BARRINGER TECHNOLOGIES INC
S-3, 1998-05-28
TESTING LABORATORIES
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Registration No. 333

================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM S-3
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933
                                 ---------------

                           BARRINGER TECHNOLOGIES INC.
             (Exact name of registrant as specified in its charter)

                Delaware                                  84-0720473           
        (State or other jurisdiction of                (I.R.S. Employer
        incorporation or organization)                Identification No.)

                                219 South Street
                          Murray Hill, New Jersey 07974
                                 (908) 665-8200
          (Address, including zip code, and telephone number, including
             area code, of registrant's principal executive offices)

                                Stanley S. Binder
                           Barringer Technologies Inc.
                 219 South Street, Murray Hill, New Jersey 07974
                                 (908) 665-8200
                      (Name, address and telephone number,
                   including area code, of agent for service)

                                   Copies to:
                             John D. Hogoboom, Esq.
                              Lowenstein Sandler PC
                              65 Livingston Avenue
                           Roseland, New Jersey 07068
                                 (973) 597-2500

     Approximate date of commencement of proposed sale to the public:  From time
to  time  after  the  effective  date  of  this  Registration  Statement  and as
determined by the Selling Securityholders and the holders of the Warrants.
     If the only  securities  being  registered  on this Form are being  offered
pursuant to dividend or interest  reinvestment plans, please check the following
box. |_|
     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, other than securities offered only in connection with dividend or interest
reinvestment plans, please 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, please check the following box
and list  the  Securities  Act  registration  statement  number  of the  earlier
effective registration statement for the same offering. |_|
     If this Form is a  post-effective  amendment  filed pursuant to Rule 462(c)
under the Securities Act, please 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
under the Securities Act, please check the following box. |_|
<TABLE>
<CAPTION>

                                         CALCULATION OF REGISTRATION FEE
<S>                              <C>                     <C>                    <C>                       <C>    
- ----------------------------- ----------------------- ------------------------- ------------------------- -------------------
   Title of Each Class of                                  Proposed Maximum
Securities to be Registered         Amount to be          Aggregate Offering        Proposed Maximum          Amount of
                                     Registered             Price Per Unit      Aggregate Offering Price   Registration Fee
- ----------------------------- ----------------------- ------------------------- ------------------------- -------------------
Common Stock
  ($0.01 per share)                   125,000(1)               $10.35(2)                 $1,293,750                $382
- ----------------------------- ----------------------- ------------------------- ------------------------- -------------------
Common   Stock    Underlying
Common    Stock     Purchase
Warrants                               31,250                 $10.35(3)                  $  323,438                $ 96
- ----------------------------- ----------------------- ------------------------- ------------------------- -------------------
Common    Stock     Purchase
Warrants                              125,000                 $10.35(3)                  $1,293,750                 -- (4)
- ----------------------------- ----------------------- ------------------------- ------------------------- -------------------
</TABLE>

(1)   Pursuant to Rule 416,  there are also being  registered  an  indeterminate
      number of shares of the  Registrant's  common  stock,  par value $0.01 per
      share, which may become issuable pursuant to the anti-dilution  provisions
      of the Warrants.
(2)   Estimated  solely for the  purpose of  calculating  the  registration  fee
      pursuant to Rule 457(c) based upon a price of $10.35 per share,  which was
      the  average  of the high and low sale  prices as  reported  on the Nasdaq
      National Market on May 22, 1998.
(3)   Calculated pursuant to Rule 457(g)(3).
(4)   Pursuant to Rule 457(g) under the Securities  Act of 1933, as amended,  no
      separate  registration  fee is  required  to be paid with  respect  to the
      Warrants registered hereby.

       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 the  Registration  Statement  shall become
effective on such date as the Commission,  acting pursuant to said Section 8(a),
may determine.

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


<PAGE>
                                     LEGEND

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 MAY 28, 1998


PROSPECTUS
                         156,250 Shares of Common Stock

                     125,000 Common Stock Purchase Warrants

                           BARRINGER TECHNOLOGIES INC.

         This   Prospectus   relates  to  the   offering  by  certain   existing
securityholders of the Company named herein (the "Selling  Securityholders")  of
the  following  securities,  which may be sold from time to time by the  Selling
Securityholders pursuant to this Prospectus: (i) 125,000 shares of common stock,
par value $0.01 per share ("Common Stock"), of Barringer  Technologies Inc. (the
"Company") and 125,000 Common Stock  Purchase  Warrants (the  "Warrants") of the
Company  issuable upon the exercise of a warrant (the  "Underwriter's  Warrant")
sold by the Company in connection with its public offering in November 1996, and
(ii) 31,250  shares of Common  Stock  issuable  upon the exercise of the 125,000
Warrants.  The Common  Stock and the  Warrants  offered  hereby are  referred to
herein as the "Securities".

         The Underwriter's Warrant is exercisable (x) with respect to the Common
Stock for a period of four years  commencing on November 12, 1997 at an exercise
price of $10.276 per share, and (y) with respect to the Warrants for a period of
two years  commencing  on November  12,  1997 at an exercise  price of $0.06 per
Warrant.  The Warrants are  exercisable  until November 12, 1999 and entitle the
holder  thereof to purchase  one-quarter of one share of Common Stock at a price
of $9.847 per share. The exercise prices of and the number of shares issuable in
connection  with  the  exercise  of the  Underwriter's  Warrant,  including  the
exercise  of the  Warrants  covered  thereby,  are subject to  adjustment  under
certain circumstances.  The Warrants are redeemable by the Company for $0.25 per
warrant (subject to adjustment under certain circumstances),  upon not less than
30 days' prior  written  notice,  if the  closing bid price of the Common  Stock
averages in excess of 200% of the exercise price of the Warrants for a period of
30 days ending within 15 days of the redemption  notice date. The  Underwriter's
Warrant is not subject to redemption by the Company.

         If  the  Underwriter's  Warrant and all Warrants  covered  thereby  are
exercised in full,  the Company would  receive  proceeds of  approximately  $1.6
million (prior to the deduction of fees and expenses  payable in connection with
the sale of the  Securities  offered  hereby (the  "Offering")).  Other than the
proceeds received by the Company from the exercise of the Underwriter's  Warrant
and the exercise of the Warrants covered  thereby,  the Company will not receive
any of the proceeds from the sale of the Securities  offered hereby. The Company
estimates   that  its  expenses  in   connection   with  the  Offering  will  be
approximately $15,000.

         The Selling  Securityholders may, from time to time, offer and sell the
Common Stock being offered hereby in the over-the-counter  market, in negotiated
transactions,  or  otherwise,  at  prices  then  prevailing  or  related  to the
then-current  market price or at  negotiated  prices.  The Common Stock  offered
hereby may be sold  directly by a Selling  Securityholder  or through  agents or
broker-dealers  acting as  principal  or agent,  or in block trades or by one or
more underwriters. See "Plan of Distribution."

         The Common Stock and the  Warrants are included in the Nasdaq  National
Market under the symbols "BARR" and "BARRW",  respectively. On May 22, 1998, the
last sale price of the Common  Stock as reported on the Nasdaq  National  Market
was $10 5/8 per share,  and the last sale price of the  Warrants  as reported on
the Nasdaq National Market System was $7/8 per Warrant.

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

         See "Risk  Factors"  on page 4  for  certain  factors  which  should be
considered by prospective purchasers of the Securities offered hereby.

  THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
       EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
            COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON
                  THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS.
                       ANY REPRESENTATION TO THE CONTRARY
                             IS A CRIMINAL OFFENSE.
   _________________________________________________________________________

                The date of this Prospectus is ___________, 1998.




                                                       
                              AVAILABLE INFORMATION

         The  Company  is  subject  to  the  information   requirements  of  the
Securities  Exchange  Act of 1934,  as amended  (the  "Exchange  Act"),  and, in
accordance therewith, files reports, proxy statements and other information with
the Securities and Exchange Commission (the "Commission").  Such reports,  proxy
statements  and  information  filed by the Company  with the  Commission  can be
inspected  and  copied at the  public  reference  facilities  maintained  by the
Commission at Room 1024, 450 Fifth Street,  NW,  Washington,  D.C. 20549; and at
the  Commission's  Regional  Offices at 500 West Madison,  Suite 1400,  Chicago,
Illinois  60661 and at Seven World Trade Center,  Suite 1300, New York, New York
10048. Copies of such material can be obtained from the Public Reference Section
of the Commission at its principal  office at Room 1024,  450 Fifth Street,  NW,
Washington, D.C. 20549, at prescribed rates. The Commission maintains a Web site
that contains  reports,  proxy and information  statements and other information
regarding  issuers,  such as the  Company,  that  file  electronically  with the
Commission  and the address of such Web site is  http://www.sec.gov.  The Common
Stock and the  Warrants  are  included in the Nasdaq  National  Market under the
symbols BARR and BARRW,  respectively,  and reports,  proxy statements and other
information  regarding the Company may be inspected and copied at the offices of
the Nasdaq Stock Market, 1735 K Street, N.W., Washington, D.C. 20006.

     The Company has filed with the Commission a Registration  Statement on Form
S-3  (together  with  all  respective   amendments  thereto,  the  "Registration
Statement")  under the  Securities  Act of 1933,  as   amended (the  "Securities
Act"), with respect to the Securities  offered hereby.  This Prospectus does not
contain all of the information set forth in the  Registration  Statement and the
exhibits thereto, certain portions of which have been omitted in accordance with
the rules and  regulations  of the  Commission.  For  further  information  with
respect to the Company and the Securities  offered hereby,  reference is made to
the Registration  Statement and the related exhibits.  Any statements  contained
herein  concerning the provisions of any document are not  necessarily  complete
and, in each  instance,  reference is made to the copy of such document filed as
an exhibit to the  Registration  Statement.  Each such statement is qualified in
its entirety by such  reference.  Copies of the  Registration  Statement and the
exhibits  thereto  are on  file  at the  offices  of the  Commission  and may be
obtained,  upon  payment  of the fee  prescribed  by the  Commission,  or may be
examined  without  charge at the public  reference  facilities of the Commission
described above.

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

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

                  The following documents,  which have been filed by the Company
with the  Commission  pursuant to the Exchange Act, are hereby  incorporated  by
reference in this Prospectus: 


                           (i) The  Company's  Annual  Report on Form 10-KSB for
the year ended December 31, 1997;

                           (ii) The  Company's  Quarterly  Report on Form 10-QSB
for the period ended March 31, 1998; and

                           (iii) The  description  of the Common Stock set forth
in the Company's  Registration  Statement filed on Form 8-A and any amendment or
report filed for the purpose of updating such description.

                  All documents filed by the Company  pursuant to Section 13(a),
13(c),  14 or 15(d) of the  Exchange Act after the date of this  Prospectus  and
prior to the  completion of the Offering being made hereby shall be deemed to be
incorporated  by reference in this  Prospectus  and to be a part hereof from the
date of  filing  of such  documents.  Any  statement  contained  herein  or in a
document  incorporated or deemed to be incorporated by reference herein shall be
deemed to be modified or  superseded  for  purposes  of this  Prospectus  to the
extent  that a statement  contained  herein or in any other  subsequently  filed
document  which  also is or is deemed to be  incorporated  by  reference  herein
modifies or supersedes such  statement.  Any statement so modified or superseded
shall not be deemed,  except as so modified or superseded,  to constitute a part
of this Prospectus.

                  The Company  hereby  undertakes to provide  without  charge to
each person,  including any beneficial  owner, to whom a copy of this Prospectus
has been delivered,  upon the written or oral request of any such person, a copy
of any or all of the documents referred to above under "Incorporation of Certain
Documents by Reference"  (other than the exhibits to such documents  unless such
exhibits are specifically incorporated by reference in such documents). Requests
for such copies should be directed to:  Barringer  Technologies  Inc., 219 South
Street, Murray Hill, New Jersey 07974, Attention: Secretary (telephone no. (908)
665-8200).

                           FORWARD-LOOKING STATEMENTS

                  This   Prospectus   contains  or   incorporates  by  reference
forward-looking  statements  within the meaning of Section 27A of the Securities
Act and  Section  21E of the  Exchange  Act that are based on the beliefs of the
Company's  management as well as assumptions  made by and information  currently
available to the Company's management.  When used in this Prospectus,  the words
"estimate,"  "project,"  "believe,"  "anticipate,"  intend,"  "expect,"  "plan,"
"predict," "may," "should," "will," the negative thereof and similar expressions
are intended to identify forward-looking statements. Such statements reflect the
current  views of the Company with  respect to future  events based on currently
available  information  and are  subject to risks and  uncertainties  that could
cause  actual  results  to differ  materially  from those  contemplated  in such
forward-looking  statements.  Factors that could cause actual  results to differ
materially  from the  Company's  expectations  are set forth  below  under "Risk
Factors," including,  but not limited to, "Dependence on Government  Procurement
Policies," "Dependence on Large Orders; Customer Concentrations," "Dependence on
IONSCAN(R)  and Market  Acceptance,"  "Dependence  on New  Product  Development;
Technological  Advancement," "Limited Proprietary Technology,"  "Fluctuations in
Operating  Results,"   "Competition,"   "Lengthy  Sales  Cycle,"  "International
Business;  Risk of Change  in  Foreign  Regulations;  Fluctuations  in  Exchange
Rates,"  "Dependence on Limited  Number of Suppliers,"  "Ability to Manage Rapid
Growth" and "Risks  Associated with Acquisition  Strategy." Other factors may be
described from time to time by the Company's  public filings with the Securities
and  Exchange  Commission,   news  releases  and  other  communications.   These
forward-looking  statements  speak only as of the date hereof.  The Company does
not  undertake  any  obligation  to  release  publicly  any  revisions  to these
forward-looking  statements to reflect  events or  circumstances  after the date
hereof or to reflect the occurrence of unanticipated events.



                                                       
                                  RISK FACTORS

                  The  Securities offered  hereby involve a high degree of risk.
In addition to the other  information  contained or incorporated by reference in
this  Prospectus,  the following risk factors should be considered  carefully in
evaluating the Company, its business and an investment in the Securities offered
hereby.

Dependence on Government Procurement Policies

The Company's  business is dependent upon purchases of IONSCAN(R)s by government
agencies.  Budgetary allocations for detection equipment are dependent, in part,
upon  government  policies  that  fluctuate  from  time to time in  response  to
political and other factors,  including the public's perception of the threat of
airline   bombings  and  other  terrorist  acts.  The  Company  expects  that  a
substantial  portion of current and anticipated  purchases of advanced detection
equipment  will  continue to be made by government  agencies  with  appropriated
funds.  For instance,  sales to the FAA constituted  approximately  14.8% of the
Company's revenues for the fiscal year ended December 31, 1997.

A  reduction  of  funding  for  security  efforts  or  drug  interdiction  could
materially and adversely affect the Company's business,  financial condition and
results of  operations.  There can be no assurance that funding for the purchase
of such  equipment  will be  continued  or as to the  level of such  funding.  A
substantial  amount of the  funds  appropriated  to date  have been and  amounts
appropriated  in the  future  will  continue  to be used to  purchase  equipment
utilizing other technologies,  such as enhanced x-ray, computer aided tomography
("CATSCAN") and other bulk imaging  technologies.  Accordingly,  there can be no
assurance  as to the amount  that will  ultimately  be spent on the  purchase of
trace particle detection  equipment or as to the number of IONSCAN(R)s that will
actually be purchased. In addition, there can be no assurance that the Company's
products will meet any  certification or other  requirements that may be adopted
by any government agencies.

Dependence on Large Orders; Customer Concentrations

In any given fiscal year, the Company's revenues have principally consisted, and
the Company  believes  will  continue to consist,  of large  orders for multiple
IONSCAN(R)s from a limited number of customers. While the number and identity of
the  Company's  customers  may vary  from  period  to  period,  the  Company  is
nevertheless  dependent upon these multiple orders for a substantial  portion of
its  revenues.  There can be no  assurance  that the  Company  will  obtain such
multiple orders on a consistent basis.  During the year ended December 31, 1997,
approximately  $8.3 million,  or 36.7%, of the Company's revenues were generated
from  sales to the  Company's  three  largest  customers.  During the year ended
December 31, 1996,  revenues from the Company's  three  largest  customers  were
approximately $2.8 million, or 25.5%, of the Company's  revenues.  A significant
portion of the Company's anticipated future revenues are expected to result from
orders from the FAA.  The  Company's  inability  to obtain  sufficient  multiple
orders or to expand its customer  base could have a material  adverse  effect on
the Company's business, financial condition and results of operations.

Dependence on IONSCAN(R) and Market Acceptance

The  Company  derives  substantially  all of  its  revenues  from  the  sale  of
IONSCAN(R)s.  There can be no assurance  that markets for the  IONSCAN(R) or the
Company's  other current or future  products will develop as the Company expects
or that the  Company  will be able to  capitalize  on such  market  development.
Similarly,  there can be no  assurance  that any markets that do develop will be
sustained.

Dependence on New Product Development; Technological Advancement

The Company's  success is dependent  upon its ability to continue to enhance the
IONSCAN(R)  and to  develop  or  acquire  new  products  and  technologies  that
incorporate  technological  advances, keep pace with evolving industry standards
and  respond to  changing  customer  requirements.  If the  Company is unable to
develop  and  introduce  new  products  or  enhancements  in a timely  manner in
response to changing market conditions or customer  requirements,  the Company's
business,  financial condition and results of operations would be materially and
adversely affected.

In  addition,  from  time  to time  the  Company  or its  present  or  potential
competitors may introduce new products,  capabilities or technologies  that have
the  potential  to replace,  shorten the life spans of, or render  obsolete  the
Company's existing products.  There can be no assurance that the Company will be
successful in convincing  potential customers that the IONSCAN(R) is superior to
such other  systems or  products,  that new systems with  comparable  or greater
performance,  lower  prices  and  faster or  equivalent  throughput  will not be
introduced,  or that, if such products are introduced,  customers will not delay
or cancel  existing  or  future  orders  for the  IONSCAN(R).  Announcements  of
currently  planned or other new  products  may cause  customers  to delay  their
purchasing decisions in anticipation of such products,  as occurred in late 1994
when the Company  introduced the Model 400 IONSCAN(R).  Such delays could have a
material  adverse  effect on the  Company's  business,  financial  condition and
results of operations.

Limited Proprietary Technology

Certain of the technology used in the IONSCAN(R) is licensed by the Company from
the Canadian  government  pursuant to a license  agreement that expires in March
1999,  subject to the Company's right to extend on a year-to-year  basis through
March 2009.  While the Company  holds  patents  relating to certain  components,
systems and  techniques  used in the IONSCAN(R) and while certain other elements
of the  IONSCAN(R)  are protected by other  intellectual  property  rights,  the
Company has no comprehensive patent or similar exclusive  intellectual  property
right  covering the  IONSCAN(R)  in its  entirety.  In  addition,  the basic IMS
technology used by the Company is not proprietary and is available in the public
domain.  Accordingly,  present and  potential  competitors  could use such basic
technology to duplicate the performance of the IONSCAN(R).

Fluctuations in Operating Results

The Company's past operating results have been, and its future operating results
will be, subject to fluctuations resulting from a number of factors,  including:
the timing and size of orders from, and shipments to, major customers; budgeting
and purchasing  cycles of its customers;  delays in product  shipments caused by
customer  requirements  or the inability of customers to accept  shipments;  the
timing  of  enhancements  to the  IONSCAN(R)  by  the  Company  or new  products
introduced by the Company or its competitors; changes in pricing policies by the
Company,  its competitors or suppliers,  including possible decreases in average
selling  prices of the  IONSCAN(R)  in response to  competitive  pressures;  the
proportion of revenues derived from  competitive bid processes;  the mix between
sales to domestic and  international  customers;  market  acceptance of enhanced
versions of the IONSCAN(R);  the  availability  and cost of key components;  the
availability of  manufacturing  capacity;  and  fluctuations in general economic
conditions. The Company also may choose to reduce prices or to increase spending
in response to competition or to pursue new market opportunities,  and may incur
significant  charges or expenses in connection with  acquisitions  and strategic
relationships,  all of which may have a material adverse effect on the Company's
business,  financial condition and results of operations. The Company's revenues
in any period are  substantially  derived from sales of IONSCAN(R)s to a limited
number of customers and such revenues are recognized upon shipment. As a result,
variations  in the  number of orders or the  timing of  shipments  may cause the
Company's quarterly and annual operating results to vary substantially.

Moreover, government agencies and certain other customers expend unused budgeted
funds at the end of their respective  fiscal years,  causing the Company's sales
to be higher  during such  periods.  Because the  Company  generally  recognizes
substantially  all of the  revenue  from a sale upon  shipment,  and because the
recognition  of  revenue  from  the  sale  of  relatively  few  IONSCAN(R)s  may
substantially  impact the Company's  profitability during any period, the impact
of these budgetary considerations on the delivery date of a relatively few units
could   significantly   affect  the   Company's   quarterly   results   and  the
predictability of such quarterly results.

Competition

The  Company  competes  with other  entities,  including  Intelligent  Detection
Systems Inc., Ion Track Instruments Inc. and Thermedics Detection Inc., a number
of which have  significantly  greater  financial,  marketing and other resources
than the Company. Principal competitive factors include selectivity (the ability
of  an  instrument  to  identify  the  presence  of  a  particular   substance),
sensitivity  (the  ability  of  an  instrument  to  detect  small  amounts  of a
particular substance), false alarm rate, price, marketing, ease of use and speed
of analysis. There can be no assurance that the Company will be able to continue
to compete  successfully  with its  competitors  or be able to compete  with new
market entrants or in new markets that may develop.

The Company competes for government  expenditures with equipment  manufacturers,
such as InVision  Technologies,  Inc. and Vivid  Technologies,  Inc.,  utilizing
other types of detection  technologies,  including  enhanced x-ray,  CATSCAN and
other bulk  imaging  technologies,  as well as with  manufacturers  of other IMS
equipment and manufacturers  using other trace particle detection  technologies,
such as gas chromatography and chemiluminescence.

The  Company  also  competes  with the use of canines to locate the  presence of
explosives or drugs.

As a result of recent  government  initiatives,  the  Company  anticipates  that
additional technologies,  including improved IMS technologies, will be developed
and that new competitors  will enter the Company's  markets.  The failure of the
Company to develop improvements or otherwise successfully compete in its markets
would  have a  material  adverse  effect on the  Company's  business,  financial
condition and results of operations.

Lengthy Sales Cycle

The Company's  sales  process is often  protracted  due to the lengthy  approval
processes that typically accompany government expenditures. Typically, six to 12
months may elapse between a new customer's  initial evaluation of the IONSCAN(R)
and the placement of an order.

International Business;  Risk of Change in Foreign Regulations;  Fluctuations in
Exchange Rates

The  Company  markets  its  products  to  customers  outside  of the  U.S.  and,
accordingly,  is  exposed  to the risks of  international  business  operations,
including  unexpected changes in foreign and domestic  regulatory  requirements,
possible foreign currency controls, uncertain ability to protect and utilize its
intellectual   property  in  foreign   jurisdictions,   currency  exchange  rate
fluctuations  or  devaluations,  tariffs  or  other  barriers,  difficulties  in
staffing and managing foreign operations, difficulties in obtaining and managing
vendors  and   distributors   and   potentially   negative   tax   consequences.
International  sales are subject to certain  inherent risks including  embargoes
and other trade  barriers,  staffing  and  operating  foreign  sales and service
operations and collecting  accounts  receivable.  The Company is also subject to
risks  associated  with  regulations  relating  to the import and export of high
technology  products.  The Company  cannot predict  whether,  or to what extent,
quotas,  duties,  taxes or other charges or restrictions upon the importation or
exportation  of the Company's  products in the future will be implemented by the
U.S. or any other  country.  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.

A portion of the  Company's  revenues and expenses  are  denominated  in foreign
currencies.  Fluctuations in currency  exchange rates could adversely affect the
Company's  profitability  and  could  cause  the  Company's  products  to become
relatively more expensive to customers in a particular country, leading to fewer
sales or reduced  selling  prices in that country.  As a result,  the Company is
exposed to a certain  degree of exchange rate risk.  The Company  generally does
not hedge its foreign  exchange  exposure.  There can be no  assurance  that the
Company  will not  experience  material  losses  in the  future  as a result  of
currency  fluctuations or that any such losses will not have a material  adverse
effect on the Company's business, financial condition and results of operations.

Dependence on Limited Number of Suppliers

Certain key components used in the Company's  products have been designed by the
Company,  are  manufactured  pursuant to the  Company's  specifications  and are
currently purchased from only one or a limited number of suppliers.  The Company
currently does not have long-term agreements with these suppliers.  Moreover, in
view of the high cost of many of these components, the Company does not maintain
significant inventories of some necessary components.  Recently, the Company has
significantly  increased  its  purchases of certain  components to meet expected
demand for the IONSCAN(R).  As a result, in certain  circumstances,  the Company
has had to enter into new supply relationships in order to satisfy its increased
demand  for  components  and  may be  required  to do so in the  future.  If the
Company's  suppliers were to experience  financial,  operational,  production or
quality assurance difficulties, the supply of components to the Company would be
reduced or interrupted.  In the event that a supplier were to cease  operations,
discontinue  production  of a component or withhold  supply for any reason,  the
Company might be unable to acquire certain components from alternative  sources,
to find alternative  third-party  manufacturers or sub-assemblers,  or to obtain
sufficient  quantities  of certain  components,  which could result in delays or
interruptions in product shipments,  and could have a material adverse effect on
the Company's business, financial condition and results of operations.

Ability to Manage Rapid Growth

The  Company  has  rapidly  expanded  its  business  operations  as a result  of
increased demand for the IONSCAN(R), which has placed significant demands on the
Company's manufacturing, management and working capital resources and operating,
management and financial  control systems.  Failure to maintain needed resources
or to enhance the Company's operating,  management and financial control systems
as and when necessary,  or difficulties  encountered  during such  enhancements,
could  have a  material  adverse  effect on the  Company's  business,  financial
condition  and results of  operations.  The  Company's  future  growth also will
depend on its  ability to continue  to improve  and expand its  engineering  and
technical  resources  and to attract,  retain and  motivate key  personnel.  The
failure of the Company to increase its revenues  sufficiently  to compensate for
increased expenses resulting from current or future expansion,  or the Company's
failure to otherwise adequately manage the growth of its business,  would have a
material  adverse  effect on the  Company's  business,  financial  condition and
results of operations.  Further,  there can be no assurance that the Company can
sustain its recent rapid growth.

Risks Associated with Acquisition Strategy

An element of the Company's strategy is to seek acquisition  partners that would
complement  the  Company's  existing  product  offerings,   augment  its  market
coverage,  enhance its  technological  capabilities  or  otherwise  offer growth
opportunities.  Although the Company has no present understandings,  commitments
or agreements with respect to any material acquisition of any business, products
or technologies,  the Company may make such  acquisitions in the future.  Future
acquisitions  by the Company could result in potentially  dilutive  issuances of
equity   securities,   the  incurrence  of  debt  and  contingent   liabilities,
amortization  expenses relating to goodwill and other intangible assets, and the
incurrence of significant charges or expenses relating to any acquired business,
any of which could  materially  and  adversely  affect the  Company's  business,
financial  condition and results of  operations.  Acquisitions  entail  numerous
risks,  including  difficulties  in the  assimilation  of  acquired  businesses,
products  and  technologies,  diversion  of  management's  attention  from other
business  concerns,  risks of  entering  markets in which the  Company has no or
limited  prior  experience  and  potential  loss of key  employees  of  acquired
organizations.  The Company's  management has limited experience in assimilating
acquired  organizations.  No  assurance  can be given as to the  ability  of the
Company to integrate  successfully  any  businesses,  products,  technologies or
personnel  that might be acquired in the future,  and the failure of the Company
to do so  could  have a  material  adverse  effect  on the  Company's  business,
financial condition and results of operations.

Retention of and Dependence on Key Personnel

The  Company's  success  will  depend,  in part,  on its  ability  to retain the
services of its key personnel,  including  management and scientific  employees,
who are and will continue to be  instrumental  in the development and management
of the  Company's  business.  Although the Company has entered  into  employment
agreements  with its Chief  Executive  Officer and  certain of its other  senior
executives,  the  loss  of the  services  of one or more  of the  Company's  key
employees could have a material adverse effect on the Company.

Warranty Claims

The  Company  generally  provides a one-year  parts and labor  warranty  on each
IONSCAN(R),  although  from  time to time  the  Company  has  provided  extended
warranties.  Although  the  Company  has not  experienced  significant  warranty
claims,  there can be no  assurance  that such claims  will not  increase as the
Company's sales and product offerings increase.  Increased warranty claims could
have a material adverse effect on the Company's  business,  financial  condition
and results of operations.

Potential Product Liability Insurance Limits

The Company currently  maintains  product  liability  insurance in the amount of
$10.0 million per  occurrence.  The Company's  insurance  policy covers  certain
claims and the cost of legal fees involved in the defense of such claims,  which
are either  covered under the policy or alleged in such a manner so as to invoke
the  insurer's  duty to defend the Company.  The Company  believes  that,  as it
distributes  more products into the  marketplace  and expands its product lines,
its exposure to potential  product liability claims and litigation may increase.
There can be no assurance that the Company's  current level of insurance will be
sufficient  to protect the  business  and assets of the Company from all claims,
nor can any  assurance  be given that the Company  will be able to maintain  its
existing  coverage  or obtain  additional  coverage at  commercially  reasonable
rates.  Product  liability  losses in excess of insurance  coverage could have a
material  adverse  effect on the  Company's  business,  financial  condition and
results of operations.

Shares Eligible For Future Sale

Assuming the sale of all of the shares covered hereby (including shares issuable
upon the  exercise of the  Warrants),  8,005,185  shares of Common Stock will be
outstanding.  All of the shares  offered hereby will be freely  tradable  unless
acquired by affiliates of the Company. The remaining 7,848,935 shares are freely
tradable.  An additional  1,063,475 shares of Common Stock are issuable upon the
exercise or conversion of outstanding  stock options,  warrants and  convertible
securities outstanding as of May 15, 1998, all of which have been registered for
resale by the holders thereof and are, therefore, freely tradable. In connection
with a recent  public  offering  by the  Company,  certain of the  officers  and
directors  of the Company,  who held an  aggregate  of 709,621  shares of Common
Stock  (including  534,550  shares  issuable  upon  exercise  or  conversion  of
outstanding  options,  warrants and  convertible  securities)  as of February 1,
1998, agreed not to offer or sell, directly or indirectly, any securities of the
Company  in the  public  market  for a period  of 90 days from  March  30,  1998
(subject  to  certain   exceptions)   without  prior  written   consent  of  the
representatives of the underwriters of such offering.

The Company cannot predict the effect,  if any, that sales of additional  shares
of Common Stock or the  availability  of shares for future sale will have on the
market price of the Common Stock or the Warrants.  Sales in the public market of
substantial  amounts of Common Stock (including  shares issued upon the exercise
or conversion of outstanding options,  warrants and convertible securities),  or
the perception that such sales might occur,  could adversely  affect  prevailing
market prices for the Common Stock or the Warrants.  Such sales also may make it
more  difficult  for the Company to sell  equity  securities  or equity  related
securities in the future at a time and price that the Company deems appropriate.

Effects of Warrants

Holders of the Warrants will have the  opportunity  to profit from a rise in the
market price of the Common Stock  without  assuming the risk of ownership of the
shares of Common  Stock  issuable  upon the  exercise of such  Warrants,  with a
resulting  dilution in the interests of the Company's  stockholders by reason of
exercise thereof at a time when the exercise price is less than the market price
for the Common  Stock.  Further,  the terms on which the  Company  could  obtain
additional  capital  during the life of the Warrants may be adversely  affected.
Holders of Warrants  may be expected to exercise  their  Warrants at a time when
the Company could, in all  likelihood,  obtain any needed capital by an offering
of Common Stock on terms more favorable than those provided by such Warrants.

Possible Redemption of Warrants

The Warrants  are  redeemable  by the Company for $0.25 per Warrant  (subject to
adjustment  under  certain  circumstances),  upon not less  than 30 days'  prior
written notice,  if the closing bid price of the Common Stock averages in excess
of 200% of the  exercise  price of the  Warrants  for a period of 30 days ending
within 15 days of the redemption  notice date.  Redemption of the Warrants could
force the holders thereof to exercise earlier than they would otherwise have, to
exercise  at a time when it may be  disadvantageous  for  holders to do so or to
sell at the  then-current  market price when  holders  might  otherwise  wish to
retain their Warrants for possible appreciation.  Alternatively, the holders may
accept the redemption price when it is likely to be substantially  less than the
then-current  market  value  thereof.  Any  holders  who do not  exercise  their
Warrants  prior to  redemption  will forfeit the right to purchase the shares of
Common Stock underlying such Warrants.

Current Prospectus to Exercise Warrants

The Warrants are not exercisable  unless,  at the time of exercise,  the Company
has a current  prospectus  covering  the shares of Common  Stock  issuable  upon
exercise of such Warrants. In addition, in the event that any holder of Warrants
attempts to exercise  such  Warrants at any time after nine months from the date
of this  Prospectus,  the  Company  may be  required  to  file a  post-effective
amendment and deliver a current prospectus before the Warrants can be exercised.
Although  the  Company  has  undertaken  to use its best  efforts to  maintain a
current  prospectus  covering the Common  Stock  issuable  upon  exercise of the
Warrants,  there is no  assurance  that the  Company  will be able to do so. The
value of the Warrants may be greatly  reduced if a current  prospectus  covering
the Common Stock issuable upon exercise of the Warrants is not kept effective.

Absence of Public Market for Warrants; Potential Volatility of Stock Price

While the Warrants  trade  sporadically  on the Nasdaq  National  Market System,
there can be no assurance  that an active trading market in the Warrants will be
developed or, if developed,  be  maintained.  As a result,  purchasers  may have
difficulty  selling,  or otherwise disposing of, the Warrants offered hereby. In
addition,  prior to this Offering,  there have been significant  fluctuations in
the  trading  price of the Common  Stock.  No  assurance  can be given that such
volatility will not continue following the completion of this Offering.

Certain Charter Provisions

The Company's  Certificate of  Incorporation,  as amended (the  "Certificate  of
Incorporation"),  contains  provisions  which require the favorable  vote of the
holders of not less than 80.0% of the outstanding shares of Common Stock for the
approval of any merger,  consolidation or other combination with, or sale, lease
or exchange of all or substantially all of the assets of the Company to, another
entity  holding  more than  10.0% of the  Company's  outstanding  voting  equity
securities or any affiliate of such entity.  These  provisions  could discourage
potential  acquisition  proposals,  delay or  prevent a change in control of the
Company and limit the price that  certain  investors  might be willing to pay in
the future for shares of the Common Stock.

The Board of  Directors of the Company is empowered to issue shares of preferred
stock without  stockholder action. The existence of this "blank check" preferred
stock could render more  difficult or discourage an attempt to obtain control of
the Company by means of a tender offer,  merger,  proxy contest or otherwise and
may  adversely  affect the  prevailing  market  price of the Common  Stock.  The
Company currently has no plans to issue additional shares of preferred stock. In
addition,  Section 203 of the Delaware General Corporation Law restricts certain
persons from engaging in business combinations with the Company.


                                   THE COMPANY

                  The  Company is the  world's  leading  manufacturer  (based on
units sold) of high  sensitivity  equipment  used for detecting and  identifying
trace amounts of plastic and other  explosives  and illegal  drugs.  The Company
designs and  produces  products  that employ a  proprietary  application  of ion
mobility  spectrometry  ("IMS") technology that can detect and identify targeted
compounds in amounts smaller than  one-billionth of a gram in approximately  six
seconds.  The  Company's  objective  is to leverage  its position as the world's
leading provider of trace detection  systems in its core markets and to become a
leading supplier of other advanced technology  security  solutions.  The Company
intends to achieve this objective by further  penetrating its existing  markets,
leveraging  its  IMS  technology  for  new  applications,   pursuing   strategic
relationships   and   acquisitions   and   expanding  its  sales  and  marketing
capabilities.

                  The Company's current principal product, the IONSCAN(R),  is a
portable  desktop  system used in  explosives  detection  and drug  interdiction
applications.  As of  December  31,  1997,  the  Company had sold over 700 units
(including 335 during 1997) in 39 countries.

                  The markets for the  Company's  IONSCAN(R)  currently  include
aviation security, other transport security,  facilities protection,  forensics,
military,  corrections,  customs and law  enforcement.  The Company's  customers
include the Federal Aviation Administration,  the U.S. Air Force, the U.S. Coast
Guard, the U.S. Drug Enforcement Agency and the Federal Bureau of Investigation,
as well as customs agencies in France,  Canada,  Australia and Japan and various
prison facilities in the U.S. and elsewhere. The IONSCAN(R) is also installed at
over 40 airports and transportation  centers in countries  throughout the world,
including  Gatwick Airport and Heathrow  Airport in the United Kingdom,  John F.
Kennedy  International  Airport and Chicago O'Hare International  Airport in the
United States and Kuala Lumpur Airport in Malaysia,  as well as the  Eurotunnel.
The Company believes that its principal competitive advantages are the detection
capability,  reliability,  versatility,  cost  effectiveness,  ease  of use  and
portability of the IONSCAN(R). These advantages enable the IONSCAN(R) to be used
both in lieu of and in  conjunction  with  bulk  imaging  technologies,  such as
enhanced x-ray and computer aided tomography.

                  The  Company  believes  that many of the markets it serves are
experiencing  substantial  growth,  principally in reaction to heightened safety
concerns  caused by the threat of  terrorism  and growing  public  awareness  of
drug-related  criminal  activity.  The Company  believes that the  deployment of
advanced detection equipment, such as the IONSCAN(R),  will continue to increase
as the acceptance of using such equipment to combat these concerns increases. In
January 1998, the Company  received a $5.4 million order from the FAA as part of
the FAA's  publicly  announced  intention to further deploy  advanced  detection
technology  at the  nation's  larger  airports.  In addition,  during 1997,  the
Company sold a number of  IONSCAN(R)s  to the U.S. Air Force for use in securing
certain U.S. Air Force bases in the U.S. and abroad.  Also in 1997,  the Company
sold $2.5 million of IONSCAN(R)s to a correctional  agency to assist in stemming
the flow of illegal drugs to inmates.

                  The  Company  markets  its  products  through  a direct  sales
organization  comprised of 18 sales people  located at its  headquarters  in New
Jersey and at offices in Toronto,  London,  Paris and Kuala Lumpur. In addition,
the   Company   utilizes  a  network  of  45   independent   sales  and  service
representatives  located in Europe, the Middle East, Africa, Asia, South America
and Australia.

                  The  Company was  incorporated  under the laws of the State of
Delaware on September 7, 1967.  The Company's  principal  executive  offices are
located at 219 South Street,  Murray Hill,  New Jersey 07974,  and its telephone
number is (908) 665-8200.

                                 USE OF PROCEEDS

                  If the Underwriter's  Warrant and the Warrants covered thereby
are  exercised in full at the prices set forth above,  the Company would receive
gross proceeds of approximately $1.6 million (prior to the deduction of fees and
expenses  incurred in connection  with this  Offering).  Other than the proceeds
received by the Company  from the  exercise  the  Underwriter's  Warrant and the
exercise of the Warrants  covered  thereby,  the Company will not receive any of
the  proceeds  from the  sale of the  Securities  offered  hereby.  The  Company
estimates   that  its  expenses  in   connection   with  the  Offering  will  be
approximately $15,000. The Company intends to use the net proceeds, if any, from
the exercise of  the  Underwriter's  Warrant  (including  the  exercise  of  the
Warrants covered thereby) for general corporate purposes.

                             SELLING SECURITYHOLDERS

                  The 156,250  shares of Common  Stock and  125,000  Warrants to
which this  Prospectus  relates will be offered from time to time by the Selling
Securityholders   named   in  the   following   table.   One   of  the   Selling
Securityholders, Janney Montgomery Scott, Inc. ("Janney Montgomery Scott") acted
as the  representative of the underwriters of the Company's November 1996 public
offering,  in which the  Company  sold  1,437,500  shares  of  Common  Stock and
1,437,500 Warrants.  In connection with such offering,  in addition to customary
underwriting  fees,  the  Company  issued  the  Underwriter's  Warrant to Janney
Montgomery  Scott.  The Company has filed the registration  statement,  of which
this Prospectus is a part, at the request of Janney Montgomery Scott pursuant to
the terms of the Underwriter's  Warrant.  See "Description of Warrants." Messrs.
William J. Barrett and Herbert M. Gardner,  officers of Janney Montgomery Scott,
have obtained  beneficial  interests in certain of the Securities covered by the
Underwriter's  Warrant.  In July 1996, Messrs.  Barrett and Gardner purchased 6%
Subordinated Convertible Debentures from the Company in the principal amounts of
$150,000  and $50,000,  respectively.  Upon  conversion  of such  debentures  in
December 1997, Messrs.  Barrett and Gardner received from the Company 54,545 and
18,181 shares of Common Stock, respectively.

                  The  following  table  sets  forth  certain  information  with
respect to the Selling  Securityholders.  All ownership information is as of May
1, 1998.
<TABLE>
<CAPTION>

<S>                 <C>               <C>            <C>              <C>            <C>            <C>
                                                      Common Stock                                      Warrants
                                                      Beneficially                                    Beneficially
                     Common Stock                      Owned After       Warrants                     Owned After
                     Beneficially       Maximum        Offering if     Beneficially     Maximum       Offering if
     Selling        Owned Prior to    Amount to be     Maximum is     Owned Prior to   Amount to       Maximum is
Securityholder      Offering (1)(2)     Sold (2)       Sold (1)(2)      Offering      be Sold (2)      Sold (1)(2)
                                                                          (1)(2)

                    Amount     %                      Amount    %     Amount    %                   Amount     %
Janney  Montgomery
Scott, Inc.           91,250  1.2       91,250        --        --    73,000  18.1   73,000         --         --

William J. Barrett    32,500   *        32,500        --        --    26,000   2.0   26,000         --         --

Herbert M.            32,500   *        32,500        --        --    26,000   2.0   26,000         --         --
Gardner
- ---------
*  Less than 1%
</TABLE>

(1)  Assumes  the  full  exercise  or  conversion  of  outstanding   convertible
securities, warrants, rights or options for such person or entity.

(2)  Certain   amounts   shown  here  are  subject  to   adjustment  in  certain
circumstances.


                              PLAN OF DISTRIBUTION

                  The  Securities  offered  hereby may be offered  and sold from
time to time by the Selling  Securityholders  upon exercise of the Underwriter's
Warrant by Janney Montgomery  Scott. In addition,  the Warrants may be exercised
by the holders  thereof by  tendering  the  exercise  price,  together  with the
warrant  certificate and exercise form, to the Company before November 12, 1999,
the expiration date of the Warrants.

                  The   distribution   of  the   Securities   by   the   Selling
Securityholders,  or by their respective pledgees,  donees, transferees or other
successors  in  interest,  may be  effected  from  time  to  time in one or more
transactions  on the  Nasdaq  National  Market  System,  in  special  offerings,
exchange  distributions  and/or  secondary  distributions  pursuant  to  and  in
accordance with the applicable  rules of the National  Association of Securities
Dealers,   Inc.  ("NASD"),   in  the  over-the-counter   market,  in  negotiated
transactions (including, without limitation, privately negotiated transactions),
through the writing of options on the  Securities or, or through the issuance of
other securities convertible into such Securities (whether such options or other
securities are listed on an options or securities  exchange or otherwise),  or a
combination of such methods of distribution,  at market prices prevailing at the
time  of  sale,  at  prices  related  to such  prevailing  market  prices  or at
negotiated prices. 

                  Any or all of the  Securities may be sold from time to time to
purchasers directly by the Selling Securityholders. Sales of Securities also may
be made pursuant to Rules 144, 144A or 904 of the Securities Act,  provided that
the requirements of such rules,  including,  without limitation,  any applicable
holding  periods  and manner of sale  requirements,  are met.  Alternatively,  a
Selling  Securityholder may from time to time offer any or all of the Securities
through underwriters,  dealers,  brokers or agents, including in transactions in
which any such underwriters,  dealers, brokers or agents solicit purchasers,  in
block transactions or in transactions in which any such  underwriters,  dealers,
brokers,  or agents  will  attempt to sell such  Securities  as an agent but may
resell such Securities as a principal pursuant to this Prospectus.

                  Any underwriters,  dealers, brokers or agents participating in
the  distribution of the Securities  offered hereby may receive  compensation in
the form of  underwriting  discounts,  concessions,  commissions  or fees from a
Selling Securityholder and/or purchasers of the Securities for whom they may act
as agents (which  compensation  may be in excess of customary  commissions).  In
addition, a Selling Securityholder and any such underwriters,  dealers,  brokers
or agents that  participate in the  distribution of the Securities may be deemed
to be  "underwriters"  within the meaning of Section 2(11) of the Securities Act
and any  commissions  received  by them  and any  profit  on the  resale  of the
Securities  may be  deemed  to be  underwriting  compensation.  Additionally,  a
Selling  Securityholder  may pledge the Securities,  and in such event agents or
dealers may acquire the Securities or interests  therein,  and may, from time to
time, effect distribution of the Securities or interests in such capacity.


                             DESCRIPTION OF WARRANTS

                  The following is a brief summary of certain  provisions of the
Warrants.  Such  summary does not purport to be complete and is qualified in all
respects by reference to the actual text of the Warrant  Agreement (the "Warrant
Agreement") between the Company and American Stock Transfer & Trust Company (the
"Warrant  Agent").  A copy of the Warrant  Agreement  has been  incorporated  by
reference as an exhibit to the  Registration  Statement of which this Prospectus
is a part.

Exercise Price and Terms

                  Each  Warrant  entitles  the  registered   holder  thereof  to
purchase  one-quarter  of a share of Common Stock at an exercise price of $9.847
per share prior to November 12, 1999 subject to adjustment  in  accordance  with
the  anti-dilution  and other  provisions  referred to below.  The holder of any
Warrant may exercise such Warrant by surrendering  the certificate  representing
the Warrant to the Warrant Agent,  with the  subscription  form thereon properly
completed  and  executed,  together  with  payment of the  exercise  price.  The
Warrants may be exercised at any time in whole or in part at the exercise  price
then in effect until  expiration or  redemption  of the Warrants.  No fractional
shares will be issued upon the exercise of the Warrants.

                  The exercise price of the Warrants was set at a premium to the
then-existing  market price of the Common Stock and have no  relationship to any
objective  criteria  of future  value  and,  accordingly,  should in no event be
regarded as an indication of any future market price of the  Securities  offered
hereby.

Adjustments

                  The  exercise  price and the number of shares of Common  Stock
purchasable upon the exercise of the Warrants are subject to adjustment upon the
occurrence  of  certain  events,   including  stock  dividends,   stock  splits,
combinations or reclassifications of the Common Stock, or sale by the Company of
shares of its Common  Stock or other  securities  convertible  into Common Stock
(exclusive  of shares  issued upon the  exercise or  conversion  of  outstanding
options,  warrants and convertible securities) at a price below the market price
(as defined) of the Common Stock.  Additionally,  an adjustment would be made in
the case of a  reclassification  or exchange of Common Stock,  consolidation  or
merger  of  the  Company  with  or  into  another   corporation  (other  than  a
consolidation  or merger in which the Company is the surviving  corporation)  or
sale of all or substantially all of the assets of the Company in order to enable
Warrant  holders  to  acquire  the kind and  number  of shares of stock or other
securities  or  property  receivable  in such event by a holder of the number of
shares of Common  Stock  that  might  otherwise  have  been  purchased  upon the
exercise of the Warrants.

Redemption Provisions

                  The Warrants  are subject to  redemption  by the  Company,  at
$0.25 per Warrant (subject to adjustment under certain circumstances),  upon not
less than 30 days' prior written notice, if the bid price of the Common Stock as
reported  by Nasdaq  averages  in excess  of 200% of the  exercise  price of the
Warrants for a period of 30 days ending within 15 days of the redemption  notice
date. In the event that the Company  exercises the right to redeem the Warrants,
such  Warrants will be  exercisable  until the close of business on the date for
redemption fixed in the redemption  notice. If any Warrant called for redemption
is not  exercised by such time, it will cease to be  exercisable  and its holder
will be entitled only to the redemption price.

Transfer, Exchange and Exercise

                  The  Warrants are in  registered  form and may be presented to
the Warrant Agent for transfer,  exchange or exercise at any time on or prior to
the earlier of (i) the business day prior to the redemption  date, or (ii) their
expiration  date,  November 12, 1999,  at which time the Warrants  become wholly
void and of no value. If a market for the Warrants develops, the holder may sell
the Warrants  instead of exercising  them.  There can be no assurance,  however,
that a market for the Warrants will develop or continue.

Warrant Holder Not a Stockholder

                  The Warrants do not confer upon  holders any voting,  dividend
or other rights as stockholders of the Company.

Modification of Warrants

                  The Company and the Warrant Agent may make such  modifications
to the  Warrants as they deem  necessary  and  desirable  that do not  adversely
affect the  interests  of the  warrant  holders.  The  Company  may, in its sole
discretion,  lower the  exercise  price of the Warrants for a period of not less
than  thirty  days on not less than thirty  days'  prior  written  notice to the
warrant  holders  and  Janney  Montgomery  Scott.  Except  as  described  above,
modification  of the number of securities  purchasable  upon the exercise of any
Warrant,  the exercise price and the expiration date with respect to any Warrant
or any other modification to the Warrants requires the consent of the holders of
two-thirds of the outstanding Warrants.

