DETECTION SYSTEMS INC
10-Q, 1999-08-16
COMMUNICATIONS EQUIPMENT, NEC
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 10-Q

(Mark One)
[X]  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE
     ACT OF 1934

     For the quarterly period ended June 30, 1999

                                            OR

[ ]  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES
     EXCHANGE ACT OF 1934

     For the transition period from ______ to __________


                         Commission File Number: 0-8125


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


                             DETECTION SYSTEMS, INC.
             (Exact name of registrant as specified in its charter)


State of New York                                             16-0958589
(State or other jurisdiction                                  (I.R.S. Employer
of incorporation or organization)                    Identification No.)

                 130 Perinton Parkway, Fairport, New York 14450
               (Address of principal executive offices) (Zip Code)

                                                            (716) 223-4060
              (Registrant's telephone number, including area code)

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


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 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 the  filing
requirements for the past 90 days. Yes __X__ No _____


As of August 9, 1999 there were outstanding 6,350,213 shares of the registrant's
common stock, par value $.05 per share.






<PAGE>


                          PART I FINANCIAL INFORMATION
                    DETECTION SYSTEMS, INC. AND SUBSIDIARIES
                           Consolidated Balance Sheet
                      (in thousands, except per share data)
<TABLE>
<CAPTION>

Assets                                        June 30, 1999    March 31, 1999
Current assets:                                 (Unaudited)
<S>                                                 <C>               <C>
Cash and cash equivalents                           $ 7,510           $ 4,414
Accounts receivable, less allowance for
  doubtful accounts ($1,023 and $1,006,
  respectively)                                      22,781            20,916
Inventories, net                                     33,669            37,762
Other current assets                                  3,293             3,249
                                                     ------            ------
                                                     67,253            66,341
                                                     ------            ------
Fixed assets, net                                    12,550            12,420
Goodwill, net                                         9,209             9,381
Other assets                                          5,196             4,670
                                                     ------            ------
                                                    $94,208           $92,812
                                                     ======            ======
Liabilities
Current liabilities:
    Short term borrowings                            $1,518           $ 1,416
    Current portion of long term debt                 1,281               647
    Accounts payable                                  7,878             7,076
    Accrued payroll and benefits                      2,176             1,863
    Income taxes payable                              1,754             2,108
    Other current liabilities                         3,391             4,134
                                                     ------            ------
                                                     17,998            17,244

Other liabilities                                     2,659             2,645
Long term debt                                       16,451            17,179

Shareholders' equity:
   Common stock, par value $.05 per share;
    Authorized - 12,000 shares; Issued -
    6,576 shares and 6,562 shares,
    respectively                                        329               328
Capital in excess of par value                       45,128            45,073
Other accumulated comprehensive loss                   (323)             (310)
Retained earnings                                    15,868            14,447
                                                     ------            ------
                                                     61,002            59,538
Less - Treasury stock, at cost                       (3,854)           (3,780)
  Notes receivable for stock purchases                  (48)              (14)
                                                     ------            ------
                                                     57,100            55,744
                                                     ------            ------
                                                    $94,208           $92,812
                                                     ======            ======
</TABLE>

                (See accompanying notes to financial statements)


<PAGE>


                    DETECTION SYSTEMS, INC. AND SUBSIDIARIES
     Consolidated Statement of Operations and Retained Earnings (Unaudited)
                      (in thousands, except per share data)
<TABLE>
<CAPTION>

                                            June 30, 1999         June 30, 1998
For the Three Months Ended:                 (Current Year)      (Preceding Year)
                                           --------------       ---------------
<S>                                               <C>                   <C>
Net sales                                         $34,766               $33,808

Costs and expenses:
 Production                                        20,964                21,038
 Research and development                           2,293                 2,134
 Marketing, administrative and general              9,059                 8,876
                                                   ------                ------
Total costs and expenses                           32,316                32,048

Operating income                                    2,450                 1,760
Other income (expense)
 Net interest (expense)                              (220)                 (355)
 Other income (expense)                                40                   (42)
                                                   ------                ------
Income before income taxes                          2,270                 1,363
Provision for income taxes                            849                   531
                                                   ------                ------
Net income                                          1,421                   832
Other comprehensive (loss)
  Foreign currency translation adjustment             (13)                 (115)
                                                   ------                ------
Total comprehensive income                          1,408                   717

Retained earnings at beginning of period           14,447                 9,976
Less: other comprehensive loss                         13                   115
                                                   ------                ------
Retained earnings at end of period                $15,868               $10,808
                                                   ======                ======
Earnings per share
 Basic                                              $0.22                 $0.13
                                                     ====                  ====
 Diluted                                            $0.21                 $0.12
                                                     ====                  ====
</TABLE>

                (See accompanying notes to financial statements)



<PAGE>


                    DETECTION SYSTEMS, INC. AND SUBSIDIARIES
                Consolidated Statement of Cash Flows (Unaudited)
                            (in thousands of dollars)
<TABLE>
<CAPTION>

For the Three Months Ended June 30,                            1999        1998
Cash flows from operating activities:                          ----        ----
<S>                                                         <C>         <C>
Net income                                                  $ 1,421     $   832
                                                            -------     -------
Adjustments to reconcile net income to net
    cash provided by operating activities:
    Depreciation and amortization                               651         924

Changes in assets and liabilities:
    Accounts receivable                                      (1,865)       (158)
    Inventories                                               4,093      (2,313)
    Accounts payable                                            802      (1,299)
    Accrued payroll and benefits                                313         124
    Other assets & liabilities                               (1,452)        533
                                                            -------     -------
Total adjustments                                             2,542      (2,189)
                                                            -------     -------
    Net cash provided by (used in) operating
     activities                                               3,963      (1,357)

Cash flows from investing activities:
    Capital expenditures                                       (810)       (831)
    Acquisition of businesses                                  --          (473)
                                                            -------     -------
    Net cash used in investing activities                      (810)     (1,304)

Cash flows from financing activities:
    Proceeds from borrowings                                    102       2,095
    Principal payments on debt and
      capital lease obligations                                 (94)       (641)
    Common stock transactions, net                              (52)          7
                                                            -------     -------
    Net cash (used in) provided by financing
     activities                                                 (44)      1,461

Effect of exchange rates                                        (13)       (114)
                                                            -------     -------
Net increase (decrease) in cash and cash equivalents          3,096      (1,314)

Cash and cash equivalents at beginning of period
                                                              4,414       3,160
                                                            -------     -------
Cash and cash equivalents at end of period                    7,510     $ 1,846
                                                            =======     =======
Cash paid during the year for:
    Interest                                                $   375     $   419
                                                            =======     =======
    Income taxes                                            $ 1,400     $   313
                                                            =======     =======
</TABLE>

                (See accompanying notes to financial statements)



<PAGE>


                    DETECTION SYSTEMS, INC. AND SUBSIDIARIES
                          NOTES TO FINANCIAL STATEMENTS
                THREE MONTH PERIODS ENDED JUNE 30, 1999 AND 1998
                                   (Unaudited)


NOTE 1. GENERAL

The accompanying  unaudited interim consolidated  financial statements have been
prepared in accordance  with the rules and  regulations  of the  Securities  and
Exchange Commission (SEC). The interim consolidated financial statements include
the  consolidated  accounts of Detection  Systems,  Inc. and its  majority-owned
subsidiaries  (collectively,  "the Company") with all  significant  intercompany
transactions  eliminated.   In  the  opinion  of  management,   all  adjustments
(consisting only of normal recurring adjustments) necessary for a fair statement
of the financial position,  results of operations and cash flows for the interim
periods  presented  have been made.  Certain  prior  period  balances  have been
reclassified to conform with the current period  presentation.  Certain footnote
disclosures  normally  included in financial  statements  prepared in accordance
with  generally  accepted  accounting  principles  (GAAP) have been condensed or
omitted pursuant to such SEC rules and regulations.  These financial  statements
should be read in conjunction  with the Company's Annual Report on Form 10-K for
the year ended March 31, 1999.

Cash flow statement -- Non-cash  transactions during the first quarter of fiscal
1999  consisted  of the  acquisition  of certain  businesses  with shares of the
Company's common stock. See Note 3.

NOTE 2. INVENTORIES

Major classifications of inventory follow (in thousands):

                                      June 30, 1999              March 31, 1999
                                      -------------              --------------
Component Parts                             $11,790                     $14,838
Work In Process                               2,059                       2,464
Finished Products                            19,820                      20,460
                                             ------                      ------
                                            $33,669                     $37,762
                                             ======                      ======

NOTE 3. ACQUISITIONS

Fiscal  1999  Acquisitions  - In June  1998,  the  Company  acquired  all of the
outstanding shares of Efsec AB("Efsec")for  approximately $1,250,000,  comprised
of cash and 28,161 shares of its common stock. Efsec is a Swedish distributor of
electronic security equipment with annual net sales of approximately  $3,000,000
prior to its acquisition.

In June 1998, the Company acquired all of the outstanding  stock of Alarm Center
Kft  ("Alarm  Center")  for  $135,000  in  cash.  Alarm  Center  is a  Hungarian
distributor  of  electronic   security   equipment  with  annual  net  sales  of
approximately $500,000 prior to its acquisition.

These  transactions have been accounted for as purchases and,  accordingly,  the
results  of  these  businesses  are  included  in  the  consolidated   financial
statements as of the date of acquisition.  The financial  statements reflect the
final allocation of the purchase price for each business.


NOTE 4 - EARNINGS PER SHARE

There are no  significant  reconciling  items between net income as presented in
the  consolidated  statement of  operations  and net income  available to common
stockholders  used in the calculation of earnings per share.  Reconciling  items
between  the  number  of shares  used in the  calculation  of basic and  diluted
earnings per share relate to deferred  compensation plans, options and warrants,
as follows (in thousands):

                                                            Three months
                                                            Ended June 30,
                                                     1999                 1998
                                                     ----                 ----
Weighted average number of shares outstanding       6,336                6,291

Shares associated with deferred compensation,
option and warrant plans                              482                  524



NOTE 5 - RESTRUCTURING

The Company recorded a restructuring charge of approximately $400,000 during the
first quarter of fiscal 1999 for severance  costs related to the  termination of
employees at the Fairport, New York and Southall, England facilities. The charge
has been included in the results from  continuing  operations and had a material
impact on operating results in the first quarter of 1999.

NOTE 6 - GEOGRAPHIC INFORMATION

The Company's  operating  structure  includes  operating  segments in the United
States,  Asia Pacific and Europe.  Management  evaluates the  performance of its
operating  segments  separately  to  monitor  the  different  factors  affecting
financial performance in the different regions.  Segment profit or loss includes
substantially  all  of the  segment's  costs  of  production,  distribution  and
administration.  The Company  manages income taxes on a global basis,  thus, the
Company  evaluates  segment  performance  based on profit or loss before  income
taxes.

The following  table presents net sales and income (loss) before income taxes of
the  Company's  domestic  and foreign  operations.  Net sales and income  (loss)
before income taxes of the Company's  domestic  operations include the impact of
export sales.  Inter-area sales are presented on a basis intended to reflect the
market value of the products as nearly as possible.

<PAGE>

<TABLE>
<CAPTION>

For the Three Months Ended June 30,               1999                   1998
                                                  ----                   ----
                                                     (in thousands)
Sales to unaffiliated customers
<S>                                            <C>                      <C>
       United States operations                $21,223                  $22,032
       Asia Pacific operations                   5,653                    4,774
       European operations                       7,890                    7,002
                                               -------                  -------
                                               $34,766                  $33,808
                                               =======                  =======
Sales between affiliates
       United States operations                 $2,262                   $1,797
       Asia Pacific operations                   7,250                    7,688
       European operations                         117                       90
                                                ------                   ------
                                                $9,629                   $9,575
                                                ======                   ======
Income (loss) before income taxes
       United States operations                 $1,070                   $1,275
       Asia Pacific operations                     874                      725
       European Operations                        (205)                    (318)
       Eliminations                                531                     (319)
                                                 -----                    -----
                                                $2,270                   $1,363
                                                 =====                    =====
</TABLE>


NOTE 7 - OTHER MATTERS

The  Company's  Board  of  Directors  has  authorized  the  repurchase  of up to
$10,000,000 of the Company's common stock in open market transactions.


<PAGE>


                    DETECTION SYSTEMS, INC. AND SUBSIDIARIES
                MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                       CONDITION AND RESULTS OF OPERATIONS

Overview


      The  Company is a  supplier  of  equipment  to the  electronic  protection
industry.  The Company designs,  manufactures and markets electronic  detection,
control and  communication  equipment  for  security,  fire  protection,  access
control and closed circuit television ("CCTV")  applications,  offering products
primarily for the  commercial and mid- to high-end  residential  portions of the
market.  From its  founding  in 1968 until 1995,  the  Company  was  primarily a
provider of  security  sensor  devices for the  domestic  market.  In 1995,  the
Company adopted a strategy designed to expand its product  offerings,  establish
an international sales presence, increase its manufacturing capacity and improve
its overall cost structure. The Company has since made nine acquisitions, opened
four sales  offices and  established  a  manufacturing  facility in Asia.  These
initiatives have enabled the Company to significantly expand its product catalog
and market reach and to increase its net sales from  $34,336,000  in fiscal 1995
to $138,045,000 in fiscal 1999.

      The Company  recognizes  net sales upon shipment of products to customers.
Production expenses include materials,  direct labor and manufacturing  overhead
as well as an allocated portion of indirect overhead.  Outgoing freight, customs
and other costs associated with delivery of products to customers are classified
under marketing,  administrative and general expenses.  Research and development
expenses  include  costs  associated  with  salaries  and  benefits  for certain
engineering employees,  supplies, agency approvals,  depreciation and occupancy,
as well as charges for independent  testing and independent  contractors engaged
for specific  projects.  Marketing,  administrative and general expenses include
costs  related  to  the  Company's  sales  efforts  and  corporate  and  general
administrative functions, including costs of executive, administrative and sales
personnel,    marketing/selling   supplies,   advertising,    depreciation   and
professional fees.



<PAGE>


Results of Operations

      The following table sets forth, for the periods indicated, the percentages
which certain items of income and expense bear to net sales:
<TABLE>
<CAPTION>
                                                                   (Unaudited)
                                   Fiscal Year Ended          Three Months Ended
                                        March 31,                  June 30,
                                 1999        1998             1999        1998

<S>                             <C>         <C>              <C>          <C>
Net sales                       100.0%      100.0%           100.0%       100.0%
Costs and expenses:
 Production                      61.7        65.6             60.3         62.2
 Research and development         6.1         6.8              6.6          6.3
 Marketing, administrative
  and general                    25.9        23.8             26.1         26.3
                                 ----        ----             ----         ----
Operating income                  6.3         3.8              7.0          5.2

Net interest expense             (1.1)       (1.6)            (0.6)        (1.1)
Other income (expense)            0.1        (0.4)             0.1         (0.1)
                                 ----        ----             ----         ----
Income before income taxes
                                  5.3         1.8              6.5          4.0
Provision for income taxes        2.1         0.7              2.4          1.6
                                 ----        ----             ----         ----
 Net income                       3.2%        1.1%             4.1%         2.4%
                                  ===         ===              ===          ===

</TABLE>

Three Months Ended June 30, 1999 Compared to Three Months Ended June 30, 1998

      The Company's net sales increased 2.8% to $34,766,000 in the first quarter
of fiscal 2000 from $33,808,000 in the comparable period in fiscal 1999. The net
sales of acquired businesses accounted for $550,000 of this increase while sales
from on-going operations accounted for $408,000. Net sales during this period by
the Company's  on-going  operations have been favorably impacted compared to the
year ago period by strong  sales in the  Asia-Pacific  region,  which  increased
18.0%.  Sales by on-going  operations in the Unites States and European  regions
were consistent with the year ago period.

      Production  expenses  decreased  0.4% to  $20,964,000  in the fiscal  2000
period from $21,038,000 in the comparable period in fiscal 1999. As a percentage
of net sales,  production  expenses decreased to 60.3% in the fiscal 2000 period
compared  to 62.2% in the  comparable  period in fiscal  1999.  The  decrease in
production  expenses  in the  aggregate  and as a  percentage  of net  sales was
primarily due to improvements in the Company's manufacturing cost structure.

      Research and  development  expenses  increased  7.5% to  $2,293,000 in the
fiscal 2000 period from $2,134,000 in the comparable period in fiscal 1999. As a
percentage of net sales,  research and development expenses increased to 6.6% in
the fiscal 2000 period from 6.3% in the comparable  period in 1999. The increase
in  research  and  development  expenses  is  primarily  attributable  to modest
increases  in  headcount  to support  the  Company's  research  and  development
efforts.

      Marketing,   administrative   and  general  expenses   increased  2.1%  to
$9,059,000 in the fiscal 2000 period from $8,876,000 in the comparable period in
fiscal  1999.  The year ago period  included a  $400,000  restructuring  charge.
Excluding  the impact of this  charge,  marketing,  administrative  and  general
expenses increased 6.9%.  Approximately $400,000 of this increase relates to the
acquisition  of Efsec and Alarm Center (See Note 3). The  remaining  increase is
attributable   to  the  addition  of  personnel  in  our  sales  and   marketing
departments. As a percentage of net sales, marketing, administrative and general
expenses  decreased  to  26.1%  in the  fiscal  2000  period  from  26.3% in the
comparable period in fiscal 1999.

      Net interest expense  decreased to $220,000 in the fiscal 2000 period from
$355,000 in the comparable period in 1999, as borrowings  outstanding were lower
during the current period.

      The  Company's  effective  income tax rate for the fiscal  2000 period was
37.4% compared to 39.0% for the comparable period in fiscal 1999.

Liquidity and Capital Resources

      The Company  considers  liquidity  to be its ability to meet its long- and
short-term cash  requirements.  Prior to 1996, those requirements were primarily
met by cash generated by the Company's  operating  activities and cash reserves.
Since the  implementation  of the  Company's  strategy  designed  to enhance its
product  offerings,   manufacturing   capacity  and  international   operations,
particularly  its  acquisitions  and the  development of the Asia facility,  the
Company has required  external  sources of  financing  to satisfy its  liquidity
needs.

      Three Months  Ended June 30, 1999.  During the three months ended June 30,
1999, the Company's  operating  activities provided $3,963,000 of operating cash
flow. Net income,  depreciation and amortization provided $2,072,000. A decrease
in inventories  provided  $4,093,000.  An increase in accounts  payable provided
$802,000, while an increase in accounts receivable used $1,865,000.
Other account changes used $1,139,000 of operating cash flow.

      During the three  months  ended  June 30,  1999,  cash used for  investing
activities was $810,000, relating to capital expenditures.

      During  the three  months  ended  June 30,  1999,  cash used in  financing
activities was $44,000, primarily representing principal repayments of debt.

      Capital  Resources.  On June 30,  1999,  the Company had cash  balances of
$7,510,000.  On that  date,  the  Company  had a  $17,000,000  revolving  credit
facility that was not drawn.  This credit  facility  bears  interest  based upon
either the  federal  funds  rate,  the prime rate or LIBOR,  each  adjusted by a
factor  which  varies  based upon the rates of funded  debt to  earnings  before
interest, tax, depreciation and amortization, and matures on July 31, 2000.

      The  Company   expects  to   continue   to  pursue   expansion/acquisition
opportunities  and the  development  of new products  and  markets.  Significant
expenditures will also include continued research and development  investment in
detection,  control  and  communication  projects.  The  Company  also  plans to
continue its efforts to market its products internationally.

      The Company's  Board of Directors has  authorized  the repurchase of up to
$10,000,000 of the Company's common stock in open market transactions.

      The Company  believes that the  combination  of its current cash balances,
cash flows from operations and existing credit  facilities will be sufficient to
fund its  planned  operations  during  fiscal  2000.  However,  there  can be no
assurance  that  existing  cash flow will be  sufficient  to fund the  Company's
on-going operations.

Year 2000.  The  Company  has  appointed a team to assess the impact of the year
2000 on its information systems,  products, and business. This team includes two
members of senior management and is led by the Vice President of Operations.  To
ensure year 2000 compliance,  the Company has established specific categories to
be reviewed:

Products.  The Company  places a high priority on ensuring its products are year
2000 ready.  The  Company  has  completed  its review of all  products  that are
manufactured  domestically  and at its Asia  manufacturing  facility  as well as
products purchased for resale by its domestic  businesses.  The Company believes
these  products  to be year 2000  compatible.  The  Company  is  completing  its
assessment of year 2000 compatibility of products manufactured and purchased for
resale  at  its  other  foreign  subsidiaries.   The  Company  does  not  expect
significant  issues with year 2000  readiness  of  products  sold by its foreign
subsidiaries  as  products  sold  by  the  Company  generally  do not  use  date
information for calculations or comparisons.

Manufacturing.  Some of the tools and equipment  (hardware and software) used to
develop and manufacture the Company's products are  date-sensitive.  The Company
believes that the  date-sensitive  tools and equipment used by it to manufacture
products are now year 2000  compatible.  As a result the Company does not expect
significant  interruption  to  its  manufacturing  capabilities  because  of the
failure of tools and/or equipment.

Non-Manufacturing Business Applications. The Company is in the process of fixing
and testing all  non-manufacturing  business applications such as core financial
information and reporting systems, procurement, human resources/payroll, factory
applications, customer service systems, and revenue systems, and does not expect
any significant year 2000 problems in this area.

The  Company's  domestic  business  information  systems  required  upgrades and
enhancements to be made year 2000 compatible.  These upgrades have been made and
are currently being tested.  Necessary upgrades to other information  technology
infrastructure  have been identified and  remediation is in process.  Testing of
year 2000 upgrades is expected to be completed prior to the year 2000.

Most of the Company's non-US  subsidiaries'  information systems require various
degrees of upgrade or  replacement  to be capable of  handling  year 2000 issues
(excluding  the Hong Kong  subsidiary,  which  utilizes the  Company's  domestic
information  system).  The  Company  has  purchased  a new  enterprise  resource
planning  system  capable  of  handling  the year 2000 that is  currently  being
implemented at its foreign  subsidiaries.  This implementation is expected to be
complete at all locations  prior to December 31, 1999. The Company expects to be
capable  of  handling  the  year  2000  at  all  locations  without  significant
interruption to business activity.

Facilities  and  Infrastructure.  The Company has evaluated its  facilities  and
infrastructure   (health,    safety   and   environment   systems,    buildings,
security/alarms/doors, desktop computers, networks) to ensure they are year 2000
compatible. Upgrades are being implemented where needed and the Company does not
expect significant  interruption to its operations because of year 2000 problems
with its facilities and infrastructure.

Logistics.  Of  importance  to the  Company  for year 2000 is the  readiness  of
suppliers  and the  products  the Company  procures  from  suppliers  as well as
customers  and service  providers.  The Company has a  comprehensive  program to
identify and obtain year 2000 information from its critical suppliers, customers
and service providers.  The program includes awareness letters,  questionnaires,
and a review of year 2000 web-sites.  The Company has mailed a questionnaire  to
substantially all suppliers, customers and service providers regarding year 2000
readiness.   Responses  are  currently  being  received  and  evaluated  and  no
significant issues have been noted as of the date of this report. If a supplier,
customer or service  provider is of concern  regarding year 2000 readiness,  the
Company will develop contingency plans to minimize the year 2000 risk.

The Company  estimates that its aggregate  costs for year 2000  activities  from
1997  through  2000 will be  approximately  $875,000.  External  costs  incurred
through December 31, 1998 were  approximately  $795,000 and primarily related to
computer  hardware and software.  It is anticipated that the remaining year 2000
costs will relate to computer  software,  computer hardware and consulting fees.
The Company does not separately  track internal costs relating to the year 2000,
and they are not included in the  Company's  estimate of year 2000 costs.  These
costs do not include  estimates for potential  litigation,  which at the present
time is not viewed as a significant  risk. The Company  reviews and updates data
for costs incurred and forecasted  costs each quarter.  These costs are based on
management's  estimates,  which were  determined  based on assumptions of future
events,  some within the  Company's  control,  but some  outside  the  Company's
control.

Management's estimate of the costs and completion dates are dependent on various
factors  including  the  availability  of skilled  resources  and the ability to
locate and modify all  relevant  software  code.  No amount of  preparation  and
testing can guarantee year 2000 compliance. Nevertheless, the Company recognizes
that failing to resolve its year 2000 issues on a timely basis would, in a worst
case scenario, significantly limit its ability to manufacture and distribute its
products  and  process  its daily  business  transactions  for a period of time,
especially  if such  failure  is  coupled  with  third  party or  infrastructure
failures.  Similarly, the Company could be significantly affected by the failure
of  one  or  more   significant   suppliers,   customer  or  components  of  the
infrastructure to conduct their respective operations without interruption after
1999.  Because of the  difficulty of assessing the year 2000  compliance of such
third parties,  the Company considers the potential  disruptions  caused by such
parties to present the most  reasonably  likely  worst-case  scenarios.  Adverse
effects on the Company could include business disruption,  increased costs, loss
of sales and other similar  ramifications.  However,  the Company believes it is
taking  appropriate  preventive  measures and will be successful in avoiding any
material adverse effect on the Company's operations or financial condition.

For additional  information  regarding the risks  associated  with the Company's
compliance  with  year  2000,  see  "Risk  Factors-Year  2000"  in Item 1 of the
Company's Form 10-K for the year ended March 31, 1998.

      Euro  Conversion.  The Company is assessing the potential  impact that may
result  from  the  completion  of the euro  conversion  in a  number  of  areas,
including the following:  (1)  accounting  and tax; (2)  management  information
systems required to accommodate euro-denominated transactions; (3) the impact on
currency  exchange costs and currency exchange rate risk,; and (4) the impact on
existing  contracts.  There  has  been  no  significant  impact  to the  Company
resulting from the initial transition to the euro.

      Dividend Policy.  The Company is dedicated to promoting  shareholder value
through  long  term   profitability  and  growth  and  believes  that  continued
investments in future product  development  are essential to this goal. For this
reason, it has been the Company's policy to not pay cash dividends.

Forward-Looking Statements

      This quarterly report contains certain "forward-looking statements" within
the meaning of Section 27A of the Securities Act of 1933, as amended and Section
21E of the  Securities  Exchange Act of 1934,  as amended,  which  represent the
Company's  expectations or beliefs,  including,  but not limited to,  statements
concerning  industry  performance,   the  Company's   operations,   performance,
financial condition,  growth and acquisition  strategies,  margins and growth in
sales of the Company's products.  For this purpose,  any statements contained in
this quarterly  report that are not statements of historical  fact may be deemed
to be  forward-looking  statements.  Without  limiting  the  generality  of  the
foregoing,   words  such  as  "may,"  "will,"   "expect,"   "believe,"   "plan,"
"anticipate," "intend," "could," "estimate," "continue," "goal" or "strategy" or
the negative or other variations thereof or comparable  terminology are intended
to identify forward-looking statements. These statements by their nature involve
substantial risks and  uncertainties,  certain of which are beyond the Company's
control,  and actual  results may differ  materially  depending  on a variety of
important  factors,  including those described  previously in the "Risk Factors"
section of the Company's 1999 Form 10-K for the year ended March 31, 1999.


<PAGE>


                            PART II OTHER INFORMATION



Item 4.       Submission of Matters to a Vote of Security Holders.

              At the Annual Meeting of Shareholders held on August 12, 1999, the
              following individuals were elected to the Board of Directors:
<TABLE>
<CAPTION>

              Nominated Director           FOR            WITHHELD     ABSTAINED
              ------------------           ---------      ---------    ---------

              <S>                          <C>            <C>              <C>
              Donald R. Adair              4,508,711      1,414,081        0
              Mortimer B. Fuller III       4,508,736      1,414,056        0
              Karl H. Kostusiak            4,508,669      1,414,123        0
              David B. Lederer             4,508,736      1,414,056        0
              Edward C. McIrvine           4,508,736      1,414,056        0
</TABLE>
<TABLE>
<CAPTION>

              The following proposals were also approved:


                                               FOR           WITHHELD  ABSTAINED
                                               ---------     --------  ---------
              <S>                               <C>         <C>           <C>

              Amend the Company's 1997 Stock
              Option Plan to increase the
              number of shares authorized for
              options under the Plan           4,120,278    1,599,443     44,017

                                               FOR           WITHHELD  ABSTAINED
                                               ---------     --------  ---------
              Adopt the Company's Non-
              Employee Director Stock Option
              Plan and to ratify options
              granted pursuant to the Plan     4,124,604    1,593,965     45,169

                                               FOR           WITHHELD  ABSTAINED
                                               ---------     --------  ---------

              Amend the Company's Certificate
              of  Incorporation  to  achieve
              consistency with recent changes
              in New York Business
              Corporation Law concerning
              approval of loans to directors   5,515,404      209,576     38,758

                                               FOR           WITHHELD  ABSTAINED
                                               ---------    ---------  ---------

              PricewaterhouseCoopers LLP be
              retained as independent
              auditors of the Company for the
              fiscal year ending March 31,
              2000                             5,791,870       97,399     33,523


</TABLE>



Item 5.       Other Information

A.       Shareholder Proposals - Deadline for Inclusion in Proxy Materials
                  As set forth in the  Company's  Proxy  Statement  for the 2000
                  Annual Meeting of Stockholders,  any proposal by a stockholder
                  of the  Company  intended to be  presented  at the 2000 Annual
                  Meeting of Stockholders  must be received by the Company on or
                  before March 11, 2000 to be included in the proxy materials of
                  the Company relating to such meeting.

B.       Shareholder Proposals - Discretionary Voting of Proxies
                  In accordance  with recent  amendments to Rule 14a-4 under the
                  Securities  Exchange Act of 1934, if notice of a proposal by a
                  shareholder  of the Company  intended to be  presented  at the
                  2000 Annual Meeting of Shareholders is received by the Company
                  after May 25, 2000, the persons authorized under the Company's
                  management  proxies may  exercise  discretionary  authority to
                  vote or act on such  proposal if the proposal is raised at the
                  2000 Annual Meeting of Shareholders.

Item 6.  Exhibits and Reports for Form 8-K.

              A. Exhibits

                  See Exhibit Index

B.       Reports on Form 8-K

              No reports on Form 8-K were filed during the quarter.




<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.

                                           DETECTION SYSTEMS, INC.
                                           Registrant

DATE: August 16, 1999                      By: /s/ Karl H. Kostusiak
                                           Karl H. Kostusiak, President


                                           By: /s/ Frank J. Ryan
                                           Frank J. Ryan, Vice President,
                                           Secretary and Treasurer
                                            (Principal Financial Officer)


                                           By: /s/ Christopher P. Gerace
                                           Christopher P. Gerace, Vice President
                                           Chief Accounting Officer
                                            (Principal Accounting Officer)








<PAGE>


                                  EXHIBIT INDEX

Item
No.              Exhibits                                         Location

3(a)    Detection Systems, Inc.                Incorporated by reference to
        Certificate of                         Exhibit 3 of the Company's
        Incorporation as amended               Quarterly Report on Form 10-Q for
                                               the quarter ended 9/30/98

3(b)    Detection Systems, Inc.                Incorporated by reference to
        By-Laws as amended                     Exhibit 3(b) of the Company's
                                               1997 Annual Report on Form 10-K

10(a)   Medical reimbursement plan             Incorporated by reference to
                                               Exhibit 10(b) of the Company's
                                               1997 Annual Report on Form 10-K

10(b)   Employee stock purchase plan           Incorporated by reference to
                                               Exhibit 10 of the Company's 1994
                                               Annual Report on Form 10-K

10(c)    Fleet Amended & Restated              Incorporated  by reference to
         Credit Facility Agreement             Exhibit 10(c) of the Company's
         dated September 30,1998               Quarterly Report on Form 10-Q for
                                               the quarter ended 9/30/98

10(d)   Deferred Compensation Plan             Incorporated by reference to
        and Deferred Bonus Plan                Exhibit 10(c) to the Company's
                                               Quarterly Report on Form 10-Q for
                                               the quarter ended 12/31/97

10(e)   1992 Restated Stock Option             Incorporated by reference to
        Plan                                   Exhibit 22 of the Company's 1995
                                               Annual Report on Form 10-K

10(f)   1997 Stock Option Plan                 Incorporated by reference to
                                               Exhibit 10(o)of the Company's
                                               Registration Statement on Form S-
                                               2 (No. 333-31951) filed on
                                               7/24/97.

10(g)   Non-Employee Director Stock            Incorporated by reference to
        Option Plan                            Exhibit 10(m) of the Company's
                                               Quarterly Report on Form 10-Q for
                                               the quarter ended 9/30/98

10(h)   Executive Officer Cash                 Incorporated by reference to
        Bonus Plan                             Exhibit 10(h)of the Company's
                                               1999 Annual Report on Form 10-K

10(i)   Executive employment                   Included as Exhibit 10(i) of this
        contract with Karl H.                  Quarterly Report on Form 10-Q
        Kostusiak

10(j)   Executive employment                   Included as Exhibit 10(j) of this
        contract with David B.                 Quarterly Report on Form 10-Q
        Lederer

10(k)   Stock Purchase Agreements              Incorporated by reference to
        with Karl H. Kostusiak and             Exhibit 10(n) of the Company's
        David B. Lederer                       1997 Annual Report on Form 10-K

11      Statement re: Computation              Included as Exhibit 11 of this
        of Per Share Earnings                  Quarterly Report on Form 10-Q

27      Financial Data Schedule                Included as Exhibit 27 of this
                                               Quarterly Report on Form 10-Q

                           EMPLOYMENT AGREEMENT

      AGREEMENT,  made  as of the  1st  day of  June,  1999  between  Karl H.
Kostusiak  ("Executive") and Detection Systems,  Inc., a New York corporation
("Company").

                                 WITNESSETH:

      In  consideration  of  the  mutual  covenants   contained  herein,  the
parties agree as follows:

      1.    Offer of  Employment  and  Term.  The  Company  agrees  to employ
Executive in the  capacities  of  Chairman,  President,  and Chief  Executive
Officer  for  the  Term  of  Employment  commencing  as of the  date  of this
Agreement  (the   "Commencement   Date").   The  Company  agrees  to  provide
Executive with such office and such  operational and  administrative  support
as is  consistent  with  his  position.  Executive's  employment  under  this
Agreement  will  be  in  the  vicinity  of  Rochester,  New  York.  "Term  of
Employment"  as  used  herein  shall  mean  the  period   commencing  on  the
Commencement  Date and  continuing  thereafter  for a period  of five  years,
unless  the  Company  and  Executive  agree in  writing to extend the Term of
Employment,  in which case the Term of  Employment  shall have the meaning as
determined at that time; provided,  however, that Executive's  employment may
be earlier  terminated as hereinafter  set forth,  in which event the Term of
Employment  shall mean the period  from the  Commencement  Date  through  the
date of such  earlier  termination.  Except as  provided  in Section 4 below,
upon  the  end of the  Term of  Employment  hereunder,  the  Non-Competition,
Disability,  and Retirement  Agreement attached as Exhibit A (hereinafter the
"N-CDR  Agreement")  shall become  effective as provided in Sections 1 and 19
thereof.  Whenever the N-CDR  Agreement  becomes  effective,  this  Agreement
shall terminate, except for any accrued liabilities hereunder.

      Notwithstanding   any  of  the  other  provisions  of  this  Agreement,
however,  this Agreement will automatically  terminate upon Executive's death
and thereupon all payments and non-vested  benefits  payable  hereunder shall
cease,  except for any death  benefits and  survivor  benefits for his spouse
which  are  provided  under  the  Company's   employee  plans  or  the  N-CDR
Agreement,  which shall upon the death become effective  pursuant to Sections
1 and 19 thereof.

      The Company may terminate this  Agreement due to Executive's  permanent
disability,  as  determined  by the Board of Directors in good faith based on
the  certification  of an  independent  M.D.,  and in any such case the N-CDR
Agreement  shall  thereupon  become  effective  pursuant to Sections 1 and 19
thereof.

      2.    Executive's  Acceptance.  Executive  hereby accepts the executive
employment  described in this  Agreement.  Executive  further  agrees that he
will devote  himself during  reasonable  business hours to performance of the
duties  and  responsibilities  of his office  during the Term of  Employment.
Executive  also agrees not to disclose  trade  secrets of the Company,  or to
engage in any other  activity  which is  detrimental  to the interests of the
Company, during the Term of Employment.

      3.    Compensation  and Benefits.  The  compensation and benefits which
the Company  shall  provide  Executive  for his  services  during the Term of
Employment shall include but not be limited to:

      (a)   Base salary equal to or greater than $335,486 per year.

      (b)   Participation  in all Company  executive  incentive  compensation
plans.  Such  incentive  compensation  plans  shall  include  an annual  cash
bonus  equal  to an  amount  not less  than 5% of the  amount  by  which  the
Company's  pre-tax  profits exceed 4% of net sales.  If Executive is employed
by the  Company  for  only  part of a year or his  employment  is  terminated
before  year end,  the  bonus  for that  year will be pro rated  based on the
portion  of the  year  Executive  was  employed  by the  Company  (except  as
otherwise provided in Section 4 below).

      (c)   Grants of options under any Company  employee  stock option plan,
where  permitted by the Plan, in such amounts as are  determined by the Board
of Directors or the Committee of the Board administering such plan;

      (d)   Participation  in all  Company  pension,  deferred  compensation,
insurance,  health and welfare or other  benefit plans in which the Company's
senior executives are entitled to participate; and

      (e)   Continuation  of all plans in which the  Executive  participates,
including  existing  fringe  benefits  and  executive  perquisites  to  which
Executive is entitled as of the date of this Agreement.

      4.    Termination    Without   Cause.   The   Company   may   terminate
Executive's  employment  without  Cause as  hereinafter  defined  and for any
reason.  If Executive is terminated  without Cause,  Company will continue to
compensate  and provide  benefits to Executive as if he had  continued in the
Company's  employment under this Agreement for the then remaining  balance of
the Term of  Employment  or for a period of three (3) years  from the date of
termination,  whichever  is  longer.  So  long as  Executive  is  being  paid
currently  under this  Section 4,  Executive  shall  comply with Section 2 of
the  N-CDR  Agreement.  At the end of the  period  set  forth  above  in this
Section 4 (during  which  period the Company  shall  continue  to  compensate
Executive  pursuant to this  Agreement),  the N-CDR  Agreement  shall  become
effective in accordance with Sections 1 and 19 thereof.

      5.    Termination  for Cause.  The  Company may  terminate  Executive's
employment  immediately  and  without  prior  notice  to  the  Executive  for
"Cause" as defined  below.  The  existence  of Cause shall be  determined  by
the  Company's  Board of  Directors  (other  than  Executive)  acting in good
faith.   "Cause"  is  defined,   and  shall  be  limited  to,  a  good  faith
determination  by the  Board  of  Directors  that  any of the  following  has
occurred:

      (a)   Executive  has  knowingly   misappropriated  for  his  benefit  a
material amount of funds or property of the Company;

      (b)   Executive  has  obtained  a  material  personal  profit  from any
illegal Company transaction with a third party;

      (c)   Executive  has obtained a material  personal  profit from the use
of the Company's trade secrets other than on its behalf;

      (d)   The Company has suffered  material  financial harm from knowingly
illegal  action by Executive,  other than on the Company's  behalf or for its
benefit; or

      (e)   Willful and  prolonged  absence from work by Executive or willful
refusal by  Executive  to  perform  his  duties  and  responsibilities  under
circumstances which, in either case,  constitute a substantial  abdication of
Executive's  duties  and  responsibilities  of  his  office,   provided  that
Executive  has been given  written  notice of that  absence  or  refusal  and
Executive  has not  substantially  cured  the  stated  Cause  within  60 days
thereafter  (but action taken by  Executive in reliance  upon Section 7 below
shall not be deemed an absence or refusal for purposes of this Section 5).

      If  Executive's  employment is terminated by the Company for Cause,  he
shall continue to be paid  compensation  and provided  benefits in accordance
with the  provisions  of  Section 4 above and the N-CDR  Agreement,  provided
that his cash  compensation  shall be reduced  by the amount of any  monetary
damage  suffered by the Company due to the Cause,  as  determined  by a court
of competent  jurisdiction,  prorated over the actuarially determined term of
such  payments  and based on a final court  determination;  and at the end of
the  period  specified  in  Section  4,  the  N-CDR  Agreement  shall  become
effective in accordance with Sections 1 and 19 thereof.

      6.    Resignation.  Executive  may  voluntarily  resign  from full time
employment  with the  Company,  effective  no earlier  than 90 days after the
Executive has given  written  notice  thereof to the  Company's  Secretary or
the Chairman of the  Compensation  Committee  of the Board of  Directors  and
the Term of Employment  shall  terminate on the  effective  date set forth in
the  notice.  If  Executive  resigns  or  otherwise  voluntarily  leaves  the
Company's  employment  prior to a Change in  Control,  he shall  forfeit  all
compensation  and non-vested  benefits,  from and after the effective date of
such  resignation,  except that upon that effective date the N-CDR  Agreement
shall become effective in accordance with Sections 1 and 19 thereof.

      7.    Change in Control.

      (a)   A "Change  in  Control"  of the  Company  shall be deemed to have
occurred if:
                  (1)   any  "person,"  as such  term  is  used  in  Sections
            13(d)  and  14(d) of the  Securities  Exchange  Act of  1934,  as
            amended  (the  "Exchange  Act")  (other  than the  Company or any
            corporation  owned,  directly or indirectly,  by the shareholders
            of the Company in  substantially  the same  proportions  as their
            ownership   of  stock  of  the   Company),   is  or  becomes  the
            "beneficial  owner" (as defined in Rule 13d-3 under the  Exchange
            Act),  directly  or  indirectly,  of  securities  of the  Company
            representing  25% or more of the  combined  voting  power  of the
            Company's then outstanding securities;

                  (2)   there is  elected  35% or more of the  members of the
            Board of  Directors  of the Company  without the  approval of the
            nomination  of such  members by a majority  of the Board  serving
            prior to such election;

                  (3)   the  shareholders  of the Company approve a merger or
            consolidation  of the Company with any other  corporation,  other
            than (i) a merger  or  consolidation  which  would  result in the
            voting  securities of the Company  outstanding  immediately prior
            thereto  continuing  to  represent  more than 75% of the combined
            voting power of the voting  securities  of the  Company,  or such
            surviving  entity,  outstanding  immediately after such merger or
            consolidation;  or (ii) a merger  or  consolidation  effected  to
            implement   a   recapitalization   of  the  Company  (or  similar
            transaction)  in which no "person"  (as defined  above)  acquires
            more  than 25% of the  combined  voting  power  of the  Company's
            then-outstanding securities; or

                  (4)   The   shareholders   of  the   Company   approve   an
            agreement  for the sale or  disposition  by the Company of all or
            substantially all of the Company's assets.

            (b)   If:
                    (i)   any Change in Control of the Company  occurs  while
                  this  Agreement  is effective, and

                    (ii)  Executive  gives  notice to the Company or the Company
                  (acting upon a  determination  of its Board of Directors)
                  gives notice to Executive, in either case to the effect that
                  the six month period called for by this Section 7(b) shall
                  begin to run, and

                    (iii)  Executive's  employment  is  terminated by Executive
                  or by the Company (other  than for  Executive's death or
                  disability) within six months after the date the notice
                  provided for in (ii) above is received (in Executive's case
                  the  termination  being effected by Executive  giving  notice
                  within that six month  period,  effective within 30 days
                  after the notice is given,  that his employment is
                  terminated), regardless the reason, if any, and regardless
                  which  party gave the notice provided for in (ii) above,

     then the Company shall,  upon receipt of said notice,  immediately pay,
     transfer,  and provide to Executive  the following  amounts,  benefits,
     and assets:

                  (1)   The  Company  shall  pay  to  Executive  the  sum  of
            Executive's  full  base  salary  through  the  effective  date of
            termination  of his  employment at the rate in effect at the time
            of  termination  or at the time the  Change  in  Control  occurs,
            whichever  is  higher,  and an amount  equal to the amount of any
            bonus  which  has  been  earned  by him but not yet  paid to him.
            These  two  amounts  shall  be paid to  Executive  in a lump  sum
            within five days  following  the effective  date of  termination,
            or in the case of a bonus  which  is not  readily  calculable  at
            that time, within five days after the bonus can be calculated.

                  (2)   The Company  shall pay to  Executive  an amount equal
            to three times the  highest  total cash  compensation  (including
            base salary and bonuses)  paid  Executive in any of the Company's
            last three  fiscal  years  completed  prior to such  termination.
            This amount  shall be paid to  Executive  as provided in the last
            sentence of subsection (1) above.

                  (3)   The Company  shall pay to  Executive  an amount equal
            to the total  amounts  that would be expended for the benefits to
            be provided  Executive  under  Section 3 above if  Executive  had
            continued  to be an  employee  of the Company for three (3) years
            after the  termination  (such as, but not  limited  to, the life,
            accident,  disability,  health  and travel  insurance,  and other
            benefits  in  effect  for   Executive   at  the  time  notice  of
            termination  is  given  or at the  time  the  Change  in  Control
            occurs,  whichever  may be higher  in the case of each  benefit).
            This amount  shall be paid to  Executive  as provided in the last
            sentence of  subsection  (1) above  either in cash or in the form
            of  an  annuity  contract  issued  by  an  independent  insurance
            company  licensed to do  business  in New York that will  provide
            payment of all such total amounts.

                  (4)   All  options  and other  rights  that  Executive  may
            hold  to  purchase  or  otherwise  acquire  Common  Stock  of the
            Company  shall  immediately  become  exercisable  in full for the
            total  number  of  shares  that are or might  become  purchasable
            thereunder,   in  each  case   without   further   condition   or
            limitation  except  the  giving  of notice  of  exercise  and the
            payment of the purchase price  thereunder (but without  amendment
            of the plan under  which they were  issued).  At his  discretion,
            Executive  may elect to  surrender  to the  Company his rights in
            any  such  options  and  rights  held  by  him  and,   upon  that
            surrender,  the Company  shall pay him an amount in cash equal to
            the  aggregate  spread  between the exercise  prices of all those
            options   and  rights   and  the  value  of  the   Common   Stock
            purchasable  thereunder  (or of any other security into which the
            Common Stock has been  exchanged or  converted) as of the date of
            the  termination  of  employment,  the value to be  determined by
            the  reported  last sale price of the Common  Stock or that other
            security  (or the mean  between the  reported  last bid and asked
            prices)  on that  date on NASDAQ  (or,  if it is not  NASDAQ,  on
            whatever may then be the principal  exchange or quotation  system
            on which the  Company's  Common  Stock or that other  security is
            traded at that time).

                  (5)   The Company  shall repay any policy loans  previously
            taken on the Company's  insurance  policies on  Executive's  life
            (provided  that the  directors of the Company were given  written
            notice  promptly  after the making of any such  loans  which were
            made  while  Executive  was the chief  executive  officer  of the
            Company),  and then shall  transfer to  Executive  any and all of
            its  right,  title,  and  interest  in and to  all  Company  life
            insurance  policies on Executive's  life (and upon that transfer,
            Executive  shall be deemed to have  released the Company from any
            and all  obligations  it then  owes  to him to  maintain  and pay
            premiums  on  those  policies,   all  other   provisions  of  any
            agreements   under  which  those   policies  were  agreed  to  be
            maintained, however, to remain in effect).

                  (6)   In addition to the amounts  specified  in clauses (1)
            through  (5) of this  paragraph  (b),  the  Company  shall pay to
            Executive,  at the  same  time as  those  amounts  are  paid,  an
            additional  amount which,  after taking into account all federal,
            state,  and local  income and  excise  taxes  that  Executive  is
            required  to pay  with  respect  to  receipt  of  the  additional
            amount  under this  clause  (6),  will  render the net  after-tax
            payment to Executive under this clause (6) equal to the sum of:

                        (A)   all  federal,  state,  and local  excise  taxes
                  that  Executive  is  required  to pay with  respect  to the
                  payments  made  pursuant  to clauses (1) through (5) above;
                  and

                        (B)   all  federal,   state,  and  local  income  and
                  excise  taxes  that  Executive  is  required  to  pay  with
                  respect to the payment made pursuant to this clause (6).

            The  foregoing  amounts of federal,  state,  and local income and
            excise  taxes  shall  be  determined  initially  by a  nationally
            recognized  firm of independent  public  accountants  retained by
            Executive  at  his  expense  or,  at   Executive's   option,   by
            independent  public  accountants  at the Company's  expense,  and
            such  determination  and the basis therefor shall be furnished in
            writing to Executive  and the Company.  Payment  shall be made by
            the  Company  in  accordance  with  that  initial   determination
            regardless   whether   there  is  a  dispute  over  the  accuracy
            thereof.  If either party  disputes  that  initial  determination
            the  matter   shall   promptly  be   referred  to  a   nationally
            recognized  firm of independent  public  accountants  selected by
            the  Executive  (which  firm shall not have been  involved in the
            initial  determination),  and  Executive  and the  Company  shall
            promptly  furnish to that firm such  information as it reasonably
            requests.  The  Company  shall  make such  additional  payment to
            Executive or Executive  shall refund to the Company,  as the case
            may be,  in  accordance  with the  latter  firm's  determination.
            The  fees  and  expenses  of that  firm  shall  be  borne  by the
            Company.

      (c)   The Company  may  withhold  from any  payments  due to  Executive
under  paragraph (b) such amounts as its independent  public  accountants may
determine are required to be withheld under  applicable  federal,  state, and
local tax laws.

      (d)   If  applicable,  the  provisions  of Section  7(b) shall  control
over the  provisions  of  Sections 4 and/or 5. In the event that  Executive's
employment is not  terminated by the Company or the Executive  within the six
month period  specified in Section 7(b),  the  provisions of Sections 4 and 5
once again shall be applicable thereafter.

      (e) In  addition,  if any  Change  in  Control  of the  Company  occurs
while this  Agreement is effective,  the Company shall purchase and fully pay
for an annuity policy  sufficient to pay the retirement  benefits  called for
by Section 9 of the N-CDR Agreement and shall transfer  ownership  thereof to
a "rabbi"  trust for the benefit of  Executive  (but subject to the claims of
Company  creditors to the extent  required under  applicable tax laws so that
the  transfer  to the trust will not itself be an event upon which  Executive
recognizes  income for  federal or state  income  tax  purposes).  In lieu of
purchasing  the annuity  policy,  the  Company  may deposit  cash into such a
trust  sufficient to provide,  based on  assumptions  believed  reasonable in
the  written   opinion  of  a   nationally   recognized   employee   benefits
organization,   for  assuring  payment  of  those   retirement   benefits  to
Executive and his spouse.

      (f)   In addition  to payment of the amounts set forth in Section  7(b)
above and the  funding of the  "rabbi"  trust as  provided  in  Section  7(e)
above,  beginning on the  effectiveness  of any  termination of employment to
which Section 7(b) applies,  the Company  shall  compensate  and pay benefits
to and may retain the  consulting  services of Executive in  accordance  with
the  N-CDR  Agreement,  which  shall  become  effective  in  accordance  with
Sections 1 and 19 thereof.

      8.    Retirement.   The  Company  and   Executive   hereby  agree  that
Executive shall retire from full-time  employment with the Company  effective
with the close of  business  on  December  31 of the year in which  Executive
attains  the age of 69, and  beginning  on  January 1 of the next  year,  the
Company will pay Executive  retirement  benefits for his lifetime and for his
spouse's  lifetime,  if his  spouse  survives  him,  in  accordance  with the
applicable  provisions of the N-CDR  Agreement,  which shall become effective
in accordance with Sections 1 and 19 thereof.

      9.    Change in  Employment  Status.  If approved by the  Executive and
the Board of Directors  during the Term of  Employment,  Executive may become
an  independent  consultant  with terms and  conditions of that  relationship
substantially  equal  in all  respects  to  those  set  forth  in  the  N-CDR
Agreement,  which in that event shall  become  effective in  accordance  with
Sections 1 and 19 thereof.
 .
      10.   Expenses  and  Interest.  If the  Company  is found by a court of
competent  jurisdiction  to have breached this  Agreement,  the Company shall
pay the costs and expenses (including  reasonable  attorneys fees and related
expenses)  incurred  by  Executive  in  any  litigation  seeking  damages  in
respect of such breach or to enforce the  performance  of this  Agreement  by
the  Company,  together  with  interest  on  each  installment  of  wages  or
benefits paid late by the Company  calculated  to the date of actual  payment
at an  annual  rate  equal  to 3% over  the  highest  rate  then  paid by the
Company  under its short  term  borrowing  arrangements  with an  independent
institutional  lender  (and if there  is no such  lender,  then 4% above  the
prevailing prime rate as reported in the Wall Street Journal).
 .
      11.   Notices.   Any  notice   required  or   permitted   to  be  given
hereunder  shall be in writing and may be  delivered  personally  or given by
prepaid, certified, return receipt requested, first class mail addressed:

      (a)   if to the  Company,  to at  least  two  members  of the  Board of
Directors at the  addresses  to which the Company  then sends  correspondence
to them;

      (b)   if to  Executive,  at his home  mailing  address on file with the
Company; and

      (c)   to such other  address  as the party to which  such  notice is to
be given shall have  notified  (in  accordance  with the  provisions  of this
Section 11) as its substitute address for the purpose of this Agreement.

      Any notice  given as  aforesaid  shall be deemed  conclusively  to have
been received on the fifth business day after such mailing.

      12.   Amendment.  It is agreed that no change or  modification  of this
Agreement shall be made except in a writing signed by both parties.

      13.   Severability.   In  the  event  that  any  one  or  more  of  the
provisions  of  this  Agreement  shall  be or  become  invalid,  illegal,  or
unenforceable in any respect, the validity,  legality,  and enforceability of
the remaining provisions shall not be affected thereby.

      14.   Law  Governing.  The  validity,  interpretation,  and  effect  of
this Agreement shall be governed by the laws of the State of New York.

      15.   Entire   Agreement.   This   Agreement,   including   the   N-CDR
Agreement,  which is being  executed  simultaneously  herewith,  contains the
entire  understanding  of the  parties  with  respect  to the  employment  of
Executive by the Company.  There are no restrictions,  agreements,  promises,
warranties,  covenants,  or undertakings other than those expressly set forth
herein.  This Agreement  supersedes all prior agreements,  arrangements,  and
understandings  between the parties,  whether  oral or written,  with respect
to the employment of Executive.

      16.   Successors  and  Assigns.  This  Agreement  shall  inure  to  the
benefit  of  and  be  binding  upon  the  heirs,  legatees,   administrators,
successors, and assigns of the respective parties.

      IN  WITNESS  WHEREOF,  Executive,  for  himself,  and  the  undersigned
director  of the  Company,  acting on behalf of the Company by  authority  of
its Board of Directors,  have executed this  Agreement as of the day and year
first above written.


                                          /s/ Karl H. Kostusiak
                                          Karl H. Kostusiak, Executive


                                          DETECTION SYSTEMS, INC.


                                          By: /s/ Donald R. Adair
                                          Donald  R.  Adair, Chairman of the
                                          Compensation Committee of the
                                          Board of Directors

Attachment:
Exhibit  A  -   Non-Competition,   Disability,   and   Retirement
Agreement



                                    EXHIBIT A

            NON-COMPETITION, DISABILITY, AND RETIREMENT AGREEMENT

      AGREEMENT  made  as of the  1st  day of  June,  1999  between  Karl  H.
Kostusiak  ("Executive") and Detection Systems,  Inc., a New York corporation
("Company").  It is  the  intent  that  this  Agreement  will  supersede  the
Employment  Agreement,  dated concurrently  herewith,  upon the occurrence of
one of the contingencies set forth in Section 19 below.

                                 WITNESSETH:

      In  consideration  of  the  mutual  covenants   contained  herein,  the
parties agree as follows:

      1.    Effectiveness  and  Terms.  This  Agreement  shall be  binding on
the parties upon its  execution,  which is  concurrent  with  execution of an
Employment  Agreement  between  the  parties  bearing  the same  date as this
Agreement  (the  "Employment  Agreement"),  and this  Agreement  shall become
effective  when any one of the  contingencies  set forth in Section 19 occurs
(the  "Commencement  Date"  herein).  "Term of  Consulting  Service"  as used
herein  shall  mean  the  period  commencing  on the  Commencement  Date  and
continuing  thereafter  through December 31 of the year in which  Executive's
69th birthday  occurs,  unless the Company and Executive  agree in writing to
extend the Term of Consulting  Service,  in which case the Term of Consulting
Service  shall  have  the  meaning  as  determined  at that  time;  provided,
however,  that Executive's  consulting  services may be earlier terminated as
hereinafter  expressly  set  forth,  in which  event  the Term of  Consulting
Service  shall mean the period from the  Commencement  Date  through the date
of  such  earlier   termination.   Except  as  expressly   provided  in  this
Agreement,  terms defined in that  Employment  Agreement are used herein with
the same meanings.

      2.    Non-Competition.  During  any period  (a) in which  Executive  is
being paid currently the  compensation  called for by Section 3 below, (b) in
which  Executive is being paid currently for disability  benefits as provided
under  Section 11 below,  or (c) in which  Executive is being paid  currently
for retirement  benefits as provided  under Section 9 or 10 below,  Executive
shall not,  without the prior  written  consent of the Board of  Directors of
the  Company,  engage,  as  an  employee,  partner,   consultant,   venturer,
entrepreneur,  or  otherwise,  in the  development  or sale of any product or
service  which is  competitive  with any  product  or  service  sold or under
active development by the Company during the Term of Consulting Service.

      3.    Compensation   for   Non-Competition.    In   consideration   for
Executive's  non-competition  as  provided  in Section 2 above,  the  Company
shall pay and provide to Executive  the following  compensation  and benefits
through December 31 of the year in which Executive attains the age of 69:

      (a)   An  annual   non-competition   fee  equal  to  or  greater   than
$154,500,  that fee to be  increased  each year if and to the  extent the CPI
(defined  below)  has  increased  during  the  preceding  year  (and any fees
earned as a director  of the Company  shall be  credited to that fee),  which
fee shall be paid in full on January 2 of each year;

      (b)   The  Executive  will  not  participate  in any  of the  Company's
executive  incentive  compensation  plans  except  for any such plan or plans
which expressly refer to this Agreement;

      (c)   Grants  of  options  under any  Company  stock  option  plan that
permits  such  options,  in such  amounts as are  determined  by the Board of
Directors or the Committee of the Board administering the plan;

      (d)   Participation   in  Company   pension,   deferred   compensation,
insurance,  health and welfare and other  benefit plans in effect on the date
of this Agreement; and

      (e)   Continuation  of all plans in which the  Executive  participates,
including  existing  fringe  benefits  and  executive  perquisites  to  which
Executive is entitled as of the date  immediately  prior to the  Commencement
Date under this Agreement.

      Beginning  on the January 1 after the year in which  Executive  attains
the age of 69, the  retirement  benefits set forth in Sections 9 and 10 below
shall  be  the  full   consideration   to  be  paid  to  Executive   for  his
non-competition.

      4.    Consulting  Services.  If this Agreement  becomes  effective upon
the  occurrence  of any  contingency  set  forth in  Section  19  other  than
subsection  19(b)  or  (c),  beginning  upon  the  date  of  that  occurrence
Executive  shall  hold  himself   available  to  the  Company  for  providing
consulting   services  to  it  as  an  independent   contractor  at  mutually
agreeable  times and  places;  and the  Company  shall have the right to call
upon  Executive,  so  long  as  Executive  is  able,  for  up  to 8  days  of
consulting services per year to provide  information  concerning matters that
occurred,   were  developed,   or  were  determined  while  Executive  was  a
full-time or  part-time  employee of the Company.  Unless  otherwise  agreed,
those  consulting  services  shall be rendered  at a place and time  mutually
agreed (but within 25 miles of  Executive's  residence at the time) and shall
be paid at the  rate of  $1,500  per day (or up to 100  hours  of  consulting
services  per  year  at  an  hourly  rate  to  be  agreed  upon).  Any  other
consulting  services  shall be  provided  if,  as, and when the  parties  may
agree.

      Notwithstanding  any of the other  provisions  of this  Agreement,  the
Term of Consulting  Services will  automatically  terminate upon  Executive's
death and thereupon all payments and non-vested  benefits  payable  hereunder
and under  Section 3 above shall  cease,  except for any death  benefits  and
any survivor  benefits for his spouse which are provided  under the Company's
employee  plans and except for the  retirement  benefits set forth in Section
9  for  any  surviving  spouse.  Those  retirement  benefits  shall  be  paid
pursuant to Section 9 commencing  after  Executive's 69th birthday would have
occurred,  except  that the  surviving  spouse may elect,  by written  notice
given to the Company's  President or Secretary,  to receive early  retirement
benefits  as provided in Section 10 below,  in which case the  provisions  of
Section  9 below  shall  apply,  except  that  the  initial  retirement  wage
benefit shall be calculated as provided in Section 10.

      The  Company  may  terminate  Executive's  consulting  services  due to
Executive's  permanent  disability,  as  determined by the Board of Directors
in  good  faith  based  on the  certification  of an  independent  M.D.,  and
thereupon  all  payments  and  non-vested  benefits  under this Section 4 and
under  Section  3 shall  cease  except  that the  disability  and  retirement
benefits  shall be paid in accordance  with the provisions of Sections 9, 10,
and 11 below.

      5.    Executive's   Acceptance.   Executive   agrees  to  provide   the
consulting  services  described in this Agreement.  Executive  further agrees
that he will devote his reasonable  efforts during reasonable  business hours
to performance  of the  consulting  services set forth herein during the Term
of Consulting Service.

      6.    [Intentionally left blank]

      7.    Termination  for Cause.  The  Company may  terminate  Executive's
consulting  services  immediately  and without  prior notice to Executive for
"Cause" as defined  below.  The  existence  of Cause shall be  determined  by
the  Company's  Board of  Directors  (other  than  Executive)  acting in good
faith.   "Cause"  is  defined,   and  shall  be  limited  to,  a  good  faith
determination  by the  Board  of  Directors  that  any of the  following  has
occurred:

      (a)   Executive  has  knowingly   misappropriated  for  his  benefit  a
material amount of funds or property of the Company;

      (b)   Executive  has  obtained  a  material  personal  profit  from any
illegal Company transaction with a third party;

      (c)   Executive  has obtained a material  personal  profit from the use
of the Company's trade secrets other than on its behalf; or

      (d)   The Company has suffered  material  financial harm from knowingly
illegal  action by Executive  other than on the  Company's  behalf or for its
benefit.

      If  Executive's  consulting  services are terminated by the Company for
Cause,  he  shall  continue  to be paid  compensation  and  benefits  for his
non-competition  in  accordance  with the  provisions  of Section 3 above and
retirement  benefits in  accordance  with Section 9 and, if elected,  Section
10 below,  provided that his cash compensation  (including retirement benefit
payments  to be  provided  under  this  Agreement)  shall be  reduced  by the
amount of any monetary  damage  suffered by the Company due to the Cause,  as
determined  by  a  court  of  competent   jurisdiction,   prorated  over  the
actuarially   determined  term  of  all  such  payments   beginning  on  such
determination.

      8.    Resignation.   Executive   may   voluntarily   resign   from  his
consulting  services  with the Company by giving  written  notice  thereof to
the  Company's  President  or  Secretary,  but no  resignation  shall  affect
Executive's  obligation to provide the minimum  consulting  services provided
for in the second sentence of Section 4 above.

      9.    Retirement.  The Company hereby agrees that, if not ended
sooner, the Term of Service as used in the Employment Agreement shall end
at the close of business on December 31 of the year in which Executive
attains the age of 69, and beginning on the opening of business on January
1 of the next year (and regardless whether the Term of Service ended prior
to that December 31), the Company will pay Executive retirement benefits
for his lifetime and for his spouse's lifetime, if his spouse survives him,
as follows:

      (a)   a  retirement  wage  benefit  initially  equal to 30% of the base
salary rate being paid to  Executive  at the end of his full time  employment
with the  Company,  increased  for each  year  after the end of his full time
employment  by any  increase in the CPI (as defined  below),  except that the
retirement  wage  benefit  shall be equal to 60% of that base  salary rate at
the end of  Executive's  full  time  employment  with the  Company,  plus CPI
increases,  effective for any  retirement  year after a Change in Control and
after either  Executive  is no longer a full time  employee of the Company or
Executive  or the  Company  has  given the  notice  provided  for in  Section
20(b)(ii)  below,  and except that the retirement wage benefit for his spouse
shall be 75% of the amount  thus  calculated  for each year after the year of
Executive's death;

      (b)   continuation  of Executive's  participation  (for himself and his
spouse)  in the  health  program  in  effect  on the  date of this  Agreement
(including   for  dental   and  eye  care   coverage,   an  annual   physical
examination, and similar benefits); and

      (c)   continuation   of  all  other   benefits   provided  at  time  of
retirement,  such continuation  limited in individual  benefit cost to 60% of
the  maximum  annual  cost of such  benefit in any year prior to  retirement,
plus CPI increases,

      For these purposes:

            (1)   unless  otherwise  agreed  or  directed  by law or a court,
"spouse"  shall mean the person to whom  Executive is married at the time any
benefit  is to be paid,  or,  after  Executive's  death,  the  person to whom
Executive was married at the time of his death;

            (2)   "CPI" shall mean the Consumer  Price Index,  all Urban Wage
Earners as  determined by the United  States  Department of Labor,  Bureau of
Labor Statistics,  or any successor  governmental agency or, lacking any such
successor,  any other  authoritative  source  designated in good faith by the
Board of  Directors;  and the wage benefit shall be increased as of January 1
each year by  multiplying  the wage benefit paid during the previous  year by
any fraction  greater than one  calculated  by dividing the CPI most recently
computed  and  available  at the end of that  previous  year by the CPI  most
recently  computed  and  available  at the end of the year  previous to that;
the CPI shall not be used to decrease the wage benefit.

