ARIZONA INSTRUMENT CORP
10QSB, 1999-05-17
INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   FORM 10-QSB

                        QUARTERLY REPORT UNDER SECTION 13
                     OF THE SECURITIES EXCHANGE ACT OF 1934


For the Quarter Ended March 31, 1999                      Commission File Number
                                                                  0-12575

                         Arizona Instrument Corporation
             (Exact name of registrant as specified in its charter)


       Delaware                                         86-0410138
(State of Incorporation)                 (I.R.S. Employer Identification Number)


4114 East Wood Street, Phoenix, Arizona                 85040-1941
(Address of Principal Executive Offices)                (Zip Code)


Registrant's telephone number, including area code: (602) 470-1414


Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the  Securities  and  Exchange Act of 1934
during the preceding 12 months,  (or for such shorter period that the registrant
was  required  to file such  reports)  and (2) has been  subject to such  filing
requirements for the past 90 days.

                                    YES [X]  NO [ ]

As of May 10,  1999,  1,382,670  shares of Common  Stock  ($0.01 par value) were
outstanding.
<PAGE>
                         ARIZONA INSTRUMENT CORPORATION

                                TABLE OF CONTENTS

PART I. FINANCIAL INFORMATION

     Item 1 Financial Statements

            Consolidated Balance Sheets
              March 31, 1999 and December 31, 1998                         3

            Consolidated Statements of Operations
              Three months ended March 31, 1999 and
              March 31, 1998                                               4

            Consolidated Statements of Cash Flows
              Three months ended March 31, 1999 and
              March 31, 1998                                               5

            Notes to Consolidated Financial Statements                     7

     Item 2 Management's Discussion and Analysis of
            Financial Condition and Results of Operations                  9

PART II. OTHER INFORMATION

     Item 1 Legal Proceedings                                             11

     Item 4 Submission of Matters to a vote of Security Holders           11

     Item 5 Other Information                                             11

     Item 6 Exhibits and Reports on Form 8-K                              12

                                       2
<PAGE>
                 ARIZONA INSTRUMENT CORPORATION AND SUBSIDIARIES

                           CONSOLIDATED BALANCE SHEETS
<TABLE>
<CAPTION>
                                                  March 31, 1999    December 31, 1998
                                                  --------------    -----------------
                                     ASSETS
<S>                                                <C>                 <C>
CURRENT ASSETS:
  Cash and cash equivalents                        $ 1,980,624         $ 1,098,846
  Receivables, net                                   1,287,354           2,912,630
  Inventories                                        1,848,117           1,646,804
  Deferred Income Tax                                  625,000             625,000
  Prepaid expenses and other current assets             47,130              37,182
                                                   -----------         -----------
    Total current assets                             5,788,225           6,320,462

PROPERTY, PLANT AND EQUIPMENT, net                     822,688             861,808
GOODWILL, net of accumulated amortization            1,448,252           1,493,494
DEFERRED INCOME TAXES                                  465,000             465,000
OTHER ASSETS                                           608,994             638,191
                                                   -----------         -----------
TOTAL ASSETS                                       $ 9,133,159         $ 9,778,955
                                                   ===========         ===========

                      LIABILITIES AND SHAREHOLDERS' EQUITY

CURRENT LIABILITIES
  Lines of credit                                  $   150,000         $   300,000
  Accounts payable                                     330,103             277,743
  Current portion of long-term debt and
    capital lease obligations                           12,940              12,940
  Other accrued expenses                             1,232,286           1,683,875
                                                   -----------         -----------

    Total current liabilities                        1,725,329           2,274,558
                                                   -----------         -----------
LONG-TERM DEBT AND CAPITAL LEASE
  OBLIGATIONS - less current portions                    8,991              11,956

SHAREHOLDERS' EQUITY
 Common stock, .01 par value per share:
    Authorized, 10,000,000 shares;
    Issued, 1,382,698 and 1,372,504 shares              69,135              68,625
    Outstanding 1,362,999 and 1,352,805 shares
  Preferred stock, $.01 par value per share:
    Authorized, 1,000,000 shares
  Additional paid-in capital                         9,921,624           9,890,416
  Accumulated deficit                               (2,357,138)         (2,231,818)
                                                   -----------         -----------
                                                     7,633,621           7,727,223
  Less treasury stock, 19,699 shares at cost          (234,782)           (234,782)
                                                   -----------         -----------
    Total shareholders' equity                       7,398,839           7,492,441
                                                   -----------         -----------

TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY         $ 9,133,159         $ 9,778,955
                                                   ===========         ===========
</TABLE>
              See Notes to Consolidated Financial Statements

                                       3
<PAGE>
                 ARIZONA INSTRUMENT CORPORATION AND SUBSIDIARIES

                      CONSOLIDATED STATEMENTS OF OPERATIONS

                                                       Three Months Ended
                                               ---------------------------------
                                               March 31, 1999     March 31, 1998
                                               --------------     --------------
NET SALES                                       $ 1,850,832         $ 2,038,807

COST OF GOODS SOLD                                  671,486             797,419
                                                -----------         -----------

           Gross margin                           1,179,346           1,241,388
                                                -----------         -----------
EXPENSES
  Marketing                                         532,489             478,314
  General & administrative                          394,441             618,205
  Research & development                            198,636             222,529
  Amortization & depreciation                       104,450              99,521
                                                -----------         -----------

           Total Expenses                         1,230,016           1,418,569
                                                -----------         -----------

OPERATING LOSS                                      (50,670)           (177,181)
                                                -----------         -----------
OTHER REVENUE (EXPENSE)
  Interest income                                        --                  --
  Interest expense                                   (9,832)            (31,727)
  Other                                               4,264               4,978
                                                -----------         -----------

           Total other (expense)                     (5,568)            (26,749)
                                                -----------         -----------
LOSS BEFORE INCOME TAX BENEFIT FROM
CONTINUING OPERATIONS                               (56,238)           (203,930)

INCOME TAXES  BENEFIT                                    --             (69,000)
                                                -----------         -----------

LOSS FROM CONTINUING OPERATIONS                     (56,238)           (134,930)

(LOSS) INCOME FROM DISCONTINUED OPERATIONS, NET     (69,082)            268,000
                                                -----------         -----------

NET INCOME                                      $  (125,320)        $   133,070
                                                ===========         ===========
NET LOSS PER SHARE FROM CONTINUING
 OPERATIONS - BASIC:                            $     (0.04)        $     (0.10)
                                                ===========         ===========
NET (LOSS) INCOME PER SHARE FROM
 DISCONTINUED OPERATIONS - BASIC:               $     (0.05)        $      0.20
                                                ===========         ===========

NET (LOSS) INCOME PER SHARE - BASIC:            $     (0.09)        $      0.10
                                                ===========         ===========
NET LOSS PER SHARE FROM CONTINUING
 OPERATIONS - DILUTED:                          $     (0.04)        $     (0.10)
                                                ===========         ===========
NET (LOSS) INCOME PER SHARE FROM
 DISCONTINUED OPERATIONS- DILUTED:              $     (0.05)        $      0.20
                                                ===========         ===========

NET (LOSS) INCOME PER SHARE - DILUTED:          $     (0.09)        $      0.10
                                                ===========         ===========

BASIC SHARES OUTSTANDING (WEIGHTED AVERAGE)       1,361,300           1,343,064

EQUIVALENT SHARES - STOCK OPTIONS                        --              26,000
                                                -----------         -----------

DILUTED SHARES OUTSTANDING                        1,361,300           1,369,064
                                                ===========         ===========

                 See Notes to Consolidated Financial Statements

                                       4
<PAGE>
                 ARIZONA INSTRUMENT CORPORATION AND SUBSIDIARIES

                      CONSOLIDATED STATEMENTS OF CASH FLOWS


                                               March 31, 1999     March 31, 1998
                                               --------------     --------------
OPERATING ACTIVITIES:
  Net (loss) income                             $  (125,320)         $ 133,070

  Adjustments to reconcile net (loss)
   income to net cash provided (used)
   by operating activities:
   Depreciation and amortization                    149,324            179,257
   Decrease in receivables                        1,625,276            804,988
   (Increase) decrease in inventories              (201,313)           348,945
   (Increase) decrease in prepaid expenses
    and other current assets                         (5,519)             4,521
   Decrease in other assets                           1,611                761
   Decrease in deferred income tax                       --             70,051
   Decrease in accounts payable
     and other accrued expenses                    (399,229)          (708,428)
                                                -----------          ---------
NET CASH PROVIDED BY
  OPERATING ACTIVITIES                            1,044,830            833,165
                                                -----------          ---------
INVESTING ACTIVITIES:
  Purchases of capital equipment                    (41,804)           (97,574)
                                                -----------          ---------
NET CASH USED BY INVESTING
  ACTIVITIES                                        (41,804)           (97,574)
                                                -----------          ---------

                                       5
<PAGE>

                 ARIZONA INSTRUMENT CORPORATION AND SUBSIDIARIES

                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                   (continued)


                                               March 31, 1999     March 31, 1998
                                               --------------     --------------
FINANCING ACTIVITIES:
   Net payment under lines of credit             (150,000)           (66,000)
   Issuance of common stock pursuant to
     stock purchase plan                          31,717             31,811
  Payments of long-term debt and
     capital leases                               (2,965)          (103,617)
                                              -----------          ---------

NET CASH USED BY FINANCING
  ACTIVITIES                                     (121,248)          (137,806)
                                              -----------          ---------

NET INCREASE IN CASH AND CASH
  EQUIVALENTS                                     881,778            597,785

CASH AND CASH EQUIVALENTS,
  beginning of period                           1,098,846            143,173
                                              -----------          ---------

CASH AND CASH EQUIVALENTS
  end of period                               $ 1,980,624          $ 740,958
                                              ===========          =========

Supplemental cash flow information:

Interest expense                              $     9,833

                 See Notes to Consolidated Financial Statements

                                       6
<PAGE>
                 ARIZONA INSTRUMENT CORPORATION AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


1. CONSOLIDATED FINANCIAL STATEMENTS

The  consolidated  balance  sheet as of March  31,  1999,  and the  consolidated
statements of operations and cash flows for the three-month  periods ended March
31,  1999 and 1998 have been  prepared  by the  Company  without  audit.  In the
opinion of management,  all  adjustments  (which  include only normal  recurring
adjustments)  necessary to present  fairly the  financial  position at March 31,
1999 and the results of operations  and cash flows for the  three-month  periods
ended March 31, 1999 and March 31, 1998 have been made.

Certain  information  and footnote  disclosures  normally  included in financial
statements prepared in accordance with generally accepted accounting  principles
have been condensed or omitted.  These consolidated  financial statements should
be read in conjunction with the financial  statements and notes thereto included
in the  Company's  1998  Report on Form  10-KSB,  as  amended.  The  results  of
operations for the interim periods are not necessarily indicative of the results
to be obtained for the entire year.

2. INVENTORIES

Inventories consist of the following:

                                         March 31,          December 31,
                                           1999                1998
                                        ----------          ----------

          Finished Goods                $  620,896          $  480,515

          Components                     1,227,221           1,166,289
                                        ----------          ----------

                                        $1,848,117          $1,646,804
                                        ==========          ==========

                                       7
<PAGE>
SUBSEQUENT EVENT

In the first quarter of 1999, the Board of Directors and Company management made
the decision to dispose of its Encompass  and Soil Sentry lines of business.  In
April 1999 the Company sold its Encompass and Soil Sentry operations and certain
assets associated with these lines.

The first quarter  operating results of the Encompass and Soil Sentry operations
are  reflected  as  discontinued  operations  in the  accompanying  statement of
operations.  The pro-forma balance sheet reflecting the disposition as if it had
occurred at March 31, 1999 is as follows:

                                                                     Pro-forma
                                                                    adjusted for
                                        As reported   Adjustments   disposition
                                        -----------   -----------   -----------
Assets:
  Cash and cash equivalents             $1,980,624     $1,061,531    $3,042,155
  Receivables, net                       1,287,354             --     1,287,354
  Inventories                            1,848,117       (876,772)      971,345
  Other current assets                      47,130         (8,150)       38,980
  Property, plant and equipment            822,688        (55,069)      767,619
  Goodwill, net                          1,448,252             --     1,448,252
  Deferred income taxes                  1,090,000             --     1,090,000
  Other assets                             608,994       (121,540)      487,454
                                        ----------     ----------    ----------
     Total assets                       $9,133,159     $       --    $9,133,159
                                        ==========     ==========    ==========
Liabilities and Shareholders' Equity:
  Current liabilities                   $1,725,329     $       --    $1,725,329
  Long term debt                             8,991             --         8,991
  Shareholders' equity                   7,398,839             --     7,398,839
                                        ----------     ----------    ----------
     Total liabilities & shareholders
      equity                            $9,133,159     $       --    $9,133,159
                                        ==========     ==========    ==========

                                       8
<PAGE>
The following discussion should be read in conjunction with, and is qualified in
its entirety  by, the  Company's  Consolidated  Financial  Statements  and Notes
thereto  appearing  elsewhere  herein.  Historical  results are not  necessarily
indicative of trends in operating results for any future period.

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS
        AND FINANCIAL CONDITION

The statements  contained  herein  regarding  management's  anticipation  of the
Company's future market position,  development of additional  products,  product
introduction  and delivery dates,  reliability of products,  adequate sources of
supplies,  acquisition  of related  product  lines or  companies,  and  positive
responses to new developments,  constitute  "forward-looking"  statements within
the  meaning  of  the  Private   Securities   Litigation  Reform  Act  of  1995.
Management's   anticipation  is  based  upon  assumption   regarding  levels  of
competition, research and development results, product introduction and delivery
schedules,  raw material markets, the markets in which the Company operates, and
stability of the regulatory  environment.  Any of these  assumptions could prove
inaccurate,  and therefore  there can be no assurance  that the  forward-looking
information will prove to be accurate.

RESULTS OF OPERATIONS:

THREE MONTHS ENDED MARCH 31, 1999 AND MARCH 31, 1998

Net sales from  continuing  product  lines for the three  months ended March 31,
1999 decreased 9% or $187,975 to $1,850,832  from  $2,038,807  generated for the
first three months of 1998.  This  decrease  was due to  decreased  sales of the
Company's  instruments and decrease of non-recurring sales of miscellaneous tank
testing revenue.

Cost of goods sold for the three  months  ended March 31, 1999 was  $671,486,  a
decrease of 16% from the  $797,419  incurred for the first three months of 1998.
The decrease in cost of goods sold was primarily  due to improved  manufacturing
efficiencies  and,  to a lessor  extent,  the  costs of  goods  associated  with
decreased sales.

Operating expenses for the first quarter of 1999 were $1,230,016,  a decrease of
$188,553 or 13% as compared to operating  expenses of  $1,418,569  for the first
quarter of 1998. Marketing expenses for the first quarter of 1999 were $532,489,
an increase of 11% or $54,175 over the same period in 1998.  Increased marketing
expenses were due to a higher level of selling and marketing  activity  required
to support the  Company's  domestic and  international  operations.  General and
administrative  expenses for the first quarter of 1999 were $394,441, a decrease
of 36% or $223,763 as compared to the first  quarter of 1998,  due  primarily to
reduction in capital  leases,  property  maintenance,  insurance costs and other
miscellaneous expenses.  Research and development expenses for the first quarter
of 1999 were $198,636,  a decrease of 11% or $23,893 compared to the $222,529 of
research and development expenses incurred in the first quarter of 1998.

                                       9
<PAGE>
Other  expenses for the first quarter of 1999 were $5,568,  a decrease of 79% or
$21,181 from the $26,749 in other  expenses  incurred  for the first  quarter of
1998. This decrease was due primarily to a reduction in interest  expense due to
lower  levels of  borrowing  by the  Company for the first  quarter of 1999,  as
compared to the first quarter of 1998.

As a result of these changes, loss before taxes on continuing operations for the
first  quarter of 1999 was $56,238 as compared to the loss of $203,930  recorded
for the first quarter of 1998.  The company made no provisions for a tax benefit
in 1999, as it views its' deferred tax provision as adequate.  The company had a
tax benefit of $69,000 in 1998,  which was computed  using the  statutory  rate.
Loss from  continuing  operations  for the first  quarter  of 1999 was  $56,238,
compared to a loss of 134,930 recorded for the first quarter of 1998.

For the  three  months  ended  March  31,  1999,  the  Company  had a loss  from
discontinued  operations of $69,082 which was due primarily to expenses incurred
in  discontinuing  the Company's  Soil Sentry and Encompass  business,  and to a
lesser  extent,  the loss  incurred in operating  the Soil Sentry and  Encompass
business over the period.

The net loss for the first quarter was $125,320 as compared to the net income of
$133,070 achieved for the first quarter of 1998.

The Company has  historically  experienced and expects to continue to experience
quarterly  fluctuations,  potentially  in a material  amount,  in its  operating
results.  A variety of factors  influence the Company's  operating  results in a
particular period, including economic conditions in the industries served by the
Company,  regulatory  developments,  the timing of significant orders,  shipment
delays,  specific features  requested by the customers,  the introduction of new
products by the Company and its competitors,  market  acceptance of new products
and  enhancements  of  existing  products,  changes  in the  cost of  materials,
disruptions  in the  sources of  supply,  seasonal  variations  of  spending  by
customers,  the timing of the Company's  expenditures  in anticipation of future
orders and other factors, many of which are beyond the Company's control.

LIQUIDITY AND CAPITAL RESOURCES:

Working  capital at March 31, 1999 was  $4,062,896,  an increase of $16,992,  or
 .4%, from the working  capital of  $4,045,904  as of December 31, 1998.  Working
capital increased due to a an increase in cash, as well as due to a reduction on
the line of credit and accrued expenses which offset a reduction in receivables.
As a result,  the Company's  current ratio as of March 31, 1999 increased to 3.4
from a current ratio of 2.8 as of December 31, 1998.

The  Company  currently  has  one  line  of  credit  available  through  a bank,
collateralized  by  accounts  receivable,  inventory,  and  property,  plant and
equipment  which  provides for a maximum  commitment of $2,000,000 through June,
1999.  Advances  can be made  against  the lines  based on  qualified  levels of
receivables and inventory.  At March 31, 1999,  $150,000 had been borrowed under
this line of credit.

The  Company  believes  that cash  generated  from  ongoing  operations  and the
borrowing  arrangements  described  above  will  satisfy  the  anticipated  cash
requirements of the Company's current operations over the next 12 months, though
there can be no assurance that this will be the case.  The Company's  ability to
continue funding its planned  operations  beyond the next 12 months is dependent
upon its ability to generate  sufficient  cash flow to meet its obligations on a
timely basis, or to obtain additional funds though equity or debt financing,  or
from other sources of financing, as may be required.

                                       10
<PAGE>
PART II. OTHER INFORMATION

ITEM 1 LEGAL PROCEEDINGS

Information  is  incorporated  by reference  from the  Company's  Report on Form
10-KSB, as amended, for the year ended December 31, 1998.

ITEM 4 SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

a)   A special  meeting of the  stockholders  of the Company (the "Meeting") was
     held on  February  5, 1999.  Proxy  statements  pursuant to Rule 14A of the
     Exchange Act were mailed to  shareholders  on or about  January 8, 1999 and
     filed with the Securities and Exchange Commission.

b)   At the Meeting,  the stockholders  approved of a reverse stock split of the
     issued and  outstanding  shares of common stock at a ratio to be decided by
     the Board of  Directors,  but not to exceed 5 to 1.  There  were  6,093,110
     votes in favor of the  proposed  reverse  stock split and  amendment of the
     Certificate of Incorporation  accordingly and 257,372 votes against.  There
     were no abstentions and no broker non-votes.

ITEM 5 OTHER INFORMATION

a)   The following  information  provided herein and elsewhere in this 10 KSB is
     in lieu of  filing  on  Form  8-K,  item 2.  

     On April  30,  1999,  Arizona  Instrument  Corp.,  a  Delaware  corporation
     ("AZIC")  sold certain  assets  related to the  Encompass  Systems and Soil
     Sentry Systems line of products to National  Environmental Service, Co., an
     Oklahoma  corporation  ("NESCO"),  pursuant to an Asset Purchase  Agreement
     (the  "Agreement")  dated April 30,  1999,  which is filed as an exhibit to
     this  report.  AZIC  was  paid an  adjusted  aggregate  purchase  price  of
     $1,061,531 in cash for the sale.

     The Agreement was negotiated at arm's length between AZIC and NESCO.  Prior
     to the sale,  none of the  directors,  officers or associates of NESCO,  or
     their  affiliates,  were or are affiliated with AZIC, its  affiliates,  its
     directors and officers and their associates.

     The  principal  business  sold  to  NESCO  is  the  marketing,   licensing,
     distributing,  developing,  manufacturing,  service  and  operating  of the
     Encompass  Systems and Soil Sentry Stystems and the monitoring  services on
     behalf of such product users.

     George G. Hays, President, stated that the divestiture of the Encompass and
     Soil  Sentry  product  lines  should  enable  AZI  to  better  utilize  its
     technical,  marketing,  and financial  resources.  He indicated  that AZI's
     increased commitment to its historic core businesses,  which began in early
     1998 as part of the Company's  turnaround program,  has already borne fruit
     with the recent  introduction of the Computrac 4000, an instrument designed
     to measure the moisture content in edible oils,  lubricating/cooling  oils,
     and heavy fuels.

                                       11
<PAGE>
b)   The employment  agreement  between George G. Hays and the Company effective
     as of January 1, 1998 was amended by the Board of Directors effective March
     18, 1999.  Pursuant to the amendment,  the term of the employment  contract
     was  extended to March 31,  2001.  The  contract  was  further  modified by
     granting Mr. Hays his salary for the full term of the contract in the event
     the Company sells all or substantially  all of its assets or if a change in
     control of the Company occurs.

c)   The Company currently has a line of credit with Imperial Bank. At March 31,
     1999, the Company was in default under certain  financial  covenants of its
     borrowing  agreement  with  the  bank.  The bank has  granted  the  Company
     forbearance  from  compliance  with  these  covenants,  subject  to certain
     customary conditions including one relating to the Company's affirmation of
     its current compliance with all the  representations and warranties it made
     in the original  borrowing  agreement.  Currently  there is no  outstanding
     balance on the line of credit.

ITEM 6 EXHIBITS AND REPORTS ON FORM 8-K

     (a)  EXHIBITS

          2.1   Asset Purchase  Agreement  dated April 30, 1999 between  Arizona
                Instrument  Corporation  and  National   Environmental   Service
                Company. Filed herewith.

          3.1   Composite Certificate of  Incorporation of Registrant as amended
                through February 16, 1999. Filed herewith.

          10.1  Amendment of  Employment  agreement  between  George G. Hays and
                Registrant dated  March  18,  1999.   (Management   contract  or
                compensatory plan)

          27    Financial Data Schedule. Filed herewith.

     (b)  THE FOLLOWING FORM 8-K WAS FILED BY THE REGISTRANT  DURING THE QUARTER
          ENDING MARCH 31, 1999:

          Form 8-K  filed  February  24,  1998  reporting  under  Item 5 that on
          February 16, 1999 the registrant had effected a reverse stock split of
          the outstanding  common stock at a 5 to 1 ratio and made amendments to
          the registrant's Certificate of Incorporation accordingly.

                                       12
<PAGE>
                                   SIGNATURES

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.

ARIZONA INSTRUMENT CORPORATION





Date May 14, 1999                              /s/ George G. Hays
                                               ---------------------------------
                                               George G. Hays, President and CEO
                                               (Authorized officer)

Date May 14, 1999                              /s/ Linda J. Shepherd
                                               ---------------------------------
                                               Linda J. Shepherd, Controller
                                               (Principal Accounting officer)

                                       13

EXHIBIT 2.1

                            ASSET PURCHASE AGREEMENT

                                     BETWEEN

                         ARIZONA INSTRUMENT CORPORATION,
                                    AS SELLER

                                       AND

                       NATIONAL ENVIRONMENTAL SERVICE CO.,
                                    AS BUYER

<PAGE>
                            ASSET PURCHASE AGREEMENT


                  This Asset Purchase  Agreement is entered into as of April 30,
1999 (this "Agreement"),  by and between National  Environmental Service Co., an
Oklahoma corporation ("Buyer"),  and Arizona Instrument Corporation,  a Delaware
corporation ("Seller").

                  WHEREAS,  on the  terms,  in the  manner  and  subject  to the
conditions reflected below, Seller desires to sell, assign,  convey and transfer
to Buyer,  and Buyer  desires to purchase and acquire  from  Seller,  all of the
Purchased Assets defined below.

                  NOW,  THEREFORE,  in  consideration  of the  premises  and the
mutual representations,  warranties,  covenants and agreements herein set forth,
the parties to this Agreement have agreed, and hereby agree subject to the terms
and conditions hereinafter set forth, as follows:

                              ARTICLE IDEFINITIONS

                  Capitalized terms used herein shall have the meanings ascribed
to them in this  Article I,  unless  such terms are  defined  elsewhere  in this
Agreement.

         Affiliates:  of any person means persons who control, are controlled by
or in common control with such person.

         Allocation: as defined in Section 2.06.

         Assumed Employees: as defined in Section 7.01.

         Assumed Liabilities: as defined in Section 2.04.

         Assumed Warranty Obligations: as defined in SCHEDULE 2.04.

         BP Litigation: as defined in Section 2.04.

         Business: as defined in Section 2.02.

         Closing: as defined in Section 2.01(b).

         Closing Date: as defined in Section 2.01(b).
                                       2
<PAGE>
         Closing Payment: as defined in Section 2.03(a).

         Delaware Law: the Delaware General Corporation Law, as amended

         Encompass System Revenues: as defined in Section 2.03(b).

         Excluded  Assets:  any of the assets of Seller  other than those assets
included  in  Section  2.02,  including,  without  limitation,  (i)  cash,  cash
equivalents and receivables, (ii) real estate or any rights under leases to real
estate,  (iii)  Seller's  business  records,  corporate  minute book and charter
documents, and (iv) all assets of Seller not solely and exclusively necessary to
own and operate  the  Business in the manner  heretofore  owned and  operated by
Seller.

         Excluded Liabilities: as defined in Section 2.04(b).

         GAAP: United States generally accepted accounting principles.

         Governmental  Entity:  any  court,  government,   governmental  agency,
commission or instrumentality, domestic or foreign.

         Legal Requirements:  any law, statute, ordinance,  decree, requirement,
order,  judgment,  rule or  regulation  of,  including the terms of any license,
certificate,  franchise  or permit  issued  by, the  United  States,  any state,
commonwealth,  territory  or  possession  thereof and any  political or judicial
subdivision or instrumentality of the foregoing,  including, without limitation,
courts, departments, commissions, boards, bureaus or agencies.

         Oklahoma Law: the Oklahoma General Corporation Act, as amended.

         Purchased Assets: those assets defined in Section 2.02.

         Purchase Price: the consideration to be paid by Buyer to Seller for the
Purchased Assets as provided in Article II.

         Taxes: all net income, gross income, gross receipts,  sales and use, ad
valorem, franchise, profits, licenses, withholding,  payroll, excise, severance,
stamp, occupation,  property,  customs duties or other taxes, fees or charges of
any kind whatsoever imposed by a foreign, federal, state, county or local taxing
authority together with any interest or penalty thereon.

         Transaction: the sale and purchase of the Purchased Assets pursuant to,
and the related transactions contemplated by, this Agreement.

         Transaction Documents:  the documents,  instruments,  agreements,  etc.
referred to in Section 2.01(b).

                                       3
<PAGE>
         Year 2000 Compliant:  software that is designed to do the following, as
may be applicable to each software, subject to potential deviation that will not
materially  and  adversely  affect the use of such  software:  (i)  handle  date
information  before,  during,  and after  January  1, 2000,  and will  correctly
recognize,  calculate,  process,  sequence, store and transmit date data without
error or  interruption,  including  leap years;  (ii)  function  accurately  and
without  interruption  before,  during and after  January 1, 2000,  without  any
change  in  operations  associated  with the  advent of the new  century;  (iii)
respond to year-date input in a way that resolves any ambiguity as to century in
a defined and  predetermined  manner;  and (iv) store and provide output of date
information in a way that is unambiguous as to century.

                                   ARTICLE II
                            ASSET PURCHASE AND SALE

                  2.01 The Transaction.  (a) At the Closing,  in accordance with
the  provisions  the  terms  of this  Agreement,  Seller  shall  (or  cause  its
subsidiaries  to) sell  assign,  convey,  transfer  and  deliver  to  Buyer  the
Purchased  Assets,  and Buyer  shall pay to Seller  the  Purchase  Price for the
Purchased Assets as contemplated by Section 2.03 below.

                  (b)  The  consummation  of  the  transaction  contemplated  by
Section 2.01(a) together with the delivery of the various deeds,  bills of sale,
assignments,  conveyances,  certificates,  agreements, assumptions, opinions and
other documents  required or  contemplated  by this Agreement (the  "Transaction
Documents")  is herein called the  "Closing." It is  anticipated  by the parties
that the Closing  shall take place at the  offices of Quarles & Brady,  One East
Camelback,  Suite 400, Phoenix,  Arizona, at 10:00 a.m., local time on April 30,
1999 (the "Closing Date").

                  2.02  Assets to be  Acquired  . The assets to be  acquired  by
Buyer shall include all of the right, title and interest of Seller or any of its
subsidiaries  in and to all of the assets used by Seller solely and  exclusively
in the  business  of owning,  marketing,  licensing,  distributing,  developing,
manufacturing,  servicing and  operating  the Encompass  Systems and Soil Sentry
Systems and conducting  the  monitoring  services on behalf of the users of such
products (the  "Business")  which assets include the following  (the  "Purchased
Assets"):

                  (a) Patents and Know-How. All right, title and interest in and
to (i) all patents,  patent applications and docketed  inventions,  domestic and
foreign relating solely and exclusively to the Encompass Systems and Soil Sentry
Systems (the "Patents"),  including without  limitation those that are listed on
SCHEDULE  2.02(A)  hereto,  and  (ii)  all  research  and  development  results,
processes, trade secrets, methods, operating techniques,  know-how,  algorithms,
formulae,   specifications,   drawings,   designs,  chip  designs,   inventions,
engineering information, and quality control, testing, operational,  logistical,
maintenance and other  technical data and  information  and technology  relating
solely and  exclusively  to the Encompass  Systems and Soil Sentry  Systems (the
"Know-How").

                                       4
<PAGE>
                  (b) Trademarks and Copyrights.  All right, title, interest and
goodwill  in  and  to  all  trademarks,  trade  names  and  service  marks,  and
registrations  and  applications  for such  trademarks,  trade names and service
marks  domestic and foreign,  to the extent used solely and  exclusively  in the
Business (the "Trademarks"),  including without limitation those that are listed
on  SCHEDULE  2.02(B),  and  all  right,  title,  and  interest  in  and  to all
copyrights, and registrations and applications for such copyrights, domestic and
foreign,  to the  extent  used  solely  and  exclusively  in the  Business  (the
"Copyrights"),  including  without  limitation those that are listed on SCHEDULE
2.02(B).

                  (c)  Equipment.   All  of  the  test   equipment,   computers,
machinery,  tools,  demonstration  units,  and other  tangible  assets listed on
SCHEDULE 2.02(C) (collectively, the "Equipment").

                  (d)  Computer   Software.   All  right,   title  and  interest
(including  copyright  interests)  in and to all  computer  programs  (including
computer modeling programs, design and operational and applications software and
computer source and object codes),  firmware,  computer data bases,  and related
documentation, solely and exclusively developed or used for the use or operation
of (i) the Encompass Systems or Soil Sentry Systems,  (ii) the Equipment,  (iii)
the  Site  Trac  program  or  (iv)  for  design,  development,  engineering,  or
manufacturing  purposes,  related thereto,  (the "Software"),  including without
limitation the computer programs identified on SCHEDULE 2.02(D).

                  (e) Warranties and Other Rights.  All rights under or pursuant
to all  warranties,  representations,  guarantees  and service  contacts made by
suppliers, manufacturers and contractors in connection with products or services
purchased by Seller or any of its  subsidiaries  affecting  the Equipment or the
Software.

                  (f)  Contracts.  All  contracts,  subcontracts,  licenses  and
sublicenses,  distribution,  franchise,  representative and marketing rights and
agreements and agreements and other arrangements,  proposals,  bids, quotations,
purchase   orders  and   commitments,   sales   orders  and   commitments,   and
manufacturing,  servicing and monitoring agreements of any kind, whether written
or oral, including joint venture,  teaming and partnership agreements solely and
exclusively  relating  to the  Business  (the  "Contracts"),  including  without
limitation those Contracts identified on SCHEDULE 2.02(F).

                  (g) Causes of Action.  All causes of action,  claims or rights
of action  against  third  parties  arising  from or based on the  infringement,
misappropriation,  misuse or unauthorized use of the Patents, the Know-How,  the
Software, the Trademarks or the Copyrights.

                  (h) Other.  All right,  title and interest of Seller in and to
all licenses and permits solely and exclusively  related to the Business and the
Purchased  Assets  and all  customer  and  supplier  lists and sales  literature
related solely and exclusively to the Business.

                                       5
<PAGE>
                  (i) Inventory. All raw material, work in process,  components,
completed  Encompass  Systems and Soil  Sentry  Systems  products  and all other
merchantable  inventory  as of  the  date  hereof,  to  the  extent  solely  and
exclusively  manufactured and/or held for sale in the Business,  as set forth on
SCHEDULE 2.02(I), and updated as of the Closing Date.

                  2.03 Purchase Price . (a) The purchase price for the Purchased
Assets (the  "Purchase  Price")  shall be  $1,000,000,  subject to adjustment as
provided  in (c) below,  payable  in cash at the  Closing  by wire  transfer  of
immediately  available funds (the "Closing  Payment") plus the royalty  payments
described in Section 2.03(b) below.

                  (b) As part of the  Purchase  Price,  Buyer shall pay Seller a
royalty payment equal to the percentage indicated below of the revenues realized
by Buyer from its sales and leasing of, and monitoring,  enhancement,  licensing
and other services and rights  relating  solely and exclusively to the Encompass
Systems and the patent and other  intellectual  property rights relating thereto
("Encompass  System  Revenues").  For the period from the Closing Date until the
second  anniversary of the Closing Date,  the royalty  payment shall equal 5% of
the  Encompass  System  Revenues  and,  for  the  period  following  the  second
anniversary  of the Closing Date to the fifth  anniversary  of the Closing Date,
the  royalty  payment  shall be equal to 3% of the  Encompass  System  Revenues.
Encompass  System  Revenues shall not include any revenues  realized by Buyer in
connection  with the  installation  or repair  of  Encompass  Systems  but shall
include  revenues  attributable  to  monitoring  services,  software  and patent
licensing and  enhancements  and technical  support and other sources  generally
attributable  to  the  intellectual  property  rights  in  and  relating  to the
Encompass   Systems   and  which  are   included   in  the   Purchased   Assets.
Notwithstanding  anything in the  foregoing to the  contrary,  Encompass  System
Revenues realized by Buyer shall not include or shall be reduced by, as the case
may be:

                          (i) the  amount  of any sales  taxes,  use  taxes,  ad
                  valorem or other personal property taxes, and any other taxes,
                  fees  or   assessments   payable   to  any   governmental   or
                  quasi-governmental  authority  or  agency in  connection  with
                  Encompass Systems or any services, rights or interests related
                  thereto  other  than  federal,  state  or local  income  taxes
                  payable by Buyer in respect of the revenues it receives  which
                  are attributable to the Encompass Systems;

                          (ii) any commissions,  fees,  remuneration and expense
                  reimbursements  paid to any independent sales  representatives
                  by Buyer in  connection  with any  sales,  services  or rights
                  giving rise to Encompass System Revenues; and

                          (iii) any  rebates,  returns,  allowances,  discounts,
                  set-offs,  refunds or  recoveries  paid or granted by Buyer in
                  connection  with any sales,  services or rights giving rise to
                  Encompass System Revenues.

The royalty  payments due Seller on Encompass  System Revenues  pursuant to this
Section 2.02(b) shall be paid by Buyer on or before the last business day of the
month following the calendar  quarters ending each March 31, June 30,  September
30 and December 31 for each such calendar  quarter and on or before the 30th day
following  the fifth  anniversary  of the  Closing  Date for the period  covered
thereby. Buyer shall provide a report containing an itemization of its Encompass
System Revenues applicable to each period with its payment.

                                       6
<PAGE>
                  Seller or its  designated  agent shall be  provided  access to
such books and records of Buyer as may be necessary to determine or audit,  with
respect to any period covering no more than four calendar  quarters prior to the
date of such  request,  the  correctness  of  payments  made or due  under  this
Agreement,  or to obtain  information about payments under this Agreement.  Such
examination  shall  be  during  reasonable  business  hours.  If  Seller  or its
designated  agent,  through an audit or otherwise,  shall have any objections to
any amount of royalties paid Seller hereunder,  it will deliver a written report
to Buyer within  forty-five days after the date of Seller's written notice above
describing in detail Seller's objections.  Each of Buyer and Seller will use its
commercially  reasonable  efforts to resolve any such objections.  If Buyer does
not dispute  Seller's report,  it shall pay any additional  royalties due Seller
within  five days of its  receipt of Seller's  report.  In the event  Seller and
Buyer are unable to resolve any disputed  amount owed hereunder  within fourteen
(14) days after Buyer has received the report of Seller's objections,  Buyer and
Seller  shall  select a mutually  acceptable  independent  accounting  firm (the
"Auditor") will resolve any unresolved objections. The Auditor shall have access
to such books and records of Buyer, including all purchase orders and agreements
with respect to the Encompass  Systems,  as it deems  necessary to determine the
amount of royalties due  hereunder.  The Auditor  shall  determine the amount of
royalties due with respect to the  period(s)  under review and  communicate  the
determination  to Buyer and Seller in  writing,  not later than thirty (30) days
following  the  date of its  receipt  of such  dispute,  such  determination  to
constitute  the final  amount due with respect to such  period.  Any  additional
royalties  due Seller  pursuant to the  Auditor's  report shall be paid by Buyer
within five days of its receipt of the Auditor's report. If any determination by
the Auditor shows that  royalties  were  underpaid by Buyer by an amount of five
percent (5%) or more,  the Buyer shall promptly pay all fees and expenses of the
Auditor. In the event the Auditor's determination shows that royalties to Seller
were  underpaid  by Buyer by an amount of less than five  percent  (5%),  Seller
shall promptly pay all fees and expenses of the Auditor and bear all of Seller's
expenses in connection with its examination pursuant hereto.

                  (c) The Purchase  Price is subject to  adjustment,  upwards or
downwards,  based on a physical  inventory of the  Purchased  Assets to be taken
immediately prior to Closing. Immediately before the Closing, representatives of
Seller and Buyer shall  conduct a complete  physical  inventory of the Purchased
Assets. Before the final Purchase Price is determined, a report of this physical
inventory shall be prepared and signed by the authorized representatives of both
Seller and Buyer,  which report shall be final and binding on other  parties for
all purposes.  The report shall be as specific as possible in  identifying  each
asset by serial number,  stock number or other  identifying mark. The adjustment
in the Purchase Price shall equal the amount by which the value of the Purchased
Assets is  greater  or  lesser  than  $1,000,000,  and such  adjustment  will be
reflected in the Closing Payment.  The inventory and intangible  assets included
in the Purchased  Assets shall be valued at the Seller's  depreciated book value
maintained in accordance  with GAAP. All other assets  included in the Purchased
Assets  shall be valued at an amount  agreed  upon by Buyer and Seller  prior to
Closing.

                                       7
<PAGE>
                  2.04  Assumption  of Assumed  Liabilities  . (a) As additional
consideration  to Seller  included in the Purchase Price and in exchange for the
performance by Seller of its obligations hereunder,  effective as of the Closing
Date, Buyer hereby assumes and agrees to pay,  discharge and perform as and when
due, (i) all liabilities and obligations (including all obligations with respect
to  performance)  arising  under each of the  Contracts  after the Closing Date,
except  for such  post-Closing  liabilities  that  are  expressly  set  forth as
Excluded  Liabilities  in  Section  2.04(b)  below,  and (ii)  those  additional
liabilities  and   obligations   expressly  set  forth  on  SCHEDULE  2.04.  The
liabilities and obligations  described in the preceding sentence are referred to
herein as the "Assumed Liabilities."

                  (b) Subject to the other  provisions of this Agreement,  it is
understood  and agreed that Seller  shall  retain all  liability  for, and Buyer
shall  not  assume  or have  any  obligation  with  respect  to,  the  following
obligations or liabilities of Seller (all such obligations and liabilities being
herein referred to as the "Excluded Liabilities"):

                          (i) any and all  obligations  of Seller  arising under
                  law or contract  with respect to any  individual in connection
                  with his or her  employment  by  Seller  before  or after  the
                  Closing  including  obligations  arising  in  connection  with
                  Seller's  termination of his or her employment  with Seller at
                  any time,  regardless of whether such  obligations  would have
                  arisen had Buyer chosen to employ any such employee  following
                  Closing, including, without limitation,  obligations under any
                  and all of  Seller's  severance  benefits,  medical  or  other
                  insurance coverages,  retirement benefits or any other benefit
                  or obligation of Seller of whatsoever  nature,  arising out of
                  the employment relationship between Seller and such employee;

                          (ii) the occupancy, ownership, use or operation of the
                  Purchased  Assets or the operation of the Business on or prior
                  to the  Closing  Date  including,  without  limitation,  taxes
                  attributable  to the period on and before  Closing but not due
                  and payable as of the Closing;

                          (iii) any liability,  obligation or expense heretofore
                  or  which  may  hereafter  be  incurred  with  respect  to the
                  Encompass Systems and Soil Sentry Systems placed in service by
                  Seller  prior to Closing  based on such systems not being Year
                  2000  Compliant  or incurred  with  respect to such systems to
                  render them Year 2000 Complaint; and

                          (iv) any liability,  obligation or expense  heretofore
                  or which may  hereafter  be incurred  by Seller in  connection
                  with  lawsuit  filed  against  Seller by BP Oil Company in the
                  United States District Court in the Northeast District of Ohio
                  (the "BP  Litigation").

                                       8
<PAGE>
                  (c) Buyer hereby agrees to indemnify, defend and hold harmless
Seller with respect to any claims,  damages or liability arising with respect to
the Assumed Liabilities and, after Closing, with respect to the Purchased Assets
and the Business.  Seller  hereby agrees to indemnify,  defend and hold harmless
Buyer with respect to any claims,  damages or liability  arising with respect to
the Excluded Liabilities.

                           2.05  Excluded  Assets.  Seller  shall not sell,  and
                  Buyer is under no obligation to buy, the Excluded Assets.

                           2.06 Allocation of Purchase  Price.  Buyer and Seller
                  agree  that  the  Purchase  Price  shall be  allocated  to the
                  Purchased  Assets in accordance with SCHEDULE 2.06 hereto (the
                  "Allocation").  Buyer and  Seller  shall  report  the sale and
                  purchase of the  Purchased  Assets for all income tax purposes
                  in  a  manner   consistent  with  the  Allocation  and  hereby
                  acknowledge  that the Allocation  was  determined  pursuant to
                  arm's length bargaining between them regarding the fair market
                  value for the Purchased Assets.

                           2.07 Treatment of Accounts  Receivable . All accounts
                  receivable of Seller arising prior to the Closing shall remain
                  the  property  of Seller,  and Seller  shall have the right to
                  pursue  collection  of  such  receivables  through  reasonable
                  methods  after the Closing  Date.  Seller shall be entitled to
                  retain (and if received by Buyer,  Buyer shall remit to Seller
                  within five (5) business days after receipt) all payments made
                  on   receivables   after   Closing  until  such  time  as  the
                  pre-Closing receivables have been paid in full. Buyer shall be
                  entitled to retain (and if  received by Seller,  Seller  shall
                  remit to Buyer  within five (5) business  days after  receipt)
                  all payments made on receivables  of Buyer.  At or immediately
                  after Closing,  Seller shall provide Buyer a true and accurate
                  schedule of accounts  receivable related to the Business as of
                  the Closing Date.

                                  ARTICLE III
                    REPRESENTATIONS AND WARRANTIES OF SELLER

                  Seller hereby represents and warrants to Buyer as follows:

                  3.01 Organization,  Good Standing and Corporate Power . Seller
is a corporation duly organized, validly existing and in good standing under the
laws of the  State  of  Delaware  and  has the  requisite  corporate  power  and
authority to carry on its business as it is now being conducted.  Seller is duly
qualified as a foreign corporation to do business,  and is in good standing,  in
each  jurisdiction  where the character of the properties owned or leased by it,
or the  nature  of its  activities,  is such  that  qualification  as a  foreign
corporation in that jurisdiction is required by law, except those jurisdictions,
if any,  in which the  failure to so qualify  would not have a material  adverse
effect on the Purchased Assets or the Business or in Seller's ability to perform
its  covenants  and  commitments  hereunder  and  to  otherwise  consummate  the
Transaction in the manner and to the extent contemplated hereby.

                                       9
<PAGE>
                  3.02 Authorization . Seller has all requisite  corporate power
and  authority  to enter  into and  perform  all of its  obligations  under this
Agreement and to consummate the transactions  contemplated hereby. The execution
and delivery of this Agreement by Seller and the consummation and performance by
Seller of the transactions  contemplated hereby have been duly authorized by all
necessary  corporate action on the part of Seller.  This Agreement has been duly
executed and delivered by Seller and  constitutes  the legal,  valid and binding
obligation of Seller and is enforceable  in accordance  with its terms except as
enforceability  may be subject  to (i) any  applicable  bankruptcy,  insolvency,
reorganization or other law relating to or affecting creditors' rights generally
and (ii) general principles of equity (regardless of whether such enforceability
is considered in a proceeding in equity or at law).

                  3.03 No Breach or  Violation . (a) Neither the  execution  and
delivery of this Agreement by Seller nor the  consummation  of the  transactions
contemplated  hereby to be performed by Seller will (i) violate or conflict with
any  provision  of the  Certificate  of  Incorporation  or Bylaws of Seller,  as
currently in effect,  or (ii) violate or conflict with any provision of any law,
rule,  regulation,  order,  permit,  certificate,  writ,  judgment,  injunction,
decree, determination, award or other decision of any Governmental Entity, other
regulatory or  self-regulatory  body or association  or arbitrator  binding upon
Seller or any of its properties, except where such violations or conflicts would
not in the aggregate  have a material  adverse  effect on the  Business,  or the
Purchased  Assets or on the  ability of Seller to  consummate  the  transactions
contemplated hereby.

                  (b) Neither the execution  and delivery of this  Agreement nor
the  consummation  of the  transactions  contemplated  hereby to be performed by
Seller  will  result in a breach of or  constitute  a default (or with notice or
lapse of time or both result in a breach of or constitute a default)  under,  or
give rise to a right of termination, cancellation, acceleration or repurchase of
any obligation or a right of first refusal with respect to any material property
or asset or a loss of a material benefit or the imposition of a material penalty
under, any of the terms, conditions or provisions of

                           (i) any mortgage, indenture, loan or credit agreement
                  or any other agreement or instrument  evidencing  indebtedness
                  for money  borrowed to which  Seller is a party or by which it
                  or any of its properties is bound or affected,  or pursuant to
                  which  Seller has  guaranteed  the  indebtedness  or preferred
                  stock of any person or entity, or

                           (ii) any lease,  license,  tariff,  contract or other
                  agreement or instrument to which Seller is a party or by which
                  it or any of its  properties  is bound or affected,  except in
                  the case of each of clauses (i) and (ii) above,

                                       10
<PAGE>
                                     (x)  for  any  such   breaches,   defaults,
                          rights,  losses  or  penalties  that  do  not  have  a
                          material adverse effect on the Purchased Assets or the
                          business, financial condition or results of operations
                          of Seller or on the  ability  of Seller to  consummate
                          the transactions contemplated hereby, and

                                     (y) for such third  party  consents as will
                          be obtained prior to the Closing.

                  (c)  Neither  the  execution  and  delivery  by Seller of this
Agreement nor the  consummation of the  transactions  contemplated  hereby to be
performed by Seller will result in, or require,  the creation or  imposition  of
any mortgage,  deed of trust, pledge, lien, security interest or other charge or
encumbrance of any nature upon or with respect to any of the Purchased Assets.

                  3.04 Consents.  No consent,  approval,  order,  certificate or
authorization of, or registration,  declaration or filing with, any Governmental
Entity is required by or with respect to Seller in connection with the execution
and delivery of this  Agreement by Seller or the  consummation  by Seller of the
transactions contemplated hereby.

                  3.05 Contracts and Agreements.  (a) Before the Closing, Seller
will  provide  Buyer  access to and the right to copy all the  Contracts  during
normal business hours.

                  (b) Seller has  complied  in all  material  respects  with the
provisions  of all the  Contracts.  Seller is not in material  breach or default
under any Contract.  The  Contracts are in full force and effect and  constitute
legal,  valid and  binding  obligations  of the  respective  parties  thereto in
accordance with their terms.  There has been no amendment or modification of any
of the Contracts, except such amendments that have been delivered to Buyer.

                  3.06 Trademarks and Copyrights . SCHEDULE 2.02(B) sets forth a
complete and accurate list of each trademark, trade name, and each trademark and
trade  name  registration  or  application,   and  copyright   registration  and
application for copyright registration,  and each license or licensing agreement
for each trademark and copyright  license,  held or employed by Seller or any of
its subsidiaries  relating solely and exclusively to the Purchased Assets or the
Business (each such trademark, trade name, copyright, application and license or
licensing agreement hereafter referred to as the "Trademarks and Licenses").  To
Seller's  knowledge,  the use of the  Trademarks  and Licenses does not conflict
with,  infringe  upon or  violate  any  proprietary  right of any other  person,
corporation or other entity. There are no outstanding or, to Seller's knowledge,
threatened  proceedings or  disagreements  which  challenge the rights of Seller
with respect to the Trademarks and Licenses.

                                       11
<PAGE>
                  3.07  Patents  and  Know-How.  SCHEDULE  2.02(A)  sets forth a
complete  and  accurate  list of each patent,  patent  application  and docketed
invention,  by date and germane case or docket number and country of origin, and
each license or licensing agreement,  by date, term and the parties thereto, for
each patent, patent application,  invention,  trade-secret,  rights to know-how,
processes,  computer  programs or use of technology,  held or employed by Seller
and any of its  subsidiaries  relating  solely and  exclusively to the Purchased
Assets or the  Business  (each  such  patent,  patent  application,  license  or
licensing   agreement  listed  thereon   hereinafter  termed  the  "Patents  and
Licenses"). Except as set forth on SCHEDULE 2.02(A), with respect to the Patents
and Licenses and with respect to all other technology, processes, trade secrets,
methods, operating techniques, know-how, specifications, drawings, designs, chip
designs, mask works, inventions,  discoveries and engineering  information,  and
other  technical data and  information  and technology of Seller relating solely
and exclusively to the Business ("Seller's Technology"),  to Seller's knowledge,
the use of the  Patents  and  Licenses  and the  Seller's  Technology  does  not
conflict  with,  infringe  upon or violate any patent,  patent  license,  patent
application,  or any pending application  relating thereto, or any trade secret,
know-how, programs or processes of any third person, entity or corporation.

                  3.08 Title. Seller has good and marketable title to all of the
Purchased  Assets to be assigned by it to the Buyer,  tangible  and  intangible,
free and clear of all mortgages, liens, pledges, charges and encumbrances of any
nature  whatsoever  except for those  liabilities  which are being  specifically
assumed by Buyer.

                  3.09 Reserved.

                  3.10 Software.  Except as set forth in SCHEDULE  2.02(D),  the
Software  constitutes all necessary  proprietary  computer  programs,  firmware,
computer data bases and related  documentation  used solely and exclusively with
respect  to the use and  operation  of the  Encompass  Systems  and Soil  Sentry
Systems.  The Software does not include,  and this representation does not apply
to, software used in other aspects of Seller's business that may also be used in
connection with the Business,  such as Windows NT software,  accounting software
and  other  software  of  general  applicability.  As a  courtesy,  and  without
representation or warranty, Seller shall provide Buyer a list of software Seller
believes is necessary for the operation of the Business but that is not included
in the Software.  All Software used in the operation of the Encompass Systems is
Year 2000  Compliant,  and the Software  used in the Soil Sentry  Systems is not
Year 2000 Compliant.

                  3.11  Customers  and  Suppliers.  A list of all  customers and
suppliers of the Business is set forth on SCHEDULE 3.11.

                  3.12  Taxes.  There are no  federal,  state or local tax liens
upon any of the Purchased Assets.

                  3.13 Employee Matters.  SCHEDULE 3.13 hereto is a complete and
correct  list of all  personnel  employed  by  Seller  in the  operation  of the
Business   including  each   employee's   name,   title  or  position,   current
compensation,  years of service, and Social Security Number. Except as set forth
in SCHEDULE  3.13,  all of the personnel  employed by Seller in the Business are
"at  will"  employees.  SCHEDULE  3.13  contains  a written  description  of all
director,  officer and  employee  retirement,  welfare or other  benefit  plans,
agreements,  practices,  programs or arrangements  available to employees of the
Business ("Employee Benefit Plans").

                                       12
<PAGE>
                  3.14 Litigation. Except as disclosed in SCHEDULE 3.14 hereto:

                  (a) There is no claim, action, suit, proceeding,  arbitration,
investigation or inquiry now pending or, to the knowledge of Seller,  threatened
against, relating to or affecting any of the Purchased Assets or the Business or
that  questions  the  validity of this  Agreement  or affects  the  transactions
contemplated  herein; nor is there any basis for any such claim,  action,  suit,
proceeding, arbitration, investigation or inquiry.

                  (b)  Neither  Seller  nor any of its  officers,  directors  or
employees has been  permanently or temporarily  enjoined or prohibited by order,
judgment  or  decree  of  any   Governmental   Entity,   other   regulatory   or
self-regulatory  body  or  association,   or  arbitrator  from  engaging  in  or
continuing any conduct or practice in connection with the Business.

                  (c) There is not in existence any order, judgment or decree of
any Governmental Entity, other regulatory or self-regulatory body or association
or arbitrator  enjoining or prohibiting  Seller from taking, or requiring Seller
to take,  any  action of any kind which the  Purchased  Assets or  Business  are
subject or bound.

                  3.15  Brokers  and  Finders.  No broker or finder has acted on
behalf  of  Seller  in  connection  with  this  Agreement  and the  transactions
contemplated  hereby.  No person has a valid claim for a  brokerage  commission,
finder's  fee or other  like  payment  against  Seller  in  connection  with the
transactions contemplated by this Agreement.

                  3.16 Compliance  with Laws.  Seller has not received notice of
any noncompliance or alleged  noncompliance with any Legal Requirement  relating
or applicable to the Purchased  Assets or to the operation of the Business,  the
existence or  enforcement  of which would have a material  adverse effect on the
Buyer's  ability to operate  them on the same basis as currently  conducted  and
operated or which would  require the  payment of refunds,  fines,  penalties  or
restitution in respect of matters occurring prior to the Closing.

                  3.17 Permits. SCHEDULE 3.17 sets forth all permits,  licenses,
certificates,  authorizations,  orders and approvals granted by any Governmental
Entity to Seller solely and exclusively in connection with the ownership, use or
operation  of the  Purchased  Assets and the  operation  of the  Business in the
manner heretofore operated by Seller, other than sales tax permits, certificates
of occupancy, and certificates of corporate authority (the "Scheduled Permits").
Except as set forth on SCHEDULE  3.17,  the Scheduled  Permits are in full force
and effect,  all fees and other  payments due and owing in  connection  with the
Scheduled  Permits have been paid in full, and there are no unpaid fees or other
payments  that  could  cause the  lapse or  revocation  of any of the  Scheduled
Permits.

                                       13
<PAGE>
                  3.18  Bills and  Invoices.  Except for items  included  in the
Assumed Liabilities, all bills and other payments due and payable by Seller with
respect to the  Purchased  Assets and the Business  have been or will be paid in
full in the ordinary course of business, and no labor, material or services have
been provided or performed  with respect to the  Purchased  Assets that have not
been or will not be paid in full.

                  3.19 Inventories.  Set forth on SCHEDULE 2.02(I) is a complete
list of the  inventories of Seller  included as a part of the Purchased  Assets,
including a description  thereof.  All  inventories  are of a nature and quality
equal to the inventory  historically  held by and sold by Seller in the ordinary
course of the Business.

                  3.20  Untrue  Statements.  This  Agreement  and the  exhibits,
schedules  and  appendices  hereto,  and the financial  statements  furnished by
Seller  or  any  of  its   affiliates  or   representatives   to  Buyer  or  its
representatives  pursuant hereto or in connection  herewith,  do not include and
will not include any untrue  statement  of a material  fact or omit to state any
material fact necessary to make the statements made herein and therein, in light
of the circumstances in which they are made, not misleading.

                                   ARTICLE IV
                     REPRESENTATIONS AND WARRANTIES OF BUYER

                  Buyer hereby represents and warrants to Seller as follows:

                  4.01 Organization, Good Standing and Corporate Power. Buyer is
a corporation,  duly organized,  validly existing and in good standing under the
laws of Oklahoma and has all requisite corporate power and authority to carry on
its business as now being conducted.

                  4.02  Authorization.  (a)  Buyer has all  requisite  corporate
power and authority to enter into and perform all of its obligations  under this
Agreement and to consummate the transactions  contemplated hereby. The execution
and delivery of this Agreement by Buyer and the  consummation and performance by
Buyer of the transactions  contemplated  hereby have been duly authorized by all
necessary  corporate  action on the part of Buyer.  This Agreement has been duly
executed and  delivered by Buyer and  constitutes  the legal,  valid and binding
obligation of Buyer,  enforceable  against  Buyer in  accordance  with its terms
except  as  enforceability  may be  subject  to (i) any  applicable  bankruptcy,
insolvency,  reorganization  or other law  relating to or  affecting  creditors'
rights  generally and (ii) general  principles of equity  (regardless of whether
such enforceability is considered in a proceeding in equity or at law).

                                       14
<PAGE>
                  4.03 No Breach or  Violation.  (a) Neither the  execution  and
delivery of this  Agreement by Buyer nor the  consummation  of the  transactions
contemplated  hereby to be performed by Buyer will (i) violate or conflict  with
any  provision  of the  Certificate  of  Incorporation  or Bylaws  of Buyer,  as
currently in effect,  or (ii) violate or conflict with any provision of any law,
rule,  regulation,  order,  permit,  certificate,  writ,  judgment,  injunction,
decree, determination, award or other decision of any Governmental Entity, other
regulatory or  self-regulatory  body or association  or arbitrator  binding upon
Buyer or any of its properties,  except where such violations or conflicts would
not in the aggregate have a material  adverse effect on the business,  financial
condition or properties  of Buyer or on the ability of Buyer to  consummate  the
transactions  contemplated  hereby and except for violations that will be cured,
waived or terminated prior to the Closing.

                  (b) No  consent,  approval,  order  or  authorization  of,  or
registration, declaration or filing with, any Governmental Entity is required by
or with respect to Buyer in  connection  with the execution and delivery of this
Agreement by Buyer or the consummation by Buyer of the transactions contemplated
hereby other than such filings or  registrations  which,  if not made,  and such
authorizations, consents or approvals which, if not received, would not have any
material adverse effect on the business,  financial condition,  or properties of
Buyer or on the ability of Buyer to  consummate  the  transactions  contemplated
hereby.

                  4.04  Brokers  and  Finders.  No broker or finder has acted on
behalf  of  Buyer  in  connection  with  this  Agreement  and  the  transactions
contemplated  hereby.  No person has a valid claim for a  brokerage  commission,
finder's  fee or  other  like  payment  against  Buyer  in  connection  with the
transactions contemplated by this Agreement.

                                    ARTICLE V
                               COVENANTS OF SELLER

                  5.01 Confidentiality.  Seller acknowledges that Buyer would be
irreparably damaged if confidential  information concerning the Purchased Assets
or Buyer were  disclosed to or utilized by any person to the detriment of Buyer.
Consequently,  during the five-year  period  immediately  following the Closing,
Seller shall not, at any time directly or indirectly,  without the prior written
consent  of Buyer,  make use of or  divulge,  or permit  any of its  affiliates,
employees or agents to make use of or divulge,  any  information  concerning the
Purchased Assets, the Business,  or the financial  condition or other affairs of
Buyer  that  could  be  used  to  the  detriment  of  Buyer,  including  without
limitation, customer information,  Patents and Licenses and Seller=s Technology,
except to the extent Seller  reasonably deems disclosure of any such items to be
necessary or prudent under applicable  securities laws, or if required by law or
in order to  preserve  or enforce  its rights  under  this  Agreement.  Seller's
obligations   hereunder  shall  not  apply  with  respect  to  any  confidential
information  which (i) is disclosed in a printed  publication which is generally
available to the public or becomes publicly known through no wrongful act on the
part  of  Seller,  (ii)  becomes  known  to  Seller  through  disclosure  from a
third-party  source which, after reasonable  inquiry,  Seller believes that such
source has a right to disclose  without a breach of any contractual or fiduciary
obligation  by such  source to Buyer,  or (iii) is  disclosed  with the  written
approval of Buyer.

                  5.02  Covenant  Not to  Compete.  (a)  Except  as set forth in
Section  5.02(d) below,  Seller agrees that it will not, and will cause Seller=s
subsidiaries  not  to,  engage  or  participate,   directly  or  indirectly,  as
principal, agent, employee,  employer,  consultant or in any other individual or
representative  capacity  whatever,  in the  conduct  or  management  of, or own
(legally or beneficially), or have the right or option to acquire, any direct or
indirect interest in any business which engages,  directly or indirectly, in any
business  competitive with the Business,  in the United States and Europe, for a
period of five (5) years following the Closing Date.

                                       15
<PAGE>
                  (b) Seller  agrees  that the  covenants  set forth  herein are
appropriate  and reasonable when considered in light of the nature and extent of
the Business and Purchased  Assets acquired by Buyer  hereunder,  which includes
the  goodwill  of  the  Business.  Seller  acknowledges  that  (i)  Buyer  has a
legitimate  interest in protecting  the Business and Purchased  Assets  acquired
from  Seller,  (ii) the  covenants  set forth herein are not  oppressive  to the
Seller and contain reasonable  limitations as to time, scope,  geographical area
and  activity,  (iii) the  covenants  do not harm in any manner  whatsoever  the
public  interest,  (iv) the Seller has  received  and will  receive  substantial
consideration for agreeing to such covenants, (v) the Seller is agreeing to such
covenants  in order,  among  other  things,  to induce  Buyer to enter into this
Agreement and (vi) Seller will derive substantial benefits from the consummation
of the transactions  contemplated by this Agreement,  including, but not limited
to, the  payment of the  consideration  for the  Purchased  Assets and of future
royalties in accordance with this Agreement.

                  (c) In the event Seller violates the foregoing covenant not to
compete or any other  covenants set forth in this Agreement  (collectively,  the
"Covenants"),  then,  in addition to any other  rights and  remedies  available,
Buyer shall have the right and remedy to have the applicable Covenant provisions
specifically  enforced  by any  court  of  competent  jurisdiction  by way of an
injunction or other legal equitable  relief,  it being agreed that any breach of
the  applicable  Covenant  would cause  irreparable  injury to Buyer and damages
would be an inadequate remedy.

                  (d)  Notwithstanding  anything in this  Section 5.02 or in any
other  provision of this Agreement to the contrary,  Seller shall have the right
to use the "Soil Sentry Twelve - X" technology (the  "Technology") at any future
time, as long as Seller does so in strict  accordance with this Section 5.02(d).
Seller can use the  Technology  in  conjunction  with any business  conducted by
Seller  as  long  as  that  business  does  not  involve  in the  monitoring  of
aboveground or underground  storage tanks of alcohol or petroleum based fuels or
oils. Further,  Seller's right to use the Technology shall not entitle Seller to
use the name "Soil Sentry Twelve - X."

                                       16
<PAGE>
                                   ARTICLE VI
                                    RESERVED












                                       16
<PAGE>
                                   ARTICLE VII
                          COVENANTS OF BUYER AND SELLER

                  7.01  Employees of Seller.  Buyer  agrees to offer  employment
only to those  employees  of the  Business  specified  by Buyer on or before the
Closing on SCHEDULE 7.01 (the "Assumed  Employees").  Seller agrees to terminate
the employment of all Assumed Employees effective upon Closing and agrees not to
rehire any Assumed  Employees unless they are either terminated by Buyer or have
been out of Buyer's  employment for a period of at least six (6) months.  Seller
shall retain and perform any and all  obligations  to (i) the Assumed  Employees
incurred prior to the Closing or by reason of such termination of employment and
(ii) all other  employees  employed by Seller in  connection  with the  Business
incurred prior to or after the Closing, including without limitation in the case
of both (i) and (ii)  obligations  pursuant  to any  employment  agreement,  any
severance, bonus, vacation, deferred compensation, stock purchase, stock option,
profit sharing,  pension,  retirement or other employee benefit plan,  policy or
agreement,  or any laws or regulations  governing wages, employee benefit plans,
withholding, plant closings and employee notification.

                  7.02 Further Assurances. Seller and Buyer shall each use their
commercially reasonable efforts to take all actions necessary, proper, or deemed
by them  advisable,  to fulfill  promptly  their  obligations  hereunder  and to
consummate the  transactions  contemplated by this  Agreement.  Seller and Buyer
will coordinate and cooperate with each other in exchanging such information and
supplying  such  reasonable  assistance  as may be  requested  by the  other  in
connection with the foregoing.  From time to time after the Closing, Seller will
at its own expense,  execute and deliver, or cause to be executed and delivered,
such documents to Buyer as Buyer may reasonably  request,  and from time to time
after the  Closing,  Buyer will,  at its own  expense,  execute and deliver such
documents  to  Seller  as  Seller  may  reasonably  request,  in  order  to more
effectively consummate the transactions contemplated by this Agreement.

                                  ARTICLE VIII
                                    RESERVED

                                   ARTICLE IX
                                    RESERVED

                                    ARTICLE X
                                    RESERVED

                                   ARTICLE XI
                              AMENDMENTS AND WAIVER

                  11.01  Amendment.  This Agreement may not be amended except by
an instrument in writing signed on behalf of each of the parties hereto.

                                       17
<PAGE>
                  11.02 Waiver.  Any term or provision of this  Agreement may be
waived  in  writing  at any time by Buyer,  if it is  entitled  to the  benefits
thereof, or by Seller, if it is entitled to the benefits thereof.

                                   ARTICLE XII
                           OTHER AGREEMENTS; SURVIVAL
                        OF REPRESENTATIONS AND WARRANTIES

                  12.01  Confidentiality.  Except as may be  required  to comply
with applicable law and regulations or to obtain required  regulatory  approvals
to consummate this transaction,  whether state, federal or foreign,  each of the
parties  hereto  will  use its best  efforts  to keep  confidential  any and all
information  relating to this  transaction  and to one another and will instruct
its  officers,  employees  and  other  representatives  having  access  to  such
information of such obligation of confidentiality. In the event the transactions
contemplated herein are not consummated, each of the parties hereto shall return
all  documents,  including any copies  thereof,  to the party which provided the
same.

                  12.02 Public  Announcements.  None of the parties  hereto will
make any public announcement  without prior approval of the other, except as may
otherwise be required by law.

                  12.03 Additional Agreements.  Subject to this Agreement,  each
of the parties agrees to use its best efforts to take, or cause to be taken, all
action and to do, or cause to be done, all things necessary, proper or advisable
under  applicable  laws and  regulations  to consummate  and make  effective the
transactions  contemplated by this  Agreement.  If at any time after the Closing
any further  action is  necessary or desirable to carry out the purposes of this
Agreement, the proper officers and directors of each corporation that is a party
to this Agreement will take all such necessary action.

                  12.04 Available  Remedies.  Each party expressly  agrees that,
consistent  with its  intention  and  agreement to be bound by the terms of this
Agreement and to consummate the transactions  contemplated hereby,  subject only
to the  performance  or  satisfaction  of  conditions  precedent,  the remedy of
specific  performance shall be available to a non-breaching  and  non-defaulting
party to enforce  performance  of this  Agreement by a breaching  or  defaulting
party, including, without limitation, to require the consummation of the Closing
pursuant to Section 2.01.

                                       18
<PAGE>
                  12.05   Survival   of    Representations    and    Warranties;
Indemnification.  All representations,  warranties, covenants and obligations in
this Agreement,  and in the schedules  hereto,  will survive the Closing and the
consummation of the transactions  contemplated hereby;  provided,  however, that
the  representations  and  warranties of Seller  contained in Section 3.12 shall
survive  until  90 days  after  the  date on  which  the  applicable  period  on
limitation  of  assessment  of tax  has  expired,  and the  representations  and
warranties of Seller contained  elsewhere in Article III and the representations
of Buyer  contained  in  Article  IV shall  survive  for a period of six  months
following Closing. No claim for the recovery of indemnifiable damages based upon
the inaccuracy of the Article III or Article IV  representations  and warranties
may be asserted by a party after such  representations  and warranties  shall be
thus  extinguished;  provided,  however,  that claims first  asserted in writing
within  the  applicable  period  shall not be  barred.  The right to  payment of
damages or other remedy based on such  representations,  warranties,  covenants,
and obligations will not be affected by any investigation conducted with respect
to, or any  knowledge  acquired  (or  capable  of being  acquired)  at any time,
whether  before or after the  execution  and  delivery of this  Agreement or the
Closing,  with respect to the accuracy or inaccuracy of or compliance  with, any
such  representation,  warranty,  covenant,  or  obligation.  The  waiver of any
condition  based on the accuracy of any  representation  or warranty,  or on the
performance of or compliance  with any covenant or  obligation,  will not affect
the right to indemnification,  payment of damages, or other remedy based on such
representations, warranties, covenants, and obligations.

                  12.06  Actions of the Parties  after the Closing.  The parties
hereto  agree that after the  Closing,  they will take the actions  described in
this Section 12.06.

                  (a)  Seller  acknowledge  and  agree  that  from and after the
Closing,  Buyer will be entitled to originals of all title  documents and copies
of all other documents, books, records (including tax records),  agreements, and
financial data of any sort relating to the Business and Purchased Assets.

                  (b) In the event  and for so long as (i)  Seller is a party to
the BP  Litigation  or (ii) either  party  actively is  contesting  or defending
against any action, suit, proceeding, hearing, investigation, charge, complaint,
claim, or demand in connection with (A) any transaction  contemplated under this
Agreement or (B) any fact, situation, circumstance, status, condition, activity,
practice,  plan,  occurrence,  event,  incident,  action,  failure  to  act,  or
transaction  on or prior to the  Closing  Date  involving  the  Business  or the
Purchased  Assets,  the other  party will to the extent  reasonably  practicable
cooperate with the contesting or defending  party and its counsel in the contest
or defense, make available its personnel,  and provide such testimony and access
to its books and records as shall be necessary in connection with the contest or
defense,  all at the sole cost and expense of the contesting or defending party.
In particular,  and without  limiting the preceding  sentence,  Buyer shall make
available any of the Assumed  Employees,  as reasonably  requested by Seller, in
order to assist Seller in the BP Litigation.  However,  with respect to any such
information as to which the contesting or defending party may reasonably  assert
that the disclosure  pursuant  hereto would waive a privilege,  the parties will
use their reasonable efforts to develop procedures to maintain such privilege.

                  (c)  Seller  will not  take any  action  that is  designed  or
intended  to have the effect of  discouraging  any lessor,  licensor,  customer,
supplier,  or other business associate of the Business from maintaining the same
business  relationships  with Buyer after the Closing as it maintained  with the
Seller  prior to the  Closing.  The  Seller  will refer all  customer  inquiries
relating to the Business to Buyer from and after the Closing.

                                       19
<PAGE>
                  (d) Promptly after Closing,  Seller shall use its commercially
reasonable efforts to obtain the consents necessary, if any, to convey, transfer
and assign to Buyer the Contracts.  Without limiting the obligation set forth in
the immediately preceding sentence, if any consent necessary to convey, transfer
and assign the Contracts has not been obtained prior to the Closing Date, Seller
shall use its commercially reasonable efforts to afford Buyer the benefits under
each such Contract and Seller's  protection from the obligations under each such
Contract,  to the extent  Seller may do so without  breaching or  violating  the
terms of any such Contract.

                  (e) It is the parties' intent that all of the Purchased Assets
be conveyed to Buyer at the Closing.  Accordingly,  if either  party  determines
that less than all of the Purchased  Assets have been  conveyed  (whether due to
the failure to identify all of the Purchased  Assets at Closing,  the failure to
include all Purchased  Assets in any applicable  assignment or bill of sale, the
failure to obtain all required consents to assignment or otherwise),  such party
shall  promptly  notify  the  other of such fact and the  parties  will take all
appropriate  action  and  execute  any  additional  documents,   instruments  or
conveyances  of any kind  which  may be  reasonably  necessary  to carry out the
foregoing intent.

                                  ARTICLE XIII
                                  MISCELLANEOUS

                  13.01  Severability.  If any  term,  provision,  condition  or
covenant  of  this  Agreement  or  the  application  thereof  to  any  party  or
circumstances   shall  be  held  to  be  unenforceable  to  any  extent  in  any
jurisdiction,  then the remainder of this Agreement and the  application of such
term,  provision,  condition or covenant in any other jurisdiction or to persons
or  circumstances  other than those as to whom or which it is held to be invalid
or  unenforceable,  shall not be  affected  thereby,  and each term,  provision,
condition and covenant of this Agreement  shall be valid and  enforceable to the
fullest extent permitted by law.

                  13.02  Expenses.  Except as otherwise  provided  herein,  each
party hereto will pay its own costs and  expenses  incurred in  connection  with
this Agreement and the  transactions  contemplated  hereby.  Seller will pay all
state and local real estate transfer, documentary, stamp and other similar Taxes
arising from the transfer of the real  property  included  within the  Purchased
Assets.  In  addition,  Seller  agree  that  the  purchase  price  includes  all
applicable state and local sales, use, transfer,  retailer  occupation and other
similar Taxes due with respect to the transfer of the Purchased Assets.

                  13.03 Notices. All notices and other communications  hereunder
shall be in  writing  and  shall  be  deemed  to have  been  given if  delivered
personally or sent by telex,  facsimile  transmission,  a nationally  recognized
overnight  delivery  service or  registered  or certified  mail (return  receipt
requested),  postage prepaid,  to the parties to this Agreement at the following
addresses  or at such other  address for a party as shall be  specified  by like
notice:

                                       20
<PAGE>
           If to Buyer:          National Environmental Service Co.
                                 12331 East 60th Street
                                 Tulsa, Oklahoma 74133-3621
                                 Telefax No.:     (918) 250-1418
                                 Attention:  Eddy Patterson

           with a copy to:       Conner & Winters, A Professional Corporation
                                 15 East 5th Street, Suite 3700
                                 Tulsa, Oklahoma 74103
                                 Telefax No.: (918) 596-8548
                                 Attention:  Lynnwood R. Moore, Jr.

           If to Seller:         Arizona Instrument Corporation
                                 4114 East Wood Street
                                 Phoenix, Arizona 85040
                                 Telefax No.:
                                 Attention:  George G. Hays

           with a copy to:       Quarles & Brady
                                 One East Camelback, Suite 400
                                 Phoenix, AZ  85012
                                 Telefax No.: (602) 230-5598
                                 Attention: Robert S. Bornhoft


All such notices and communications shall be deemed to have been received on the
date of delivery or on the third business day after the mailing thereof.

                  13.04 Time. Time is of the essence of this Agreement.

                  13.05  Entire   Agreement.   This  Agreement   (including  the
schedules,  documents and instruments referred to herein) constitutes the entire
agreement  between the parties  with  respect to the subject  matter  hereof and
supersedes all prior agreements and undertakings,  written and oral,  including,
but not limited to, the letter of intent  between  the  parties,  dated April 8,
1999;  provided,  however,  this  Agreement  shall  not  constitute  a waiver of
termination of any right a party may have against the other party for any breach
of the binding provisions of such letter of intent prior to the Closing.

                                       21
<PAGE>
                  13.06  Binding  Effect;  Benefits.  This  Agreement  shall  be
binding upon and inure to the benefit of the parties to this Agreement and their
respective  successors and permitted  assigns.  Nothing  expressed or implied in
this  Agreement  is intended to or shall be  construed  to give any person other
than the parties to this Agreement or their  respective  successors or permitted
assigns  any legal or  equitable  right,  remedy or claim under or in respect of
this  Agreement,  it being the intention of the parties to this  Agreement  that
this  Agreement  shall be for the sole and exclusive  benefit of such parties or
such successors or assigns and for the benefit of no other person.

                  13.07  Assignment.  Neither  this  Agreement  nor  any  right,
remedy,  obligation or liability  arising hereunder or by reason hereof shall be
assignable by any party to this Agreement  without the prior written  consent of
the other parties.

                  13.08  Applicable Law. This Agreement shall be governed by and
construed in  accordance  with the laws of the State of Oklahoma  applicable  to
contracts  made and to be  performed  within that State,  without  regard to the
principles of conflicts of laws thereof.

                  13.09 Article and Section Headings.  The article,  section and
other headings  contained in this Agreement are for reference  purposes only and
shall not affect the meaning or interpretation of this Agreement.

                  13.10  Counterparts.  This  Agreement  may be  executed in any
number of counterparts,  each of which shall be deemed to be an original and all
of which together shall be deemed to be a single agreement.

                  13.11 Knowledge.  Whenever the phrase Ato Seller's  knowledge@
or similar  such  words are used in this  Agreement,  the phrase  shall mean the
current,  actual knowledge of George G. Hays,  President of Seller, with respect
to the matter as of the Closing Date, without any investigation.

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

                                      NATIONAL ENVIRONMENTAL
                                          SERVICE CO.

                                     By: /s/ Albert A. McCutchan
                                             Albert A. McCutchan,
                                             Executive Vice President


                                     ARIZONA INSTRUMENT
                                         CORPORATION

                                     By: /s/ George G. Hays
                                             George G. Hays, President

                                       22
<PAGE>
Following is a list  identifying  the exhibits and  schedules to this  Agreement
which are not being  filed with the  Securities  and  Exchange  Commission.  The
Registrant  agrees  to  furnish  supplementally  a copy  of  such  exhibits  and
schedules to the Securities and Exchange Commission upon request.

Exhibit A - Form of Assignment and Bill of Sale
Exhibit B - Legal Opinion of Sellers' Counsel
Exhibit C - Legal Opinion of Buyer=s Counsel

SCHEDULE 2.02(A) -- Patents and Know-How
SCHEDULE 2.02(B) -- Trademarks and Copyrights
SCHEDULE 2.02(C) -- Equipment
SCHEDULE 2.02(D) -- Software
SCHEDULE 2.02(F) -- Contracts
SCHEDULE 2.02(H) -- Accounts Receivable
SCHEDULE 2.02(I) -- Inventory
SCHEDULE 2.04 -- Assumed Liabilities
SCHEDULE 2.06 -- Allocation of Purchase Price
SCHEDULE 3.08 -- Leases and Other Agreements
SCHEDULE 3.13 -- Employees and Employee Benefit Plans
SCHEDULE 3.14 -- Litigation
SCHEDULE 3.17 -- Scheduled Permits
SCHEDULE 7.01 -- Assumed Employees


Exhibit 3.1

                              AMENDED AND RESTATED
                          CERTIFICATE OF INCORPORATION
                                       OF
                         ARIZONA INSTRUMENT CORPORATION

                  1. Name.  The name of the  Corporation  is Arizona  Instrument
Corporation.

                  2.  Registered  Office and Agent.  The name and address of the
registered  office and registered  agent of the  Corporation is The  Corporation
Trust Company,  Corporation Trust Center,  1209 Orange Street,  Wilmington,  New
Castle County, Delaware.

                  3.  Purpose.   The  purpose  for  which  this  Corporation  is
organized  is  the   transaction  of  any  or  all  lawful  activity  for  which
corporations may be organized under the General Corporation Law of Delaware,  as
it may be amended from time to time ("GCL").

                  4. Initial  Business.  The  Corporation  initially  intends to
conduct  this  business  of  developing,  manufacturing  and  marketing  various
moisture and other test control equipment.

                  5.  Authorized  Capital.  The total  number of shares of stock
which the  Corporation  shall  have  authority  to issue is  11,000,000  shares,
consisting of 10,000,000 shares of Common Stock, having a par value of $0.01 per
share (the "Common Stock") and 1,000,000 shares of Preferred Stock, having a par
value of $.01 (the "Preferred Stock").

                           The Board of  Directors  is  authorized,  subject  to
limitations  prescribed  by law and the  provisions of Article 5, to provide for
the  issuance  of the  shares  of  Preferred  Stock in  series,  and by filing a
certificate  pursuant  to the  applicable  law  of the  State  of  Delaware,  to
establish  from time to time the  number of shares to be  included  in each such
series, and to fix the designation, powers, preferences and rights of the shares
of each such series and the qualifications, limitations or restrictions thereof.

                           The  authority  of the  Board  with  respect  to each
series shall include, but not be limited to, determination of the following:

                           (a) The number of shares constituting that series and
the distinctive designation of that series;

                           (b) The  dividend  rate on the shares of that series,
whether dividends shall be cumulative,  and if so, from which date or dates, and
the relative  rights of  priority,  if any, of payment of dividends on shares of
that series;

                           (c) Whether that series shall have voting rights,  in
addition to the voting  rights  provided  by law,  and, if so, the terms of such
voting rights;
<PAGE>
                           (d)  Whether  that  series   shall  have   conversion
privileges, and, if so, the terms and conditions of such conversion rate in such
events as the Board of Directors shall determine.

                           (e) Whether or not the shares of that series shall be
redeemable,  and, if so, the terms and conditions of such redemption,  including
the date or dates upon or after which they shall be  redeemable,  and the amount
per share payable in case of redemption,  which amount may vary under  different
conditions and at different redemption dates;

                           (f) Whether that series shall have a sinking fund for
the  redemption or purchase of shares of that series,  and, if so, the terms and
amount of such sinking fund;

                           (g) the  rights of the  shares of that  series in the
event of voluntary or involuntary liquidation,  dissolution or winding up of the
Corporation,  and the relative rights of priority,  if any, of payment of shares
on that series; and

                           (h)  Any  other  relative  rights,   preferences  and
limitations of that series.

                  6.  Classifications  and Terms of Directors.  The business and
affairs of the  Corporation  shall be managed by or under the  direction  of the
Board of Directors  consisting  of not less than two directors nor more than ten
directors,  the exact number of directors to be determined  from time to time by
resolution  adopted by the Board of Directors.  The  directors  shall be divided
into three classes, designated Class I, Class II and Class III. Each class shall
consist,  as nearly as may be  possible,  of  one-third  of the total  number of
directors  constituting the entire Board of Directors.  The terms of the initial
Class I directors  shall  terminate  on the date of the 1989  annual  meeting of
stockholders;  the term of the initial Class II directors shall terminate on the
date of the 1990  annual  meeting of  stockholders;  and the term of the initial
Class III directors  shall  terminate on the date of the 1991 annual  meeting of
stockholders.  At  each  annual  meeting  of  stockholders  beginning  in  1989,
successors to the class of directors  whose terms expires at that annual meeting
shall be elected for a three-year  term.  If the number of directors is changed,
any increase or decrease shall be apportioned  among the class so as to maintain
the number of  directors  in each  class as nearly  equal as  possible,  and any
additional  directors of any class elected to fill a vacancy  resulting  from an
increase in such class shall hold office for a term that shall coincide with the
remaining  terms of that class,  but in no case will a decrease in the number of
directors  shorten the term of any  incumbent  director.  A director  shall hold
office until the annual meeting for the year in which his term expires and until
his successor  shall be elected and shall qualify,  subject,  however,  to prior
death,  resignation,  retirement,  disqualification  or removal from office. Any
vacancy  on the  Board of  Directors,  howsoever  resulting  (including  without
limitation  newly  created  directorships)  may be filled by a  majority  of the
directors  then in office,  even if less than a quorum,  or by a sole  remaining
director.  Any director  elected to fill a vacancy  shall hold office for a term
that shall coincide with the term of the class to which such director shall have
been elected.

