EXHIBIT 10.23
                      NON-RECOURSE SECURED PROMISSORY NOTE


          FOR VALUE RECEIVED,  _______________  (the "Maker") hereby promises to
pay to the order of Barringer Technologies Inc. (the "Company"),  at its offices
at 30 Technology  Drive,  Warren,  New Jersey,  or at such other location as the
Company may designate from time to time, the sum of  $______________,  in lawful
money  of  the  United States  of  America on _________ (the  "Maturity  Date"),
together  with  interest  thereon, compounded annually, at a rate of ______% per
annum.  Interest  shall  be calculated  on  the  basis of a 365-day year for the
actual number of days elapsed.

          If the date any amount is due  hereunder is not a Business  Day,  then
such amount  shall be due and payable on the Business  Day next  succeeding  the
original payment date, together with interest thereon to the date of payment. As
used herein,  "Business  Day" means any day,  other than a Saturday or Sunday or
other  day on which  commercial  banks in New  Jersey  are open for the  general
transaction of business.

          If the Maker fails to pay any amount  hereunder  when due,  whether on
the Maturity Date, upon  acceleration or otherwise,  and such failure  continues
for a period of five (5) days or more,  interest shall thereafter  accrue on any
overdue  amounts at a rate of ____% per annum until paid in full. In such event,
the Maker also  shall pay to the  Company  the  reasonable  attorneys'  fees and
disbursements and all other out-of-pocket costs incurred by the Company in order
to collect  amounts  due and owing under this Note or  otherwise  to enforce the
Company's rights and remedies hereunder.

          The Maker  may  prepay  this  Note at any  time,  in whole or in part,
without premium or penalty.  Any partial  prepayments  shall be applied first to
accrued  interest and second to the payment of principal.  In the event that the
Maker sells,  transfers  or otherwise  disposes of some or all of the Shares (as
defined in the Pledge Agreement  referred to below),  whether on or prior to the
Maturity  Date,  the Maker  shall  promptly  apply  all or a portion  of the net
proceeds, if any, received by the Maker from such disposition to repay this Note
in an amount  equal to the  lesser of (i) the net  proceeds  received  from such
disposition, or (ii) the product obtained by multiplying the aggregate principal
and  interest  outstanding  hereunder  on the  date  of  such  disposition  by a
fraction,  the  numerator  of which is the number of Shares  disposed of in such
disposition and the denominator of which is the total number of Shares purchased
by the Maker in the transaction giving rise to this Note appropriately  adjusted
for any subsequent  stock splits,  stock dividends,  reclassifications  or other
similar changes in the  outstanding  shares of the Company's  common stock,  par
value $.01 per share (the "Common Stock").

          This Note shall  mature and all amounts  due  hereunder  shall  become
immediately due and payable,  without demand and without notice to the Maker, in
the event that (a) the Maker  sells,  transfers  or  otherwise  disposes  of all
Shares  then owned by him,  (b) the Maker (i) becomes  insolvent,  (ii) makes an
assignment for the benefit of his creditors generally, or (iii) files a petition
seeking  protection  under the United  States  Bankruptcy  Code or  seeking  the
appointment  of a receiver,  trustee or custodian for the Maker or a substantial
portion  of his  assets,  or (d)  any  other  person 

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or entity (i) files an involuntary  petition under the United States  Bankruptcy
Code  with  respect  to the  Maker,  or (ii)  commences  an action  seeking  the
appointment  of a receiver,  trustee or custodian for the Maker or a substantial
portion of his assets,  and such  petition  or action  remains  undismissed  and
unstayed for more than sixty (60) consecutive days.

          In the event  that the Maker  ceases  for any reason to be a member of
the Board of Directors of the Company, this Note shall mature and become due and
payable on the earlier of (i) the Maturity Date and (ii) the second  anniversary
of the effective date of such cessation.

          The Maker shall have the right to repay the amounts due hereunder,  in
whole but not in part,  by  surrendering  the Shares to the  Company.  The Maker
shall effect such  surrender by notifying  the Company in writing that the Maker
irrevocably  elects to surrender  the Shares to the Company as provided  herein,
which election  shall be accompanied by stock powers  endorsed in blank or other
transfer  documents  in proper form to effect the  transfer of the Shares to the
Company or its nominee with all signatures guaranteed and a certification by the
Maker that the Shares are owned by the Maker free and clear of any lien,  claim,
encumbrance or adverse claim  whatsoever,  other than as created pursuant to the
Pledge Agreement  referred to below. Upon receipt of such election and the other
documentation  described above, the Company shall have the right to transfer the
Shares to itself or its nominee,  free and clear of any claim or interest of the
Maker.  In the event that the Maker  surrenders  Shares to the Company having an
aggregate  Fair Market Value (as defined below) in excess of the amounts due and
owing hereunder, the Company shall pay to the Maker the amount of such excess in
cash,  without  interest,  on or prior to the  close of  business  on the  third
Business Day after such surrender.

          For purposes hereof, each Share shall have a "Fair Market Value" equal
to the last  reported  sale price for the Common Stock as reported on the Nasdaq
National Market or any national securities exchange on which the Common Stock is
then  traded on the  trading  day  immediately  preceding  the date on which the
Shares are surrendered to the Company. In the event that the Common Stock is not
then included on the Nasdaq National  Market or traded on a national  securities
exchange,  the "Fair  Market  Value" of a share of Common  Stock shall  mutually
agreed  to in good  faith  by the  Board of  Directors  of the  Company  (or its
designee) and the Maker.

          This Note is the Note referred to in the Pledge  Agreement,  dated the
date hereof,  between the Maker and the Company and is secured by the Shares and
the other Collateral  described therein. The Pledge Agreement grants the Company
certain rights with respect to the Collateral  upon certain  defaults  specified
therein.

          The Company's  sole recourse for the payment of amounts due under this
Note shall be limited to the Collateral  securing this Note. . THE COMPANY SHALL
NOT HAVE THE RIGHT TO ENFORCE  THIS NOTE AGAINST THE MAKER,  HIS HEIRS,  ASSIGNS
AND LEGAL  REPRESENTATIVES  OR ANY OF THE OTHER ASSETS OR PROPERTY OF ANY OF THE
FOREGOING.

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          No delay on the part of the  holder  of this  Note in  exercising  any
power or right  hereunder  shall operate as a waiver of any such power or right;
nor shall any  single or partial  exercise  of any power or right  preclude  any
other or further  exercise of such power or right,  or the exercise of any other
power or  right,  and no waiver  whatsoever  shall be valid  unless in  writing,
signed by the holder of this Note,  and then only to the  extent  expressly  set
forth  therein.  The Maker waives  presentment,  demand for payment,  diligence,
notice of  dishonor  and all other  notices or demands  in  connection  with the
delivery, acceptance, performance, default or indorsement of this Note.

          This Note shall be governed by, and construed in accordance  with, the
laws  of the  State  of New  Jersey,  without  reference  to the  choice  of law
provisions  thereof.  The Maker  hereby  consents  and submits to the  exclusive
jurisdiction  of the federal and state courts located in the State of New Jersey
having  subject  matter  jurisdiction  in  connection  with any and all disputes
arising out of or in connection  with this Note.  The Maker hereby  consents and
agrees  that  service of  process by the  Company  shall be deemed  validly  and
properly  effected  against the Maker upon the mailing of a copy of such process
by certified mail, postage prepaid, to the Maker at his address as it appears in
the personnel records of the Company.

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Witness:



______________________                                    _____________________
Name:                                                     Name:


Dated: