SECOND AMENDMENT AGREEMENT


                                    among


                            VICON INDUSTRIES, INC.


                                     and


IBJ SCHRODER BANK & TRUST COMPANY




       Amending the Credit Agreement among
            VICON INDUSTRIES, INC
and IBJ SCHRODER BANK & TRUST COMPANY, dated as of December 27, 1995, as amended
 by the First Amendment Agreement, dated as of August 19, 1996




            Dated as of February 5, 1997






        THIS SECOND AMENDMENT AGREEMENT dated as of February 5,1997 (this
"Amendment")  among  VICON  INDUSTRIES,   INC.,  a  New  York  corporation  (the
"Borrower")  and  IBJ  SCHRODER  BANK  &  TRUST  COMPANY,  a  New  York  banking
corporation (the "Bank"),


                             W I T N E S S E T H:

       WHEREAS,  the Borrower and the Bank have entered into a Credit  Agreement
dated as of December 27,  1995,  as amended by that First  Amendment  Agreement,
dated as of August 19, 1996 (collectively, the "Agreement"; the terms defined in
the Agreement are used in this  Amendment as in the Agreement  unless  otherwise
defined in this Amendment); and

       WHEREAS,  the Borrower desires,  and the Bank is willing on the terms and
conditions  set forth below,  to modify  certain terms of the Agreement in order
to, among other things, increase the Commitment;

       NOW, THEREFORE,  in consideration of the mutual premises herein contained
and other good and valuable consideration,  the receipt and sufficiency of which
are hereby  acknowledged,  the  Borrower  and the Bank have  agreed to amend the
Agreement as hereinafter set forth:

     SECTION  1.  Amendment  to  Agreement.  The  Agreement  is,  subject to the
satisfaction of the conditi9ns to  effectiveness  set forth in Section 2 hereof,
hereby amended as follows:

       (a)    The definitions of "Applicable Margin,"  "Commitment" and "Formula
Amount"  1.01  (Defined  Terms) of the  Agreement  are  amended to read in their
entirety as follows:

              "'Applicable Margin' shall mean, with respect to any Loan, one
              percent (1.0%) per annum."

              "'Commitment' shall mean the Bank's commitment to make Loans prior
              to the  Commitment  Expiration  Date up to the  maximum  aggregate
              principal  amount  equal  to (i)  prior  to the  Second  Amendment
              Effective  Date,  $5,500,000  and  (ii) on and  after  the  Second
              Amendment Effective Date,  $6,500,000 at any time outstanding,  as
              referred to in Section 2.01(a)."

              "'Commitment  Expiration  Date" shall mean (i) prior to the Second
              Amendment  Effective  Date,  December  31, 1997 and (ii) on and 
              after the Second Amendment Effective Date, January 31, 1999."

              "'Formula  Amount' shall mean, as at any date at which the same is
              to be determined, an amount equal to the sum of (a) 80 per cent of
              the amount of Eligible  Accounts  Receivable as at such date, plus
              (b) (i) prior to the Second Amendment  Effective Date, 25 per cent
              and (ii) on and after the Second





Amendment  Effective  Date,  30 per  cent of the  value  of  Eligible  Inventory
consisting of finished goods of the Borrower, provided, however, that the amount
calculated  pursuant to (b) shall not exceed $3,000,000;  and minus such reserve
as deemed necessary or appropriate by the Bank to reflect any contingencies,  or
the  consequences  of any breach or  contravention  of laws,  including  without
limitation,  Environmental  Laws and laws related to OSHA, by the Borrower.  The
Bank may, in its sole discretion, at any time or times upon three Business Days'
prior  notice to the  Borrower,  increase or decrease  the ratio of its advances
against Eligible Accounts Receivable or Eligible Inventory, or both, and, in the
event that any such ratio shall be decreased for any reason, such decrease shall
become  effective  immediately for purposes of calculating the maximum amount of
new Loans  hereunder  and the maximum  amount of Loans which may be  outstanding
hereunder.  The Borrower acknowledges that such changes in the ratio of advances
against  Eligible  Accounts  Receivable  and Eligible  Inventory may require the
immediate prepayment of Loans by the Borrower."

              "Interest Coverage Ratio" shall mean, for any period for which the
              same  is  to  be  determined,  the  ratio  of  (a)  earnings  from
              continuing  operations  of the Borrower  before  interest,  taxes,
              depreciation and amortization  (excluding  amortization of gain on
              sale  and  leaseback  transactions)  for  such  period,  provided.
              however  that the  calculation  of such  earnings  for the  Period
              1/1/97 - 3/31/97 shall exclude the amount of losses  incurred with
              respect to moving expenses related to the Borrower's new corporate
              offices not to exceed [$175,000] (which represents  losses) in the
              aggregate,  to (b) the  interest  expense of the Borrower for such
              period net of all intercompany interest,  determined in accordance
              with GAAP.

       (b)    Section 1.01 (Defined Terms) of the Agreement is hereby amended by
              adding the following definitions in the proper alphabetical order:

              "'Second  Amendment'  shall  mean the Second  Amendment  Agreement
              dated as of February 5, 1997 between the Borrower and the Bank."

              "'Second  Amendment  Effective  Date' shall mean the date on which
              the conditions in Section 2 of the Second  Amendment are satisfied
              or waived by the Bank."

       (c)    Subsection (b) of Section 2.07 (Optional Prepayments of the Loans)
              is hereby amended to read in its entirety as follows:

              "(b) The  Borrower  may,  upon at least ten  Business  Days' prior
              written  notice to the Bank,  elect to  terminate  or  permanently
              reduce the Commitment not more than once during any Fiscal Quarter
              in  an  amount  not  less  than  $250,000  with  such   additional
              increments in integral  multiples of $100,000;  provided.  however
              that (i) any reduction of the  Commitment  shall be accompanied by
              prepayment of Loans,  together with accrued interest on the amount
              prepaid  to the date of such  prepayment,  to the  extent (if any)
              that the aggregate  principal amount of the Loans then outstanding
              exceeds the amount of the  Commitment  as then  reduced,  (ii) any
              such  termination  of  the  Commitment  shall  be  accompanied  by
              prepayment  in lull of all Loans then  outstanding;  together with
              accrued  interest  thereon to the date of such  prepayment and any
              unpaid  commitment fee then accrued under Section  2.11(b) hereof,
              and by payment of a fee ("Commitment  Reduction Fee") equal to two
              per cent of the  amount  so  reduced  or  terminated  in the first
              twelve months following the date of execution and delivery of this
              Agreement,  and equal to  one-half of one percent of the amount so
              reduced or terminated for the period  beginning  December 27, 1996
              through the Commitment Expiration Date."




       (d)   Subsection (c) of Section 7.01 (Indebtedness) of the Agreement is
             hereby amended to read in its entirety as follows:

              "(c)  Indebtedness  of the Borrower which is unsecured (or secured
              by the Liens referred to in Section  7.02(c) and (d)) and incurred
              in the normal  course of business in connection  with  installment
              purchases or Capitalized  Leases of equipment or fixed assets,  in
              an  aggregate  amount  not  exceeding  $400,000  at any  one  time
              outstanding.

       (e)   Schedule 7.08 (Issuances and Dispositions of Securities) is hereby
             amended by adding the information contained on Exhibit A hereto to
             the end thereof.


       (f)   Subsection (A) of Section 9.03 (Net Income) of the Agreement is 
             hereby amended by adding the following proviso to the end thereof:

              ",provided.  however  that the  calculation  of Net Income for the
              Period 1/1/97-3/31/97 shall exclude the amount of losses incurred
              with respect to moving expenses related to the Borrower's new 
              corporate offices not to exceed [$175,000] (which represents
              losses) in the aggregate."

       (g)   Section 9.05 (Maximum Capital Expenditures) of the Agreement is 
             hereby amended in its entirety to read as follows"

              "During each Fiscal Year  including,  without  limitation,  Fiscal
              Year 1998, Capital Expenditures shall not exceed $500,000 per
              Fiscal  Year, provided, however, that during Fiscal Year 1997,
              Capital Expenditures shall not exceed $1,000,000."

       SECTION 2. Conditions to Effectiveness. This Amendment shall become 
effective only upon the satisfaction or waiver of all of the following
conditions precedent:

       (a) The Borrower and the Bank shall have duly executed and delivered this
Amendment  (whether  the  same or  different  copies)  and the Bank  shall  have
received a copy of this Amendment signed by the Borrower;

     (b) The Borrower and the Subordinated  Lenders shall have duly executed and
delivered  the First  Amendment  No. 1 and  Consent to  Subordination  Agreement
("Subordination Agreement Amendment"),  dated as of the date hereof (whether the
same or different copies),  substantially in the form attached hereto as Exhibit
B and the Bank  shall  have  received  a copy or  copies  of such  Subordination
Agreement Amendment signed by the Borrower and the Subordinated Lenders;



       (c) The  Borrower  shall  have duly  executed  and  delivered  the Second
Amended  and  Restated  Revolving  Credit  Note,  dated as of the  date  hereof,
substantially in the form attached hereto as Exhibit C;

     (d) The Bank  shall  have  received  the fees  and  expense  reimbursements
referred to in Section 5 hereof; and

       (e)  The  Bank  shall  have  received  such  other  documents,  opinions,
approvals or appraisals as the Bank may reasonably request.

       SECTION 3. Representations and Warranties. In order to induce the Bank to
enter into this Amendment,  the Borrower  hereby  represents and warrants to the
Bank that (i) it has the lull  power,  capacity,  right and legal  authority  to
execute,  deliver and perform its obligations under this Amendment and the other
Related  Documents  to which it is a  party,  and the  Borrower  has  taken  all
appropriate action necessary to authorize the execution and delivery of; and the
performance  of its  obligations  under  this  Amendment  and the other  Related
Documents to which it is a party, (ii) this Amendment, the Agreement (as amended
by this Amendment) and the other Related Documents  constitute legal,  valid and
binding  obligations  of  the  Borrower  enforceable  against  the  Borrower  in
accordance with its terms,  subject to the effect of any applicable  bankruptcy,
insolvency, reorganization or moratorium or similar laws affecting the rights of
creditors  generally,  (iii) the representations and warranties contained in the
Agreement and in each of the other Related  Documents to which it is a party are
true and  correct on and as of the date  hereof as though made on and as of such
date,  except for changes which have  occurred and which were not  prohibited by
the terms of the Agreement, (iv) no Default or Event of Default has occurred and
is continuing,  or would result from the execution,  delivery and performance by
the Borrower of this Amendment,  the Agreement (as amended by this Amendment) or
any of the other Related  Documents to which it is a party, and (v) the Borrower
is not in default in the payment or performance of any of its obligations  under
any mortgage,  indenture,  security  agreement,  contract,  undertaking or other
agreement or instrument  to which it is a party or which  purports to be binding
upon it or any of its properties or assets,  which default would have a material
adverse effect on the management,  business,  operations,  properties, assets or
condition  (financial or  otherwise)  of the  Borrower,  (vi) the Borrower is in
compliance with all applicable statutes,  laws, rules,  regulations,  orders and
judgments, the contravention or violation of which would have a material adverse
effect on the management, business, operations,  properties, assets or condition
(financial or otherwise) of the Borrower,  (vii) no material  adverse  change in
the business or assets,  or in the  condition  (financial  or  otherwise) of the
Borrower, and (viii) no litigation or administrative proceeding of or before any
court or governmental body or agency is now pending,  nor, to the best knowledge
of the Borrower upon  reasonable  inquiry,  is any such litigation or proceeding
now threatened  against the Borrower or any of its properties,  nor, to the best
knowledge of the Borrower upon  reasonable  inquiry,  is there a valid basis for
the  initiation  of any  such  litigation  or  proceeding,  which  if  adversely
determined  (after giving effect to all  applicable  insurance  coverage then in
existence)  would  have a material  adverse  effect on the  business,  assets or
condition (financial or otherwise) of the Borrower;




       SECTION 4. Reference to and Effect on the  Documents.  (A) Each reference
in the Agreement to "this Agreement",  '1hereunder", "hereof', "herein" or words
of like import,  and each  reference to the  Agreement in the Related  Documents
other than the  Agreement,  shall mean and be a reference  to the  Agreement  as
amended hereby.

       (B) Except as specifically  amended hereby,  the Agreement and all other
Related Documents, and all other documents, agreements,  instruments or writings
entered into in connection therewith,  shall remain in lull force and effect and
are hereby ratified,  confirmed and acknowledged by the Borrower. The amendments
set forth above are limited  precisely as written and shall not be deemed to (i)
be a consent to any waiver or modification of any other term or condition of the
Agreement or any document delivered pursuant thereto or (ii) prejudice any right
or rights  which the Bank may now or in the future have in  connection  with the
Agreement or the other Related Documents.

       (C) The execution, delivery and effectiveness of this Amendment shall not
operate as a waiver of any  right,  power or remedy of the Bank under any of the
Related  Documents,  nor constitute a waiver or modification of any provision of
any of the Related  Documents,  nor a waiver of any now  existing  or  hereafter
arising Defaults of Events of Default.

     SECTION 5. Fees and  Expenses.  (A) The Borrower  hereby  agrees to pay, or
cause to be paid to, the Bank a non-refundable amendment fee of$l0,000.

       (13) The Borrower  hereby agrees to pay the Bank on demand for all costs,
expenses,  charges and taxes (other than any income taxes  relating to income of
the Bank), including,  without limitation, all reasonable fees and disbursements
of  counsel,   incurred  by  the  Bank  in  connection  with  the   preparation,
negotiation,  administration  and  enforcement  of this  Amendment and the other
Related Documents to be delivered hereunder.

       SECTION 6. Governing  Law. This Amendment and the rights and  obligations
of the parties  hereunder  shall be governed by and construed and interpreted in
accordance  with the substantive  laws of the State of New York,  without regard
for its conflict of laws principles.

     SECTION 7. Headings. Section headings in this Amendment are included herein
for  convenience  of  reference  only and  shall not  constitute  a part of this
Amendment for any other purpose.

     SECTION 8. Successors. This Amendment shall be binding upon the successors,
assigns, heirs, executors and administrators of the parties hereto.

     SECTION.  9. Counterparts.  This Amendment may be executed in any number of
counterparts,  all of which taken  together  shall  constitute  one and the same
instrument,  and any party hereto may execute this Amendment by signing any such
counterpart.






        IN WITNESS  WHEREOF,  the  undersigned  have caused this Amendment to be
executed by their respective officers thereunto duly authorized,  as of the date
first above written.


                                VICON INDUSTRIES, INC.








                                IBJ SCHRODER BANK & TRUST COMPANY


                                 By:
                                 Name:
                                 Title: