       --       (300)      --        --
 Purchases of machinery,
  equipment and leasehold
  improvements................      (722)    (608)     (766)     (186)     (131)
 Proceeds from sale of
  machinery, equipment and
  leasehold improvements......       448       19       113         6        82
 Purchase of other assets.....      (471)     --        --        --        --
                                --------  -------  --------   -------   -------
      Net cash used in
       investing activities...      (745)    (589)  (22,621)  (21,848)      (49)
                                --------  -------  --------   -------   -------
FINANCING ACTIVITIES:
 Net proceeds from issuance of
  Company common stock
  (Note 7)....................       --       --      6,964     3,000    28,121
 Proceeds from issuance of
  promissory note to parent
  company (Note 2)............       --       --     21,200    21,200       --
 Transfers to parent company
  and additional capital
  contributions, net .........      (984)   3,170       120       120       --
 Other........................       --       --        (15)      (13)      (18)
                                --------  -------  --------   -------   -------
      Net cash provided by
       (used in) financing
       activities.............      (984)   3,170    28,269    24,307    28,103
                                --------  -------  --------   -------   -------
Exchange Rate Effect on Cash..        14     (138)      (85)       58      (235)
                                --------  -------  --------   -------   -------
Increase in Cash and Cash
 Equivalents..................       201      476    12,202     3,576    33,781
Cash and Cash Equivalents at
 Beginning of Period..........       605      806     1,282     1,282    13,484
                                --------  -------  --------   -------   -------
Cash and Cash Equivalents at
 End of Period................  $    806  $ 1,282  $ 13,484   $ 4,858   $47,265
                                ========  =======  ========   =======   =======
CASH PAID FOR:
 Interest.....................  $    --   $   --   $    596   $   --    $   --
                                ========  =======  ========   =======   =======
 Income taxes.................  $    338  $   152  $    618   $    27   $    23
                                ========  =======  ========   =======   =======
NONCASH ACTIVITIES:
 Fair value of assets of
  acquired companies..........  $    --   $   --   $ 24,328   $24,328   $   --
 Cash paid for acquired
  companies...................       --       --    (21,668)  (21,668)      --
                                --------  -------  --------   -------   -------
    Liabilities assumed of
     acquired companies.......  $    --   $   --   $  2,660   $ 2,660   $   --
                                ========  =======  ========   =======   =======
</TABLE>
 
  The accompanying notes are an integral part of these consolidated financial
                                  statements.
 
                                      F-6

 
                           THERMEDICS DETECTION INC.
 
               CONSOLIDATED STATEMENT OF SHAREHOLDERS' INVESTMENT
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                      COMMON    CAPITAL IN          CUMULATIVE
                                    STOCK, $.10 EXCESS OF  RETAINED TRANSLATION
                                     PAR VALUE  PAR VALUE  EARNINGS ADJUSTMENT
                                    ----------- ---------- -------- -----------
<S>                                 <C>         <C>        <C>      <C>
BALANCE JANUARY 1, 1994...........    $1,000     $ 2,814    $  --     $     8
Net income........................       --          --      6,380        --
Transfer to parent company, net...       --          --       (984)       --
Translation adjustment............       --          --        --         (10)
                                      ------     -------    ------    -------
BALANCE DECEMBER 31, 1994.........     1,000       2,814     5,396         (2)
Net income........................       --          --      1,508        --
Additional capital contribution...       --        3,300       --         --
Transfer to parent company, net...       --          --       (130)       --
Translation adjustment............       --          --        --        (113)
                                      ------     -------    ------    -------
BALANCE DECEMBER 30, 1995.........     1,000       6,114     6,774       (115)
Net income........................       --          --        362        --
Additional capital contribution...       --          120       --         --
Net proceeds from private
 placement of Company common stock
 (Note 7).........................        68       6,896       --         --
Translation adjustment............       --          --        --        (309)
                                      ------     -------    ------    -------
BALANCE DECEMBER 28, 1996.........     1,068      13,130     7,136       (424)
                                                    (UNAUDITED)
Net income........................       --          --      1,024        --
Net proceeds from initial public
 offering of common stock
 (Note 9).........................       267      27,854       --         --
Translation adjustment............       --          --        --        (615)
                                      ------     -------    ------    -------
BALANCE MARCH 29, 1997............    $1,335     $49,984    $8,160    $(1,039)
                                      ======     =======    ======    =======
</TABLE>
 
 
  The accompanying notes are an integral part of these consolidated financial
                                  statements.
 
                                      F-7

 
                           THERMEDICS DETECTION INC.
 
                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
1. NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
 Nature of Operations
 
  Thermedics Detection Inc. ("the Company") develops, manufactures and markets
high-speed on-line detection and measurement systems used in a variety of
industrial process applications, explosives detection and laboratory analysis.
The Company's industrial process systems use ultratrace chemical-concentration
detectors, high-speed gas chromatography, X-ray imaging, near-infrared
spectroscopy and other technologies for quality assurance of in-process and
finished products, primarily in the food, beverage, pharmaceutical, forest
products, chemical and other consumer products industries. The Company's
explosives-detection equipment uses trace particle- and vapor-detection
techniques based on its proprietary chemiluminescene and high-speed gas
chromatography technologies. Customers use the Company's explosives-detection
equipment to detect plastic and other explosives at airports and border
crossings, for other high-security screening applications and for forensics
and search applications.
 
 Relationship with Thermedics Inc. and Thermo Electron Corporation
 
  The Company operated as a division of Thermedics Inc. ("Thermedics") until
its incorporation as a Massachusetts corporation in December 1990. In
connection with the Company's incorporation, Thermedics transferred to the
Company its TEA Analyzer and certain other trace detection technologies in
exchange for 10,000,000 shares of the Company's common stock. As of December
28, 1996, Thermedics owned 94% of the Company's outstanding common stock. As
of December 28, 1996, Thermedics is a 51%-owned subsidiary of Thermo Electron
Corporation ("Thermo Electron").
 
  The accompanying financial statements include the assets, liabilities,
income and expenses of the Company as included in Thermedics' consolidated
financial statements.
 
 Principles of Consolidation
 
  The accompanying financial statements include the accounts of the Company
and its wholly owned subsidiaries. All material intercompany accounts and
transactions have been eliminated.
 
 Fiscal Year
 
  The Company has adopted a fiscal year ending the Saturday nearest December
31. References to 1994, 1995 and 1996 are for the fiscal years ended December
31, 1994, December 30, 1995 and December 28, 1996, respectively.
 
 Revenue Recognition
 
  The Company recognizes product revenues upon shipment of its products. The
Company provides a reserve for its estimate of warranty and installation costs
at the time of shipment. The Company recognizes service revenues over the term
of the contract. Deferred revenue in the accompanying balance sheet consists
of unearned revenue on service contracts which is recognized over the life of
the service contract. Substantially all of the deferred revenue included in
the accompanying balance sheet as of December 30, 1995, will be recognized
within one year. Revenues and profits on long-term contracts are recognized
using the percentage-of-completion method. Revenues recorded under the
percentage-of-completion method, including revenues from long-term research
and development contracts, were $1,923,000 in 1994, $3,987,000 in 1995 and
$1,758,000 in 1996. The percentage of completion is determined by relating the
actual costs incurred to date to management's estimate of total costs to be
incurred on each contract. If a loss is indicated on any contract in process,
a provision is made currently for the entire loss. Contracts generally provide
for the billing of customers on a cost-plus-fixed-fee basis as costs are
incurred. Revenues earned on contracts in process in excess of billings are
classified as unbilled contract costs and fees in the accompanying balance
sheet. There are no significant amounts included in the accompanying balance
sheet that are not expected to be recovered from existing contracts at current
contract values, or that are not expected to be collected within one year,
including amounts that are billed but not paid under retainage provisions.
 
                                      F-8

 
                           THERMEDICS DETECTION INC.
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
 Stock-based Compensation Plans
 
  The Company applies Accounting Principles Board Opinion No. 25, "Accounting
for Stock Issued to Employees" (APB 25) and related Interpretations in
accounting for its stock-based compensation plans (Note 3). Accordingly, no
accounting recognition is given to stock options granted at fair market value
until they are exercised. Upon exercise, net proceeds, including tax benefits
realized, are credited to equity.
 
 Income Taxes
 
  The Company and Thermedics have a tax allocation agreement under which the
Company is included in Thermedics' consolidated federal and certain state
income tax returns. The agreement provides that in years in which the Company
has taxable income, it will pay to Thermedics amounts comparable to the taxes
the Company would have paid had it filed separate tax returns. If Thermedics'
equity ownership of the Company were to drop below 80%, the Company would be
required to file its own income tax returns.
 
  In accordance with Statement of Financial Accounting Standards ("SFAS") No.
109, "Accounting for Income Taxes," the Company recognizes deferred income
taxes based on the expected future tax consequences of differences between the
financial statement basis and the tax basis of assets and liabilities,
calculated using enacted tax rates in effect for the year in which the
differences are expected to be reflected in the tax return.
 
 Earnings per Share
 
  Pursuant to Securities and Exchange Commission requirements, earnings per
share have been presented for all periods. Weighted average shares for all
periods include 10,000,000 shares issued to Thermedics in connection with the
initial capitalization of the Company, the effect of shares sold through
private placements, as well as the effect of the assumed issuance of the
private placements and the assumed exercise of stock options issued within one
year prior to the Company's proposed initial public offering with exercise
prices less than the subscription price. Because the effect of the assumed
exercise of stock options issued more than one year prior to the Company's
proposed initial public offering would be immaterial, they have been excluded
from the earnings per share calculation.
 
 Stock Split
 
  In March 1996, the Company declared and effected a two-for-three reverse
stock split. All share and per share information has been restated to reflect
the stock split.
 
 Cash and Cash Equivalents
 
  Cash receipts and cash disbursements of the Company's domestic operations
were combined with other Thermedics corporate cash transactions and balances
prior to the Company's March 1996 private placement of common stock.
Therefore, cash of the Company's domestic operations is not included in the
accompanying balance sheet as of December 30, 1995. The Company's cash
equivalents in 1995 include investments in commercial paper and short-term
certificates of deposit of the Company's foreign operations, which have an
original maturity of three months or less. Cash and cash equivalents are
carried at cost, which approximates market value.
 
  As of December 28, 1996, $10,976,000 of the Company's cash equivalents were
invested in a repurchase agreement with Thermo Electron. Under this agreement,
the Company in effect lends excess cash to Thermo Electron, which Thermo
Electron collateralizes with investments principally consisting of U.S.
government agency securities, corporate notes, commercial paper, money market
funds and other marketable securities, in the amount of at least 103% of such
obligation. The Company's funds subject to the repurchase agreement are
readily convertible into cash by the Company and have an original maturity of
three months or less. The
 
                                      F-9

 
                           THERMEDICS DETECTION INC.
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
repurchase agreement earns a rate based on the 90-day Commercial Paper
Composite Rate plus 25 basis points, set at the beginning of each quarter.
 
 Inventories
 
  Inventories are stated at the lower of cost (on a first-in, first-out basis)
or market value and include materials, labor and manufacturing overhead. The
components of inventories are as follows:
 
<TABLE>
<CAPTION>
                                                                 1995    1996
                                                                ------- -------
                                                                (IN THOUSANDS)
   <S>                                                          <C>     <C>
   Raw material and supplies................................... $ 7,089 $ 6,135
   Work in process.............................................     784     871
   Finished goods..............................................   1,118   1,787
                                                                ------- -------
                                                                $ 8,991 $ 8,793
                                                                ======= =======
</TABLE>
 
 Property, Plant and Equipment
 
  The costs of additions and improvements are capitalized, while maintenance
and repairs are charged to expense as incurred. The Company provides for
depreciation and amortization using the straight-line method over the
estimated useful lives of the property as follows: machinery and equipment,
three to ten years and leasehold improvements, the lesser of the term of the
lease or the life of the asset. Property, plant and equipment is comprised of
the following:
 
<TABLE>
<CAPTION>
                                                                 1995    1996
                                                                ------- -------
                                                                (IN THOUSANDS)
   <S>                                                          <C>     <C>
   Machinery, equipment and leasehold improvements............. $ 4,874 $ 5,683
   Less: Accumulated depreciation and amortization.............   2,644   3,899
                                                                ------- -------
                                                                $ 2,230 $ 1,784
                                                                ======= =======
</TABLE>
 
 Cost in Excess of Net Assets of Acquired Companies
 
  The excess of cost over the fair value of net assets of acquired companies
is amortized using the straight-line method over periods not exceeding 40
years. Accumulated amortization was $403,000 at December 28, 1996. The Company
assesses the future useful life of this asset whenever events or changes in
circumstances indicate that the current useful life has diminished. The
Company considers the future undiscounted cash flows of the acquired companies
in assessing the recoverability of this asset. If impairment has occurred, any
excess of carrying value over fair value is recorded as a loss.
 
 Foreign Currency
 
  All assets and liabilities of the Company's foreign subsidiaries are
translated at year-end exchange rates, and revenues and expenses are
translated at average exchange rates for the year in accordance with SFAS
No. 52, "Foreign Currency Translation." Resulting translation adjustments are
reflected as a separate component of shareholders' investment titled
"Cumulative translation adjustment." Foreign currency transaction gains and
losses are included in the accompanying statement of operations and are not
material for the three years presented.
 
                                     F-10

 
                           THERMEDICS DETECTION INC.
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
 Fair Value of Financial Instruments
 
  The Company's financial instruments consist primarily of cash and cash
equivalents, accounts receivable, accounts payable, due to parent company and
affiliates and promissory note to parent company. Their respective carrying
amounts in the accompanying balance sheet approximate fair value due to their
short-term nature, except for the promissory note to parent company. The
carrying amount of the promissory note to parent company approximates fair
value based on borrowing rates available to the Company at December 28, 1996.
 
 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 reported amounts of assets and liabilities,
disclosure of contingent assets and liabilities at the date of the financial
statements, and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.
 
 Interim Financial Statements
 
  The financial statements as of March 29, 1997 and for the three months ended
March 30, 1996 and March 29, 1997, are unaudited but, in the opinion of
management, reflect all adjustments of a normal recurring nature necessary for
a fair presentation of results for these interim periods. The results of
operations for the three-month period ended March 29, 1997 are not necessarily
indicative of the results to be expected for the entire year.
 
2. ACQUISITIONS
 
  On January 25, 1996, the Company acquired the assets of Moisture Systems
Corporation and certain affiliated companies (collectively, "Moisture
Systems"), and the stock of Rutter & Co. B.V. ("Rutter") for a total purchase
price of $21,668,000 in cash, which included the repayment of $700,000 of
debt. Moisture Systems and Rutter design, manufacture and sell instruments
that use near infrared spectroscopy to measure moisture and other product
constituents, including fats, proteins, oils, flavorings, solvents, adhesives
and coatings, in a variety of manufacturing processes. These systems are used
across the food, pharmaceutical, chemical, petrochemical, tobacco, forest
products, pulp and paper, converting, plastics, textiles, corrugating and
other industries. To finance these acquisitions, the Company borrowed
$21,200,000 from Thermedics pursuant to a promissory note due March 1998,
bearing interest at the 90-day Commercial Paper Composite Rate plus 25 basis
points, set at the beginning of each quarter. As of December 28, 1996, the
interest rate on the promissory note was 5.77%. In December 1996, the Company
acquired certain moisture measurement product lines for approximately $300,000
in cash, subject to certain post closing adjustments. In addition, the Company
has agreed to pay a licensing fee on sales of these products through December
2000.
 
  These acquisitions have been accounted for using the purchase method of
accounting and their results of operations have been included in the
accompanying financial statements from their respective dates of acquisition.
The aggregate cost of Moisture Systems and Rutter exceeded the estimated fair
value of the acquired net assets by $17,326,000, which is being amortized over
40 years. Allocation of the purchase price for these acquisitions was based on
estimates of the fair value of the net assets acquired.
 
  The following table presents selected financial information for the Company,
Moisture Systems and Rutter on a pro forma basis, as if the acquisitions of
Moisture Systems and Rutter had occurred as of January 1, 1995.
 
<TABLE>
<CAPTION>
                                                                  1995    1996
                                                                 ------- -------
                                                                 (IN THOUSANDS,
                                                                   EXCEPT PER
                                                                 SHARE AMOUNTS)
   <S>                                                           <C>     <C>
   Revenues..................................................... $46,485 $45,297
   Net Income...................................................   1,796     520
   Earnings per Share...........................................     .18     .05
</TABLE>
 
  The pro forma results are not necessarily indicative of future operations on
the actual results that would have occurred had the acquisitions of Moisture
Systems and Rutter been made at the beginning of 1995. Additional pro forma
information for the Company, Moisture Systems and Rutter is included elsewhere
in this prospectus.
 
                                     F-11

 
                           THERMEDICS DETECTION INC.
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
3. EMPLOYEE BENEFIT PLANS
 
 Stock-based Compensation Plans
 
 Stock Option Plan
 
  On November 1, 1994, the Company adopted a stock-based compensation plan for
its key employees, directors and others, which permits the grant of a variety
of stock and stock-based awards as determined by the human resources committee
of the Company's Board of Directors (the "Board Committee"), including
restricted stock, stock options, stock bonus shares or performance-based
shares. The option recipients and the terms of options granted under this plan
are determined by the Board Committee. Options granted generally vest and
become immediately exercisable on the ninth anniversary of the grant date,
unless the Company's common stock becomes publicly traded prior to such date.
In such an event, options become exercisable 90 days after the Company becomes
subject to the Securities Exchange Act of 1934, but will be subject to certain
transfer restrictions and the right of the Company to repurchase shares issued
upon exercise of the options at the exercise price, upon certain events. The
restrictions and repurchase rights generally will be deemed to have lapsed
ratably over periods ranging from five to ten years after the first
anniversary of the grant date, depending on the term of the option, which will
generally range from ten to twelve years. Nonqualified stock options may be
granted at any price determined by the Board Committee, although incentive
stock options must be granted at not less than the fair market value of the
Company's common stock on the date of grant. To date, all options have been
granted at fair market value.
 
 Employee Stock Purchase Plan
 
  Substantially all of the Company's full-time U.S. employees are eligible to
participate in an employee stock purchase plan sponsored by Thermedics. Under
this plan, shares of Thermedics and Thermo Electron's common stock may be
purchased at the end of a 12-month plan year at 95% of the fair market value
at the beginning of the plan year, and the shares purchased are subject to a
six-month resale restriction. Prior to November 1, 1995, the applicable shares
of common stock could be purchased at 85% of the fair market value at the
beginning of the plan year, and the shares purchased were subject to a one-
year resale restriction. Shares are purchased through payroll deductions of up
to 10% of each participating employee's gross wages.
 
 Pro Forma Stock-based Compensation Plans Expense
 
  In October 1995, the Financial Accounting Standards Board issued Statement
of Financial Accounting Standards (SFAS) No. 123, "Accounting for Stock-Based
Compensation," which sets forth a fair-value based method of recognizing
stock-based compensation expense. As permitted by SFAS No. 123, the Company
has elected to continue to apply APB 25 in accounting for its stock-based
compensation plans. Had compensation cost for awards in 1996 under the
Company's stock-based compensation plans been determined based on the fair
value at the grant dates consistent with the method set forth under SFAS No.
123, the effect on the Company's net income and earnings per share would have
been as follows:
 
<TABLE>
<CAPTION>
                                                                   1996
                                                           ---------------------
                                                           (IN THOUSANDS, EXCEPT
                                                            PER SHARE AMOUNTS)
   <S>                                                     <C>
   Net income:
     As reported..........................................         $362
     Pro forma............................................          102
   Earnings per share:
     As reported..........................................          .04
     Pro forma............................................          .01
</TABLE>
 
  Pro forma net income for 1995 was not materially different from historical
net income in 1995.
 
                                     F-12

 
                           THERMEDICS DETECTION INC.
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
  Because the method prescribed by SFAS No. 123 has not been applied to
options granted prior to January 1, 1995, the resulting pro forma compensation
expense may not be representative of the amount to be expected in future
years. Pro forma compensation expense for options granted is reflected over
the vesting period, therefore future pro forma compensation expense may be
greater as additional options are granted.
 
  The fair value of each option grant is estimated on the grant date using the
Black-Scholes option-pricing model with the following weighted-average
assumptions:
 
<TABLE>
<CAPTION>
                                                                          1996
                                                                         -------
   <S>                                                                   <C>
   Risk-free interest rate..............................................    6.4%
   Expected life of options............................................. 7 years
</TABLE>
 
  Expected volatility of zero is assumed for options granted in Company common
stock due to the Company's status as nonpublic.
 
  The Black-Scholes option-pricing model was developed for use in estimating
the fair value of traded options which have no vesting restrictions and are
fully transferable. In addition, option-pricing models require the input of
highly subjective assumptions. Because the Company's employee stock options
have characteristics significantly different from those of traded options, and
because changes in the subjective input assumptions can materially affect the
fair value estimate, in management's opinion, the existing models do not
necessarily provide a reliable single measure of the fair value of its
employee stock options.
 
 Stock Option Plan Activity
 
  A summary of the Company's stock option activity is as follows:
 
<TABLE>
<CAPTION>
                                     1996            1995            1994
                                --------------- --------------- ---------------
                                                                       RANGE OF
                                       WEIGHTED        WEIGHTED         OPTION
                                NUMBER AVERAGE  NUMBER AVERAGE  NUMBER  PRICES
                                  OF   EXERCISE   OF   EXERCISE   OF     PER
                                SHARES  PRICE   SHARES  PRICE   SHARES  SHARE
                                ------ -------- ------ -------- ------ --------
                                   (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
<S>                             <C>    <C>      <C>    <C>      <C>    <C>
Options outstanding, beginning
 of year......................    25    $ 9.75    26    $9.75    --       --
  Granted.....................   207    $10.45     2    $9.75     26    $9.75
  Exercised...................   --     $  --    --     $ --     --       --
  Forfeited...................   --     $  --    --     $ --     --       --
  Expired.....................   (14)   $ 9.79    (3)   $9.75    --       --
                                 ---    ------   ---    -----    ---    -----
Options outstanding, end of
 year.........................   218    $10.41    25    $9.75     26    $9.75
                                 ===    ======   ===    =====    ===    =====
Options exercisable...........   --     $  --    --     $ --     --     $ --
                                 ===    ======   ===    =====    ===    =====
Options available for grant...   116             309             308
                                 ===             ===             ===
Weighted average fair value of
 options granted during year..          $ 3.76          $4.15
                                        ======          =====
</TABLE>
 
  As of December 28, 1996, the options outstanding were exercisable at prices
ranging from $9.75 to $10.75 and had a weighted-average remaining contractual
life of 9.7 years.
 
  At December 28, 1996, the Company had reserved 358,333 unissued shares of
its common stock for possible issuance under the stock-based compensation
plans.
 
                                     F-13

 
                           THERMEDICS DETECTION INC.
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
 401(k) Savings Plan
 
  Substantially all of the Company's full-time U.S. employees are eligible to
participate in Thermo Electron's 401(k) savings plan. Contributions to the
401(k) savings plan are made by both the employee and the Company. Company
contributions are based upon the level of employee contributions. For this
plan, the Company contributed and charged to expense $159,000, $233,000 and
$247,000 in 1994, 1995 and 1996, respectively.
 
 Defined Benefit Pension Plan
 
  The Company's Rutter subsidiary, acquired in January 1996, has a defined
benefit pension plan covering substantially all of its full-time employees.
The Company's funding policy is to make contributions within a range required
by applicable regulations in the Netherlands.
 
  Net periodic pension costs included the following components:
 
<TABLE>
<CAPTION>
                                                                       1996
                                                                  --------------
                                                                  (IN THOUSANDS)
<S>                                                               <C>
Service cost.....................................................      $ 22
Interest cost on projected benefit obligation....................        45
Return on plan assets............................................        (9)
Amortization of unrecognized obligation..........................       (26)
                                                                       ----
                                                                       $ 32
                                                                       ====
</TABLE>
 
  The funded status of the Company's defined benefit pension plan is as
follows:
 
<TABLE>
<CAPTION>
                                                                       1996
                                                                  --------------
                                                                  (IN THOUSANDS)
   <S>                                                            <C>
   Actuarial present value of benefit obligations:
     Vested benefits.............................................      $607
     Non-vested benefits.........................................       --
                                                                       ----
     Accumulated benefit obligation..............................       607
   Effect of projected future salary increases...................       152
                                                                       ----
   Projected benefit obligation..................................       759
   Plan assets at fair value.....................................       965
                                                                       ----
   Excess of plan assets over projected benefit obligation.......       206
   Unrecognized net gain.........................................       196
   Initial unrecognized net obligation...........................       (69)
                                                                       ----
     Prepaid pension cost........................................      $333
                                                                       ====
</TABLE>
 
  Significant actuarial assumptions used to determine the net periodic pension
cost during 1996 were:
 
<TABLE>
<CAPTION>
                                                                           1996
                                                                           ----
   <S>                                                                     <C>
   Discount rate..........................................................   7%
   Rate of increase in salary levels up to age 45......................... 4.5%
   Rate of increase in salary levels after age 45......................... 2.5%
   Expected long-term rate of return on assets............................ 4.0%
</TABLE>
 
                                     F-14

 
                           THERMEDICS DETECTION INC.
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
4. INCOME TAXES
 
  The components of income before income taxes are as follows:
 
<TABLE>
<CAPTION>
                                                           1994   1995   1996
                                                          ------ ------ -------
                                                             (IN THOUSANDS)
   <S>                                                    <C>    <C>    <C>
   Domestic.............................................. $9,379 $2,197 $(1,742)
   Foreign...............................................    190    221   2,331
                                                          ------ ------ -------
                                                          $9,569 $2,418 $   589
                                                          ====== ====== =======
</TABLE>
 
  The components of the provision for income taxes are as follows:
 
<TABLE>
<CAPTION>
                                                             1994   1995  1996
                                                            ------  ----  -----
                                                             (IN THOUSANDS)
   <S>                                                      <C>     <C>   <C>
   Currently payable:
     Federal............................................... $2,736  $681  $(350)
     State.................................................    568   166    (90)
     Foreign...............................................    116    94    692
                                                            ------  ----  -----
                                                             3,420   941    252
                                                            ------  ----  -----
   Net prepaid:
     Federal...............................................   (188)  (25)  (195)
     State.................................................    (43)   (6)   (34)
     Foreign...............................................    --    --     204
                                                            ------  ----  -----
                                                              (231)  (31)   (25)
                                                            ------  ----  -----
                                                            $3,189  $910  $ 227
                                                            ======  ====  =====
</TABLE>
 
  Provision for income taxes in the accompanying statement of operations
differs from the provision calculated by applying the statutory federal income
tax rate of 34% to income before provision for income taxes due to the
following:
 
<TABLE>
<CAPTION>
                                                             1994   1995   1996
                                                            ------  -----  ----
                                                             (IN THOUSANDS)
   <S>                                                      <C>     <C>    <C>
   Provision for income taxes at statutory rate............ $3,253  $ 822  $201
   Increases (decreases) resulting from:
     State income taxes, net of federal tax................    346    106   (82)
     Foreign tax rate and tax law differential.............     51     19   103
     Tax benefit of foreign sales corporation..............   (499)  (133)  --
     Deemed dividend from foreign subsidiary...............    --      80   --
     Other, net............................................     38     16     5
                                                            ------  -----  ----
                                                            $3,189  $ 910  $227
                                                            ======  =====  ====
</TABLE>
 
                                     F-15

 
                           THERMEDICS DETECTION INC.
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
  Prepaid income taxes and deferred income taxes in the accompanying balance
sheet consist of the following:
 
<TABLE>
<CAPTION>
                                                                 1995    1996
                                                                ------- -------
                                                                (IN THOUSANDS)
   <S>                                                          <C>     <C>
   Prepaid income taxes:
     Reserves and other accruals............................... $   556 $   999
     Inventory basis difference................................     675     643
     Accrued compensation......................................     133     130
     Other, net................................................      28      30
                                                                ------- -------
                                                                $ 1,392 $ 1,802
                                                                ======= =======
   Deferred income taxes:
     Depreciation.............................................. $    40 $    40
                                                                ======= =======
</TABLE>
 
5. COMMITMENTS
 
  The Company leases portions of its office and operating facilities under
various operating lease arrangements. The accompanying statement of income
includes expenses from operating leases of $413,000, $542,000 and $1,335,000
in 1994, 1995 and 1996, respectively. Total future minimum payments due under
noncancelable operating leases at December 28, 1996, are $1,220,000 in 1997;
$1,041,000 in 1998; $953,000 in 1999; $880,000 in 2000; $850,000 in 2001; and
$3,714,000 in 2002 and thereafter. Total future minimum lease payments are
$8,658,000.
 
6. RELATED PARTY TRANSACTIONS
 
 Corporate Services Agreement
 
  The Company and Thermo Electron have a corporate services agreement under
which Thermo Electron's corporate staff provides certain administrative
services, including certain legal advice and services, risk management,
certain employee benefit administration, tax advice and preparation of tax
returns, centralized cash management, and certain financial and other
services, for which the Company pays Thermo Electron an annual fee equal to
1.0% of the Company's revenues. The Company paid Thermo Electron an amount
equal to 1.25% and 1.20% of the Company's revenues in 1994 and 1995,
respectively. The annual fee is reviewed and adjusted annually by mutual
agreement of the parties. For these services, the Company was charged
$629,000, $335,000 and $438,000 in 1994, 1995 and 1996, respectively.
Management believes that the service fee charged by Thermo Electron is
reasonable and that such fees are representative of the expenses the Company
would have incurred on a stand-alone basis. The corporate services agreement
is renewed annually but can be terminated upon 30 days' prior notice by the
Company or upon the Company's withdrawal from the Thermo Electron Corporate
Charter (the Thermo Electron Corporate Charter defines the relationship among
Thermo Electron and its majority-owned subsidiaries). For additional items
such as employee benefit plans, insurance coverage and other identifiable
costs, Thermo Electron charges the Company based upon costs attributable to
the Company.
 
 Research and Development Agreement
 
  Pursuant to a subcontract entered into in October 1993, the Company performs
research and development services for Coleman Research Corporation
("Coleman"), which is the prime contractor under a contract with the U.S.
Department of Energy. Coleman is a wholly owned subsidiary of Thermo Electron
and was acquired by Thermo Electron in March 1995. Coleman paid the Company
$234,000, $829,000 and $619,000 for services rendered in 1994, 1995 and 1996,
respectively.
 
                                     F-16

 
                           THERMEDICS DETECTION INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 Purchase Arrangement
 
  The Company purchases an X-ray source that is used as a component in its
InScan systems from Trex Medical Corporation, a publicly traded, majority-
owned subsidiary of ThermoTrex Corporation, which is itself a publicly-traded,
majority-owned subsidiary of Thermo Electron. Each of such X-ray sources is
purchased pursuant to written purchase orders. The Company paid Trex Medical
Corporation $18,000, $285,000 and $162,000 under this arrangement in 1994,
1995 and 1996, respectively.
 
 Sublease Agreement
 
  Subsequent to year end 1996, the Company subleased approximately 8,000
square feet of space in its Chelmsford, Massachusetts, facility to Thermo
Cardiosystems Inc. ("Thermo Cardiosystems"), a publicly traded, majority-owned
subsidiary of Thermedics, under a two-year sublease agreement. Under this
sublease, Thermo Cardiosystems will pay the Company base rent of $40,000 in
the first year and $44,000 in the second year, together with an amount equal
to approximately $33,000 per year, representing Thermo Cardiosystems' pro rata
allocation of the facility's aggregate operating costs, real estate taxes and
utilities.
 
 Repurchase Agreement
 
  The Company invests excess cash in a repurchase agreement with Thermo
Electron as discussed in Note 1.
 
7. PRIVATE PLACEMENTS OF COMMON STOCK
 
  In March 1996, the Company issued 300,000 shares of its common stock in a
private placement at $10.00 per share, for net proceeds of $3,000,000.
 
  In November 1996, the Company issued 383,500 shares of its common stock in a
private placement at $10.75 per share, for net proceeds of $3,964,000.
 
                                     F-17

 
                           THERMEDICS DETECTION INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONCLUDED)
 
8. SIGNIFICANT CUSTOMER AND GEOGRAPHICAL INFORMATION
 
  Sales to one customer accounted for 64%, 36% and 24% of the Company's total
revenues in 1994, 1995 and 1996, respectively.
 
  The Company is engaged in one business segment: developing, manufacturing
and marketing of high-speed on-line detection and measurement systems used in
a variety of industrial process applications, explosives detection and
laboratory analysis. The following table shows data for the Company by
geographical area.
 
<TABLE>
<CAPTION>
                                                     1994     1995     1996
                                                    -------  -------  -------
                                                        (IN THOUSANDS)
   <S>                                              <C>      <C>      <C>
   Revenues:
     United States................................. $47,098  $22,571  $32,003
     The Netherlands...............................     --       --     7,547
     Other Europe..................................   7,454    4,057    5,893
     Other.........................................   2,042    2,600    2,588
     Transfers among geographical areas (a)........  (6,251)  (1,274)  (4,281)
                                                    -------  -------  -------
                                                    $50,343  $27,954  $43,750
                                                    =======  =======  =======
   Income before provision for income taxes:
     United States................................. $ 9,505  $ 2,933  $  (859)
     The Netherlands...............................     --       --     1,514
     Other Europe..................................     317     (127)     394
     Other.........................................    (126)     348      412
     Corporate and eliminations (b)................    (127)    (664)       6
                                                    -------  -------  -------
     Total operating income........................   9,569    2,490    1,467
     Other expense.................................     --       (72)    (878)
                                                    -------  -------  -------
                                                    $ 9,569  $ 2,418  $   589
                                                    =======  =======  =======
   Identifiable assets:
     United States................................. $14,369  $15,806  $31,924
     The Netherlands...............................     --       --     8,574
     Other Europe..................................   2,509    2,850    3,506
     Other.........................................     915    1,666    1,615
     Corporate and eliminations (c)................     --       --     7,864
                                                    -------  -------  -------
                                                    $17,793  $20,322  $53,483
                                                    =======  =======  =======
   Export revenues included in United States
    revenues above (d):
     Mexico........................................ $10,416  $ 1,363  $ 2,015
     Germany.......................................   6,028    3,914    2,487
     Other Europe..................................   9,200    3,995    4,420
     South America.................................  10,892    3,271    3,998
     Other.........................................   3,139    2,341    4,437
                                                    -------  -------  -------
                                                    $39,675  $14,884  $17,357
                                                    =======  =======  =======
</TABLE>
- --------
(a) Transfers among geographical areas are accounted for at prices that are
    representative of transactions with unaffiliated parties.
(b) Primarily general and administrative expenses.
(c) Primarily cash and cash equivalents.
(d) In general, export sales are denominated in U.S. dollars.
 
9. SUBSEQUENT EVENT
 
  In March 1997, the Company sold 2,671,292 shares of common stock in an
initial public offering at $11.50 per share for net proceeds of $28.1 million.
Following the offering, Thermedics owned 75% of the Company's outstanding
common stock.
 
                                     F-18

 
                   REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
To Moisture Systems Corporation and Moisture Systems Limited:
 
  We have audited the accompanying combined balance sheet of Moisture Systems
Corporation and Moisture Systems Limited (collectively, the Company) as of
December 30, 1995, and the related combined statements of income, cash flows
and owners' investment for the year ended December 30, 1995 and for the period
from December 31, 1995 through January 25, 1996. These combined financial
statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these combined 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 combined financial statements referred to above present
fairly, in all material respects, the financial position of Moisture Systems
Corporation and Moisture Systems Limited as of December 30, 1995 and the
results of their operations and their cash flows for the year ended December
30, 1995 and for the period from December 31, 1995 through January 25, 1996,
in conformity with generally accepted accounting principles.
 
                                          Arthur Andersen LLP
 
Boston, Massachusetts
February 3, 1997
 
                                     F-19

 
           MOISTURE SYSTEMS CORPORATION AND MOISTURE SYSTEMS LIMITED
 
                          COMBINED STATEMENT OF INCOME
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                   DEC. 31, 1995
                                                                      THROUGH
                                                           1995    JAN. 25, 1996
                                                          -------  -------------
<S>                                                       <C>      <C>
Revenues (Note 6)........................................ $12,075     $1,141
                                                          -------     ------
Costs and Operating Expenses:
  Cost of revenues.......................................   5,805        563
  Selling, general and administrative expenses...........   5,423        495
                                                          -------     ------
                                                           11,228      1,058
                                                          -------     ------
Operating Income.........................................     847         83
Interest Income..........................................      24          1
Interest Expense (Note 4)................................    (189)       (18)
                                                          -------     ------
Income Before Provision for Income Taxes.................     682         66
Provision for Income Taxes (Note 3)......................      47          6
                                                          -------     ------
Net Income............................................... $   635     $   60
                                                          =======     ======
</TABLE>
 
 
 
 
    The accompanying notes are an integral part of these combined financial
                                  statements.
 
                                      F-20

 
           MOISTURE SYSTEMS CORPORATION AND MOISTURE SYSTEMS LIMITED
 
                             COMBINED BALANCE SHEET
                                 (IN THOUSANDS)
<TABLE>
<CAPTION>
                                                                         1995
                                                                        ------
<S>                                                                     <C>
                                ASSETS
Current Assets:
  Cash and cash equivalents............................................ $  297
  Accounts receivable, less allowance of $86...........................  2,264
  Inventories..........................................................  1,978
  Prepaid expenses.....................................................     26
                                                                        ------
                                                                         4,565
                                                                        ------
Property, Plant and Equipment, at Cost, Net............................  1,006
                                                                        ------
Other Assets...........................................................     22
                                                                        ------
                                                                        $5,593
                                                                        ======
                  LIABILITIES AND OWNERS' INVESTMENT
Current Liabilities:
  Notes payable and current portion of capital lease obligation (Note
   4).................................................................. $1,157
  Accounts payable.....................................................  1,008
  Accrued payroll and employee benefits................................    191
  Dividends payable (Note 5)...........................................    120
  Other accrued expenses...............................................    597
                                                                        ------
                                                                         3,073
                                                                        ------
Long-term Obligations:
  Capital lease obligation (Note 4)....................................    233
  Other................................................................     42
                                                                        ------
                                                                           275
                                                                        ------
Owners' Investment (Note 5):
  Common Stock.........................................................    --
  Capital in excess of par value.......................................  3,128
  Accumulated deficit..................................................   (587)
  Treasury stock, at cost..............................................   (296)
                                                                        ------
                                                                         2,245
                                                                        ------
                                                                        $5,593
                                                                        ======
</TABLE>
 
 
    The accompanying notes are an integral part of these combined financial
                                  statements.
 
                                      F-21

 
           MOISTURE SYSTEMS CORPORATION AND MOISTURE SYSTEMS LIMITED
 
                       COMBINED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                  DEC. 31, 1995
                                                                     THROUGH
                                                          1995    JAN. 25, 1996
                                                         -------  -------------
<S>                                                      <C>      <C>
OPERATING ACTIVITIES:
  Net income............................................ $   635      $  60
  Adjustments to reconcile net income to net cash
   provided by operating activities:
    Depreciation........................................     445         11
    Provision for losses on accounts receivable.........      33          2
    Other noncash expenses..............................      (2)       --
    Changes in current accounts:
      Accounts receivable...............................     495       (160)
      Inventories.......................................    (486)       120
      Other current assets..............................      85          6
      Accounts payable..................................    (188)       146
      Other current liabilities.........................     256         (9)
                                                         -------      -----
        Net cash provided by operating activities.......   1,273        176
                                                         -------      -----
INVESTING ACTIVITIES:
  Purchases of property, plant and equipment............    (112)        (4)
  Proceeds from sale of property, plant and equipment...      96        --
  Increase in other assets..............................     (22)        (8)
                                                         -------      -----
        Net cash used in investing activities...........     (38)       (12)
                                                         -------      -----
FINANCING ACTIVITIES:
  Net proceeds from line of credit (Note 4).............     723        --
  Repayment of note payable (Note 4)....................  (1,071)       --
  Repayment of capital lease obligation.................    (409)       (34)
  Repayment of related party debt (Note 7)..............     (89)       (23)
  Dividends paid........................................    (617)      (120)
                                                         -------      -----
        Net cash used in financing activities...........  (1,463)      (177)
                                                         -------      -----
Decrease in Cash and Cash Equivalents...................    (228)       (13)
Cash and Cash Equivalents at Beginning of Period........     525        297
                                                         -------      -----
Cash and Cash Equivalents at End of Period.............. $   297      $ 284
                                                         =======      =====
CASH PAID FOR:
  Interest.............................................. $   189      $  18
                                                         =======      =====
  Income Taxes.......................................... $    36      $ --
                                                         =======      =====
</TABLE>
 
    The accompanying notes are an integral part of these combined financial
                                  statements.
 
                                      F-22

 
           MOISTURE SYSTEMS CORPORATION AND MOISTURE SYSTEMS LIMITED
 
                    COMBINED STATEMENT OF OWNERS' INVESTMENT
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                 CAPITAL IN
                                          COMMON EXCESS OF  ACCUMULATED TREASURY
                                          STOCK  PAR VALUE    DEFICIT    STOCK
                                          ------ ---------- ----------- --------
<S>                                       <C>    <C>        <C>         <C>
BALANCE DECEMBER 31, 1994................ $ --     $3,128      $(866)    $(296)
Net income...............................   --        --         635       --
Dividends declared (Note 5)..............   --        --        (356)      --
                                          -----    ------      -----     -----
BALANCE DECEMBER 30, 1995................   --      3,128       (587)     (296)
Net income...............................   --        --          60       --
                                          -----    ------      -----     -----
BALANCE JANUARY 25, 1996................. $ --     $3,128      $(527)    $(296)
                                          =====    ======      =====     =====
</TABLE>
 
 
 
 
    The accompanying notes are an integral part of these combined financial
                                  statements.
 
                                      F-23

 
           MOISTURE SYSTEMS CORPORATION AND MOISTURE SYSTEMS LIMITED
 
                    NOTES TO COMBINED FINANCIAL STATEMENTS
 
1. NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
 Principles of Combination and Nature of Operations
 
  The accompanying combined financial statements include the accounts of
Moisture Systems Corporation (a Massachusetts corporation) and Moisture
Systems Limited (a United Kingdom corporation) (collectively, "the Company"),
companies under common control. The Company designs, manufactures and sells
instruments that use near infrared spectroscopy to measure moisture and other
product constituents, including fats, proteins, oils, flavorings, solvents,
adhesives and coatings, in a variety of manufacturing processes. The Company's
systems are used across the food, pharmaceutical, chemical, petrochemical,
tobacco, forest products, pulp and paper, converting, plastics, textiles,
corrugating and other industries. All material intercompany accounts and
transactions have been eliminated.
 
 Fiscal Year
 
  The Company has adopted a fiscal year ending the Saturday nearest December
31. References to 1995 are for the fiscal year ended December 30, 1995.
 
 Revenue Recognition
 
  The Company recognizes revenues upon shipment of its products. The Company
provides a reserve for its estimate of warranty and installation costs at the
time of shipment.
 
 Cash and Cash Equivalents
 
  The Company considers liquid investments with original maturity of three
months or less when purchased to be cash equivalents.
 
 Inventories
 
  Inventories are stated at the lower of cost (on a first-in, first-out basis)
or market value and include materials, labor and manufacturing overhead. The
components of inventories are as follows:
 
<TABLE>
<CAPTION>
                                                                       1995
                                                                  --------------
                                                                  (IN THOUSANDS)
   <S>                                                            <C>
   Raw material and supplies.....................................     $1,812
   Work in process and finished goods............................        166
                                                                      ------
                                                                      $1,978
                                                                      ======
</TABLE>
 
 Property, Plant and Equipment
 
  The costs of additions and improvements are capitalized, while maintenance
and repairs are charged to expense as incurred. The Company provides for
depreciation and amortization using the straight-line method over the
estimated useful lives of the property as follows: building--30 years;
building under capital lease--ten years; and machinery and equipment--three to
ten years. Property, plant and equipment consist of the following:
 
<TABLE>
<CAPTION>
                                                                       1995
                                                                  --------------
                                                                  (IN THOUSANDS)
   <S>                                                            <C>
   Building......................................................     $  213
   Building under capital lease..................................      3,058
   Machinery and equipment.......................................      1,506
                                                                      ------
                                                                       4,777
   Less: Accumulated depreciation and amortization...............      3,771
                                                                      ------
                                                                      $1,006
                                                                      ======
</TABLE>
 
 Fair Value of Financial Instruments
 
  The Company's financial instruments consist primarily of cash and cash
equivalents, accounts receivable, notes payable and current portion of capital
lease obligation, accounts payable, and long-term obligations. The
 
                                     F-24

 
           MOISTURE SYSTEMS CORPORATION AND MOISTURE SYSTEMS LIMITED
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
carrying amounts of these financial instruments, with the exception of long-
term obligations, approximate fair value due to their short-term nature. The
carrying amount of long-term obligations approximates fair value based on the
borrowing rates currently available to the Company.
 
 Foreign Currency
 
  All assets and liabilities of the Company's foreign operations are
translated at year-end exchange rates, and revenues and expenses are
translated at average exchange rates for the year in accordance with Statement
of Financial Accounting Standards ("SFAS") No. 52, "Foreign Currency
Translation." Foreign currency transaction gains and losses are included in
the accompanying statement of income and are not material for the two periods
presented.
 
 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 reported amounts of assets and liabilities,
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.
 
2. EMPLOYEE BENEFIT PLAN
 
 401(k) Savings Plan
 
  Substantially all of the Company's full-time U.S. employees are eligible to
participate in the Company's 401(k) savings plan. Contributions to the 401(k)
savings plan are made by the employee. The Company does not contribute to this
plan.
 
3. INCOME TAXES
 
  Moisture Systems Corporation has elected to be taxed as an S corporation for
federal and state income tax purposes. As an S corporation, taxable income of
Moisture Systems Corporation is reported on the individual income tax returns
of its stockholders, although certain states require a corporate-level tax.
Moisture Systems Limited is taxable at U.K. tax rates. The Company provides
for state and foreign income taxes in accordance with SFAS No. 109,
"Accounting for Income Taxes."
 
  Under SFAS No. 109, deferred tax assets or liabilities are computed based on
the differences between the financial reporting basis and income tax basis of
assets and liabilities as measured by the enacted tax laws and rates expected
to be applicable when the differences reverse.
 
 
                                     F-25

 
           MOISTURE SYSTEMS CORPORATION AND MOISTURE SYSTEMS LIMITED
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
  The components of income before provision for income taxes are as follows:
 
<TABLE>
<CAPTION>
                                                                   DEC. 31, 1995
                                                                      THROUGH
                                                              1995 JAN. 25, 1996
                                                              ---- -------------
                                                                (IN THOUSANDS)
   <S>                                                        <C>  <C>
   Domestic.................................................. $580     $117
   Foreign...................................................  102      (51)
                                                              ----     ----
                                                              $682     $ 66
                                                              ====     ====
</TABLE>
 
  The components of the provision for income taxes are as follows:
 
<TABLE>
<CAPTION>
                                                                   DEC. 31, 1995
                                                                      THROUGH
                                                              1995 JAN. 25, 1996
                                                              ---- -------------
                                                                (IN THOUSANDS)
   <S>                                                        <C>  <C>
   Currently payable:
     State................................................... $12      $  2
     Foreign.................................................  21         4
                                                              ---      ----
                                                               33         6
                                                              ---      ----
   Net deferred:
     State...................................................  14       --
                                                              ---      ----
                                                              $47      $  6
                                                              ===      ====
</TABLE>
 
  The provision for income taxes differs from the provision calculated by
applying the statutory federal income tax rate of 34% to income before
provision for income taxes due to the following:
 
<TABLE>
<CAPTION>
                                                              DEC. 31, 1995
                                                                 THROUGH
                                                    1995      JAN. 25, 1995
                                               -------------- -------------
                                                      (IN THOUSANDS)
   <S>                                         <C>            <C>           
   Income tax provision at statutory rate.....     $ 232          $ 22
   Increases (decreases) resulting from:
     Income taxed to shareholders.............      (197)          (18)
     State income taxes.......................        26             1
     Foreign tax differential ................       (14)            1
                                                   -----          ----
                                                   $  47          $  6
                                                   =====          ====
 
  Prepaid income taxes and deferred income taxes in the accompanying balance
sheet consist of the following:
 
<CAPTION>
                                                    1995
                                               --------------
                                               (IN THOUSANDS)
   <S>                                         <C>            
   Prepaid income taxes:
     U.K. building indexation.................     $  90
     Various reserves and accruals............        12
                                                   -----
                                                     102
   Less: Valuation allowance..................       (90)
                                                   -----
                                                   $  12
                                                   =====
   Deferred income taxes:
     Capital lease............................     $  17
                                                   =====
</TABLE>
 
  The valuation allowance was established by Moisture Systems Limited due to
the uncertainty of the realizability of the U.K. building indexation value and
the ability to use U.K. loss carryforwards.
 
 
                                      F-26

 
           MOISTURE SYSTEMS CORPORATION AND MOISTURE SYSTEMS LIMITED
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONCLUDED)
 
4. LONG-TERM OBLIGATION AND OTHER FINANCING ARRANGEMENTS
 
  The Company entered into a building lease that met the requirements for
treatment as a capital lease. The future minimum lease payments under the
agreement are as follows:
 
<TABLE>
<CAPTION>
                                                                  (IN THOUSANDS)
   <S>                                                            <C>
   1996..........................................................      $480
   1997..........................................................       240
                                                                       ----
                                                                        720
   Less: amount representing interest............................        53
                                                                       ----
   Present value of minimum lease payments.......................       667
   Less: current portion.........................................       434
                                                                       ----
   Long-term capital lease obligation............................      $233
                                                                       ====
</TABLE>
 
  As of December 31, 1994, the Company had $1,071,000 outstanding under a note
payable with a bank. Borrowings bore interest at the prime rate plus 1%, which
was 9.5% at December 31, 1994, and were secured by the assets of the Company.
The outstanding balance on this note was paid in June 1995.
 
  In June 1995, the Company entered into a line of credit agreement with a
bank. Borrowings bore interest at the prime rate plus 1%, were secured by the
assets of the Company and were due in April 1996. As of December 30, 1995, the
Company had $723,000 principal amount outstanding under this agreement,
bearing interest at 9.5%. Maximum borrowings during the period were
$1,400,000. The outstanding balance on this agreement was paid upon the sale
of the Company (Note 8).
 
5. OWNERS' INVESTMENT
 
  A dividend to owners of the Company of $381,000 was declared in 1994 and
paid in 1995. A dividend to owners of the Company of $356,000 was declared in
1995.
 
6. SIGNIFICANT CUSTOMER AND EXPORT SALES
 
  Sales to one customer accounted for 11% of the Company's total revenues in
1995.
 
  The Company's export sales to the Netherlands were 12% of total revenues in
1995. All other export sales were 32% of total revenues in 1995.
 
7. RELATED PARTY TRANSACTIONS
 
  The Company has entered into certain transactions with its owners and
affiliated companies. These transactions include sales, purchases, leasing and
short-term borrowings. Any amounts related to these related party
transactions, which have not been eliminated, have been separately presented
or are not material to the financial statements taken as a whole.
 
8. SALE TO THERMEDICS DETECTION INC.
 
  On January 25, 1996, the Company was sold to Thermedics Detection Inc.
 
                                     F-27

 
AUDITOR'S REPORT
 
 Introduction
 
  We have audited the accompanying 1995 and 1994 consolidated and parent
company financial statements of Rutter & Co. B.V. at Enschede. Our audit
procedures also included the disclosures included in the supplementary
information under the caption "United States Generally Accepted Accounting
Principles (U.S. GAAP)". These financial statements and such supplementary
information are the responsibility of the entity's management. Our
responsibility is to express an opinion on these financial statements and such
supplementary information based on our audits.
 
 Scope
 
  We conducted our audit in accordance with auditing standards generally
accepted in the Netherlands and the United States of America. 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 audit provides a reasonable basis for our opinion.
 
 Opinion
 
  In our opinion, the above mentioned financial statements of Rutter & Co.
B.V. give a true and fair view of the financial position of the entity as of
December 31, 1995 and 1994 and of the result for the years then ended in
accordance with accounting principles generally accepted in the Netherlands
and comply with the legal requirements for financial statements as included in
Part 9, Book 2 of the Netherlands Civil Code.
 
  Generally accepted accounting principles in the Netherlands vary in certain
significant respects from generally accepted accounting principles in the
United States of America. Application of generally accepted accounting
principles in the United States of America would have affected net income for
each of the two years in the period ended December 31, 1995 and stockholders'
equity as of December 31, 1995 and 1994, to the extent summarized in the
supplementary information under the caption "United States Generally Accepted
Accounting Principles (U.S. GAAP)". In our opinion, such supplementary
information when considered in relationship to the basic financial statements
taken as a whole presents fairly in all material respects the information set
forth therein.
 
Deloitte & Touche Registeraccountants
 
Almelo, The Netherlands
 
March 13, 1996, except for the
supplementary information under the
caption "United States Generally
Accepted Accounting Principles (U.S.
GAAP)", as to which the date is
December 20, 1996.
 
                                     F-28

 
                               RUTTER & CO. B.V.
 
           CONSOLIDATED BALANCE SHEETS AT DECEMBER 31, 1995 AND 1994
 
                      (EXPRESSED IN NETHERLANDS GUILDERS)
 
<TABLE>
<CAPTION>
                                               1995                1994
                                        ------------------- -------------------
                                                        NLG                 NLG
<S>                                     <C>       <C>       <C>       <C>
ASSETS
Fixed assets
Tangible fixed assets
  Office furniture and equipment.......   128,504             119,565
  Leasehold improvements...............   152,720               5,200
  Other fixed assets...................    28,000   309,224    11,630   136,395
                                        ---------           ---------
Financial fixed assets
  Participations in group companies....       --              839,241
  Other receivables....................    17,539    17,539    17,381   856,622
                                        ---------           ---------
Current assets
Inventories............................           1,430,415           1,548,100
Receivables
  Accounts receivable, net of allow-
   ances of NLG 32,640 in 1995 and NLG
   33,360 in 1994...................... 2,389,051           1,886,393
  Other receivables and prepayments....   383,728             288,090
                                        ---------           ---------
                                                  2,772,779           2,174,483
Cash at bank and in hand...............           1,061,735             819,783
                                                  ---------           ---------
                                                  5,591,692           5,535,383
                                                  =========           =========
GROUP EQUITY, PROVISIONS AND LIABILI-
 TIES
Group equity
Legal entity share in group equity..... 1,795,569           1,259,669
Minority interest......................    22,063              12,471
                                        ---------           ---------
                                                  1,817,632           1,272,140
PROVISIONS
Pensions...............................             286,313             245,625
Short-term liabilities
Accounts payable....................... 1,078,612             831,278
Taxes and social security..............   121,995             100,899
Other payables and accrued liabili-
 ties.................................. 2,287,140           3,085,441
                                        ---------           ---------
                                                  3,487,747           4,017,618
                                                  ---------           ---------
                                                  5,591,692           5,535,383
                                                  =========           =========
</TABLE>
 
                                      F-29

 
                               RUTTER & CO. B.V.
 
CONSOLIDATED PROFIT AND LOSS ACCOUNTS FOR THE YEARS ENDED DECEMBER 31, 1995 AND
                                      1994
 
                      (EXPRESSED IN NETHERLANDS GUILDERS)
 
<TABLE>
<CAPTION>
                                            1995                  1994
                                    --------------------  --------------------
                                                 NLG                   NLG
<S>                                 <C>       <C>         <C>       <C>
Net sales.........................            13,707,261            11,293,027
Cost of materials.................             6,785,566             5,688,601
                                              ----------            ----------
Gross margin......................             6,921,695             5,604,426
Wages and salaries................  1,937,551             1,862,455
Social security costs.............    450,089               493,875
Depreciation and amortization.....    101,537                80,154
Other operating expenses..........  1,476,502             1,448,109
                                    ---------             ---------
Total operating expenses..........             3,965,679             3,884,593
                                              ----------            ----------
Operating result..................             2,956,016             1,719,833
Interest income...................                37,771                26,450
Interest charges..................                57,729                85,288
                                              ----------            ----------
Result on ordinary activities be-
 fore taxation....................             2,936,058             1,660,995
Taxation on result of ordinary
 activites........................             1,057,674               572,478
                                              ----------            ----------
Result on ordinary activities af-
 ter taxation.....................             1,878,384             1,088,517
Minority interest.................                10,522                (7,302)
                                              ----------            ----------
                                               1,888,906             1,081,215
Result non-consolidated companies,
 after taxation...................                  (689)              346,467
                                              ----------            ----------
Net income........................             1,888,217             1,427,682
                                              ==========            ==========
</TABLE>
 
                                      F-30

 
                               RUTTER & CO. B.V.
 
 NOTES TO THE CONSOLIDATED BALANCE SHEETSAND THE CONSOLIDATED PROFIT AND LOSS
                                   ACCOUNTS
 
ACTIVITIES
 
  The principal operations of Rutter & Co. B.V. (the "Company") are commercial
activities including the sale of automatic control systems and machinery-
equipment to customers in various industries in Western Europe as well as the
development of equipment. The Company is also a sales agent in the Netherlands
for a number of foreign suppliers.
 
  The Company was wholly owned by Rutter Holdings B.V. during the periods
covered by these financial statements. On January 25, 1996, Thermedics
Detection Inc. purchased all of the outstanding shares of the Company.
 
ACCOUNTING POLICIES
 
 General
 
  The Company's financial statements are prepared in accordance with
accounting principles generally accepted in the Netherlands, which differ in
certain material respects from U.S. GAAP as summarized in the supplementary
information.
 
  The accounting principles are based on the historical cost convention.
Assets and liabilities are stated at face value if not mentioned otherwise at
the applicable sheet item. Exchange rate differences due to transactions in
currencies other than the Netherlands guilder ("foreign currencies") are
reflected in the consolidated profit and loss account. From time-to-time, the
Company enters into foreign exchange contracts as a hedge against accounts
payable denominated in foreign currencies. The financial statements of foreign
subsidiaries have been translated into Netherlands guilders at the exchange
rate in effect on the respective balance sheet dates.
 
 Consolidation
 
  The following companies are included in the consolidation:
 
<TABLE>
<CAPTION>
              NAME                       PERCENTAGE     STATUTORY DOMICILE
              ----                       ----------     ------------------
     <S>                                 <C>        <C>
     Rutter & Co. B.V...................    100     Enschede (The Netherlands)
     SARL Rutter Instrumentation........     90     Perreux-sur-Marne (France)
     Systech Instruments B.V............     50     Enschede (The Netherlands)
 
  During 1995 the Company signed a letter of intent with Thermedics Detection
Inc., a U.S. company. The letter of intent stated that three of the Company's
subsidiaries would be sold before the date of purchase of the Company's
shares. Since each of the following such subsidiaries was spun-off by the
Company to its shareholder, Rutter Holdings B.V., prior to December 31, 1995,
due to the temporary control of these subsidiaries, the Company has accounted
for such subsidiaries using the equity method:
 
<CAPTION>
              NAME                       PERCENTAGE     STATUTORY DOMICILE
              ----                       ----------     ------------------
     <S>                                 <C>        <C>
     Unitron Systems Terneuzen B.V......     72     Terneuzen (The Netherlands)
     Rutter & Eichholzer AG.............    100     Zug (Switzerland)
     Rutter & Co. GmbH..................    100     Ahaus (Germany)
</TABLE>
 
  All significant intercompany profits, transactions and balances have been
eliminated in consolidation.
 
                                     F-31

 
                               RUTTER & CO. B.V.
 
       VALUATION OF ASSETS AND LIABILITIES AND DETERMINATION OF RESULTS
 
VALUATION OF ASSETS AND LIABILITIES
 
 Tangible fixed assets
 
  The tangible fixed assets are stated at cost less accumulated depreciation.
Depreciation is calculated using the straight-line method based on the
estimated useful lives of the related assets. In the case of leasehold
improvements, the estimated useful lives of the related assets do not exceed
the remaining term of the corresponding lease. The following table presents
the assigned economic lives of the Company's equipment and other fixed assets:
 
<TABLE>
<CAPTION>
               CATEGORY                                  ASSIGNED ECONOMIC LIFE
               --------                                  ----------------------
       <S>                                               <C>
       Leasehold improvements...........................         6 years
       Office furniture and equipment...................       3-5 years
       Other fixed assets...............................       3-5 years
</TABLE>
 
 Financial fixed assets
 
  Other receivables are stated at face value.
 
 Inventories
 
  Equipment inventories are stated at the lower of cost or market (first-in,
first-out method). Allowances are made for slow-moving, obsolete or unsaleable
stock.
 
 Receivables
 
  Receivables are stated at nominal value, less an allowance for possible
uncollectible amounts. Other receivables at December 31, 1995 include the sold
participations Rutter & Eichholzer AG at Zug (Switzerland) and Rutter & Co.
GmbH at Ahaus (Germany).
 
 Provisions
 
  The provision for pension liabilities concerns a past-service liability. The
past-service liability is calculated proportionally based on market rate and
actuarial principles.
 
DETERMINATION OF CONSOLIDATED RESULTS
 
  Determination of the consolidated results is based on the accrual method of
accounting. Profits are recognized as far as they are realized at balance
sheet date, losses and risks are recognized at the moment they can be
ascertained. Sales include the fees charged to customers for delivered goods
or services excluding value added tax.
 
  The cost of materials sold consist of the purchase price of the goods
combined with freight, import duties and realized exchange differences on the
purchase transactions in foreign currencies. The Company is included in a
fiscal unity for corporate income taxes and value added taxes with its parent
company Rutter Holdings B.V. and Pover Gemeenschappelijk Bezit B.V. For these
financial statements, income and value added tax effects for the Company have
been calculated on a stand-alone basis.
 
                                     F-32

 
                               RUTTER & CO. B.V.
 
NOTES TO SPECIFIC ITEMS OF THE CONSOLIDATED BALANCE SHEETS AND THE CONSOLIDATED
                            STATEMENT OF OPERATIONS
 
CONSOLIDATED BALANCE SHEET
 
<TABLE>
<CAPTION>
                                                     OFFICE     OTHER
                                                    FURNITURE OPERATING
                                        LEASEHOLD      AND      FIXED
                                       IMPROVEMENTS EQUIPMENT  ASSETS    TOTAL
                                       ------------ --------- --------- --------
                                           NLG         NLG       NLG      NLG
<S>                                    <C>          <C>       <C>       <C>
FIXED ASSETS
Tangible fixed assets
Book value at January 1, 1994.........     9,695      98,362    19,391   127,448
Additions.............................       --       70,480       --     70,480
                                         -------     -------   -------  --------
                                           9,695     168,842    19,391   197,928
Book value of disposals...............       --          --        --        --
Depreciation..........................     4,495      48,974     7,761    61,230
Foreign currency differences..........       --         (303)      --       (303)
                                         -------     -------   -------  --------
Book value at December 31, 1994.......     5,200     119,565    11,630   136,395
Additions.............................   180,659      66,825    37,395   284,879
                                         -------     -------   -------  --------
                                         185,859     186,390    49,025   421,274
Book value of disposals...............       --          890    11,630    12,520
Depreciation..........................    33,139      59,003     9,395   101,537
Foreign currency differences..........       --        2,007       --      2,007
                                         -------     -------   -------  --------
Book value at December 31, 1995.......   152,720     128,504    28,000   309,224
                                         =======     =======   =======  ========
Accumulated depreciation at December
 31, 1994.............................    83,203     467,416    19,396   570,015
                                         =======     =======   =======  ========
Accumulated depreciation at December
 31, 1995.............................   116,342     524,344     9,395   650,081
                                         =======     =======   =======  ========
FINANCIAL FIXED ASSETS
Participations in group companies
Balance at January 1, 1994............                                   600,199
Net income from subsidiaries..........                                   346,467
Dividends.............................                                  (107,425)
                                                                        --------
Balance at December 31, 1994..........                                   839,241
Net loss from subsidiaries............                                      (689)
                                                                        --------
                                                                         838,552
Less:
  Sale 72%-participation in Unitron
   Systems Terneuzen B.V. at
   Terneuzen..........................                         742,144
  Sale 100%-participation Rutter &
   Eichholzer AG at Zug...............                          41,233
  Sale 100%-participation Rutter & Co.
   GmbH at Ahaus......................                          55,175   838,552
                                                               -------  --------
Balance at December 31, 1995..........                                       --
                                                                        ========
<CAPTION>
                                                                1995      1994
                                                              --------- --------
<S>                                                           <C>       <C>
Other receivables                                                NLG      NLG
Balance at January 1..................                          17,381    24,489
Addition..............................                             158    (7,108)
                                                               -------  --------
Balance at December 31................                          17,539    17,381
                                                               =======  ========
</TABLE>
 
                                      F-33

 
                               RUTTER & CO. B.V.
 
CURRENT ASSETS
 
 Inventories
 
  The inventories consist of purchased equipment and components.
 
 Cash at bank and in hand
 
  This item includes cash and bank balances.
 
CONTINGENT LIABILITIES
 
  . The companies are mostly accomodated in rented premises. Expiration dates
    are varying.
 
  . At balance sheet dates there were no forward purchase contracts in U.S.
    dollars.
 
  . On the basis of operational lease a number of cars is rented. The yearly
    charges are NLG 222,480 (1994: NLG 257,700).
 
  . The Company has a line of credit with a bank which provides up to a
    maximum of NLG 2,500,000. As security for borrowings under the line of
    credit, (assignment of) right of lien is given against:
 
   --receivables;
 
   --equipment;
 
   --company inventories and merchandise inventories;
 
   --shares Unitron Systems Terneuzen B.V.
 
   At the balance sheet dates, the Company did not draw on these facilities.
   The Company, Rutter Holdings B.V., Rutter & Co. GmbH and Pover
   Gemeenschappelijk Bezit B.V. are severally liable.
 
  . The company is severally liable for tax liabilities which result from the
    fiscal unity with group companies for the value added tax and corporate
    tax.
 
  . At December 31, 1995 and 1994, bank guarantees (letters of credit) to the
    amount of NLG 123,320 and NLG 181,404 were outstanding. The guarantees,
    originally expressed in foreign currencies, are converted at the rates of
    exchange at the balance sheet dates.
 
  . A former Italian agent has claimed an amount of NLG 200,000 because of
    the termination of the commercial agency relationship. The concerning
    contracts were closed by Rutter & Eichholzer AG. No guarantees are given
    for this subsidiary by Rutter & Co. B.V. Since Eichholzer AG was sold
    during 1995, management does not believe this matter will materially
    affect results of operations or the financial position of the Company.
 
CONSOLIDATED PROFIT AND LOSS ACCOUNTS
 
 Net-sales
 
  The sales have increased by 22.6%.
 
 Wages and salaries
 
  In 1995, the Company employed 25 people (1994: 24). Under article 383, Book
   2 Civil Code disclosure of the remuneration of the manager is omitted.
 
 Director's fee
 
  Paid director's fees amounted to NLG 10,000 (1994: NLG 20,000).
 
 Social security costs
 
  The social security costs include pension expenses in the amount of NLG
161,041 (1994: NLG 193,863).
 
                                     F-34

 
                               RUTTER & CO. B.V.
 
          PARENT COMPANY BALANCE SHEETS AT DECEMBER 31, 1995 AND 1994
                          (AFTER PROFIT APPROPRIATION)
 
                      (EXPRESSED IN NETHERLANDS GUILDERS)
 
<TABLE>
<CAPTION>
                                              1995                1994
                                       ------------------- -------------------
                                                    NLG                 NLG
<S>                                    <C>       <C>       <C>       <C>
ASSETS
Fixed assets
Tangible fixed assets
  Leasehold improvements..............   152,720               5,200
  Office furniture and equipment......    98,220              83,146
  Other operating fixed assets........    28,000              11,630
                                       ---------           ---------
                                                   278,940              99,976
Financial fixed assets
  Participations in group companies...              60,476             951,483
Current assets
Inventories
  Merchandise inventory...............           1,046,160           1,162,111
Receivables
  Accounts receivable................. 1,904,891           1,494,440
  Group companies.....................   812,340             798,524
  Other receivables and prepayments...   270,784             141,813
                                       ---------           ---------
                                                 2,988,015           2,434,777
Cash at bank and in hand..............             879,865             662,495
                                                 ---------           ---------
                                                 5,253,456           5,310,842
                                                 =========           =========
SHAREHOLDERS' EQUITY, PROVISIONS AND
 LIABILITIES
Shareholders' equity
  Share capital paid up and called
   up.................................   451,000             451,000
  Legally-required reserves...........       --              440,289
  Other reserves...................... 1,361,711             353,879
                                       ---------           ---------
                                                 1,812,711           1,245,168
Provisions
  Pensions                                         286,313             245,625
Short-term liabilities
  Accounts payable....................   923,165             743,904
  Group companies.....................       --            1,909,847
  Taxes and social security...........    12,935              14,357
  Other creditors and accrued liabili-
   ties............................... 2,218,332           1,151,941
                                       ---------           ---------
                                                 3,154,432           3,820,049
                                                 ---------           ---------
                                                 5,253,456           5,310,842
                                                 =========           =========
</TABLE>
 
                                      F-35

 
                               RUTTER & CO. B.V.
 
 PARENT COMPANY PROFIT AND LOSS ACCOUNTS FOR THE YEARS ENDED DECEMBER 31, 1995
                                    AND 1994
 
                      (EXPRESSED IN NETHERLANDS GUILDERS)
 
<TABLE>
<CAPTION>
                                                              1995       1994
                                                            ---------  ---------
                                                               NLG        NLG
<S>                                                         <C>        <C>
Result of participations after taxation....................   (72,455)   411,519
Balance of other profits and losses........................ 1,963,313    992,762
                                                            ---------  ---------
Result after taxation...................................... 1,890,858  1,404,281
                                                            =========  =========
</TABLE>
 
                                      F-36

 
                               RUTTER & CO. B.V.
 
 NOTES TO THE PARENT COMPANY BALANCE SHEETS AND PARENT COMPANY PROFIT AND LOSS
                                   ACCOUNTS
 
ACCOUNTING POLICIES
 
 General
 
  The accounting principles are mentioned in the notes to the consolidated
balance and the consolidated profit and loss account.
 
VALUATION OF ASSETS AND LIABILITIES AND DETERMINATION OF RESULTS
 
 Financial fixed assets
 
  The participations are valued on the basis of the net equity method.
 
 Profit and loss account
 
  The financial statements of the company are included in the consolidated
annual report. Under article 402, title 9 Civil Code it is sufficient to state
a summarized profit and loss account.
 
    NOTES TO SPECIFIC ITEMS OF THE PARENT COMPANY BALANCE SHEETS AND PARENT
                       COMPANY PROFIT AND LOSS ACCOUNTS
 
BALANCE SHEET
 
 
<TABLE>
<CAPTION>
                                                    OFFICE     OTHER
                                                   FURNITURE OPERATING
                                       LEASEHOLD      AND      FIXED
                                      IMPROVEMENTS EQUIPMENT  ASSETS    TOTAL
                                      ------------ --------- --------- -------
                                          NLG         NLG       NLG      NLG
FIXED ASSETS
<S>                                   <C>          <C>       <C>       <C>
Tangible fixed assets
Book value at January 1, 1994........     9,695      76,887   19,391   105,973
Additions............................       --       47,159      --     47,159
                                        -------     -------   ------   -------
                                          9,695     124,046   19,391   153,132
Book value of disposals..............       --          --       --        --
Depreciation.........................     4,495      40,900    7,761    53,156
                                        -------     -------   ------   -------
Book value at December 31, 1994......     5,200      83,146   11,630    99,976
Additions............................   180,659      65,341   37,395   283,395
                                        -------     -------   ------   -------
                                        185,859     148,487   49,025   383,371
Book value of disposals..............       --          --    11,630    11,630
Depreciation.........................    33,139      50,267    9,395    92,801
                                        -------     -------   ------   -------
Book value at December 31, 1995......   152,720      98,220   28,000   278,940
                                        =======     =======   ======   =======
Accumulated depreciation at December
 31, 1994............................    83,203     404,863   19,396   507,462
                                        =======     =======   ======   =======
Accumulated depreciation at December
 31, 1995............................   116,342     455,130    9,395   580,867
                                        =======     =======   ======   =======
</TABLE>
 
                                     F-37

 
                               RUTTER & CO. B.V.
 
<TABLE>
<CAPTION>
                                                                        NLG
                                                                      --------
   <S>                                                        <C>     <C>
   FINANCIAL FIXED ASSETS
   Participations in group companies
   Balance at January 1, 1994...............................           647,388
   Dividends................................................          (107,424)
   Results of participations after taxation.................           411,519
                                                                      --------
   Balance at December 31, 1994.............................           951,483
   Add:
     Purchase 50%-participation in Systech Instruments B.V.
      at Enschede...........................................            20,000
                                                                      --------
                                                                       971,483
   Less:
     Sale 72%-participation in Unitron Systems Terneuzen
      B.V. at Terneuzen (realizable value)..................  742,144
     Sale 100%-participation Rutter & Eichholzer AG at Zug
      (realizable value)....................................   41,233
     Sale 100%-participation Rutter & Co. GmbH at Ahaus (re-
      alizable value).......................................   55,175  838,552
                                                              ------- --------
                                                                       132,931
   Add:
     Results of participations after taxation...............           (72,455)
                                                                      --------
   Balance at December 31, 1995.............................            60,476
                                                                      ========
</TABLE>
 
 Specification
 
<TABLE>
<CAPTION>
     PART OF THE ISSUED CAPITAL   NOMINAL PAID SHARE CAPITAL       NAME AND DOMICILE
     --------------------------   --------------------------       -----------------
                 %
     <S>                          <C>                        <C>
                 90                     Frfrs 900,000        SARL Rutter Instrumentation
                                                              at Perreux-sur-Marne
                 50                        NLG 40,000        Systech Instruments B.V. at
                                                              Enschede
</TABLE>
 
                                      F-38

 
                               RUTTER & CO. B.V.
 
SHAREHOLDERS' EQUITY
 
  Differences exist between parent company shareholders' equity and group
equity included in the consolidated financial statements. These differences
are due to intercompany profits included in the inventory of a subsidiary,
which are eliminated in the consolidation.
 
<TABLE>
<CAPTION>
                                                                1995     1994
                                                              --------- -------
                                                                 NLG      NLG
     <S>                                                      <C>       <C>
     Share capital paid up and called up
     The authorized share capital consists of
     500 shares each NLG 1000,
     451 shares were issued and fully paid.
     Legally-required reserves
     Balance at January 1....................................   440,289 136,019
     Proposed appropriation for the year.....................       --  304,270
     Release in favor of the other reserve...................   440,289     --
                                                              --------- -------
     Balance at December 31..................................       --  440,289
                                                              ========= =======
     Other reserve
     Balance at January 1....................................   353,879 272,796
     From legally-required reserves..........................   440,289     --
     Write-off goodwill......................................       --  (18,928)
     Proposed appropriation for the year.....................   567,543 100,011
                                                              --------- -------
     Balance at December 31.................................. 1,361,711 353,879
                                                              ========= =======
</TABLE>
 
PROFIT AND LOSS ACCOUNTS
 
<TABLE>
<CAPTION>
                                                                 1995     1994
                                                                -------  -------
                                                                  NLG      NLG
     <S>                                                        <C>      <C>
     Result of participations after taxation
     Share result group companies.............................. (71,766)  65,052
     Share result other participations.........................    (689) 346,467
                                                                -------  -------
                                                                (72,455) 411,519
                                                                =======  =======
</TABLE>
 
The management board: L.L.A.Pover
 
Enschede, The Netherlands, March 13, 1996
 
                                     F-39

 
                               RUTTER & CO. B.V.
 
                           SUPPLEMENTARY INFORMATION
 
PROVISIONS OF THE ARTICLES OF ASSOCIATION ON THE SUBJECT OF PROFIT
APPROPRIATION
 
 Article 14
 
  1. The profits are at the disposal of the general meeting of shareholders.
 
2. The company can only distribute if the shareholders' equity exceeds the
      share capital paid up and called up added with the legally-required
      reserves.
 
3. Distribution of profits takes place after the adoption of the financial
      statements from which it appears that distribution is allowed.
 
4. The general meeting of shareholders can between times decide to make a
      distribution, if the requirements of Article 2 are met.
 
POST-BALANCE-SHEET EVENTS
 
  Due to the sale of the shares of the Company to Thermedics Detection Inc.,
credit facilities are cancelled at the beginning of 1996. Hereby existing
securities are given free.
 
PROFIT APPROPRIATION 1995
 
  The profit over the year 1995 in the amount of NLG 1,890,858 is at the
disposal of the general meeting of shareholders. The managent board proposes
to appropriate the net result as follows:
 
<TABLE>
<CAPTION>
                                                                          NLG
                                                                       ---------
     <S>                                                               <C>
     Interim dividend.................................................   742,144
     Final dividend...................................................   581,171
     Allocation to other reserves (retained earnings).................   567,543
                                                                       ---------
                                                                       1,890,858
                                                                       =========
</TABLE>
 
  This proposal is comprehended in the financial statements.
 
                                     F-40

 
                               RUTTER & CO. B.V.
 
      UNITED STATES GENERALLY ACCEPTED ACCOUNTING PRINCIPLES (U.S. GAAP)
 
a. Basis of Presentation
 
    The  accompanying  financial  statements  are  presented  using  Netherlands
generally  accepted   accounting   principles  (GAAP)  and  are  denominated  in
Netherlands guilders. The exchange rate at December 31, 1995 was 1.60. Inclusion
of separate  parent  company  financial  statements  as a component of the basic
financial  statements  is a  requirement  under  Netherlands  GAAP.  No  similar
requirement exists under U.S. GAAP.
 
b. Scope of Consolidation and Related Party Transactions
 
    The  Netherlands  GAAP  financial  statements  include the accounts of three
subsidiaries using the equity method of consolidation during 1994.
 
  Each of the three subsidiaries was spun-off by the Company to its
shareholder, Rutter Holdings B.V., during the year ended December 31, 1995.
Such transactions were undertaken in advance of the sale of the ownership
interests change in ownership of the Company in 1996. For U.S. GAAP purposes,
such subsidiaries represent a change in the reporting entity, since the
Company and the subsidiaries, which were spun-off, have been managed and
financed historically as if they were autonomous, have no more than incidental
common facilities and costs, will be operated and financed autonomously after
the spin-off, and will not have material financial commitments, guarantees, or
contingent liabilities to each other after the spin-off. Accordingly, the U.S.
GAAP financial statements are presented as if the Company never had an
investment in these subsidiaries.
 
  The financial statements of Systech Instruments B.V. are fully consolidated
in the financial statements prepared under Netherlands GAAP. Under U.S. GAAP
this subsidiary would have been accounted for using the equity method of
accounting. Systech Instruments B.V. did not have any activities during 1995.
The balances consolidated for Systech Instruments B.V. are immaterial to the
consolidated balances.
 
c. Pension plans
 
  In the Netherlands, the Company sponsors a defined benefit pension plan for
substantially all of its Netherlands employees. SFAS 87, the U.S. accounting
principles for pensions, uses accrual assumptions, including estimated future
salary increases, when calculating pension expense. For Netherlands GAAP
purposes, determination of pension expense does not take future salary
increases into account, but does consider prior back service costs and lower
discount rates.
 
  In France, legally required retirement indemnities exist for U.S. GAAP
purposes. However, such amounts are immaterial and have not been provided.
 
d. Income taxes
 
  Generally, temporary differences between financial statement and tax
reporting do not exist in the Netherlands GAAP accounts. Accordingly, deferred
income taxes which have been provided relate to the temporary differences
resulting from other U.S. GAAP reconciling items.
 
e. Cumulative translation adjustment
 
  Translation adjustments for income statement items under Netherlands GAAP
were calculated using the exchange rate at the applicable balance sheet dates.
Under SFAS 52 of U.S. GAAP, the translation for income statement items is to
be calculated using the weighted average exchange rate for the year. For
purposes of applying U.S. GAAP, the SFAS 52 approach was applied starting at
January 1, 1989. Since this date, the year-end exchange rate has approximated
the average rate, resulting in no material differences in any year.
Accordingly, no cumulative translation adjustment at December 31, 1995 and
1994 has been recorded.
 
f. Fair value of financial instruments
 
  The carrying amount of cash, accounts receivable and accounts payable
approximates fair value.
 
g. Use of estimates
 
  The preparation of the Company's consolidated financial statements requires
management to make estimates and assumptions that could affect the reported
amounts of assets and liabilities, the disclosure of contingent assets
 
                                     F-41

 
                               RUTTER & CO. B.V.
 
and liabilities at the balance sheet dates, and the reported amounts of
revenue and expense during the reported periods. Actual results may vary from
such estimates.
 
h. Operating leases
 
  The Company leases certain facilities and automobiles under operating
leases. As of December 31, 1995, the minimum annual rental commitments are as
follows:
 
<TABLE>
<CAPTION>
                                                                          NLG
                                                                       ---------
<S>                                                                    <C>
1996..................................................................   313,230
1997..................................................................   317,561
1998..................................................................   233,316
1999..................................................................   133,032
2000..................................................................    71,629
Thereafter............................................................       --
                                                                       ---------
  Total............................................................... 1,068,768
                                                                       =========
</TABLE>
 
  Rental expense was NLG 339,245 and NLG 306,774 for the years ended December
31, 1995 and 1994, respectively.
 
i. New accounting pronouncement
 
  In March 1995, the United States Financial Accounting Standards Board issued
SFAS 121 "Accounting for the Impairment of Long-Lived Assets and for Long-
Lived Assets to Be Disposed Of", which is applicable to the Company beginning
in 1996. Management believes that application of SFAS 121 will not result in
any adjustments to the carrying value of the Company's long-lived assets.
 
j. Stockholders' equity
 
  Differences exist between parent company shareholders' equity and group
equity included in the consolidated financial statements prepared under
Netherlands GAAP due to intercompany profits included in the inventory of a
subsidiary, which are eliminated in the consolidation. On a U.S. GAAP basis,
parent company equity would be the same as consolidated equity.
 
k. Dividends
 
  Management of the Company has proposed a final dividend of NLG 581,171 and
NLG 1,000,000 at December 31, 1995 and 1994, respectively. These proposed
dividends are accrued in the financial statements prepared under Netherlands
GAAP. Since these proposed dividends are subject to the authorization of the
general meeting of shareholders, these dividends would not be presented as a
liability in the financial statements prepared under U.S. GAAP.
 
l. Netherlands GAAP--U.S. GAAP reconciliation
 
  The following is a summary of the significant adjustments to net income for
the years ended December 31, 1995 and 1994 and to stockholders' equity as of
December 31, 1995 and 1994, which would be required if U.S. GAAP had been
applied instead of Netherlands GAAP in the financial statements:
 
<TABLE>
<CAPTION>
                                                         FOR THE YEARS ENDED
                                                            DECEMBER 31,
                                                         --------------------
                                                           1995       1994
                                                         ---------  ---------
                                                            NLG        NLG
<S>                                                      <C>        <C>
Net income according to the consolidated financial
 statements prepared under Netherlands GAAP............. 1,888,217  1,427,682
U.S. GAAP adjustments:
  Increase due to effects of applying SFAS 87,
   "Employers' Accounting for Pensions".................   156,525    177,105
  Decrease due to effects of applying SFAS 109,
   "Accounting for Income Taxes"........................   (54,780)   (61,987)
  Decrease due to elimination of net income of
   subsidiaries spun-off................................       --    (346,467)
                                                         ---------  ---------
  Net income in accordance with U.S. GAAP............... 1,989,962  1,196,333
                                                         =========  =========
</TABLE>
 
 
                                     F-42

 
                               RUTTER & CO. B.V.
  A reconciliation of legal entity share in group equity in the balance sheet
from Netherlands GAAP reporting to stockholder's equity in U.S. GAAP reporting
is as follows:
<TABLE>
<CAPTION>
                                                          AS OF DECEMBER 31,
                                                          --------------------
                                                            1995       1994
                                                          ---------  ---------
                                                             NLG        NLG
<S>                                                       <C>        <C>
Legal entity share in group equity according to the
 consolidated financial statements prepared under
 Netherlands GAAP........................................ 1,795,569  1,259,669
U.S. GAAP adjustments:
  Increase due to effects of applying SFAS 87,
   "Employers' Accounting for Pensions"..................   524,379    367,867
  Decrease due to effects of applying SFAS 109,
   "Accounting for Income Taxes".........................  (183,533)  (128,753)
  Increase due to accrual of proposed final dividends....   581,171  1,000,000
  Other..................................................    29,015        --
                                                          ---------  ---------
Stockholder's equity in accordance with U.S. GAAP........ 2,746,601  2,498,783
                                                          =========  =========
</TABLE>
 
  The accompanying consolidated statements of stockholder's equity has been
prepared in accordance with U.S. GAAP.
 
CONSOLIDATED STATEMENTS OF STOCKHOLDER'S EQUITY FOR THE YEARS ENDED DECEMBER
31, 1995 AND 1994
 
<TABLE>
<CAPTION>
                                  NUMBER OF   SHARE
                                  ORDINARY   CAPITAL                  TOTAL
                                   SHARES    AT PAR  ACCUMULATED  STOCKHOLDER'S
                                 OUTSTANDING  VALUE   EARNINGS       EQUITY
                                 ----------- ------- -----------  -------------
                                               NLG       NLG           NLG
<S>                              <C>         <C>     <C>          <C>
Balance January 1, 1994.........     451     451,000  1,651,450     2,102,450
Net income......................     --          --   1,196,333     1,196,333
Dividend paid...................     --          --    (800,000)     (800,000)
                                     ---     ------- ----------    ----------
Balance December 31, 1994.......     451     451,000  2,047,783     2,498,783
Net income......................     --          --   1,989,962     1,989,962
Dividends paid..................     --          --  (1,742,144)   (1,742,144)
                                     ---     ------- ----------    ----------
Balance December 31, 1995.......     451     451,000  2,295,601     2,746,601
                                     ===     ======= ==========    ==========
</TABLE>
 
                                      F-43

 
                               RUTTER & CO. B.V.
 
  Cash flow data is not required to be prepared under Netherlands GAAP. The
accompanying statements of cash flows have been prepared in accordance with
U.S. GAAP.
 
CONSOLIDATED STATEMENTS OF CASH FLOWS FOR THE YEARS ENDED DECEMBER 31, 1995
AND 1994
 
<TABLE>
<CAPTION>
                                                          1995        1994
                                                       ----------  ----------
                                                          NLG         NLG
<S>                                                    <C>         <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income............................................  1,989,962   1,196,333
Adjustment to reconcile net income to net cash flows
 from operating activities:
  Minority interest...................................      9,592      12,471
  Depreciation........................................    101,537      67,433
  Amortization of goodwill............................        --       37,853
Effects of changes in assets and liabilities:
  Increase in accounts receivable.....................   (502,658)   (480,984)
  Decrease (increase) in inventories..................    117,685     (64,264)
  Increase in other current assets....................   (211,462)    (81,492)
  (Decrease) increase in accrued liabilities..........   (408,487)    178,432
  Increase in accounts payable........................    247,334     167,400
  Increase in deferred taxes..........................     54,780      61,987
  Increase in taxes payable...........................     21,096      27,266
                                                       ----------  ----------
Net cash provided by operating activities.............  1,419,379   1,122,435
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures..................................   (274,366)    (76,380)
Decrease in investments...............................        --      107,425
Proceeds from sale of subsidiaries....................    839,241         --
Decrease (increase) in other receivables..............       (158)      7,108
                                                       ----------  ----------
Net cash provided by investing activities.............    564,717      38,153
CASH FLOW FROM FINANCING ACTIVITIES:
Payments on long term debt............................        --     (300,000)
Dividends paid........................................ (1,742,144)   (800,000)
                                                       ----------  ----------
Net cash used in financing activities................. (1,742,144) (1,100,000)
NET CASH FLOWS........................................    241,952      60,588
CASH AT BANK AND IN HAND AT BEGINNING OF YEAR.........    819,783     759,195
                                                       ----------  ----------
CASH AT BANK AND IN HAND AT END OF YEAR...............  1,061,735     819,783
                                                       ==========  ==========
</TABLE>
 
                                     F-44

 
                           THERMEDICS DETECTION INC.
 
               PRO FORMA COMBINED CONDENSED STATEMENT OF INCOME
                         YEAR ENDED DECEMBER 28, 1996
                                  (UNAUDITED)
 
  On January 25, 1996, Thermedics Detection Inc. (the "Company") acquired the
assets of Moisture Systems Corporation and certain affiliated companies
(collectively, "Moisture Systems"), and the stock of Rutter & Co. B.V.
("Rutter") for a total purchase price of $21,668,000 in cash, which included
the repayment of $700,000 of debt. To finance these acquisitions, the Company
borrowed $21,200,000 from Thermedics Inc. ("Thermedics") pursuant to a
promissory note (the "promissory note") due March 1998, and bearing interest
at the 90-day Commercial Paper Composite Rate plus 25 basis points, set at the
beginning of each quarter. These acquisitions have been accounted for using
the purchase method of accounting.
 
  The following unaudited pro forma combined condensed statement of income
sets forth the results of operations for the year ended December 28, 1996, as
if the acquisitions of Moisture Systems and Rutter had occurred on January 1,
1996. Moisture Systems and Rutter's historical statements of income represent
their results for the 25 day period from January 1, 1996 through January 25,
1996, the date of acquisition by the Company. Rutter's historical consolidated
statement of income, which is denominated in Netherlands guilders, has been
translated at the average exchange rate of .5903 for the year ended December
28, 1996. The pro forma statement of income is not necessarily indicative of
future operations or the actual results that would have occurred had the
acquisitions of Moisture Systems and Rutter been made on January 1, 1996. This
statement should be read in conjunction with the accompanying notes and the
respective historical financial statements and related notes of the Company,
Moisture Systems and Rutter appearing elsewhere in this Prospectus.
 
<TABLE>
<CAPTION>
                                        HISTORICAL              PRO FORMA
                                -------------------------- --------------------
                                THERMEDICS MOISTURE
                                DETECTION  SYSTEMS  RUTTER ADJUSTMENTS COMBINED
                                ---------- -------- ------ ----------- --------
                                   (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
<S>                             <C>        <C>      <C>    <C>         <C>
Revenues.......................  $43,750    $1,141   $593     $(187)   $45,297
                                 -------    ------   ----     -----    -------
Costs and Operating Expenses:
  Cost of revenues.............   22,150       563    267      (187)    22,793
  Selling, general and
   administrative expenses.....   15,525       495    168        45     16,233
  Research and development
   expenses....................    4,608       --     --        --       4,608
                                 -------    ------   ----     -----    -------
                                  42,283     1,058    435      (142)    43,634
                                 -------    ------   ----     -----    -------
Operating Income...............    1,467        83    158       (45)     1,663
Interest Income................      229         1      1       --         231
Interest Expense...............   (1,119)      (18)   --        (83)    (1,220)
Other Income...................       12       --      43       --          55
                                 -------    ------   ----     -----    -------
Income Before Provision for
 Income Taxes..................      589        66    202      (128)       729
Provision for Income Taxes.....      227         6     59       (1)        291
                                 -------    ------   ----     -----    -------
Net Income.....................  $   362    $   60   $143     $(127)   $   438
                                 =======    ======   ====     =====    =======
Earnings per Share.............  $   .04                               $   .04
                                 =======                               =======
Weighted Average Shares........   10,320                                10,320
                                 =======                               =======
</TABLE>
 
                                     F-45





 
                           THERMEDICS DETECTION INC.
 
            NOTE TO PRO FORMA COMBINED CONDENSED STATEMENT OF INCOME
                                  (UNAUDITED)
NOTE 1--PRO FORMA ADJUSTMENTS TO PRO FORMA COMBINED CONDENSED STATEMENT OF
      INCOME FOR THE YEAR ENDED DECEMBER 28, 1996 (IN THOUSANDS, EXCEPT IN
      TEXT)
 
<TABLE>
<CAPTION>
                                                                                                DEBIT (CREDIT)
                                                                                                --------------
<S>                                                                                             <C>
REVENUES
Elimination of intercompany sales between Moisture Systems and Rutter.........................       $187
                                                                                                     ----
COST OF REVENUES
Elimination of costs associated with intercompany sales between Moisture Systems and Rutter...       (187)
                                                                                                     ----
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES
Service fee of 1.0% of the revenues of Moisture Systems and Rutter for services provided under
 a services agreement between the Company and Thermo Electron.................................         15
Amortization over 40 years of $11,569,000 and $5,757,000 of cost in excess of net assets of
 acquired companies created by the acquisitions of Moisture Systems and Rutter, respectively..         30
                                                                                                     ----
                                                                                                       45
                                                                                                     ----
INTEREST EXPENSE
Interest expense on the $21,200,000 promissory note issued to Thermedics to finance the
 acquisitions of Moisture Systems and Rutter, calculated at an average interest rate of
 5.74%........................................................................................         83
                                                                                                     ----
PROVISION FOR INCOME TAXES
Income tax benefit associated with the adjustments above (excluding nondeductible amortization
 of cost in excess of net assets of acquired companies relating to Rutter), calculated at the
 Company's statutory income tax rate of 38%...................................................        (45)
Income tax provision associated with the earnings of Moisture Systems Corporation, an S
 corporation, calculated at the Company's statutory income tax rate of 38%....................         44
                                                                                                     ----
                                                                                                       (1)
                                                                                                     ----
</TABLE>
 
 
                                      F-46









================================================================================

    NO DEALER,  SALESMAN  OR ANY OTHER  PERSON HAS BEEN  AUTHORIZED  TO GIVE ANY
INFORMATION  OR TO MAKE ANY  REPRESENTATIONS  NOT CONTAINED IN THIS  PROSPECTUS,
AND, IF GIVEN OR MADE, SUCH  INFORMATION OR  REPRESENTATIONS  MUST NOT BE RELIED
UPON AS  HAVING  BEEN  AUTHORIZED  BY THE  COMPANY.  THIS  PROSPECTUS  DOES  NOT
CONSTITUTE AN OFFER OF ANY SECURITIES OTHER THAN THOSE TO WHICH IT RELATES OR AN
OFFER TO SELL,  OR A  SOLICITATION  OF AN OFFER  TO BUY,  TO ANY  PERSON  IN ANY
JURISDICTION WHERE SUCH AN OFFER OR SOLICITATION WOULD BE UNLAWFUL.  NEITHER THE
DELIVERY  OF THIS  PROSPECTUS  NOR ANY SALE  MADE  HEREUNDER  SHALL,  UNDER  ANY
CIRCUMSTANCES,  CREATE ANY IMPLICATION THAT THE INFORMATION  CONTAINED HEREIN IS
CORRECT AS OF ANY TIME SUBSEQUENT TO THE DATE HEREOF.

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

                                TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                           <C>
The Company                                                                    2
Risk Factors                                                                   3
Price Range of Common Stock                                                    8
Dividend Policy                                                                8
Selected Quarterly Financial Data
  (Unaudited)                                                                  9
Capitalization                                                                10
Selected Financial Information                                                11
Management's Discussion and Analysis of
  Financial Condition and Results of
  Operations                                                                  12
Business                                                                      16
Relationship with Thermo Electron
  and Thermedics                                                              25
Transactions with Affiliates                                                  27
Management                                                                    28
Security Ownership of Certain Beneficial
  Owners and Management                                                       34
Selling Shareholders                                                          36
Sale of Shares                                                                38
Description of Capital Stock                                                  38
Shares Eligible for Future Sale                                               39
Legal Opinion                                                                 40
Experts                                                                       40
Additional Information                                                        40
Index to Financial Statements                                                F-1
</TABLE>

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


    UNTIL  __________  , 1997 (25 DAYS AFTER THE DATE OF THIS  PROSPECTUS),  ALL
DEALERS  EFFECTING  TRANSACTIONS  IN THE REGISTERED  SECURITIES,  WHETHER OR NOT
PARTICIPATING  IN THIS  DISTRIBUTION,  MAY BE REQUIRED TO DELIVER A  PROSPECTUS.
THIS IS IN ADDITION TO THE  OBLIGATION  OF DEALERS TO DELIVER A PROSPECTUS  WHEN
ACTING  AS  UNDERWRITERS  AND  WITH  RESPECT  TO  THEIR  UNSOLD   ALLOTMENTS  OR
SUBSCRIPTIONS.




                                 643,500 SHARES

                                     [Logo]

                                  COMMON STOCK

                                   PROSPECTUS

                               ____________ , 1997


================================================================================








                                     PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 13. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

    The following  table sets forth the various  expenses in connection with the
sale and distribution of the securities being registered.  All amounts shown are
estimated   except  the  Securities  and  Exchange   Commission   ("Commission")
registration fee.

<TABLE>
<CAPTION>
                                                                         AMOUNT
                                                                         ------
<S>                                                                     <C>
Securities and Exchange Commission registration fee                    $  2,286
Legal fees and expenses                                                   5,000
Accounting fees and expenses                                              5,000
Printing and engraving expenses                                          15,000
Miscellaneous                                                             2,000
  Total                                                                 $29,286
</TABLE>

ITEM 14. INDEMNIFICATION OF DIRECTORS AND OFFICERS

    The  Massachusetts  Business  Corporation Law and the Company's  Articles of
Organization  and By-Laws  limit the  monetary  liability  of  directors  to the
Company and to its stockholders and provide for indemnification of the Company's
officers and directors for  liabilities and expenses that they may incur in such
capacities.  In general,  officers and directors are indemnified with respect to
actions  taken in good faith in a manner  reasonably  believed  to be in, or not
opposed to, the best interests of the Company,  and with respect to any criminal
action or proceeding,  actions that the  indemnitee  had no reasonable  cause to
believe were unlawful. The Company also has indemnification  agreements with its
directors and officers that provide for the maximum  indemnification  allowed by
law.  Reference is made to the Company's  Articles of Organization,  By-Laws and
form of  Indemnification  Agreement for Officers and Directors  incorporated  by
reference as Exhibits 3.1, 3.2 and 10.10 hereto, respectively.

    Thermo  Electron  Corporation  has an  insurance  policy  which  insures the
directors and officers of Thermo  Electron and its  subsidiaries,  including the
Company,  against certain liabilities which might be incurred in connection with
the performance of their duties.

    The Selling  Shareholders  are  obligated  under the Purchase  Agreements to
indemnify Directors,  officers and controlling persons of the Registrant against
certain liabilities, including liabilities under the Securities Act.

ITEM 15. RECENT SALES OF UNREGISTERED SECURITIES

    In March and  November  1996,  pursuant to Stock  Purchase  Agreements  with
certain  investors,  the  Registrant  sold an aggregate of 683,500 shares of its
Common Stock for an aggregate  gross purchase  price of $7,122,625.  All of such
investors  were  accredited  investors  (as  defined in  Regulation  D) who made
appropriate  investment  representations.  Such sales were made in reliance upon
the exemption from the  registration  provisions of the Securities Act set forth
in Section  4(2) thereof and  Regulation  D  thereunder  relative to sales by an
issuer not involving any public offering.

ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

    (a) Exhibits

    See the Exhibit Index  included  immediately  preceding the exhibits to this
Registration Statement.



                                      II-1








    (b) Financial Statement Schedules

    The  Financial  Statement  Schedules  as of March 29, 1997 and the Report of
Independent   Public   Accountants  on  such  schedules  are  included  in  this
Registration  Statement.  All other  schedules are omitted  because they are not
applicable or are not required under Regulation S-X.

ITEM 17. UNDERTAKINGS

    (a) The undersigned Registrant hereby undertakes:

       (1)  To file,  during any period in which offers or sales are being made,
            a post-effective amendment to this registration statement:

           (i) To include any prospectus required by Section 10(a)(3) of
       the Securities Act of 1933;

           (ii)  To reflect in the  prospectus any facts or events arising after
                 the effective date of the  registration  statement (or the most
                 recent post-effective amendment thereof) which, individually or
                 in  the  aggregate,  represent  a  fundamental  change  in  the
                 information   set   forth   in  the   registration   statement.
                 Notwithstanding  the  foregoing,  any  increase  or decrease in
                 volume of  securities  offered  (if the total  dollar  value of
                 securities  offered would not exceed that which was registered)
                 and any  deviation  from the low or high  end of the  estimated
                 maximum  offering  range  may  be  reflected  in  the  form  of
                 prospectus  filed with the  Commission  pursuant to Rule 424(b)
                 if, in the aggregate, the changes in volume and price represent
                 no  more  than  20  percent  change  in the  maximum  aggregate
                 offering price set forth in the  "Calculation  of  Registration
                 Fee" table in the effective registration statement;

           (iii) To  include any material  information  with respect to the plan
                 of  distribution  not previously  disclosed in the registration
                 statement or any material  change to such  information  in the
                 registration statement.

       (2)  That,  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.

       (3)  To remove from  registration by means of a post-effective  amendment
            any of the securities  being  registered  which remain unsold at the
            termination of the offering.

    (b) Insofar as indemnification  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 Act
and is, therefore,  unenforceable. In the event that a claim for indemnification
against 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 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 Act and will be governed by the final adjudication of
such issue.


                                      II-2




                                   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 WALTHAM, COMMONWEALTH OF
MASSACHUSETTS, ON THIS 23RD DAY OF JULY, 1997.

                                            THERMEDICS DETECTION INC.


                                            By: /s/ JEFFREY J. LANGAN
                                                --------------------------------
                                                    JEFFREY J. LANGAN
                                                   PRESIDENT AND CHIEF
                                                    EXECUTIVE OFFICER


                             POWER OF ATTORNEY

    Each of the undersigned  Directors and Officers of Thermedics Detection Inc.
hereby appoints John N. Hatsopoulos,  Paul F. Kelleher, Melissa F. Riordan, Seth
H.  Hoogasian  and  Sandra L.  Lambert,  and each of them,  his true and  lawful
attorneys-in-fact  and agents,  with full power of substitution,  for him and in
his  name,  place  and  stead,  in any and all  capacities,  to sign any and all
amendments (including post-effective amendments) to this Registration Statement,
and to file the same, with all exhibits thereto, and all documents in connection
therewith,  with the  Securities  and Exchange  Commission,  granting  unto said
attorneys-in-fact  and agents,  and each of them, 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  and  agents  or any of them,  or their or his  substitute  or
substitutes, may lawfully do or cause to be done by virtue thereof.

    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                             TITLE                         DATE
                ---------                             -----                         ----
      <S>                              <C>                                        <C>
       /s/ JEFFREY J. LANGAN  
- -----------------------------------    President, Chief Executive Officer and     July 23, 1997
           JEFFREY J. LANGAN             Director


      /s/ JOHN N. HATSOPOULOS          Vice President, Chief Financial Officer    July 23, 1997
- -----------------------------------      and Director
          JOHN N. HATSOPOULOS                


        /s/ PAUL F. KELLEHER           Chief Accounting Officer                   July 23, 1997
- -----------------------------------
            PAUL F. KELLEHER


        /s/ JOHN W. WOOD JR.           Director                                   July 23, 1997
- -----------------------------------
            JOHN W. WOOD JR.


- -----------------------------------    Director                                   July   , 1997
            MORTON COLLINS


- -----------------------------------    Director                                   July   , 1997
           MATTHEW C. WEISMAN
</TABLE>


                                      II-3



                                                                      SCHEDULE I

                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To THERMEDICS DETECTION INC.:

    We have audited,  in accordance with generally accepted auditing  standards,
the consolidated  financial  statements of Thermedics Detection Inc. included in
Thermedics  Detection  Inc.'s Form S-1 and have issued our report  thereon dated
February 3, 1997.  Our audits were made for the purpose of forming an opinion on
the  basic  consolidated  financial  statements  taken  as a  whole.  Thermedics
Detection  Inc.'s  Schedule of Valuation and  Qualifying  Accounts,  included in
Schedule II on page S-2, is the  responsibility of the Company's  management and
is  presented  for  purposes  of  complying  with the  Securities  and  Exchange
Commission's  rules  and  is  not  part  of  the  basic  consolidated  financial
statements.  This schedule has been subjected to the auditing procedures applied
in the  audits  of the  basic  consolidated  financial  statements  and,  in our
opinion, fairly states, in all material respects, the financial data required to
be set forth therein in relation to the basic consolidated  financial statements
taken as a whole.

                                         ARTHUR ANDERSEN LLP

Boston, Massachusetts
February 3, 1997


                                      S-1






                                                                     SCHEDULE II

                         THERMEDICS DETECTION INC.
                     VALUATION AND QUALIFYING ACCOUNTS
                              (IN THOUSANDS)


<TABLE>
<CAPTION>
                                            BALANCE AT    PROVISION                                           BALANCE
                                             BEGINNING   CHARGED TO                ACCOUNTS     ACCOUNTS      AT END
DESCRIPTION                                  OF PERIOD     EXPENSE    OTHER (a)   RECOVERED   WRITTEN OFF    OF PERIOD
- -----------                                  ---------     -------    ---------   ---------   -----------    ---------
<S>                                          <C>           <C>        <C>         <C>         <C>            <C>
YEAR ENDED DECEMBER 31, 1994
 Allowance for Doubtful Accounts               $431         $128         $  --       $  --       $  (12)      $   547

YEAR ENDED DECEMBER 30, 1995
 Allowance for Doubtful Accounts               $547         $ 98         $  --       $  --       $ (129)      $   516

YEAR ENDED DECEMBER 28, 1996
 Allowance for Doubtful Accounts               $516         $582         $122        $167        $ (172)      $1,215
</TABLE>


(a) Includes  allowance of businesses  acquired  during the year as described in
    Note 2 to  Consolidated  Financial  Statements  included  elsewhere  in this
    Prospectus and foreign currency translation adjustment.


                                      S-2







                               EXHIBIT INDEX

    Each exhibit listed below which is marked by an asterisk (*) is incorporated
by  reference  to  the   correspondingly   numbered  exhibit  to  the  Company's
Registration Statement on Form S-1 (File No. 333-19199).


<TABLE>
<CAPTION>
 EXHIBIT
  NO.                                  DESCRIPTION OF EXHIBIT
  ---                                  ----------------------
<S>            <C>                                                

  *2.1         -- Asset Purchase Agreement dated as of January 25, 1996 among the Registrant, Moisture
                  Systems Corporation and certain Affiliates of Moisture Systems
                  Corporation 
  *2.2         -- Share  Purchase  Agreement  dated as of January  25, 1996
                  among the Registrant, Rutter
                  Holding B.V. and certain Affiliates of Rutter Holding B.V.
  *3.1         -- Articles of Organization of the Registrant, as amended
  *3.2         -- Bylaws of the Registrant
  *4.1         -- Specimen Common Stock Certificate
   5           -- Opinion of Seth H. Hoogasian, Esq.
 *10.1         -- Corporate Services Agreement dated as of March 20, 1996, between Thermo Electron
                  Corporation ("Thermo Electron") and the Company
  10.2         -- Thermo Electron Corporate Charter, as amended and restated effective January 3,
                  1993 (filed as Exhibit 10.1 to Thermo Electron Corporation's Annual Report on
                  Form 10-K for the fiscal year ended January 2, 1993 [File No. 1-8002] and incorporated
                  herein by reference)
 *10.3         -- Tax Allocation Agreement dated as of March 20, 1996 between Thermedics Inc.
                  ("Thermedics") and the Company
 *10.4         -- Master Repurchase Agreement dated as of March 20, 1996 between the Company and
                  Thermo Electron
 *10.5         -- Master Guarantee Reimbursement dated as of March 20, 1996 among Thermo Electron,
                  Thermedics and the Company
 *10.6         -- Master Guarantee Reimbursement dated as of March 20, 1996 between Thermedics and
                  the Company
 *10.7         -- Equity Incentive Plan of the Company
 *10.8         -- Deferred Compensation Plan for Directors of the Company
 *10.9         -- $21.2 Million Principal Amount Promissory Note due March 1998, issued by the Company
                  to Thermedics
 *10.10        -- Form of Indemnification Agreement for Officers and Directors
 *10.11        -- Stock Purchase Agreement dated as of March 25, 1996 between David H. Fine and
                  the Company
 *10.12        -- Stock Purchase Agreement dated as of November 19, 1996 between Jeffrey J. Langan
                  and the Company
  10.13        -- Stock Holding Assistance Plan and Form of Promissory Note
                  In  addition  to the  stock-based  compensation  plans  of the
                  Company,  the executive officers of the Company may be granted
                  awards   under   stock-based   compensation   plans   of   the
                  Registrant's  parent,  Thermo Electron,  and its subsidiaries,
                  for  services  rendered to the  Company or to such  affiliated
                  corporations.  Such plans were filed as Exhibits 10.21 through
                  10.45 to the Annual Report on Form 10-K of Thermo Electron for
                  the year ended  December  28,  1996 [File No.  1-8002]  and as
                  Exhibits 10.18 through 10.22 to the Annual Report on Form 10-K
                  of  Thermedics  for the fiscal  year ended  December  28, 1996
                  [File No. 1-9567] and are incorporated herein by reference.
   11          -- Computation of Earnings (Loss) per Share
  *22          -- Subsidiaries of the Company
   23.1        -- Consent of Arthur Andersen LLP
   23.2        -- Consent of Arthur Andersen LLP
   23.3        -- Consent of Deloitte & Touche Registeraccountants
   23.4        -- Consent of Seth H. Hoogasian, Esq. (contained in Exhibit 5)
   24          -- Power of Attorney (contained on page II-3 of this Registration Statement)

</TABLE>

                                                                       EXHIBIT 5
                           Thermedics Detection Inc.
                                81 Wyman Street
                       Waltham, Massachusetts 02254-9046

                                 July 23, 1997



Thermedics Detection Inc.
220 Mill Road
Chelmsford, Massachusetts 01824

            Re: Registration Statement on Form S-1 Relating to 643,500 Shares of
                the Common Stock, $.10 par value, of Thermedics Detection Inc.

Dear Sirs

     I  am  General  Counsel  to  Thermedics  Detection  Inc.,  a  Massachusetts
corporation  (the  "Company"),  and have acted as counsel in connection with the
registration  under the  Securities  Act of 1933,  as amended,  on Form S-1 (the
"Registration Statement"), of 643,500 shares of the Company's Common Stock, $.10
par  value  per  share  (the  "Shares"),  which may from time to time be sold by
certain shareholders of the Company.

     I or a member of my staff have reviewed the corporate  proceedings taken by
the Company with respect to the  authorization  of the issuance of the Shares. I
or a member of my staff have also examined and relied upon  originals or copies,
certified  or  otherwise  authenticated  to my  satisfaction,  of all  corporate
records,  documents,  agreements or other  instruments of the Company,  and have
made investigations of law and have discussed with the Company's representatives
questions  of fact  that I or a member  of my staff  have  deemed  necessary  or
appropriate.

     Based  upon and  subject to the  foregoing,  I am of the  opinion  that the
Shares have been duly  authorized by the Company and are validly  issued,  fully
paid and non-assessable.

     I  hereby  consent  to the  filing  of this  opinion  as  Exhibit  5 to the
Registration  Statement,  including any amendments thereto, and to the use of my
name under the  caption "Legal  Opinion" in the  prospectus constituting  a part
thereof.



                                       Sincerely,         
                                       
                                       
                                       
                                       
                                       Seth H. Hoogasian
                                       General Counsel




                                                                   Exhibit 10.13

                           THERMEDICS DETECTION INC.
                           -------------------------

                         STOCK HOLDING ASSISTANCE PLAN
                         -----------------------------

SECTION 1.   Purpose.

         The purpose of this Plan is to benefit  Thermedics  Detection Inc. (the
"Company")  and its  stockholders  by  encouraging  Key Employees to acquire and
maintain  share  ownership  in  the  Company,   by  increasing  such  employees'
proprietary  interest in promoting the growth and performance of the Company and
its  subsidiaries and by providing for the  implementation  of the Stock Holding
Policy.

SECTION 2.        Definitions.

         The following terms, when used in the Plan, shall have the meanings set
forth below:

         Committee:  The Human Resources  Committee of the Board of Directors of
the Company as appointed from time to time.

         Common  Stock:  The  common  stock  of the  Company  and any  successor
thereto.

         Company: Thermedics Detection Inc., a Delaware corporation.

         Stock  Holding  Policy:  The Stock  Holding  Policy of the Company,  as
adopted by the Committee and as in effect from time to time.

         Key Employee:  Any employee of the Company or any of its  subsidiaries,
including  any  officer  or  member  of the  Board of  Directors  who is also an
employee,  as  designated  by the  Committee,  and who,  in the  judgment of the
Committee,  will be in a position to contribute  significantly to the attainment
of the Company's strategic goals and long-term growth and prosperity.

         Loans:  Loans extended to Key Employees by the Company pursuant to this
Plan.

         Plan:  The Thermo  Fibertek  Inc.  Stock  Holding  Assistance  Plan, as
amended from time to time.

SECTION 3.        Administration.

         The Plan and the Stock  Holding  Policy  shall be  administered  by the
Committee,  which  shall  have  authority  to  interpret  the Plan and the Stock
Holding Policy and, subject to their provisions, to prescribe, amend and rescind
any rules and  regulations  and to make all other  determinations  necessary  or
desirable for the administration  thereof.  The Committee's  interpretations and
decisions  with regard to the Plan and the Stock  Holding  Policy and such rules









and regulations as may be established  thereunder shall be final and conclusive.
The  Committee  may correct any defect or supply any omission or  reconcile  any
inconsistency  in the Plan or the Stock  Holding  Policy,  or in any Loan in the
manner and to the extent the Committee  deems desirable to carry it into effect.
No member  of the  Committee  shall be liable  for any  action  or  omission  in
connection with the Plan or the Stock Holding Policy that is made in good faith.

SECTION 4.        Loans and Loan Limits.

         The Committee has  determined  that the provision of Loans from time to
time to Key  Employees in such amounts as to cause such Key  Employees to comply
with the Stock Holding Policy is, in the judgment of the  Committee,  reasonably
expected to benefit the Company and  authorizes the Company to extend Loans from
time to time to Key  Employees  in such  amounts as may be requested by such Key
Employees in order to comply with the Stock  Holding  Policy.  Such Loans may be
used  solely for the  purpose of  acquiring  Common  Stock  (other than upon the
exercise of stock options or under employee stock purchase plans) in open market
transactions or from the Company.

         Each  Loan  shall be full  recourse  and  evidenced  by a  non-interest
bearing  promissory note  substantially in the form attached hereto as Exhibit A
(the "Note") and maturing in accordance with the provisions of Section 6 hereof,
and containing such other terms and conditions,  which are not inconsistent with
the provisions of the Plan and the Stock Holding Policy,  as the Committee shall
determine in its sole and absolute discretion.

SECTION 5.        Federal Income Tax Treatment of Loans.

         For federal income tax purposes,  interest on Loans shall be imputed on
any interest free Loan extended  under the Plan. A Key Employee  shall be deemed
to have paid the imputed interest to the Company and the Company shall be deemed
to have  paid said  imputed  interest  back to the Key  Employee  as  additional
compensation.  The deemed  interest  payment  shall be taxable to the Company as
income,  and may be deductible to the Key Employee to the extent allowable under
the rules relating to investment  interest.  The deemed compensation  payment to
the Key Employee shall be taxable to the employee and deductible to the Company,
but shall also be subject to employment taxes such as FICA and FUTA.

SECTION 6.        Maturity of Loans.

         Each  Loan to a Key  Employee  hereunder  shall be due and  payable  on
demand by the  Company.  If no such demand is made,  then each Loan shall mature
and the principal  thereof shall become due and payable on the fifth anniversary
of the date of the  Loan,  provided  that  the  Committee  may,  in its sole and
absolute discretion, authorize such other maturity and repayment schedule as the
Committee may determine. Each Loan shall also become immediately due and payable
in full,  without demand,  upon the occurrence of any of the events set forth in
the Note; provided that the Committee may, in its sole and absolute  discretion,
authorize an  extension of the time for  repayment of a Loan upon such terms and
conditions as the Committee may determine.



                                       2





SECTION 7.        Amendment and Termination of the Plan.

         The  Committee  may from  time to time  alter or amend  the Plan or the
Stock Holding Policy in any respect,  or terminate the Plan or the Stock Holding
Policy at any time. No such amendment or  termination,  however,  shall alter or
otherwise  affect the terms and  conditions of any Loan then  outstanding to Key
Employee  without  such Key  Employee's  written  consent,  except as  otherwise
provided herein or in the promissory note evidencing such Loan.

SECTION 8.        Miscellaneous Provisions.

         (a) No  employee  or other  person  shall  have  any  claim or right to
receive a Loan  under  the  Plan,  and no  employee  shall  have any right to be
retained  in the employ of the Company  due to his or her  participation  in the
Plan.

         (b) No Loan shall be made  hereunder  unless  counsel  for the  Company
shall be satisfied that such Loan will be in compliance with applicable federal,
state and local laws.

         (c) The expenses of the Plan shall be borne by the Company.

         (d) The Plan shall be unfunded,  and the Company  shall not be required
to establish  any special or separate fund or to make any other  segregation  of
assets to assure the making of any Loan under the Plan.

         (e) Except as otherwise  provided in Section 7 hereof, by accepting any
Loan under the Plan,  each Key  Employee  shall be  conclusively  deemed to have
indicated his acceptance and  ratification  of, and consent to, any action taken
under  the  Plan or the  Stock  Holding  Policy  by the  Company,  the  Board of
Directors of the Company or the Committee.

         (f) The appropriate officers of the Company shall cause to be filed any
reports,  returns or other  information  regarding  Loans  hereunder,  as may be
required by any applicable statute, rule or regulation.

SECTION 9.        Effective Date.

         The Plan and the Stock  Holding  Policy  shall  become  effective  upon
approval and adoption by the Committee.



                                       3





                                      EXHIBIT A TO STOCK HOLDING ASSISTANCE PLAN


                           THERMEDICS DETECTION INC.

                                PROMISSORY NOTE



$                                                            Dated:
 --------------                                                    -------------


         For value received, ________________,  an individual whose residence is
located at _______________________  (the "Employee"),  hereby promises to pay to
Thermedics  Detection Inc. (the "Company"),  or assigns,  ON DEMAND,  but in any
case on or  before  [insert  date  which  is the  fifth  anniversary  of date of
issuance]  (the  "Maturity  Date"),  the principal sum of [loan amount in words]
($_______),  or such part  thereof as then  remains  unpaid,  without  interest.
Principal  shall be payable in lawful money of the United States of America,  in
immediately  available  funds, at the principal office of the Company or at such
other  place as the Company  may  designate  from time to time in writing to the
Employee.

          Unless the Company  has  already  made a demand for payment in full of
this Note, the Employee agrees to repay an amount equal to 20% of the Employee's
annual  cash  incentive  compensation  (referred  to as bonus)  to the  Company,
beginning  with the first  such bonus  payment  to occur  after the date of this
Note,  and on each of the next four bonus payment dates  occurring  prior to the
Maturity  Date.  Any amount  remaining  unpaid under this Note, if no demand has
been made by the Company, shall be due and payable on the Maturity Date.

         This Note may be prepaid at any time or from time to time,  in whole or
in part,  without any premium or penalty.  The Employee  acknowledges and agrees
that the Company has advanced to the Employee the principal  amount of this Note
pursuant to the Company's Stock Holding  Assistance Plan, and that all terms and
conditions of such Plan are incorporated herein by reference.

         The  unpaid   principal  amount  of  this  Note  shall  be  and  become
immediately  due and  payable  without  notice or  demand,  at the option of the
Company, upon the occurrence of any of the following events:

                  (a) the  termination  of the  Employee's  employment  with the
         Company, with or without cause, for any reason or for no reason;

                  (b) the death or disability of the Employee;

                  (c) the  failure  of the  Employee  to pay his or her debts as
         they become  due,  the  insolvency  of the  Employee,  the filing by or
         against the Employee of any petition under



                                       4




         the  United  States  Bankruptcy  Code  (or the  filing  of any  similar
         petition under the insolvency law of any  jurisdiction),  or the making
         by the Employee of an assignment  or trust  mortgage for the benefit of
         creditors or the appointment of a receiver,  custodian or similar agent
         with respect to, or the taking by any such person of possession of, any
         property of the Employee; or

                  (d) the issuance of any writ of attachment, by trustee process
         or  otherwise,  or any  restraining  order or  injunction  not removed,
         repealed or dismissed  within thirty (30) days of issuance,  against or
         affecting  the person or property of the  Employee or any  liability or
         obligation of the Employee to the Company.

         In case any payment herein provided for shall not be paid when due, the
Employee  further  promises  to pay  all  costs  of  collection,  including  all
reasonable attorneys' fees.

         No delay or omission on the part of the Company in exercising any right
hereunder  shall  operate as a waiver of such right or of any other right of the
Company, nor shall any delay, omission or waiver on any one occasion be deemed a
bar to or waiver  of the same or any other  right on any  future  occasion.  The
Employee hereby waives presentment,  demand,  notice of prepayment,  protest and
all other  demands  and notices in  connection  with the  delivery,  acceptance,
performance, default or enforcement of this Note. The undersigned hereby assents
to any  indulgence  and any  extension  of time for payment of any  indebtedness
evidenced hereby granted or permitted by the Company.

         This  Note  has been  made  pursuant  to the  Company's  Stock  Holding
Assistance Plan and shall be governed by and construed in accordance  with, such
Plan and the laws of the State of Delaware and shall have the effect of a sealed
instrument.


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

                                              Employee Name:
                                                            -----------------


- ------------------------
Witness



                                       5





                                                                      EXHIBIT 11

                            THERMEDICS DETECTION INC.
                    COMPUTATION OF EARNINGS (LOSS) PER SHARE


<TABLE>
<CAPTION>
                                                                   YEAR ENDED                      THREE MONTHS ENDED
                                                   -----------------------------------------     -----------------------
                                                   DECEMBER 31,   DECEMBER 30,   DECEMBER 28,    MARCH 30,     MARCH 29,
                                                       1994           1995           1996          1996           1997
                                                       ----           ----           ----          ----           ----
<S>                                                <C>            <C>            <C>            <C>           <C>
COMPUTATION OF PRIMARY EARNINGS
  (LOSS) PER SHARE:
Net Income (Loss) (a)                              $ 6,380,000    $ 1,508,000    $   362,000    $  (524,000)  $ 1,024,000 
                                                   -----------    -----------    -----------    -----------   -----------
Shares:
   Weighted average shares outstanding              10,000,000     10,000,000     10,275,385     10,032,967    10,975,926
   Add: Shares issuable from assumed exercise of
        options and shares issued in private
        placements (as determined by the
        application of the treasury stock method)       68,834         68,834         44,888         65,889            --
                                                   -----------    -----------    -----------    -----------   -----------
   Weighted averages shares, as adjusted (b)        10,068,834     10,068,834     10,320,273     10,098,856    10,975,926
                                                   -----------    -----------    -----------    -----------   -----------
Primary Earnings (Loss) per Share (a) / (b)        $       .63    $       .15    $       .04    $      (.05)  $       .09
                                                   ===========    ===========    ===========    ===========   ===========
</TABLE>







                                                                    EXHIBIT 23.1

                 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

To THERMEDICS DETECTION INC.:

    As  independent  public  accountants,  we hereby  consent  to the use of our
reports dated February 3, 1997 (except with respect to the matters  discussed in
Note 9 as to which the date is March 26,  1997)  (and to all  references  to our
Firm)  included  in or made a part of this  Registration  Statement  and related
Prospectus of Thermedics Detection Inc.

                                         ARTHUR ANDERSEN LLP

Boston, Massachusetts
July 23, 1997







                                                                    EXHIBIT 23.2

                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

To MOISTURE SYSTEMS CORPORATION AND MOISTURE SYSTEMS LIMITED:

    As  independent  public  accountants,  we hereby  consent  to the use of our
report dated February 3, 1997 (and to all references to our Firm) included in or
made a part of this Registration  Statement and related Prospectus of Thermedics
Detection Inc.

                                         ARTHUR ANDERSEN LLP

Boston, Massachusetts
July 23, 1997







                                                                    EXHIBIT 23.3

                       INDEPENDENT AUDITORS' CONSENT

    We consent to the use in this Registration Statement of Thermedics Detection
Inc.  on  Form  S-1 of our  report  dated  January  29,  1997  (relating  to the
consolidated  financial  statements  of Rutter & Co.  B.V.  for the period  from
January  25,  1996 to  December  28,  1996,  not  presented  separately  herein)
appearing  on page F-3 in the  Prospectus,  which  is part of this  Registration
Statement.

    We also  consent to the use in this  Registration  Statement  of  Thermedics
Detection  Inc. on Form S-1 of our report  dated March 13, 1996  (except for the
disclosures included in the supplementary  information under the caption "United
States Generally  Accepted  Accounting  Principles  (U.S.  GAAP)" which is as of
December 20, 1996) relating to the consolidated financial statements of Rutter &
Co. B.V.  for the two years ended  December  31, 1995  appearing on page F-28 in
this Prospectus, which is part of this Registration Statement.

    We also consent to the  reference to us under the heading  "Experts" in such
Prospectus.






DELOITTE & TOUCHE Registeraccountants

Almelo, The Netherlands
July 23, 1997










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