                  The Warrants are not  exercisable  unless,  at the time of the
exercise,  the Company has a current  prospectus  covering  the shares of Common
Stock  issuable  upon  exercise  of the  Warrants,  and such  shares  have  been
registered,  qualified or are deemed to be exempt under the  securities  laws of
the state of residence of the  exercising  holder of the Warrants.  Although the
Company  will use its  best  efforts  to have all the  shares  of  Common  Stock
issuable upon exercise of the Warrants  registered or qualified on or before the
exercise date and to maintain a current  prospectus  relating  thereto until the
expiration of the Warrants, there can be no assurance that it will be able to do
so.

        SECURITIES AND EXCHANGE COMMISSION'S POSITION ON INDEMNIFICATION

                  Article Tenth of the Company's  Certificate  of  Incorporation
and Section 10 of the Company's  by-laws,  as amended,  provide that the Company
shall, to the fullest extent permitted by law,  indemnify each person (including
the heirs, executors,  administrators and other personal representatives of such
person) against  expenses  (including  attorneys'  fees),  judgments,  fines and
amounts paid in settlement,  actually and reasonably  incurred by such person in
connection  with any  threatened,  pending or actual suit,  action or proceeding
(whether  civil,   criminal,   administrative  or  investigative  in  nature  or
otherwise) in which such person may be involved by reason of the fact that he or
she is or was a  director  or officer  of the  Company  or is serving  any other
incorporated  or  unincorporated  enterprise  in any of such  capacities  at the
request of the  Company.  Such  provisions  may provide  indemnification  to the
officers,  directors or controlling  persons of the Company for liability  under
the Securities Act.

                  Insofar as indemnification  for liabilities  arising under the
Securities Act may be permitted to directors,  officers and controlling  persons
of the  registrant  pursuant to the  foregoing  provisions,  or  otherwise,  the
registrant  has been advised that in the opinion of the  Securities and Exchange
Commission  such  indemnification  is against  public policy as expressed in the
Securities Act and is, therefore, unenforceable.

                                  LEGAL MATTERS

                  Certain  matters  with respect to the validity and legality of
the  Securities  offered  hereby  have  been  passed  upon  for the  Company  by
Lowenstein Sandler PC, Roseland, New Jersey.

                                     EXPERTS

                  The financial  statements and schedule of the Company included
in the 1997 Form 10-KSB and  incorporated  by reference in this  Prospectus  and
elsewhere in the Registration  Statement have been audited by BDO Seidman,  LLP,
independent certified public accountants,  to the extent and for the periods set
forth in their  report  incorporated  herein by reference  and are  incorporated
herein in reliance  upon such report  given upon the  authority  of said firm as
experts in auditing and accounting.


<PAGE>



No dealer,  salesman or any other person
has   been   authorized   to  give   any
information     or    to    make     any
representations  in connection with this
offering  other than those  contained in
this  Prospectus  and, if given or made,
such     other      information      and
representations  must not be relied upon
as  having   been   authorized   by  the
Company.  Neither  the  delivery of this
Prospectus  nor any sale made  hereunder
shall, under any  circumstances,  create
any  implication  that there has been no
change  in the  affairs  of the  Company                   156,250 Shares     
since  the  date   hereof  or  that  the                 of Common Stock      
information  contained herein is correct                                      
as of any time  subsequent  to its date.                       and            
This  Prospectus  does not constitute an                                      
offer  to sell or a  solicitation  of an              125,000 Common Stock    
offer  to  buy  such  securities  in any                Purchase Warrants     
circumstances  in  which  such  offer or                                      
solicitation is unlawful.                                                     
                                                    BARRINGER TECHNOLOGIES INC.
                                                                              
                                                    

                                                          ______________

                                                            PROSPECTUS
                                                          ______________

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

                    TABLE OF CONTENTS

                                                  Page      _______, 1998

Available Information................................ 2
Incorporation of Certain
  Documents by Reference............................. 2
Forward-Looking Statements........................... 3
Risk Factors......................................... 4
The Company..........................................11 
Use of Proceeds......................................12
Selling Securityholders..............................12
Plan of Distribution.................................12
Description of Warrants..............................13
Securities and Exchange Commission's
  Position on Indemnification........................15
Legal Matters........................................15
Experts  ............................................15





<PAGE>


                                                       
                                     PART II

                     Information Not Required in Prospectus

Item 14. Other Expenses of Issuance and  Distribution  

                  The following  table lists the expenses which will be incurred
in  connection  with the  issuance  and  distribution  of the  Securities  being
registered.


                                                                Expense
Securities and Exchange Commission Registration  Fee            $   478
Accounting Fees and Expenses                                      5,000
Legal Fees and Expenses                                           5,000
Blue Sky Fees and Expenses                                        1,000
Printing and Engraving                                            1,000
Miscellaneous                                                     2,522
TOTAL                                                           $15,000

                  All of the above amounts (other than the filing fee payable to
the Securities  and Exchange  Commission)  are estimates  only. All of the above
expenses will be paid by the Company.

Item  15.  Indemnification of Directors and Officers

                  The Certificate of Incorporation, as amended (the "Certificate
of Incorporation"),  and the Company's by-laws, as amended ("By-laws"),  provide
that the Company shall, to the fullest extent  permitted by law,  indemnify each
person  (including  the  heirs,  executors,  administrators  and other  personal
representatives  of such person) against expenses  (including  attorneys' fees),
judgments,  fines  and  amounts  paid in  settlement,  actually  and  reasonably
incurred by such person in  connection  with any  threatened,  pending or actual
suit,  action  or  proceeding  (whether  civil,   criminal,   administrative  or
investigative  in nature or  otherwise)  in which such person may be involved by
reason of the fact that he or she is or was a director or officer of the Company
or is serving any other incorporated or unincorporated enterprise in any of such
capacities at the request of the Company.

                  Section  145 of the  General  Corporation  Law of the State of
Delaware (the "GCL") permits a corporation,  under specified  circumstances,  to
indemnify  its  directors,   officers,  employees  or  agents  against  expenses
(including  attorney's  fees),  judgments,  fines and amounts paid in settlement
actually and reasonably  incurred by them in connection with any action, suit or
proceeding  brought by third parties by reason of the fact that they were or are
directors,  officers, employees or agents of the corporation, if such directors,
officers,  employees  or  agents  acted  in  good  faith  and in a  manner  they
reasonably  believed  to be in or not  opposed  to  the  best  interests  of the
corporation  and,  with respect to any  criminal  action or  proceeding,  had no
reason to believe their conduct was unlawful.  In a derivative action, i.e., one
by or in the  right of the  corporation,  indemnification  may be made  only for
expenses actually and reasonably incurred by directors,  officers,  employees or
agents in connection  with the defense or  settlement of an action or suit,  and
only with  respect  to a matter as to which  they shall have acted in good faith
and in a manner  they  reasonably  believed  to be in or not opposed to the best
interests of the corporation,  except that no  indemnification  shall be made if
such person shall have been judged liable to the corporation  unless and only to
the  extent  that the  court in  which  the  action  or suit was  brought  shall
determine upon application that the defendant directors,  officers, employees or
agents are fairly and reasonably entitled to indemnity for such expenses despite
such adjudication of liability.

                  The  Certificate  of  Incorporation  also contains a provision
limiting the personal  liability of directors to the fullest extent permitted or
authorized by the GCL or other  applicable  law.  Under the GCL, such  provision
would not limit liability of a director for (i) breach of the director's duty of
loyalty,  (ii) acts or  omissions  not in good  faith or  involving  intentional
misconduct  or  knowing   violation  of  law,  (iii)  payment  of  dividends  or
repurchases or redemptions of stock other than from lawfully available funds, or
(iv) any transactions from which the director derives an improper benefit.

Item 16.  Exhibits 

       The following exhibits are filed as part of this Registration Statement:

3.1    Certificate of Incorporation of the Company, as amended.
3.2    By-laws of the Company.
4.1    Form of Warrant Agreement
4.2    Form of Warrant Agreement with Janney Montgomery Scott, Inc.
5.1    Opinion of Lowenstein Sandler PC.
23.1   Consent of BDO Seidman, LLP.
23.2   Consent of Lowenstein Sandler PC (included in Exhibit 5.1)
24.1   Power of Attorney (included on signature page).


Item 17. Undertakings        


       The undersigned registrant hereby undertakes:              


              (1) To  file,  during  any  period  in which  it  offers  or sells
securities, a post-effective amendment to this Registration Statement to:

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

                  (ii)  Reflect  in the  prospectus  any facts or events  which,
individually or together,  represent a fundamental  change in the information in
the  registration  statement.  Notwithstanding  the  foregoing,  any increase or
decrease  in the 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 a 20%  change  in the  maximum  aggregate  offering  price set forth in the
"Calculation of Registration Fee" table in the effective registration statement;
and

                  (iii) Include any additional or changed  material  information
with respect to the plan of distribution.


         Provided,  however,  that paragraphs (1)(i) and (1)(ii) do not apply if
the  registration  statement  is on  Form  S-3,  Form  S-8 or  Form  F-3 and the
information  required  to be  included in a  post-effective  amendment  by those
paragraphs  is  contained  in periodic  reports  filed with or  furnished to the
Commission  by the  Company  pursuant  to  section  13 or  section  15(d) of the
Exchange Act that are incorporated by reference in the registration statement.

              (2) That, for the purpose of determining  any liability  under the
Securities Act, each such  post-effective  amendment 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.


              Insofar  as  indemnification  for  liabilities  arising  under the
Securities Act may be permitted to directors,  officers and controlling  persons
of the  registrant  pursuant to the  foregoing  provisions,  or  otherwise,  the
registrant  has been advised that in the opinion of the  Securities and Exchange
Commission  such  indemnification  is against  public policy as expressed in the
Securities Act and is, therefore,  unenforceable.  In the event that a claim for
indemnification  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  Securities
Act and will be governed by the final adjudication of such issue.


<PAGE>


                                   SIGNATURES

              Pursuant to the  requirements  of the  Securities Act of 1933, the
registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-3 and has duly caused this amendment to
its  registration  statement  to be  signed on its  behalf  by the  undersigned,
thereunto duly authorized,  in the City of Murray Hill, State of New Jersey,  on
May 28, 1998.


                                             BARRINGER TECHNOLOGIES INC.        

                                             By: /S/ STANLEY S. BINDER
                                             ---------------------------
                                             Stanley S. Binder, President and
                                             Chief Executive  Officer 


     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
registration  statement  has  been  signed  by  the  following  persons  in  the
capacities  indicated  below on May 28, 1998.   Each of the  undersigned  hereby
constitutes and appoints Stanley S. Binder and Richard S. Rosenfeld, and each of
them,  his true and  lawful  attorneys-in-fact  and  agents,  with full power of
substitution  and  resubstitution,  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  on  Form  S-3  relating  to  the
securities  offered  pursuant  hereto  and to file the same,  together  with all
exhibits  thereto  and  other  documents  in  connection  therewith,   with  the
Securities and Exchange  Commission and such other state and federal  government
commissions  and agencies as may be necessary or  advisable,  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 his  substitute or  substitutes,
may lawfully do or cause to be done by virtue hereof.



Signature                       Title

/S/ STANLEY S. BINDER           President, Chief Executive Officer
- ------------------------------- (Principal Executive Officer) and
Stanley S. Binder               Director

/S/ JOHN D. ABERNATHY
- -------------------------------
John D. Abernathy               Director

/S/ RICHARD D. CONDON
- -------------------------------
Richard D. Condon               Director

/S/ JOHN H. DAVIES
- -------------------------------
John H. Davies                  Director

/S/ JOHN H. HARTE
- -------------------------------
John J. Harte                   Director

JAMES C. MCGRATH
- -------------------------------
James C. McGrath                Director

/S/ RICHARD S. ROSENFELD
- -------------------------------
Richard S. Rosenfeld            Vice President-Finance, Chief Financial Officer
                                and Treasurer (Principal Accounting
                                and Principal Financial Officer)


<PAGE>


                                INDEX TO EXHIBITS

Exhibit
No.     Description

3.1     Certificate  of  Incorporation  of the Company,  as amended  (previously
        filed as Exhibit 3.1 to the  Company's  Registration  Statement  on Form
        SB-2 (File No. 333-33129) and incorporated herein by reference).

3.2     By-laws  of  the  Company  (previously  filed  as  Exhibit  3.2A  to the
        Company's  Annual  Report on Form  10-K/A-2  for the  fiscal  year ended
        December  31,  1994  (File  No.  0-3207)  and  incorporated   herein  by
        reference).

4.1     Form of  Warrant  Agreement  (previously  filed  as  Exhibit  4.1 to the
        Company's  Registration  Statement on Form SB-2 (File No. 333-13703) and
        incorporated herein by reference).

4.2     Form of Warrant Agreement with Janney Montgomery Scott (previously filed
        as Exhibit  4.2 to the  Company's  Registration  Statement  on Form SB-2
        (File No. 333-13703) and incorporated herein by reference).

5.1     Opinion of Lowenstein Sandler PC.

23.1    Consent of BDO Seidman, LLP.

23.2    Consent of Lowenstein Sandler PC (included in Exhibit 5.1)

24.1    Power of Attorney (included on signature page).





John D. Hogoboom                           Tel  973.597.2382  Fax  973.597.2383
Member of the Firm                                     [email protected]

May 27, 1998

Barringer Technologies Inc.
219 South Street
New Providence, New Jersey 07974

Dear Sirs:

In connection with the registration under the Securities Act of 1933, as amended
(the "Act"),  of (i) 125,000  shares of common stock,  par value $0.01 per share
(the "Common Stock"),  of Barringer  Technologies  Inc., a Delaware  corporation
(the "Company")  issuable upon exercise of warrants issued by the Company to the
managing  underwriter of its November 1996 public  offering (the  "Underwriter's
Warrants")  (together  with such  indeterminate  number of additional  shares of
Common Stock as may become issuable pursuant to the anti-dilution  provisions of
the  Underwriter's  Warrants,  the "Shares"),  (ii) 125,000 warrants to purchase
shares of Common Stock  issuable  upon  exercise of the  Underwriter's  Warrants
(together with such indeterminate  number of additional purchase warrants as may
become issuable  pursuant to the  anti-dilution  provisions of the Underwriter's
Warrants,  the  "Purchase  Warrants"),  and (iii) 31,250  shares of Common Stock
issuable  upon  the  exercise  of the  Purchase  Warrants  (together  with  such
indeterminate number of additional shares of Common Stock as may become issuable
pursuant to the anti-dilution provisions of the Purchase Warrants, the "Purchase
Warrant  Shares"),  we have examined such corporate  records,  certificates  and
other  documents and such  questions of law as we have  considered  necessary or
appropriate for the purposes of this opinion.

Upon the basis of such examination, we advise you that, in our opinion, (i) when
the Shares  have been duly issued by the  Company  upon the due  exercise of the
Underwriter's  Warrants  so that the  number  of shares  of  Common  Stock  then
outstanding  does  not  exceed  the  number  of  shares  of  Common  Stock  then
authorized,  and the Company has received  payment in full of the exercise price
therefor,  the Shares will be duly  authorized,  validly issued,  fully paid and
non-assessable, (ii) upon the due exercise of the Underwriter's Warrants and the
Company's  receipt of the purchase price  therefor,  the Purchase  Warrants will
constitute  valid and legally  binding  obligations  of the Company,  subject to
bankruptcy,  insolvency,  fraudulent  transfer,  reorganization,  moratorium and
similar laws of general applicability relating to or affecting creditors' rights
and to general equity principles,  and (iii) subject to the opinion set forth in
clause (ii) above, when the Purchase Warrant Shares have been duly issued by the
Company  upon the due  exercise of the  Purchase  Warrants so that the number of
shares of Common Stock then  outstanding does not exceed the number of shares of
Common Stock then  authorized,  and the Company has received  payment in full of
the  exercise  price  therefor,   the  Purchase  Warrant  Shares  will  be  duly
authorized, validly issued, fully paid and non-assessable.

We  hereby  consent  to  the  filing  of  this  opinion  as an  exhibit  to  the
Registration  Statement  and to the  reference  to us under the  heading  "Legal
Matters" in the Prospectus. In giving such consent, we do not thereby admit that
we are in the category of persons whose  consent is required  under Section 7 of
the Act.

Very truly yours,

LOWENSTEIN SANDLER PC




CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS

Barringer Technologies Inc.
Murray Hill, New Jersey


We  hereby  consent  to  the   incorporation  by  reference  in  the  Prospectus
constituting a part of this Registration  Statement of our report dated February
19, 1998 (March 13, 1998 as  to Note 16), relating to the consolidated financial
statements  and  schedule  of  Barringer  Technologies  Inc.  appearing  in  the
Company's Annual Report on Form 10-K for the year ended December 31, 1997.

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



/s/BDO SEIDMAN
_____________________________
BDO SEIDMAN, LLP

Woodbridge, New Jersey
May 27, 1998



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