<PAGE>

                                  AMENDMENT
                                      TO
                         LOAN AND SECURITY AGREEMENT
                                       

    This Amendment to Loan and Security Agreement is entered into as of 
August 18, 1997, by and between SILICON VALLEY BANK ("Bank") and QUALMARK 
CORPORATION ("Borrower").

                                   RECITALS

    Borrower and Bank are parties to that certain Loan and Security Agreement 
dated as of April 30, 1996, as amended (the "Agreement").  The parties desire 
to amend the Agreement in accordance with the terms of this Amendment.

    NOW, THEREFORE, the parties agree as follows:

    1.   The following definitions in Section 1.1 are amended to read as 
follows:

         "Committed Line" means One Million Three Hundred Thousand Dollars 
($1,300,000).

         "Maturity Date" means August 17, 2000, provided Advances may be 
requested under Section 2.1 only through August 17, 1998, on which date all 
Advances under Section 2.1 shall be due and payable.

    2.   The second sentence of the first paragraph of Section 2.1 is amended 
to read as follows:

         For purposes of this Agreement, "Borrowing Base" shall mean an 
amount equal to seventy percent (70%) of Eligible Accounts.

    3.   Section 2.1.2 is added to the Agreement, as follows:

         2.1.2     EQUIPMENT ADVANCE.

              (a)  Not later than September 25, 1997, Borrower may request one
    (1) advance (the "Equipment Advance") from Bank in an aggregate principal
    amount equal to the lesser of Two Hundred Thousand Dollars ($200,000) or
    Sixty Five Percent (65%) of the book value of Equipment approved by Bank to
    be financed by the Equipment Advance.

              (b)  Interest shall accrue from the date of the Equipment Advance
    at a floating rate equal to the Prime Rate plus One and Three-quarters
    Percent (1.75%) per annum.  The Equipment Advance will be payable in
    thirty-six (36) equal monthly installments of principal, plus accrued
    interest, on the seventeenth day of each month beginning September 17,
    1997.  The entire principal balance and all accrued but unpaid interest
    shall be due and payable on August 17, 2000.

              (c)  When Borrower desires to obtain an Equipment Advance,
    Borrower shall notify Bank (which notice shall be irrevocable) by facsimile
    transmission received no later than 3:00 p.m. California time one (1)
    Business Day before the day on which the Equipment Advance is to be made. 
    Such notice shall be in substantially the form of EXHIBIT B.  The notice
    shall be signed by a Responsible Officer and include a list of the
    Equipment to be financed and evidence satisfactory to Bank of the book
    value of such Equipment.

              (d)  The Equipment Advance shall be deemed an "Advance" for the 
purpose of calculating availability under Sections 2.1 and 2.2 until Bank 
receives evidence satisfactory to Bank that Borrower has achieved a Debt 
Service Coverage of not less than 2.00 to 1.00 for two consecutive fiscal 
quarters. 

    4.   Sections 6.8, 6.9, 6.10 and 6.11 are amended, and Section 6.14 is 
added, as follows:

                                       1
<PAGE>

         6.8  QUICK RATIO.  Borrower shall maintain, as of the last day of each
    calendar month, a ratio of Quick Assets to Current Liabilities of at least
    1.75 to 1.00.

         6.9  DEBT-TANGIBLE NET WORTH RATIO.  Borrower shall maintain, as of
    the last day of each calendar month, a ratio of Total Liabilities less
    Subordinated Debt to Tangible Net Worth plus Subordinated Debt of not more
    than 0.75 to 1.00.

         6.10 TANGIBLE NET WORTH.  Borrower shall maintain, as of the last day
    of each calendar month, a Tangible Net Worth plus Subordinated Debt of not
    less than Three Million Dollars ($3,000,000).

         6.11 PROFITABILITY.  Beginning September 30, 1997, Borrower shall be
    profitable for each fiscal quarter.

         6.14 DEBT SERVICE COVERAGE.  Beginning September 30, 1997, Borrower
    shall maintain, as of the last day of each calendar month, Debt Service
    Coverage of at least 2.00 to 1.00. "Debt Service Coverage" means net income
    plus depreciation and amortization, annualized for the preceding three
    month period, divided by the current portion of total long term debt.
    
    5.   The Compliance Certificate to be delivered after the date of this 
Amendment shall be in substantially the form of EXHIBIT D hereto.

    6.   Unless otherwise defined, all capitalized terms in this Amendment 
shall be as defined in the Agreement.  Except as amended, the Agreement 
remains in full force and effect.

    7.   Borrower represents and warrants that the Representations and 
Warranties contained in the Agreement are true and correct as of the date of 
this Amendment, and that no Event of Default has occurred and is continuing.

    8.   This Amendment may be executed in two or more counterparts, each of 
which shall be deemed an original, but all of which together shall constitute 
one instrument.

    9.   As a condition to the effectiveness of this Amendment, Borrower 
shall pay a Facility Fee in an amount equal to Seven Thousand Five Hundred 
Dollars ($7,500), payable upon the date hereof, plus all Bank Expenses 
incurred in connection with the preparation of this Amendment.



                                       2
<PAGE>

     IN WITNESS WHEREOF, the undersigned have executed this Amendment as of 
the first date above written.


                                    QUALMARK CORPORATION


                                    By: /s/ Vernon W. Settle
                                        --------------------------------------
                                    Title: Vice President - Administration
                                           -----------------------------------



                                    SILICON VALLEY BANK


                                    By: /s/ Andrew Enroth
                                        --------------------------------------
                                    Title: AVP
                                           -----------------------------------


                                       3

<PAGE>

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

                             QUALMARK CORPORATION


                         LOAN AND SECURITY AGREEMENT

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









<PAGE>

                              TABLE OF CONTENTS

                                                                           PAGE
                                                                           ----

1.  DEFINITIONS AND CONSTRUCTION . . . . . . . . . . . . . . . . . . . . . .  1
    1.1  Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1
    1.2  Accounting Terms. . . . . . . . . . . . . . . . . . . . . . . . . .  6

2.  LOAN AND TERMS OF PAYMENT. . . . . . . . . . . . . . . . . . . . . . . .  6
    2.1  Advances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  6
    2.2  Overadvances. . . . . . . . . . . . . . . . . . . . . . . . . . . .  7
    2.3  Interest Rates, Payments, and Calculations. . . . . . . . . . . . .  7
    2.4  Crediting Payments. . . . . . . . . . . . . . . . . . . . . . . . .  7
    2.5  Fees. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
    2.6  Additional Costs. . . . . . . . . . . . . . . . . . . . . . . . . .  8
    2.7  Term. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9

3.  CONDITIONS OF LOANS. . . . . . . . . . . . . . . . . . . . . . . . . . .  9
    3.1  Conditions Precedent to Initial Advance . . . . . . . . . . . . . .  9
    3.2  Conditions Precedent to all Advances. . . . . . . . . . . . . . . .  9

4.  CREATION OF SECURITY INTEREST. . . . . . . . . . . . . . . . . . . . . .  9
    4.1  Grant of Security Interest. . . . . . . . . . . . . . . . . . . . .  9
    4.2  Delivery of Additional Documentation Required . . . . . . . . . . . 10
    4.3  Right to Inspect. . . . . . . . . . . . . . . . . . . . . . . . . . 10

5.  REPRESENTATIONS AND WARRANTIES . . . . . . . . . . . . . . . . . . . . . 10
    5.1  Due Organization and Qualification. . . . . . . . . . . . . . . . . 10
    5.2  Due Authorization; No Conflict. . . . . . . . . . . . . . . . . . . 10
    5.3  No Prior Encumbrances . . . . . . . . . . . . . . . . . . . . . . . 10
    5.4  Bona Fide Eligible Accounts . . . . . . . . . . . . . . . . . . . . 10
    5.5  Merchantable Inventory. . . . . . . . . . . . . . . . . . . . . . . 10
    5.6  Name; Location of Chief Executive Office. . . . . . . . . . . . . . 10
    5.7  Litigation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
    5.8  No Material Adverse Change in Financial Statements. . . . . . . . . 10
    5.9  Solvency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
    5.10 Regulatory Compliance . . . . . . . . . . . . . . . . . . . . . . . 11
    5.11 Environmental Condition . . . . . . . . . . . . . . . . . . . . . . 11
    5.12 Taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
    5.13 Subsidiaries. . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
    5.14 Government Consents . . . . . . . . . . . . . . . . . . . . . . . . 11
    5.15 Full Disclosure . . . . . . . . . . . . . . . . . . . . . . . . . . 11

6.  AFFIRMATIVE COVENANTS. . . . . . . . . . . . . . . . . . . . . . . . . . 11
    6.1  Good Standing . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
    6.2  Government Compliance . . . . . . . . . . . . . . . . . . . . . . . 12
    6.3  Financial Statements, Reports, Certificates . . . . . . . . . . . . 12
    6.4  Inventory; Returns. . . . . . . . . . . . . . . . . . . . . . . . . 12
    6.5  Taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
    6.6  Insurance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
    6.7  Principal Depository. . . . . . . . . . . . . . . . . . . . . . . . 13
    6.8  Quick Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
    6.9  Debt-Tangible Net Worth Ratio . . . . . . . . . . . . . . . . . . . 13
    6.10 Tangible Net Worth. . . . . . . . . . . . . . . . . . . . . . . . . 13
    6.11 Profitability . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

                                       i
<PAGE>

    6.12 Registration of Intellectual Property Rights. . . . . . . . . . . . 13
    6.13 Further Assurances. . . . . . . . . . . . . . . . . . . . . . . . . 14

7.  NEGATIVE COVENANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
    7.1  Dispositions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
    7.2  Change in Business. . . . . . . . . . . . . . . . . . . . . . . . . 14
    7.3  Mergers or Acquisitions . . . . . . . . . . . . . . . . . . . . . . 14
    7.4  Indebtedness. . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
    7.5  Encumbrances. . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
    7.6  Distributions . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
    7.7  Investments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
    7.8  Transactions with Affiliates. . . . . . . . . . . . . . . . . . . . 14
    7.9  Subordinated Debt . . . . . . . . . . . . . . . . . . . . . . . . . 15
    7.10 Inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
    7.11 Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

8.  EVENTS OF DEFAULT. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
    8.1  Payment Default . . . . . . . . . . . . . . . . . . . . . . . . . . 15
    8.2  Covenant Default. . . . . . . . . . . . . . . . . . . . . . . . . . 15
    8.3  Material Adverse Change . . . . . . . . . . . . . . . . . . . . . . 15
    8.4  Attachment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
    8.5  Insolvency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
    8.6  Other Agreements. . . . . . . . . . . . . . . . . . . . . . . . . . 16
    8.7  Subordinated Debt . . . . . . . . . . . . . . . . . . . . . . . . . 16
    8.8  Judgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
    8.9  Misrepresentations. . . . . . . . . . . . . . . . . . . . . . . . . 16

9.  BANK'S RIGHTS AND REMEDIES . . . . . . . . . . . . . . . . . . . . . . . 16
    9.1  Rights and Remedies . . . . . . . . . . . . . . . . . . . . . . . . 16
    9.2  Power of Attorney . . . . . . . . . . . . . . . . . . . . . . . . . 17
    9.3  Bank Expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
    9.4  Bank's Liability for Collateral . . . . . . . . . . . . . . . . . . 18
    9.5  Remedies Cumulative . . . . . . . . . . . . . . . . . . . . . . . . 18
    9.6  Demand; Protest . . . . . . . . . . . . . . . . . . . . . . . . . . 18

10. NOTICES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

11. CHOICE OF LAW AND VENUE; JURY TRIAL WAIVER . . . . . . . . . . . . . . . 19

12. GENERAL PROVISIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
    12.1 Successors and Assigns. . . . . . . . . . . . . . . . . . . . . . . 19
    12.2 Indemnification . . . . . . . . . . . . . . . . . . . . . . . . . . 19
    12.3 Time of Essence . . . . . . . . . . . . . . . . . . . . . . . . . . 19
    12.4 Severability of Provisions. . . . . . . . . . . . . . . . . . . . . 19
    12.5 Amendments in Writing, Integration. . . . . . . . . . . . . . . . . 19
    12.6 Counterparts. . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
    12.7 Survival. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
    12.8 Confidentiality . . . . . . . . . . . . . . . . . . . . . . . . . . 20

                                      ii
<PAGE>

    This LOAN AND SECURITY AGREEMENT is entered into as of April 30, 1996, by 
and between SILICON VALLEY BANK ("Bank") and QualMark Corporation 
("Borrower").

                                       
                                   RECITALS

    Borrower wishes to obtain credit from time to time from Bank, and Bank 
desires to extend credit to Borrower.  This Agreement sets forth the terms on 
which Bank will advance credit to Borrower, and Borrower will repay the 
amounts owing to Bank.


                                   AGREEMENT

    The parties agree as follows:

    1.   DEFINITIONS AND CONSTRUCTION

         1.   DEFINITIONS.  As used in this Agreement, the following terms 
shall have the following definitions:

              "Accounts" means all presently existing and hereafter arising 
accounts, contract rights, and all other forms of obligations owing to 
Borrower arising out of the sale or lease of goods (including, without 
limitation, the licensing of software and other technology) or the rendering 
of services by Borrower, whether or not earned by performance, and any and 
all credit insurance, guaranties, and other security therefor, as well as all 
merchandise returned to or reclaimed by Borrower and Borrower's Books 
relating to any of the foregoing.

              "Advance" or "Advances" means an Advance under the Revolving 
Facility.

              "Affiliate" means, with respect to any Person, any Person that 
owns or controls directly or indirectly such Person, any Person that controls 
or is controlled by or is under common control with such Person, and each of 
such Person's senior executive officers, directors, and partners.

              "Bank Expenses" means all:  reasonable costs or expenses 
(including reasonable attorneys' fees and expenses) incurred in connection 
with the preparation, negotiation, administration, and enforcement of the 
Loan Documents; and Bank's reasonable attorneys' fees and expenses incurred 
in amending, enforcing or defending the Loan Documents, whether or not suit 
is brought.

              "Borrower's Books" means all of Borrower's books and records 
including:  ledgers; records concerning Borrower's assets or liabilities, the 
Collateral, business operations or financial condition; and all computer 
programs, or tape files, and the equipment, containing such information.

              "Borrowing Base" has the meaning set forth in Section 2.1 
hereof.

              "Business Day" means any day that is not a Saturday, Sunday, or 
other day on which banks in the State of California are authorized or 
required to close.

              "Closing Date" means the date of this Agreement.

              "Code" means the California Uniform Commercial Code.

              "Collateral" means the property described on EXHIBIT A attached 
hereto.

              "Committed Line" means Two Hundred Fifty Thousand Dollars 
($250,000); provided the Committed Line shall be Seven Hundred Fifty Thousand 
Dollars ($750,000) if Borrower so elects after the payment to Bank of an 
additional fee of Two Thousand Five Hundred Dollars ($2,500).

                                       1
<PAGE>

              "Contingent Obligation" means, as applied to any Person, any 
direct or indirect liability, contingent or otherwise, of that Person with 
respect to (i) any indebtedness, lease, dividend, letter of credit or other 
obligation of another, including, without limitation, any such obligation 
directly or indirectly guaranteed, endorsed, co-made or discounted or sold 
with recourse by that Person, or in respect of which that Person is otherwise 
directly or indirectly liable; (ii) any obligations with respect to undrawn 
letters of credit issued for the account of that Person; and (iii) all 
obligations arising under any interest rate, currency or commodity swap 
agreement, interest rate cap agreement, interest rate collar agreement, or 
other agreement or arrangement designated to protect a Person against 
fluctuation in interest rates, currency exchange rates or commodity prices; 
provided, however, that the term "Contingent Obligation" shall not include 
endorsements for collection or deposit in the ordinary course of business.  
The amount of any Contingent Obligation shall be deemed to be an amount equal 
to the stated or determined amount of the primary obligation in respect of 
which such Contingent Obligation is made or, if not stated or determinable, 
the maximum reasonably anticipated liability in respect thereof as determined 
by such Person in good faith; provided, however, that such amount shall not 
in any event exceed the maximum amount of the obligations under the guarantee 
or other support arrangement.

              "Current Liabilities" means, as of any applicable date, all 
amounts that should, in accordance with GAAP, be included as current 
liabilities on the consolidated balance sheet of Borrower and its 
Subsidiaries, as at such date, plus, to the extent not already included 
therein, all outstanding Advances made under this Agreement, including all 
Indebtedness that is payable upon demand or within one year from the date of 
determination thereof unless such Indebtedness is renewable or extendable at 
the option of Borrower or any Subsidiary to a date more than one year from 
the date of determination, but excluding Subordinated Debt.

              "Daily Balance" means the amount of the Obligations owed at the 
end of a given day.

              "Eligible Accounts" means those Accounts that arise in the 
ordinary course of Borrower's business that comply with all of Borrower's 
representations and warranties to Bank set forth in Section 5.4; PROVIDED, 
that standards of eligibility may be fixed and revised from time to time by 
Bank in Bank's reasonable judgment and upon notification thereof to Borrower 
in accordance with the provisions hereof.  Unless otherwise agreed to by 
Bank, Eligible Accounts shall not include the following:

             (a)   Accounts that the account debtor has failed to pay within 
ninety (90) days of invoice date;

             (b)   Accounts with respect to an account debtor, fifty percent 
(50%) of whose Accounts the account debtor has failed to pay within ninety 
(90) days of invoice date;

             (c)   Accounts with respect to which the account debtor is an 
officer, employee, or agent of Borrower;

             (d)   Accounts with respect to which goods are placed on 
consignment, guaranteed sale, sale or return, sale on approval, bill and 
hold, or other terms by reason of which the payment by the account debtor may 
be conditional;

             (e)   Accounts with respect to which the account debtor is an 
Affiliate of Borrower;

             (f)   Accounts with respect to which the account debtor does not 
have its principal place of business in the United States, except for 
Eligible Foreign Accounts;

             (g)   Accounts with respect to which the account debtor is the 
United States or any department, agency, or instrumentality of the United 
States;

                                       2
<PAGE>

             (h)   Accounts with respect to which Borrower is liable to the 
account debtor for goods sold or services rendered by the account debtor to 
Borrower, but only to the extent of any amounts owing to the account debtor 
against amounts owed to Borrower;

             (i)   Accounts with respect to an account debtor, including 
Subsidiaries and Affiliates, whose total obligations to Borrower exceed 
twenty-five percent (25%) of all Accounts, to the extent such obligations 
exceed the aforementioned percentage, except as approved in writing by Bank;

             (j)   Accounts with respect to which the account debtor disputes 
liability or makes any claim with respect thereto as to which Bank believes, 
in its sole discretion, that there may be a basis for dispute (but only to 
the extent of the amount subject to such dispute or claim), or is subject to 
any Insolvency Proceeding, or becomes insolvent, or goes out of business;

             (k)   Deposits by customers; and

             (l)   Accounts the collection of which Bank reasonably 
determines to be doubtful.

              "Eligible Foreign Accounts" means Accounts with respect to 
which the account debtor does not have its principal place of business in the 
United States and that are:  (1) covered by credit insurance in form and 
amount, and by an insurer satisfactory to Bank less the amount of any 
deductible(s) which may be or become owing thereon; or (2) supported by one 
or more letters of credit in favor of Bank as beneficiary, in an amount and 
of a tenor, and issued by a financial institution, acceptable to Bank; or (3) 
that Bank approves on a case-by-case basis.

              "Equipment" means all present and future machinery, equipment, 
tenant improvements, furniture, fixtures, vehicles, tools, parts and 
attachments in which Borrower has any interest.

              "ERISA" means the Employment Retirement Income Security Act of 
1974, as amended, and the regulations thereunder.

              "GAAP" means generally accepted accounting principles as in 
effect from time to time.

              "Indebtedness" means (a) all indebtedness for borrowed money or 
the deferred purchase price of property or services, including without 
limitation reimbursement and other obligations with respect to surety bonds 
and letters of credit, (b) all obligations evidenced by notes, bonds, 
debentures or similar instruments, (c) all capital lease obligations and (d) 
all Contingent Obligations.

              "Insolvency Proceeding" means any proceeding commenced by or 
against any person or entity under any provision of the United States 
Bankruptcy Code, as amended, or under any other bankruptcy or insolvency law, 
including assignments for the benefit of creditors, formal or informal 
moratoria, compositions, extension generally with its creditors, or 
proceedings seeking reorganization, arrangement, or other relief.

              "Inventory" means all present and future inventory in which 
Borrower has any interest, including merchandise, raw materials, parts, 
supplies, packing and shipping materials, work in process and finished 
products intended for sale or lease or to be furnished under a contract of 
service, of every kind and description now or at any time hereafter owned by 
or in the custody or possession, actual or constructive, of Borrower, 
including such inventory as is temporarily out of its custody or possession 
or in transit and including any returns upon any accounts or other proceeds, 
including insurance proceeds, resulting from the sale or disposition of any 
of the foregoing and any documents of title representing any of the above, 
and Borrower's Books relating to any of the foregoing.

              "Investment" means any beneficial ownership of (including 
stock, partnership interest or other securities) any Person, or any loan, 
advance or capital contribution to any Person.

                                       3
<PAGE>

              "IRC" means the Internal Revenue Code of 1986, as amended, and 
the regulations thereunder.

              "Lien" means any mortgage, lien, deed of trust, charge, pledge, 
security interest or other encumbrance.

              "Loan Documents" means, collectively, this Agreement, any note 
or notes executed by Borrower, and any other agreement entered into between 
Borrower and Bank in connection with this Agreement, all as amended or 
extended from time to time.

              "Material Adverse Effect" means a material adverse effect on 
(i) the business operations or condition (financial or otherwise) of Borrower 
and its Subsidiaries taken as a whole or (ii) the ability of Borrower to 
repay the Obligations or otherwise perform its obligations under the Loan 
Documents.

              "Maturity Date" means April 29, 1997.

              "Negotiable Collateral" means all of Borrower's present and 
future letters of credit of which it is a beneficiary, notes, drafts, 
instruments, securities, documents of title, and chattel paper, and 
Borrower's Books relating to any of the foregoing.

              "Obligations" means all debt, principal, interest, Bank 
Expenses and other amounts owed to Bank by Borrower pursuant to this 
Agreement or any other agreement, whether absolute or contingent, due or to 
become due, now existing or hereafter arising, including any interest that 
accrues after the commencement of an Insolvency Proceeding and including any 
debt, liability, or obligation owing from Borrower to others that Bank may 
have obtained by assignment or otherwise.

              "Periodic Payments" means all installments or similar recurring 
payments that Borrower may now or hereafter become obligated to pay to Bank 
pursuant to the terms and provisions of any instrument, or agreement now or 
hereafter in existence between Borrower and Bank.

              "Permitted Indebtedness" means:

              (a)  Indebtedness of Borrower in favor of Bank arising under 
this Agreement or any other Loan Document;

              (b)  Indebtedness existing on the Closing Date and disclosed in 
the Schedule;

              (c)  Subordinated Debt; and

              (d)  Indebtedness to trade creditors incurred in the ordinary 
course of business.

              "Permitted Investment" means:

              (a)  Investments existing on the Closing Date disclosed in the 
Schedule; and

              (b)  (i)  marketable direct obligations issued or 
unconditionally guaranteed by the United States of America or any agency or 
any State thereof maturing within one (1) year from the date of acquisition 
thereof, (ii) commercial paper maturing no more than one (1) year from the 
date of creation thereof and currently having the highest rating obtainable 
from either Standard & Poor's Corporation or Moody's Investors Service, Inc., 
and (iii) certificates of deposit maturing no more than one (1) year from the 
date of investment therein issued by Bank.

              "Permitted Liens" means the following:

                                       4
<PAGE>

              (a)  Any Liens existing on the Closing Date and disclosed in 
the Schedule or arising under this Agreement or the other Loan Documents;

              (b)  Liens for taxes, fees, assessments or other governmental 
charges or levies, either not delinquent or being contested in good faith by 
appropriate proceedings, PROVIDED the same have no priority over any of 
Bank's security interests;

              (c)  Liens (i) upon or in any equipment acquired or held by 
Borrower or any of its Subsidiaries to secure the purchase price of such 
equipment or indebtedness incurred solely for the purpose of financing the 
acquisition of such equipment, or (ii) existing on such equipment at the time 
of its acquisition, PROVIDED that the Lien is confined solely to the property 
so acquired and improvements thereon, and the proceeds of such equipment;

              (d)  Liens incurred in connection with the extension, renewal 
or refinancing of the indebtedness secured by Liens of the type described in 
clauses (a) through (c) above, PROVIDED that any extension, renewal or 
replacement Lien shall be limited to the property encumbered by the existing 
Lien and the principal amount of the indebtedness being extended, renewed or 
refinanced does not increase.

              "Person" means any individual, sole proprietorship, 
partnership, limited liability company, joint venture, trust, unincorporated 
organization, association, corporation, institution, public benefit 
corporation, firm, joint stock company, estate, entity or governmental agency.

              "Prime Rate" means the variable rate of interest, per annum, 
most recently announced by Bank, as its "prime rate," whether or not such 
announced rate is the lowest rate available from Bank.

              "Quick Assets" means, at any date as of which the amount 
thereof shall be determined, the consolidated cash, cash-equivalents, 
accounts receivable and investments, with maturities not to exceed 90 days, 
of Borrower determined in accordance with GAAP.

              "Responsible Officer" means each of the Chief Executive 
Officer, the Chief Financial Officer and the Controller of Borrower.

              "Revolving Facility" means the facility under which Borrower 
may request Bank to issue cash advances, as specified in Section 2.1 hereof.

              "Schedule" means the schedule of exceptions attached hereto, if 
any.

              "Subordinated Debt" means any debt incurred by Borrower that is 
subordinated to the debt owing by Borrower to Bank on terms acceptable to 
Bank (and identified as being such by Borrower and Bank).

              "Subsidiary" means any corporation or partnership in which (i) 
any general partnership interest or (ii) more than 50% of the stock of which 
by the terms thereof ordinary voting power to elect the Board of Directors, 
managers or trustees of the entity shall, at the time as of which any 
determination is being made, be owned by Borrower, either directly or through 
an Affiliate.

              "Tangible Net Worth" means at any date as of which the amount 
thereof shall be determined, the consolidated total assets of Borrower and 
its Subsidiaries MINUS, without duplication, (i) the sum of any amounts 
attributable to (a) goodwill, (b) intangible items such as unamortized debt 
discount and expense, patents, trade and service marks and names, copyrights 
and research and development expenses except prepaid expenses, and (c) all 
reserves not already deducted from assets, AND (ii) Total Liabilities.

              "Total Liabilities" means at any date as of which the amount 
thereof shall be determined, all obligations that should, in accordance with 
GAAP be classified as liabilities on the consolidated balance sheet of 
Borrower, including in any event all Indebtedness, but specifically excluding 
Subordinated Debt.

                                       5
<PAGE>

         2.   ACCOUNTING TERMS.  All accounting terms not specifically 
defined herein shall be construed in accordance with GAAP and all 
calculations made hereunder shall be made in accordance with GAAP.  When used 
herein, the terms "financial statements" shall include the notes and 
schedules thereto.

    2.   LOAN AND TERMS OF PAYMENT

         2.1   ADVANCES.  Subject to and upon the terms and conditions of 
this Agreement, Bank agrees to make Advances to Borrower in an aggregate 
amount not to exceed the lesser of the Committed Line or the Borrowing Base.  
For purposes of this Agreement, "Borrowing Base" shall mean an amount equal 
to eighty percent (80%) of Eligible Accounts.  Subject to the terms and 
conditions of this Agreement, amounts borrowed pursuant to this Section 2.1 
may be repaid and reborrowed at any time during the term of this Agreement.

    Whenever Borrower desires an Advance, Borrower will notify Bank by 
facsimile transmission or telephone no later than 3:00 p.m. California time, 
on the Business Day that the Advance is to be made.  Each such notification 
shall be promptly confirmed by a Payment/Advance Form in substantially the 
form of EXHIBIT B hereto.  Bank is authorized to make Advances under this 
Agreement, based upon instructions received from a Responsible Officer, or 
without instructions if in Bank's discretion such Advances are necessary to 
meet Obligations which have become due and remain unpaid.  Bank shall be 
entitled to rely on any telephonic notice given by a person who Bank 
reasonably believes to be a Responsible Officer, and Borrower shall indemnify 
and hold Bank harmless for any damages or loss suffered by Bank as a result 
of such reliance.  Bank will credit the amount of Advances made under this 
Section 2.1 to Borrower's deposit account.  

    The Revolving Facility shall terminate on the Maturity Date, at which 
time all Advances under this Section 2.1 and other amounts due under this 
Agreement shall be immediately due and payable.

              2.1.1     ACCOUNTS COLLECTION.  At any time from the date of 
this Agreement, Bank may notify any person or entity owing funds to Borrower 
of Bank's security interest in such funds.  Borrower shall open and maintain 
with Bank an account (the "Collateral Account") into which all funds received 
by Borrower from any source shall immediately be deposited.  Borrower shall 
direct all account debtors to mail or deliver all checks or other forms of 
payment for amounts owing to Borrower to a post office box designated by 
Bank, over which Bank shall have exclusive and unrestricted access.  Bank 
shall collect the mail delivered to such post office box, open such mail, and 
endorse and credit all items to the Collateral Account.  Borrower shall 
direct all account debtors or other persons owing money to Borrower who make 
payments by electronic transfer of funds to wire such funds directly to the 
Collateral Account.  Borrower shall hold in trust for Bank all amounts that 
Borrower receives despite the directions to make payments to the post office 
box or Collateral Account, and immediately deliver such payments to Bank in 
their original form as received from the account debtor, with proper 
endorsements for deposit into the Collateral Account.  Borrower irrevocably 
authorizes Bank to transfer to the Collateral Account any funds that have 
been deposited into any other accounts or that Bank has otherwise received.  
Borrower shall not establish or maintain any accounts with any Person other 
than Bank except for accounts opened in the ordinary course of business from 
which all funds are transferred on a daily basis to the Collateral Account.  
Bank shall have all right, title and interest in all of the items from time 
to time in the Collateral Account and their proceeds.  Neither Borrower nor 
any person claiming through Borrower shall have any right in or control over 
the use of, or any right to withdraw any amount from, the Collateral Account, 
which shall be under the sole control of Bank.  Borrower shall enter into 
such lockbox agreements as Bank may reasonably request from time to time.

         2.2   OVERADVANCES.  If, at any time or for any reason, the amount 
of Obligations owed by Borrower to Bank pursuant to Section 2.1 of this 
Agreement is greater than the lesser of (i) the Committed Line or (ii) the 
Borrowing Base, Borrower shall immediately pay to Bank, in cash, the amount 
of such excess.

         2.3   INTEREST RATES, PAYMENTS, AND CALCULATIONS.

             (a)   INTEREST RATE.  Except as set forth in Section 2.3(b), any 
Advances shall bear interest, on the average Daily Balance, at a rate equal 
to one and one-half (1.5) percentage points above the Prime Rate.

                                       6
<PAGE>

             (b)   DEFAULT RATE.  All Obligations shall bear interest, from 
and after the occurrence of an Event of Default, at a rate equal to five (5) 
percentage points above the interest rate applicable immediately prior to the 
occurrence of the Event of Default.

             (c)   PAYMENTS.  Interest hereunder shall be due and payable on 
the last calendar day of each month during the term hereof.  Bank shall, at 
its option, charge such interest, all Bank Expenses, and all Periodic 
Payments against any of Borrower's deposit accounts or against the Committed 
Line, in which case those amounts shall thereafter accrue interest at the 
rate then applicable hereunder.  Any interest not paid when due shall be 
compounded by becoming a part of the Obligations, and such interest shall 
thereafter accrue interest at the rate then applicable hereunder.

             (d)   COMPUTATION.  In the event the Prime Rate is changed from 
time to time hereafter, the applicable rate of interest hereunder shall be 
increased or decreased effective as of 12:01 a.m. on the day the Prime Rate 
is changed, by an amount equal to such change in the Prime Rate.  All 
interest chargeable under the Loan Documents shall be computed on the basis 
of a three hundred sixty (360) day year for the actual number of days elapsed.

         2.4   CREDITING PAYMENTS.  Prior to the occurrence of an Event of 
Default, Bank shall credit a wire transfer of funds, check or other item of 
payment to such deposit account or Obligation as Borrower specifies.  After 
the occurrence of an Event of Default, the receipt by Bank of any wire 
transfer of funds, check, or other item of payment shall be immediately 
applied to conditionally reduce Obligations, but shall not be considered a 
payment on account unless such payment is of immediately available federal 
funds or unless and until such check or other item of payment is honored when 
presented for payment.  Notwithstanding anything to the contrary contained 
herein, any wire transfer or payment received by Bank after 12:00 noon 
California time shall be deemed to have been received by Bank as of the 
opening of business on the immediately following Business Day.  Whenever any 
payment to Bank under the Loan Documents would otherwise be due (except by 
reason of acceleration) on a date that is not a Business Day, such payment 
shall instead be due on the next Business Day, and additional fees or 
interest, as the case may be, shall accrue and be payable for the period of 
such extension.

         2.5   FEES.  Borrower shall pay to Bank the following:

             (a)   FACILITY FEE.  A Facility Fee equal to Two Thousand Five 
Hundred Dollars ($2,500), which fee shall be due on the Closing Date and 
shall be fully earned and nonrefundable, and an additional fee of Two 
Thousand Five Hundred Dollars ($2,500) as a condition to increase the 
Committed Line to Seven Hundred Fifty Thousand Dollars ($750,000) if Borrower 
elects to increase the Committed Line;

             (b)   FINANCIAL EXAMINATION AND APPRAISAL FEES.  Bank's 
customary fees and out-of-pocket expenses for Bank's audits of Borrower's 
Accounts, and for each appraisal of Collateral and financial analysis and 
examination of Borrower performed from time to time by Bank or its agents;

             (c)   BANK EXPENSES.  Upon the date hereof, all Bank Expenses 
incurred through the Closing Date, including reasonable attorneys' fees and 
expenses, and, after the date hereof, all Bank Expenses, including reasonable 
attorneys' fees and expenses, as and when they become due.

         2.6   ADDITIONAL COSTS.  In case any change in any law, regulation, 
treaty or official directive or the interpretation or application thereof by 
any court or any governmental authority charged with the administration 
thereof or the compliance with any guideline or request of any central bank 
or other governmental authority (whether or not having the force of law), in 
each case after the date of this Agreement:

             (a)   subjects Bank to any tax with respect to payments of 
principal or interest or any other amounts payable hereunder by Borrower or 
otherwise with respect to the transactions contemplated hereby (except for 
taxes on the overall net income of Bank imposed by the United States of 
America or any political subdivision thereof);

                                       7
<PAGE>

             (b)   imposes, modifies or deems applicable any deposit 
insurance, reserve, special deposit or similar requirement against assets 
held by, or deposits in or for the account of, or loans by, Bank; or

             (c)   imposes upon Bank any other condition with respect to its 
performance under this Agreement,

and the result of any of the foregoing is to increase the cost to Bank, 
reduce the income receivable by Bank or impose any expense upon Bank with 
respect to any loans under this Agreement, Bank shall notify Borrower 
thereof.  Borrower agrees to pay to Bank the amount of such increase in cost, 
reduction in income or additional expense as and when such cost, reduction or 
expense is incurred or determined, upon presentation by Bank of a statement 
of the amount and setting forth Bank's calculation thereof, all in reasonable 
detail, which statement shall be deemed true and correct absent manifest 
error.

         2.7   TERM.  This Agreement shall become effective on the Closing 
Date and, subject to Section 12.7, shall continue in full force and effect 
for a term ending on the Maturity Date.  Notwithstanding the foregoing, Bank 
shall have the right to terminate its obligation to make Advances under this 
Agreement immediately and without notice upon the occurrence and during the 
continuance of an Event of Default.  Notwithstanding termination, Bank's Lien 
on the Collateral shall remain in effect for so long as any Obligations are 
outstanding.

    3.   CONDITIONS OF LOANS

         3.1   CONDITIONS PRECEDENT TO INITIAL ADVANCE.  The obligation of 
Bank to make the initial Advance is subject to the condition precedent that 
Bank shall have received, in form and substance satisfactory to Bank, the 
following:

             (a)   this Agreement;

             (b)   a certificate of the Secretary of Borrower with respect to 
incumbency and resolutions authorizing the execution and delivery of this 
Agreement;

             (c)   a collateral assignment and patent mortgage;

             (d)   financing statements (Forms UCC-1);

             (e)   insurance certificate;

             (f)   an accounts receivable audit;

             (g)   payment of the fees and Bank Expenses then due specified 
in Section 2.5 hereof; and

             (h)   such other documents, and completion of such other 
matters, as Bank may reasonably deem necessary or appropriate.

         3.2   CONDITIONS PRECEDENT TO ALL ADVANCES.  The obligation of Bank 
to make each Advance, including the initial Advance, is further subject to 
the following conditions:

             (a)   timely receipt by Bank of the Payment/Advance Form as 
provided in Section 2.1; and

             (b)   the representations and warranties contained in Section 5 
shall be true and correct in all material respects on and as of the date of 
such Payment/Advance Form and on the effective date of each Advance as though 
made at and as of each such date, and no Event of Default shall have occurred 
and be continuing, or would result from such Advance.  The making of each 
Advance shall be deemed to be a 

                                       8
<PAGE>

representation and warranty by Borrower on the date of such Advance as to the 
accuracy of the facts referred to in this Section 3.2(b).

    4.   CREATION OF SECURITY INTEREST

         4.1   GRANT OF SECURITY INTEREST.  Borrower grants and pledges to 
Bank a continuing security interest in all presently existing and hereafter 
acquired or arising Collateral in order to secure prompt repayment of any and 
all Obligations and in order to secure prompt performance by Borrower of each 
of its covenants and duties under the Loan Documents.  Except as set forth in 
the Schedule, such security interest constitutes a valid, first priority 
security interest in the presently existing Collateral, and will constitute a 
valid, first priority security interest in Collateral acquired after the date 
hereof.

         4.2   DELIVERY OF ADDITIONAL DOCUMENTATION REQUIRED.  Borrower shall 
from time to time execute and deliver to Bank, at the request of Bank, all 
Negotiable Collateral, all financing statements and other documents that Bank 
may reasonably request, in form satisfactory to Bank, to perfect and continue 
perfected Bank's security interests in the Collateral and in order to fully 
consummate all of the transactions contemplated under the Loan Documents.

         4.3   RIGHT TO INSPECT.  Bank (through any of its officers, 
employees, or agents) shall have the right, upon reasonable prior notice, 
from time to time during Borrower's usual business hours, to inspect 
Borrower's Books and to make copies thereof and to check, test, and appraise 
the Collateral in order to verify Borrower's financial condition or the 
amount, condition of, or any other matter relating to, the Collateral.

    5.   REPRESENTATIONS AND WARRANTIES

         Borrower represents and warrants as follows: 

         5.1   DUE ORGANIZATION AND QUALIFICATION.  Borrower and each 
Subsidiary is a corporation duly existing and in good standing under the laws 
of its state of incorporation and qualified and licensed to do business in, 
and is in good standing in, any state in which the conduct of its business or 
its ownership of property requires that it be so qualified.

         5.2   DUE AUTHORIZATION; NO CONFLICT.  The execution, delivery, and 
performance of the Loan Documents are within Borrower's powers, have been 
duly authorized, and are not in conflict with nor constitute a breach of any 
provision contained in Borrower's Articles of Incorporation or Bylaws, nor 
will they constitute an event of default under any material agreement to 
which Borrower is a party or by which Borrower is bound.  Borrower is not in 
default under any agreement to which it is a party or by which it is bound, 
which default could have a Material Adverse Effect.

         5.3   NO PRIOR ENCUMBRANCES.  Borrower has good and indefeasible 
title to the Collateral, free and clear of Liens, except for Permitted Liens.

         5.4   BONA FIDE ELIGIBLE ACCOUNTS.  The Eligible Accounts are bona 
fide existing obligations.  The property giving rise to such Eligible 
Accounts has been delivered to the account debtor or to the account debtor's 
agent for immediate shipment to and unconditional acceptance by the account 
debtor. Borrower has not received notice of actual or imminent Insolvency 
Proceeding of any account debtor that is included in any Borrowing Base 
Certificate as an Eligible Account.

         5.5   MERCHANTABLE INVENTORY.  All Inventory is in all material 
respects of good and marketable quality, free from all material defects.  

         5.6   NAME; LOCATION OF CHIEF EXECUTIVE OFFICE.  Except as disclosed 
in the Schedule, Borrower has not done business under any name other than 
that specified on the signature page hereof.  The chief executive office of 
Borrower is located at the address indicated in Section 10 hereof.

                                       9
<PAGE>

         5.7   LITIGATION.  Except as set forth in the Schedule, there are no 
actions or proceedings pending by or against Borrower or any Subsidiary 
before any court or administrative agency in which an adverse decision could 
have a Material Adverse Effect or a material adverse effect on Borrower's 
interest or Bank's security interest in the Collateral.  Borrower does not 
have knowledge of any such pending or threatened actions or proceedings.

         5.8   NO MATERIAL ADVERSE CHANGE IN FINANCIAL STATEMENTS.  All 
consolidated financial statements related to Borrower and any Subsidiary that 
have been delivered by Borrower to Bank fairly present in all material 
respects Borrower's consolidated financial condition as of the date thereof 
and Borrower's consolidated results of operations for the period then ended.  
There has not been a material adverse change in the consolidated financial 
condition of Borrower since the date of the most recent of such financial 
statements submitted to Bank.

         5.9   SOLVENCY.  Borrower is solvent and able to pay its debts 
(including trade debts) as they mature.

         5.10  REGULATORY COMPLIANCE.  Borrower and each Subsidiary has met 
the minimum funding requirements of ERISA with respect to any employee 
benefit plans subject to ERISA.  No event has occurred resulting from 
Borrower's failure to comply with ERISA that is reasonably likely to result 
in Borrower's incurring any liability that could have a Material Adverse 
Effect.  Borrower is not an "investment company" or a company "controlled" by 
an "investment company" within the meaning of the Investment Company Act of 
1940.  Borrower is not engaged principally, or as one of the important 
activities, in the business of extending credit for the purpose of purchasing 
or carrying margin stock (within the meaning of Regulations G, T and U of the 
Board of Governors of the Federal Reserve System).  Borrower has complied 
with all the provisions of the Federal Fair Labor Standards Act.  Borrower 
has not violated any statutes, laws, ordinances or rules applicable to it, 
violation of which could have a Material Adverse Effect.

         5.11  ENVIRONMENTAL CONDITION.  None of Borrower's or any 
Subsidiary's properties or assets has ever been used by Borrower or any 
Subsidiary or, to the best of Borrower's knowledge, by previous owners or 
operators, in the disposal of, or to produce, store, handle, treat, release, 
or transport, any hazardous waste or hazardous substance other than in 
accordance with applicable law; to the best of Borrower's knowledge, none of 
Borrower's properties or assets has ever been designated or identified in any 
manner pursuant to any environmental protection statute as a hazardous waste 
or hazardous substance disposal site, or a candidate for closure pursuant to 
any environmental protection statute; no lien arising under any environmental 
protection statute has attached to any revenues or to any real or personal 
property owned by Borrower or any Subsidiary; and neither Borrower nor any 
Subsidiary has received a summons, citation, notice, or directive from the 
Environmental Protection Agency or any other federal, state or other 
governmental agency concerning any action or omission by Borrower or any 
Subsidiary resulting in the releasing, or otherwise disposing of hazardous 
waste or hazardous substances into the environment.  

         5.12  TAXES.  Borrower and each Subsidiary has filed or caused to be 
filed all tax returns required to be filed, and has paid, or has made 
adequate provision for the payment of, all taxes reflected therein.

         5.13  SUBSIDIARIES.  Borrower does not own any stock, partnership 
interest or other equity securities of any Person, except for Permitted 
Investments.

         5.14  GOVERNMENT CONSENTS.  Borrower and each Subsidiary has 
obtained all consents, approvals and authorizations of, made all declarations 
or filings with, and given all notices to, all governmental authorities that 
are necessary for the continued operation of Borrower's business as currently 
conducted.  

         5.15  FULL DISCLOSURE.  No representation, warranty or other 
statement made by Borrower in any certificate or written statement furnished 
to Bank contains any untrue statement of a material fact or omits to state a 
material fact necessary in order to make the statements contained in  such 
certificates or statements not misleading.

                                      10
<PAGE>

    6.   AFFIRMATIVE COVENANTS

         Borrower covenants and agrees that, until payment in full of all 
outstanding Obligations, and for so long as Bank may have any commitment to 
make an Advance hereunder, Borrower shall do all of the following:

         6.1   GOOD STANDING.  Borrower shall maintain its and each of its 
Subsidiaries' corporate existence and good standing in its jurisdiction of 
incorporation and maintain qualification in each jurisdiction in which the 
failure to so qualify could have a Material Adverse Effect.  Borrower shall 
maintain, and shall cause each of its Subsidiaries to maintain, to the extent 
consistent with prudent management of Borrower's business, in force all 
licenses, approvals and agreements, the loss of which could have a Material 
Adverse Effect.

         6.2   GOVERNMENT COMPLIANCE.  Borrower shall meet, and shall cause 
each Subsidiary to meet, the minimum funding requirements of ERISA with 
respect to any employee benefit plans subject to ERISA.  Borrower shall 
comply, and shall cause each Subsidiary to comply, with all statutes, laws, 
ordinances and government rules and regulations to which it is subject, 
noncompliance with which could have a Material Adverse Effect or a material 
adverse effect on the Collateral or the priority of Bank's Lien on the 
Collateral.

         6.3   FINANCIAL STATEMENTS, REPORTS, CERTIFICATES.  Borrower shall 
deliver to Bank:  (a) as soon as available, but in any event within thirty 
(30) days after the end of each month, a company prepared consolidated 
balance sheet and income statement covering Borrower's consolidated 
operations during such period, certified by a Responsible Officer; (b) as 
soon as available, but in any event within ninety (90) days after the end of 
Borrower's fiscal year, audited consolidated financial statements of Borrower 
prepared in accordance with GAAP, consistently applied, together with an 
unqualified opinion on such financial statements of an independent certified 
public accounting firm reasonably acceptable to Bank; (c) as soon as 
available the audited consolidated financial statements of Borrower for 
fiscal year 1994, with no changes from the draft financial statements 
delivered to Bank; (d) within five (5) days upon becoming available, copies 
of all statements, reports and notices sent or made available generally by 
Borrower to its security holders or to any holders of Subordinated Debt and 
all reports on Form 10-K and 10-Q filed with the Securities and Exchange 
Commission; (e) promptly upon receipt of notice thereof, a report of any 
legal actions pending or threatened against Borrower or any Subsidiary that 
could result in damages or costs to Borrower or any Subsidiary of One Hundred 
Thousand Dollars ($100,000) or more; and (f) such budgets, sales projections, 
operating plans or other financial information as Bank may reasonably request 
from time to time.

    Within fifteen (15) days after the last day of each month, Borrower shall 
deliver to Bank a Borrowing Base Certificate signed by a Responsible Officer 
in substantially the form of EXHIBIT C, together with aged listings of 
accounts receivable.

    Within fifteen (15) days after the last day of each month, Borrower shall 
deliver to Bank aged listings of accounts payable.

    Borrower shall deliver to Bank with the monthly financial statements a 
Compliance Certificate signed by a Responsible Officer in substantially the 
form of EXHIBIT D hereto.

    Bank shall have a right from time to time hereafter to audit Borrower's 
Accounts at Borrower's expense, provided that such audits will be conducted 
no more often than every six (6) months unless an Event of Default has 
occurred and is continuing.

         6.4   INVENTORY; RETURNS.  Borrower shall keep all Inventory in good 
and marketable condition, free from all material defects.  Returns and 
allowances, if any, as between Borrower and its account debtors shall be on 
the same basis and in accordance with the usual customary practices of 
Borrower, as they exist at the time of the execution and delivery of this 
Agreement. Borrower shall promptly notify Bank of all returns and recoveries 
and of all disputes and claims, where the return, recovery, dispute or claim 
involves more than Fifty Thousand Dollars ($50,000).

                                      11
<PAGE>

         6.5   TAXES.  Borrower shall make, and shall cause each Subsidiary 
to make, due and timely payment or deposit of all material federal, state, 
and local taxes, assessments, or contributions required of it by law, and 
will execute and deliver to Bank, on demand, appropriate certificates 
attesting to the payment or deposit thereof; and Borrower will make, and will 
cause each Subsidiary to make, timely payment or deposit of all material tax 
payments and withholding taxes required of it by applicable laws, including, 
but not limited to, those laws concerning F.I.C.A., F.U.T.A., state 
disability, and local, state, and federal income taxes, and will, upon 
request, furnish Bank with proof satisfactory to Bank indicating that 
Borrower or a Subsidiary has made such payments or deposits; provided that 
Borrower or a Subsidiary need not make any payment if the amount or validity 
of such payment is contested in good faith by appropriate proceedings and is 
reserved against (to the extent required by GAAP) by Borrower.

         6.6   INSURANCE.

             (a)   Borrower, at its expense, shall keep the Collateral 
insured against loss or damage by fire, theft, explosion, sprinklers, and all 
other hazards and risks, and in such amounts, as ordinarily insured against 
by other owners in similar businesses conducted in the locations where 
Borrower's business is conducted on the date hereof.  Borrower shall also 
maintain insurance relating to Borrower's ownership and use of the Collateral 
in amounts and of a type that are customary to businesses similar to 
Borrower's.

             (b)   All such policies of insurance shall be in such form, with 
such companies, and in such amounts as reasonably satisfactory to Bank.  All 
such policies of property insurance shall contain a lender's loss payable 
endorsement, in a form satisfactory to Bank, showing Bank as an additional 
loss payee thereof and all liability insurance policies shall show the Bank 
as an additional insured, and shall specify that the insurer must give at 
least twenty (20) days notice to Bank before canceling its policy for any 
reason.  Upon Bank's request, Borrower shall deliver to Bank certified copies 
of such policies of insurance and evidence of the payments of all premiums 
therefor.  All proceeds payable under any such policy shall, at the option of 
Bank, be payable to Bank to be applied on account of the Obligations.

         6.7   PRINCIPAL DEPOSITORY.  Borrower shall maintain its principal 
depository and operating accounts with Bank.

         6.8   QUICK RATIO.  Beginning December 31, 1995, Borrower shall 
maintain, as of the last day of each calendar quarter, a ratio of Quick 
Assets to Current Liabilities of at least 1.5 to 1.0.

         6.9   DEBT-TANGIBLE NET WORTH RATIO.  Beginning December 31, 1995, 
Borrower shall maintain, as of the last day of each calendar quarter, a ratio 
of Total Liabilities less Subordinated Debt to Tangible Net Worth plus 
Subordinated Debt of not more than 1.0 to 1.0.

         6.10  TANGIBLE NET WORTH.  Beginning December 31, 1995, Borrower 
shall maintain, as of the last day of each calendar month, a Tangible Net 
Worth plus Subordinated Debt of not less than Nine Hundred Thousand Dollars 
($900,000), plus Seventy-Five Percent (75%) of the proceeds of the sale by 
Borrower after the date hereof of its equity securities.

         6.11  PROFITABILITY.  Beginning December 31, 1995, Borrower (i) may 
not suffer a loss in any two consecutive quarters, (ii) may not suffer a loss 
of more than Two Hundred Thousand Dollars ($200,000) in any single fiscal 
quarter, and (iii) subject to clauses (i) and (ii), shall be profitable for 
each fiscal quarter.

         6.12  REGISTRATION OF INTELLECTUAL PROPERTY RIGHTS.  Borrower has 
registered or applied for registration with the United States Patent and 
Trademark Office or the United States Copyright Office, as applicable, those 
intellectual property rights so identified and listed on Exhibits A, B and C 
to the Collateral Assignment, Patent Mortgage and Security Agreement 
delivered to Bank by Borrower in connection with this Agreement within thirty 
(30) days of the date of this Agreement.  Borrower shall register or make 
application for registration with the United States Patent and Trademark 
Office or the United States Copyright Office, as applicable, those additional 
intellectual property rights developed or acquired by Borrower from time to 
time in connection with any product prior to the sale or licensing of such 
product to any third party, to the extent such 

                                      12
<PAGE>

intellectual property rights as are reasonably deemed by Borrower to be 
material to its business, including without limitation revisions or additions 
to the intellectual property rights listed on such Exhibits A, B and C.  
Borrower shall execute and deliver such additional instruments and documents 
from time to time as Bank shall reasonably request to perfect Bank's security 
interest in such additional intellectual property rights.

         6.13  FURTHER ASSURANCES.  At any time and from time to time 
Borrower shall execute and deliver such further instruments and take such 
further action as may reasonably be requested by Bank to effect the purposes 
of this Agreement.

    7.   NEGATIVE COVENANTS

         Borrower covenants and agrees that, so long as any credit hereunder 
shall be available and until payment in full of the outstanding Obligations 
or for so long as Bank may have any commitment to make any Advances, Borrower 
will not do any of the following:

         7.1   DISPOSITIONS.  Convey, sell, lease, transfer or otherwise 
dispose of (collectively, a "Transfer"), or permit any of its Subsidiaries to 
Transfer, all or any part of its business or property, other than: (i) 
Transfers of Inventory in the ordinary course of business; (ii) Transfers of 
non-exclusive licenses and similar arrangements for the use of the property 
of Borrower or its Subsidiaries; or (iii) Transfers of worn-out or obsolete 
Equipment.

         7.2   CHANGE IN BUSINESS.  Engage in any business, or permit any of 
its Subsidiaries to engage in any business, other than the businesses 
currently engaged in by Borrower and any business substantially similar or 
related thereto (or incidental thereto), or suffer a material change in 
Borrower's ownership. Borrower will not, without thirty (30) days prior 
written notification to Bank, relocate its chief executive office.

         7.3   MERGERS OR ACQUISITIONS.  Merge or consolidate, or permit any 
of its Subsidiaries to merge or consolidate, with or into any other business 
organization, or acquire, or permit any of its Subsidiaries to acquire, all 
or substantially all of the capital stock or property of another Person.

         7.4   INDEBTEDNESS.  Create, incur, assume or be or remain liable 
with respect to any Indebtedness, or permit any Subsidiary so to do, other 
than Permitted Indebtedness.

         7.5   ENCUMBRANCES.  Create, incur, assume or suffer to exist any 
Lien with respect to any of its property, or assign or otherwise convey any 
right to receive income, including the sale of any Accounts, or permit any of 
its Subsidiaries so to do, except for Permitted Liens.

         7.6   DISTRIBUTIONS.  Pay any dividends or make any other 
distribution or payment on account of or in redemption, retirement or 
purchase of any capital stock.

         7.7   INVESTMENTS.  Directly or indirectly acquire or own, or make 
any Investment in or to any Person, or permit any of its Subsidiaries so to 
do, other than Permitted Investments.

         7.8   TRANSACTIONS WITH AFFILIATES.  Directly or indirectly enter 
into or permit to exist any material transaction with any Affiliate of 
Borrower except for transactions that are in the ordinary course of 
Borrower's business, upon fair and reasonable terms that are no less 
favorable to Borrower than would be obtained in an arm's length transaction 
with a nonaffiliated Person.

         7.9   SUBORDINATED DEBT.  Make any payment in respect of any 
Subordinated Debt, or permit any of its Subsidiaries to make any such 
payment, except in compliance with the terms of such Subordinated Debt, or 
amend any provision contained in any documentation relating to the 
Subordinated Debt without Bank's prior written consent.

         7.10  INVENTORY.  Store the Inventory with a bailee, warehouseman, 
or similar party unless Bank has received a pledge of the warehouse receipt 
covering such Inventory.  Except for Inventory sold in the 

                                      13
<PAGE>

ordinary course of business and except for such other locations as Bank may 
approve in writing, Borrower shall keep the Inventory only at the location 
set forth in Section 10 hereof and such other locations of which Borrower 
gives Bank prior written notice and as to which Borrower signs and files a 
financing statement where needed to perfect Bank's security interest.

         7.11  COMPLIANCE.  Become an "investment company" controlled by an 
"investment company," within the meaning of the Investment Company Act of 
1940, or become principally engaged in, or undertake as one of its important 
activities, the business of extending credit for the purpose of purchasing or 
carrying margin stock, or use the proceeds of any Advance for such purpose. 
Fail to meet the minimum funding requirements of ERISA, permit a Reportable 
Event or Prohibited Transaction, as defined in ERISA, to occur, fail to 
comply with the Federal Fair Labor Standards Act or violate any law or 
regulation, which violation could have a Material Adverse Effect or a 
material adverse effect on the Collateral or the priority of Bank's Lien on 
the Collateral, or permit any of its Subsidiaries to do any of the foregoing.

    8.   EVENTS OF DEFAULT

         Any one or more of the following events shall constitute an Event of 
Default by Borrower under this Agreement:

         8.1   PAYMENT DEFAULT.  If Borrower fails to pay the principal of, 
or any interest on, any Advances when due and payable; or fails to pay any 
portion of any other Obligations not constituting such principal or interest, 
including without limitation Bank Expenses, within thirty (30) days of 
receipt by Borrower of an invoice for such other Obligations;

         8.2   COVENANT DEFAULT.  If Borrower fails to perform any obligation 
under Sections 6.7, 6.8, 6.9, 6.10 or 6.11 or violates any of the covenants 
contained in Article 7 of this Agreement, or fails or neglects to perform, 
keep, or observe any other material term, provision, condition, covenant, or 
agreement contained in this Agreement, in any of the Loan Documents, or in 
any other present or future agreement between Borrower and Bank and as to any 
default under such other term, provision, condition, covenant or agreement 
that can be cured, has failed to cure such default within ten (10) days after 
Borrower receives notice thereof or any officer of Borrower becomes aware 
thereof; provided, however, that if the default cannot by its nature be cured 
within the ten (10) day period or cannot after diligent attempts by Borrower 
be cured within such ten (10) day period, and such default is likely to be 
cured within a reasonable time, then Borrower shall have an additional 
reasonable period (which shall not in any case exceed thirty (30) days) to 
attempt to cure such default, and within such reasonable time period the 
failure to have cured such default shall not be deemed an Event of Default 
(provided that no Advances will be required to be made during such cure 
period);

         8.3   MATERIAL ADVERSE CHANGE.  If there occurs a material adverse 
change in Borrower's business or financial condition, or if there is a 
material impairment of the prospect of repayment of any portion of the 
Obligations or a material impairment of the value or priority of Bank's 
security interests in the Collateral;

         8.4   ATTACHMENT.  If any material portion of Borrower's assets is 
attached, seized, subjected to a writ or distress warrant, or is levied upon, 
or comes into the possession of any trustee, receiver or person acting in a 
similar capacity and such attachment, seizure, writ or distress warrant or 
levy has not been removed, discharged or rescinded within ten (10) days, or 
if Borrower is enjoined, restrained, or in any way prevented by court order 
from continuing to conduct all or any material part of its business affairs, 
or if a judgment or other claim becomes a lien or encumbrance upon any 
material portion of Borrower's assets, or if a notice of lien, levy, or 
assessment is filed of record with respect to any of Borrower's assets by the 
United States Government, or any department, agency, or instrumentality 
thereof, or by any state, county, municipal, or governmental agency, and the 
same is not paid within ten (10) days after Borrower receives notice thereof, 
provided that none of the foregoing shall constitute an Event of Default 
where such action or event is stayed or an adequate bond has been posted 
pending a good faith contest by Borrower (provided that no Advances will be 
required to be made during such cure period);

                                      14
<PAGE>

         8.5   INSOLVENCY.  If Borrower becomes insolvent, or if an Insolvency
Proceeding is commenced by Borrower, or if an Insolvency Proceeding is commenced
against Borrower and is not dismissed or stayed within ten (10) days (provided
that no Advances will be made prior to the dismissal of such Insolvency
Proceeding);

         8.6   OTHER AGREEMENTS.  If there is a default in any agreement to
which Borrower is a party with a third party or parties resulting in a right by
such third party or parties, whether or not exercised, to accelerate the
maturity of any Indebtedness in an amount in excess of One Hundred Thousand
Dollars ($100,000) or that could have a Material Adverse Effect;

         8.7   SUBORDINATED DEBT.  If Borrower makes any payment on account of
Subordinated Debt, except to the extent such payment is allowed under any
subordination agreement entered into with Bank;

         8.8   JUDGMENTS.  If a judgment or judgments for the payment of money
in an amount, individually or in the aggregate, of at least Fifty Thousand
Dollars ($50,000) shall be rendered against Borrower and shall remain
unsatisfied and unstayed for a period of ten (10) days (provided that no
Advances will be made prior to the satisfaction or stay of such judgment); or 

         8.9   MISREPRESENTATIONS.  If any material misrepresentation or
material misstatement exists now or hereafter in any warranty or representation
set forth herein or in any certificate delivered to Bank by any Responsible
Officer pursuant to this Agreement or to induce Bank to enter into this
Agreement or any other Loan Document.

    9.   BANK'S RIGHTS AND REMEDIES

         9.1   RIGHTS AND REMEDIES.  Upon the occurrence and during the
continuance of an Event of Default, Bank may, at its election, without notice of
its election and without demand, do any one or more of the following, all of
which are authorized by Borrower:

               (a)   Declare all Obligations, whether evidenced by this
Agreement, by any of the other Loan Documents, or otherwise, immediately due and
payable (provided that upon the occurrence of an Event of Default described in
Section 8.5 all Obligations shall become immediately due and payable without any
action by Bank);

               (b)   Cease advancing money or extending credit to or for the
benefit of Borrower under this Agreement or under any other agreement between
Borrower and Bank;

               (c)   Settle or adjust disputes and claims directly with account
debtors for amounts, upon terms and in whatever order that Bank reasonably
considers advisable;

               (d)   Without notice to or demand upon Borrower, make such
payments and do such acts as Bank considers necessary or reasonable to protect
its security interest in the Collateral.  Borrower agrees to assemble the
Collateral if Bank so requires, and to make the Collateral available to Bank as
Bank may designate.  Borrower authorizes Bank to enter the premises where the
Collateral is located, to take and maintain possession of the Collateral, or any
part of it, and to pay, purchase, contest, or compromise any encumbrance,
charge, or lien which in Bank's determination appears to be prior or superior to
its security interest and to pay all expenses incurred in connection therewith. 
With respect to any of Borrower's owned premises, Borrower hereby grants Bank a
license to enter into possession of such premises and to occupy the same,
without charge, in order to exercise any of Bank's rights or remedies provided
herein, at law, in equity, or otherwise;

               (e)   Without notice to Borrower set off and apply to the
Obligations any and all (i) balances and deposits of Borrower held by Bank, or
(ii) indebtedness at any time owing to or for the credit or the account of
Borrower held by Bank;

                                     15
<PAGE>

               (f)   Ship, reclaim, recover, store, finish, maintain, repair,
prepare for sale, advertise for sale, and sell (in the manner provided for
herein) the Collateral.  Bank is hereby granted a license or other right, solely
pursuant to the provisions of this Section 9.1, to use, without charge,
Borrower's labels, patents, copyrights, rights of use of any name, trade
secrets, trade names, trademarks, service marks, and advertising matter, or any
property of a similar nature, as it pertains to the Collateral, in completing
production of, advertising for sale, and selling any Collateral and, in
connection with Bank's exercise of its rights under this Section 9.1, Borrower's
rights under all licenses and all franchise agreements shall inure to Bank's
benefit;

               (g)   Sell the Collateral at either a public or private sale, or
both, by way of one or more contracts or transactions, for cash or on terms, in
such manner and at such places (including Borrower's premises) as Bank
determines is commercially reasonable, and apply any proceeds to the Obligations
in whatever manner or order Bank deems appropriate;

               (h)   Bank may credit bid and purchase at any public sale; and

               (i)   Any deficiency that exists after disposition of the
Collateral as provided above will be paid immediately by Borrower.

         9.2   POWER OF ATTORNEY.  Effective only upon the occurrence and during
the continuance of an Event of Default, Borrower hereby irrevocably appoints
Bank (and any of Bank's designated officers, or employees) as Borrower's true
and lawful attorney to:  (a) send requests for verification of Accounts or
notify account debtors of Bank's security interest in the Accounts; (b) endorse
Borrower's name on any checks or other forms of payment or security that may
come into Bank's possession; (c) sign Borrower's name on any invoice or bill of
lading relating to any Account, drafts against account debtors, schedules and
assignments of Accounts, verifications of Accounts, and notices to account
debtors; (d) make, settle, and adjust all claims under and decisions with
respect to Borrower's policies of insurance; and (e) settle and adjust disputes
and claims respecting the accounts directly with account debtors, for amounts
and upon terms which Bank determines to be reasonable; provided Bank may
exercise such power of attorney to sign the name of Borrower on any of the
documents described in Section 4.2 regardless of whether an Event of Default has
occurred.  The appointment of Bank as Borrower's attorney in fact, and each and
every one of Bank's rights and powers, being coupled with an interest, is
irrevocable until all of the Obligations have been fully repaid and performed
and Bank's obligation to provide advances hereunder is terminated.

         9.3   BANK EXPENSES.  If Borrower fails to pay any amounts or furnish
any required proof of payment due to third persons or entities, as required
under the terms of this Agreement, then Bank may do any or all of the following:
(a) make payment of the same or any part thereof; (b) set up such reserves under
the Revolving Facility as Bank deems necessary to protect Bank from the exposure
created by such failure; or (c) obtain and maintain insurance policies of the
type discussed in Section 6.6 of this Agreement, and take any action with
respect to such policies as Bank deems prudent.  Any amounts so paid or
deposited by Bank shall constitute Bank Expenses, shall be immediately due and
payable, and shall bear interest at the then applicable rate hereinabove
provided, and shall be secured by the Collateral.  Any payments made by Bank
shall not constitute an agreement by Bank to make similar payments in the future
or a waiver by Bank of any Event of Default under this Agreement.

         9.4   BANK'S LIABILITY FOR COLLATERAL.  So long as Bank complies with
reasonable banking practices, Bank shall not in any way or manner be liable or
responsible for:  (a) the safekeeping of the Collateral; (b) any loss or damage
thereto occurring or arising in any manner or fashion from any cause; (c) any
diminution in the value thereof; or (d) any act or default of any carrier,
warehouseman, bailee, forwarding agency, or other person whomsoever.  All risk
of loss, damage or destruction of the Collateral shall be borne by Borrower.

         9.5   REMEDIES CUMULATIVE.  Bank's rights and remedies under this 
Agreement, the Loan Documents, and all other agreements shall be cumulative. 
Bank shall have all other rights and remedies not inconsistent herewith as 
provided under the Code, by law, or in equity.  No exercise by Bank of one 
right or remedy shall be deemed an election, and no waiver by Bank of any 
Event of Default on Borrower's part shall be deemed a continuing waiver.  No 
delay by Bank shall constitute a waiver, election, or acquiescence by it.  No 

                                     16
<PAGE>

waiver by Bank shall be effective unless made in a written document signed on 
behalf of Bank and then shall be effective only in the specific instance and 
for the specific purpose for which it was given.

         9.6   DEMAND; PROTEST.  Borrower waives demand, protest, notice of
protest, notice of default or dishonor, notice of payment and nonpayment, notice
of any default, nonpayment at maturity, release, compromise, settlement,
extension, or renewal of accounts, documents, instruments, chattel paper, and
guarantees at any time held by Bank on which Borrower may in any way be liable.

    10.  NOTICES

         Unless otherwise provided in this Agreement, all notices or demands by
any party relating to this Agreement or any other agreement entered into in
connection herewith shall be in writing and (except for financial statements and
other informational documents which may be sent by first-class mail, postage
prepaid) shall be personally delivered or sent by a recognized overnight
delivery service, certified mail, postage prepaid, return receipt requested, or
by telefacsimile to Borrower or to Bank, as the case may be, at its addresses
set forth below:

    If to Borrower:     QualMark Corporation
                        1329 West 121st Avenue
                        Denver, CO  80234
                        Attn:  Vern Settle
                        FAX:  (303) 254-8343

    If to Bank:         Silicon Valley Bank
                        1731 Embarcadero Road, Suite 220
                        Palo Alto, CA  94303
                        Attn:  Greg Becker
                        FAX:  (415) 812-0640

    The parties hereto may change the address at which they are to receive
notices hereunder, by notice in writing in the foregoing manner given to the
other.

    11.  CHOICE OF LAW AND VENUE; JURY TRIAL WAIVER

         This Agreement shall be governed by, and construed in accordance with,
the internal laws of the State of California, without regard to principles of
conflicts of law.  Each of Borrower and Bank hereby submits to the exclusive
jurisdiction of the state and Federal courts located in the County of Santa
Clara, State of California.  BORROWER AND BANK EACH HEREBY WAIVE THEIR
RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION BASED UPON OR
ARISING OUT OF ANY OF THE LOAN DOCUMENTS OR ANY OF THE TRANSACTIONS CONTEMPLATED
THEREIN, INCLUDING CONTRACT CLAIMS, TORT CLAIMS, BREACH OF DUTY CLAIMS, AND ALL
OTHER COMMON LAW OR STATUTORY CLAIMS.  EACH PARTY RECOGNIZES AND AGREES THAT THE
FOREGOING WAIVER CONSTITUTES A MATERIAL INDUCEMENT FOR IT TO ENTER INTO THIS
AGREEMENT.  EACH PARTY REPRESENTS AND WARRANTS THAT IT HAS REVIEWED THIS WAIVER
WITH ITS LEGAL COUNSEL AND THAT IT KNOWINGLY AND VOLUNTARILY WAIVES ITS JURY
TRIAL RIGHTS FOLLOWING CONSULTATION WITH LEGAL COUNSEL.

    12.  GENERAL PROVISIONS

         12.1   SUCCESSORS AND ASSIGNS.  This Agreement shall bind and inure to
the benefit of the respective successors and permitted assigns of each of the
parties; PROVIDED, HOWEVER, that neither this Agreement nor any rights hereunder
may be assigned by Borrower without Bank's prior written consent, which consent
may be granted or withheld in Bank's sole discretion.  Bank shall have the right
without the consent of or notice 

                                     17
<PAGE>

to Borrower to sell, transfer, negotiate, or grant participation in all or any 
part of, or any interest in, Bank's obligations, rights and benefits hereunder.

         12.2   INDEMNIFICATION.  Borrower shall defend, indemnify and hold
harmless Bank and its officers, employees, and agents against:  (a) all
obligations, demands, claims, and liabilities claimed or asserted by any other
party in connection with the transactions contemplated by this Agreement; and
(b) all losses or Bank Expenses in any way suffered, incurred, or paid by Bank
as a result of or in any way arising out of, following, or consequential to
transactions between Bank and Borrower whether under this Agreement, or
otherwise (including without limitation reasonable attorneys fees and expenses),
except for losses caused by Bank's gross negligence or willful misconduct.

         12.3   TIME OF ESSENCE.  Time is of the essence for the performance of
all obligations set forth in this Agreement.

         12.4   SEVERABILITY OF PROVISIONS.  Each provision of this Agreement
shall be severable from every other provision of this Agreement for the purpose
of determining the legal enforceability of any specific provision.

         12.5   AMENDMENTS IN WRITING, INTEGRATION.  This Agreement cannot be
amended or terminated orally.  All prior agreements, understandings,
representations, warranties, and negotiations between the parties hereto with
respect to the subject matter of this Agreement, if any, are merged into this
Agreement and the Loan Documents.

         12.6   COUNTERPARTS.  This Agreement may be executed in any number of
counterparts and by different parties on separate counterparts, each of which,
when executed and delivered, shall be deemed to be an original, and all of
which, when taken together, shall constitute but one and the same Agreement.

         12.7   SURVIVAL.  All covenants, representations and warranties made in
this Agreement shall continue in full force and effect so long as any
Obligations remain outstanding.  The obligations of Borrower to indemnify Bank
with respect to the expenses, damages, losses, costs and liabilities described
in Section 12.2 shall survive until all applicable statute of limitations
periods with respect to actions that may be brought against Bank have run.

         12.8   CONFIDENTIALITY.  In handling any confidential information Bank
shall exercise the same degree of care that it exercises with respect to its own
proprietary information of the same types to maintain the confidentiality of any
non-public information thereby received or received pursuant to this Agreement
except that disclosure of such information may be made (i) to the subsidiaries
or affiliates of Bank in connection with their present or prospective business
relations with Borrower, (ii) to prospective transferees or purchasers of any
interest in the Loans, provided that they have entered into a comparable
confidentiality agreement in favor of Borrower and have delivered a copy to
Borrower, (iii) as required by law, regulations, rule or order, subpoena,
judicial order or similar order, (iv) as may be required in connection with the
examination, audit or similar investigation of Bank and (v) as Bank may
determine in connection with the enforcement of any remedies hereunder. 
Confidential information hereunder shall not include information that either:
(a) is in the public domain or in the knowledge or possession of Bank when
disclosed to Bank, or becomes part of the public domain after disclosure to Bank
through no fault of Bank; or (b) is disclosed to Bank by a third party, provided
Bank does not have actual knowledge that such third party is prohibited from
disclosing such information.

                                     18
<PAGE>

    IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed as of the date first above written.



                                       QUALMARK CORPORATION



                                       By: /s/ Vernon W. Settle
                                          -------------------------------
                                       Title: Director, Finance and
                                               Administration



                                       SILICON VALLEY BANK


                                       By: /s/ Frank J. Amorosso
                                          -------------------------------
                                       Title: Assistant Vice President


                                     19
<PAGE>

                                      EXHIBIT A


    The Collateral shall consist of all right, title and interest of Borrower
in and to the following:

    (a)  All goods and equipment now owned or hereafter acquired, including,
without limitation, all machinery, fixtures, vehicles (including motor vehicles
and trailers), and any interest in any of the foregoing, and all attachments,
accessories, accessions, replacements, substitutions, additions, and
improvements to any of the foregoing, wherever located;

    (b)  All inventory, now owned or hereafter acquired, including, without
limitation, all merchandise, raw materials, parts, supplies, packing and
shipping materials, work in process and finished products including such
inventory as is temporarily out of Borrower's custody or possession or in
transit and including any returns upon any accounts or other proceeds, including
insurance proceeds, resulting from the sale or disposition of any of the
foregoing and any documents of title representing any of the above, and
Borrower's Books relating to any of the foregoing;

    (c)  All contract rights and general intangibles now owned or hereafter
acquired, including, without limitation, goodwill, trademarks, servicemarks,
trade styles, trade names, patents, patent applications, leases, license
agreements, franchise agreements, blueprints, drawings, purchase orders,
customer lists, route lists, infringements, claims, computer programs, computer
discs, computer tapes, literature, reports, catalogs, design rights, income tax
refunds, payments of insurance and rights to payment of any kind;

    (d)  All now existing and hereafter arising accounts, contract rights,
royalties, license rights and all other forms of obligations owing to Borrower
arising out of the sale or lease of goods, the licensing of technology or the
rendering of services by Borrower, whether or not earned by performance, and any
and all credit insurance, guaranties, and other security therefor, as well as
all merchandise returned to or reclaimed by Borrower and Borrower's Books
relating to any of the foregoing;

    (e)  All documents, cash, deposit accounts, securities, letters of credit,
certificates of deposit, instruments and chattel paper now owned or hereafter
acquired and Borrower's Books relating to the foregoing;

    (f)  All copyright rights, copyright applications, copyright registrations
and like protections in each work of authorship and derivative work thereof,
whether published or unpublished, now owned or hereafter acquired; all trade
secret rights, including all rights to unpatented inventions, know-how,
operating manuals, license rights and agreements and confidential information,
now owned or hereafter acquired; all mask work or similar rights available for
the protection of semiconductor chips, now owned or hereafter acquired; all
claims for damages by way of any past, present and future infringement of any of
the foregoing; and

    (g)  Any and all claims, rights and interests in any of the above and all
substitutions for, additions and accessions to and proceeds thereof.

                                     20