<PAGE>
                           Notwithstanding  the foregoing,  whenever the holders
of any  one  or  more  classes  or  series  of  Preferred  Stock  issued  by the
Corporation shall have the right, voting separately by class or series, to elect
directors at an annual or special meeting of stockholders, the election, term of
office,  filling of vacancies and other features of such directorships  shall be
governed by the terms of this  Certificate of Incorporation or the resolution or
resolutions  adopted  by  the  Board  of  Directors  pursuant  to  Article  Five
applicable  thereto,  and such  directors  so elected  shall not be divided into
classes pursuant to this Article Six unless expressly provided by such terms.

                  7. Removal of Directors. Subject to the rights, if any, of the
holders  of  shares  of  Preferred  Stock  then  outstanding,  any or all of the
directors of the  Corporation  may be removed  from office at any time,  with or
without cause and only by the  affirmative  vote of the holders of a majority of
the outstanding shares of the Corporation then entitled to vote generally in the
election of directors, considered for purposes of this Article 7 as one class.

                  8. Election of Directors.  Elections of directors at an annual
or special meeting of stockholders  shall be by written ballot unless the Bylaws
of the  Corporation  shall  otherwise  provide.  Advance  notice of  stockholder
nominations  for the election of directors shall be given in the manner provided
by the Bylaws of the Corporation.

                  9. Action by Consent of  Stockholder.  Any action  required or
permitted to be taken by the stockholders  must be effected at a duly called and
noticed annual or special meeting of such  stockholders  and may not be effected
by any consent in writing by such stockholders.

                  10. Special Meetings.  Special meetings of the stockholders of
the  Corporation  for any purpose or purposes  may be called at any time only by
the President,  or the Board of Directors pursuant to a resolution approved by a
majority  of the whole  Board of  Directors,  or at the  request  in  writing of
shareholders  owning  10% or more in  amount of the  capital  stock  issued  and
outstanding and entitled to vote.


                  11. Special Voting Requirements.

                  (a) Except as set forth in Section (b) of this Article 11, the
affirmative  vote  of  the  holders  of  75% of  the  outstanding  stock  of the
Corporation entitled to vote shall be required for:

                           (1)  any  merger  or   consolidation   to  which  the
Corporation,  or  any  of  its  subsidiaries,   and  an  Interested  Person  (as
hereinafter defined) are parties;

                           (2) any sale or other disposition by the Corporation,
or any of its  subsidiaries,  of all or  substantially  all of its  assets to an
Interested Person;

<PAGE>
                           (3)  any  purchase  or  other   acquisition   by  the
Corporation,  or any of its  subsidiaries,  of all or  substantially  all of the
assets or stock of an Interested Person; and

                           (4) any other  transactions with an Interested Person
which requires the approval of the  stockholders  of the  Corporation  under the
GCL, as in effect from time to time.

                  (b) The provisions of Section (a) of this Article 11 shall not
be  applicable  to any  transaction  described  therein if such  transaction  is
approved by resolution of the Corporation's Board of Directors,  provided that a
majority of the  members of the Board of  Directors  voting for the  approval of
such transaction are Continuing Directors. The term "Continuing Directors" shall
mean any  member of the Board of  Directors  of the  Corporation  who is not the
Interested Person, and not an affiliate, associate, representative or nominee of
the Interested Person or of such an affiliate or associate,  that is involved in
the relevant  transaction,  and (A) was a member of the Board of Directors prior
to the date that the person,  firm or  corporation,  or any group thereof,  with
whom such  transaction  is proposed,  became an  Interested  Person or (B) whose
initial election as a director of the Corporation succeeds a Continuing Director
or is a newly  created  directorship,  and in either case was  recommended  by a
majority vote of the Continuing Directors then in office.

                  (c) As used in this Article 11, the term  "Interested  Person"
shall mean any person,  firm or  corporation,  or any group  thereof,  acting or
intending  to act in  concert,  including  any  person  directly  or  indirectly
controlling  or  controlled by or under direct or indirect  common  control with
such person, firm or corporation or group, which owns of record or beneficially,
directly  or  indirectly,  five  percent  (5%) or more of any  class  of  voting
securities of the Corporation.

                  12. Indemnification of Officers and Directors.

                  A.  The  Corporation   shall  indemnify  to  the  full  extent
authorized  or permitted by law (as now or hereafter in effect) any person made,
or  threatened  to be made,  a  defendant  or  witness  to any  action,  suit or
proceeding  (whether  civil or criminal or otherwise) by reason of the fact that
he,  his  testator  or  intestate,  is or  was a  director  or  officer  of  the
Corporation by reason of the fact that such director or officer,  at the request
of the Corporation, is or was serving any other corporation,  partnership, joint
venture,  trust,  employee  benefit plan or other  enterprise,  in any capacity.
Nothing  contained  herein shall affect any rights to  indemnification  to which
employees other than directors and officers may be entitled by law. No amendment
or repeal of this  Section A of Article 12 shall  apply to or have any effect on
any right to  indemnification  provided  hereunder  with  respect to any acts or
omissions occurring prior to such amendment or repeal.

                  B. No director of the Corporation  shall be personally  liable
to the Corporation or its  stockholders  for monetary  damages for any breach of
fiduciary duty by such a director as a director.  Notwithstanding  the foregoing
sentence,  a director  shall be liable to the extent  provided by applicable law
(i) for any breach of the director's  duty of loyalty to the  Corporation or its
stockholders,  (ii) for acts or  omissions  not in good  faith or which  involve
intentional  misconduct  or a knowing  violation of the law,  (iii)  pursuant to
Section 174 of the GCL,  or (iv) for any  transaction  from which such  director
derived an improper personal benefit.  No amendment to or repeal of this Section
B of Article  12 shall  apply to or have an effect on the  liability  or alleged
liability of any director of the  Corporation for or with respect to any acts or
omissions of such director occurring prior to such amendment or repeal.

<PAGE>
                  C.  In  furtherance  and  not  in  limitation  of  the  powers
conferred by statute:

                           (i)  the   Corporation   may  purchase  and  maintain
insurance on behalf of any person who is or was a director, officer, employee or
agent of the  Corporation,  or is serving at the request of the Corporation as a
director, officer, employee or agent of another corporation,  partnership, joint
venture,  trust, employee benefit plan or other enterprise against any liability
asserted  against him and incurred by him in any such capacity or arising out if
his  status as such,  whether  or not the  Corporation  would  have the power to
indemnify him against such liability under the provisions of law; and

                           (ii) the Corporation may create a trust fund, grant a
security interest and/or use other means (including, without limitation, letters
of credit,  surety bonds and/or other  similar  arrangements),  as well as enter
into  contracts  providing  indemnification  to the full  extent  authorized  or
permitted by law and including as part thereof provisions with respect to any or
all of the foregoing to ensure the payment such amounts as may become  necessary
to effect indemnification as provided therein, or elsewhere.

                  13. Bylaws. In furtherance and not in limitation of the powers
conferred by statute, the Board of Directors is expressly authorized by majority
vote of the whole Board of Directors to adopt,  repeal,  alter, amend or rescind
the bylaws of the Corporation. In addition, the Bylaws of the Corporation may be
adopted, repealed,  altered, amended or rescinded by the affirmative vote of 75%
of the outstanding stock of the Corporation entitled to vote thereon;  provided,
if the  Continuing  Directors,  as  defined  in Article 11 shall by a two thirds
favorable vote of such Continuing  Directors have adopted a resolution approving
the  amendment  or repeal  proposal  and have  determined  to  recommend  it for
approval  by the  holders  of  stock  entitled  to vote  thereon,  then the vote
required shall be the affirmative  vote of the holders of at least a majority of
the outstanding shares entitled to vote thereon.

                  14. Certificate. The corporation specifically elects not to be
governed by Section 203 of the GLC. The Corporation reserves the right to amend,
alter,  change  or  repeal  any  provision  contained  in  this  Certificate  of
Incorporation  in the  manner now or  hereafter  prescribed  by statute  and the
Certificate of  Incorporation,  and all rights conferred on stockholders  herein
are granted subject to the  reservations in Article 14. Provided,  however,  the
affirmative  vote of the  holders  of at least  75% of the  voting  power of the
outstanding stock of the Corporation entitled to vote thereon, shall be required
to alter, amend, or adopt any provision  inconsistent with or repeal Articles 6,
7, 8, 9, 10, 11, 12 and 13 and this  Article  14;  provided,  if the  Continuing
Directors, as defined in Article 11 shall by a two thirds favorable vote of such
Continuing Directors have adopted a resolution approving the amendment or repeal
proposal  and have  determined  to  recommend  it for approval by the holders of
stock entitled to vote thereon,  then the vote required shall be the affirmative
vote of the holders of at least a majority of the outstanding shares entitled to
vote thereon.

<PAGE>
                  15.   Incorporator.   The  name  and   address   of  the  sole
incorporator is as follows:

                          John Hudnall
                          1100 East University Drive
                          Tempe, Arizona  85281

                  THE  UNDERSIGNED,  being  the sole  incorporator  hereinbefore
named,  for the  purpose  of  forming  a  corporation  pursuant  to the  General
Corporation  Law of the State of  Delaware  does make this  certificate,  hereby
declaring  and  certifying  that this is his act and deed and the  facts  herein
stated are true, and  accordingly  has hereunto set forth his hand this 10th day
of June, 1988.


                                  /s/ John Hudnall
                                  --------------------------------
                                  John Hudnall

Exhibit 10.1


                                                 May 13, 1999


George G. Hays
6227 East Sunnyside Drive
Scottsdale, Arizona 85254

Dear George:

                  This letter confirms the agreement reached by the Compensation
Committee of Arizona Instrument Corporation at its meeting of February 26, 1999.

                  The term of your  Employment  Agreement which was effective as
of January 1, 1998 has been extended until March 31, 2001.

                  The  Employment  Agreement  is further  modified by adding the
following clause:

                  In the event that the Company sells all or  substantially  all
of its  assets or if a change in  control  of the  Company  occurs,  then at the
occurrence  of either  event the entire  base  salary for the  remainder  of the
contract term shall become due and payable to you.

                  If this correctly  sets forth our  agreement,  please sign the
enclosed copy of this letter and return it to me.


Yours truly,                                        Accepted and Agreed
/s/S. Thomas Emerson, PhD.                          /s/George G. Hays
- --------------------------------                    -------------------------
S. Thomas Emerson, PhD                              George G. Hays
Chairman
Compensation Committee

<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS  SCHEDULE  CONTAINS  SUMMARY  FINANCIAL   INFORMATION  EXTRACTED  FROM  THE
CONSOLIDATED  FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK>  724904
<NAME> ARIZONA INSTRUMENT CORPORATION
<MULTIPLIER> 1
<CURRENCY> U.S. DOLLARS
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               MAR-31-1999
<EXCHANGE-RATE>                                      1
<CASH>                                       1,980,624
<SECURITIES>                                         0
<RECEIVABLES>                                1,774,998
<ALLOWANCES>                                   487,645
<INVENTORY>                                  1,848,117
<CURRENT-ASSETS>                             5,788,225
<PP&E>                                       3,636,379
<DEPRECIATION>                               2,828,034
<TOTAL-ASSETS>                               9,133,159
<CURRENT-LIABILITIES>                        1,725,329
<BONDS>                                          8,991
                                0
                                          0
<COMMON>                                        69,135
<OTHER-SE>                                   7,329,704
<TOTAL-LIABILITY-AND-EQUITY>                 9,133,159
<SALES>                                      1,850,832
<TOTAL-REVENUES>                             1,855,096
<CGS>                                          671,486
<TOTAL-COSTS>                                1,230,017
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               9,832
<INCOME-PRETAX>                              (125,320)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                           (56,239)
<DISCONTINUED>                                (69,082)
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                 (125,320)
<EPS-PRIMARY>                                   (0.09)
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