      The parties agree:  (x) that the foregoing  retirement  benefits are in
addition  to  any  other  retirement   benefits  that  may  be  available  to
Executive  (such as the Company's  401(k) savings plan),  (y) that payment of
these  retirement  benefits may be  terminated  if a court of law  determines
that Executive has violated the  provisions of Section 2 above,  and (z) that
the Company will  purchase and maintain  life  insurance  sufficient  to fund
the  estimated  benefits  for  Executive's  spouse  (estimated  no later than
Executive's  retirement date; any excess policy proceeds to be available,  if
agreed,   to  purchase   shares  of  the  Company's   Common  Stock  held  in
Executive's  estate) and the policy or policies  of such  insurance  shall be
held in trust designated for this purpose.

      (d)   The  retirement  benefits  provided under this Section 9 (and, if
applicable,  Section 10) shall be paid as provided herein regardless  whether
the  Company  has  any  claims  against  Executive  for  default  under  this
Agreement  or for any  other  breach  of duty or  otherwise,  and,  except as
otherwise   provided  in  Section  7  above,  the  Company  shall  pay  those
retirement  benefits  as  provided  and  must  pursue  remedies  for any such
default or other breach of duty or other claim separately and independently.

      10.  Early  Retirement  Benefits.   The  parties  agree  that,  in  the
circumstances   expressly  provided  in  this  Agreement,   Executive  and/or
Executive's  spouse  shall be paid early  retirement  benefits in  accordance
with the following:

      (a) The  provisions  of Section 9 shall  apply to  Executive's  and the
spouse's  retirement  benefits  as  provided  therein,  except  as  expressly
modified  by this  Section  10,  and  shall  be paid  beginning  at the  time
payment of the early retirement  benefits  actually  commences as provided in
this Agreement;

      (b) The initial  retirement  wage  benefit  shall not be the amount set
forth in Section 9(a) above,  but shall be  calculated  as follows:  multiply
the initial  retirement  wage benefit  (calculated in accordance with Section
9(a) above) by the  actuarially  determined  number of years it would be paid
during  Executive's  then  actuarially  determined  remaining  lifespan as if
Executive's  69th birthday had just occurred;  then divide that amount by the
number  of  years  then  actuarially  determined  to  be  Executive's  actual
expected  remaining  lifespan  based  on his  actual  age at that  time.  The
amount thus  calculated  shall be the initial annual  retirement wage benefit
for purposes of Section 9(a) above.

      11.   Disability.   If  Executive  is  determined  to  be   permanently
disabled  in  accordance  with  the  provisions  of  Section  4 above  or the
provisions  of  Section 1 of the  Employment  Agreement,  Executive  shall be
paid  disability  benefits from that date through  December 31 of the year in
which  Executive  attains the age of 69, which  disability  benefits shall be
equal  to the  non-competition  compensation  and  benefits  and the  minimum
consulting  fees that would have been paid to Executive  pursuant to Sections
3 and 4 above if he had not become  disabled,  provided  that,  to the extent
the disability  wage benefits are not taxable  income to Executive  under the
U.S.  Internal  Revenue  Code of 1986,  as amended,  the  disability  benefit
amount  shall  equal 60% of the  compensation  and fees that  would have been
paid pursuant to Sections 3 and 4 above.

      12.  Stock  Transfers by Executive  and  Executive's  Estate and Heirs.
So long as this Agreement is in effect,  Executive  shall not sell any shares
of Company  Common  Stock except (a) in  transactions  approved in advance by
the  Company's  Board of Directors or (b) pursuant to all the  conditions  of
Rule 144  promulgated  by the Securities  and Exchange  Commission  under the
Securities Act of 1933, as amended (or any rule thus  promulgated  which is a
successor to Rule 144); provided,  however,  that no such sales shall be made
in any block trade or when there is any tender  offer  pending  with  respect
to any  securities  issued by the Company or there is any  program  announced
by any person  other than the  Company  to  acquire  shares of the  Company's
Common Stock.  Executive  agrees that  restrictive  legends  referring to the
provisions  of  this  Section  12  shall  be  placed  upon  all  certificates
representing  shares to which this  Section 12  applies.  The  provisions  of
this  Section 12 shall  terminate  upon any Change in Control or  Executive's
death, whichever may first occur and shall not apply thereafter.

      13.   Expenses  and  Interest.  If the  Company  is found by a court of
competent  jurisdiction  to have breached this  Agreement,  the Company shall
pay the costs and expenses (including  reasonable  attorneys fees and related
expenses)  incurred  by  Executive  in  any  litigation  seeking  damages  in
respect of such breach or to enforce the  performance  of this  Agreement  by
Company,  together  with  interest on each  installment  of wages or benefits
paid  late by the  Company  calculated  to the date of actual  payment  at an
annual  rate  equal to 3% over the  highest  rate  then  paid by the  Company
under  its   short   term   borrowing   arrangements   with  an   independent
institutional  lender  (and if there  is no such  lender,  then 4% above  the
prevailing prime rate as reported in the Wall Street Journal).

      14.   Notices.   Any  notice   required  or   permitted   to  be  given
hereunder  shall be in writing and may be  delivered  personally  or given by
prepaid, certified, return receipt requested, first class mail addressed:

      (a)   if to the  Company,  to at  least  two  members  of the  Board of
Directors,  c/o the  Company's  Secretary  at the  address  of the  Company's
principal office;

      (b)   if to  Executive,  at his home  mailing  address on file with the
Company; and

      (c)   to such other  address  as the party to which  such  notice is to
be given shall have  notified  (in  accordance  with the  provisions  of this
Section 14) as its substitute address for the purpose of this Agreement.

      Any notice  given as  aforesaid  shall be deemed  conclusively  to have
been received on the fifth business day after such mailing.

      15.   Amendment.  It is agreed that no change or  modification  of this
Agreement shall be made except in a writing signed by both parties.

      16.   Severability.   In  the  event  that  any  one  or  more  of  the
provisions  of  this  Agreement  shall  be or  become  invalid,  illegal,  or
unenforceable in any respect, the validity,  legality,  and enforceability of
the remaining provisions shall not be affected thereby.

      17.   Law  Governing.  The  validity,  interpretation,  and  effect  of
this Agreement shall be governed by the laws of the State of New York.

      18.   Entire   Agreement.    This   Agreement   contains   the   entire
understanding  of the  parties  with  respect to the  consulting  services of
Executive  by the  Company  during the Term of  Consulting  Service  and with
respect to non-competition  and disability and retirement  benefits (but does
not  affect  pension  and  other  benefit  plans  and  arrangements  in which
Executive  participates).  There are no restrictions,  agreements,  promises,
warranties,  covenants,  or undertakings other than those expressly set forth
herein with respect to the Term of Consulting  Service.  Upon the  occurrence
of one of  the  contingencies  set  forth  in  Section  19  below,  as of the
Commencement   Date  this   Agreement   supersedes   all  prior   agreements,
arrangements,  and  understandings  between  the  parties,  whether  oral  or
written,  with respect to employment  or consulting  services of Executive on
and after the  Commencement  Date.  Thus,  whenever  this  Agreement  becomes
effective,  the  provisions of the  Employment  Agreement  shall no longer be
effective except for any claims that may have accrued thereunder.

      19.   Contingencies.    (a)   This   Agreement   shall   be   effective
immediately upon the occurrence of any one of the following:

      (a)   Upon the end of the five  year Term of  Service  as  provided  in
Section 1 of the Employment Agreement;

      (b)   Upon   Executive's   death  as  provided  in  Section  1  of  the
Employment Agreement;

      (c)   Upon  Executive's  permanent  disability as provided in Section 1
of the Employment Agreement;

      (d)   At  the  end  of  the  period  specified  in  Section  4  of  the
Employment  Agreement  after  termination of Executive's  employment  without
Cause;

      (e)   At  the  end  of  the  period  specified  in  Section  5  of  the
Employment Agreement after termination of Executive's employment for Cause;

      (f)   Upon any  voluntary  resignation  by  Executive  from  full  time
employment  with the  Company  prior to a Change in  Control as  provided  in
Section 6 of the Employment Agreement;

      (g)   Upon  the   effectiveness   of  any  termination  of  Executive's
employment  after a  Change  in  Control  as  provided  in  Section  7 of the
Employment Agreement;

      (h)   Upon  Executive's  retirement  as  provided  in  Section 8 of the
Employment Agreement; or

      (i)   Upon any  change  of  Executive's  employment  status  to that of
independent consultant as provided in Section 9 of the Employment Agreement.

      20.   Change in Control.

      (a)   A "Change  in  Control"  of the  Company  shall be deemed to have
      occurred if:

                  (1)   any  "person,"  as such  term  is  used  in  Sections
            13(d)  and  14(d) of the  Securities  Exchange  Act of  1934,  as
            amended  (the  "Exchange  Act")  (other  than the  Company or any
            corporation  owned,  directly or indirectly,  by the shareholders
            of the Company in  substantially  the same  proportions  as their
            ownership   of  stock  of  the   Company),   is  or  becomes  the
            "beneficial  owner" (as defined in Rule 13d-3 under the  Exchange
            Act),  directly  or  indirectly,  of  securities  of the  Company
            representing  25% or more of the  combined  voting  power  of the
            Company's then outstanding securities;

                  (2)   there is  elected  35% or more of the  members of the
            Board of  Directors  of the Company  without the  approval of the
            nomination  of such  members by a majority  of the Board  serving
            prior to such election;

                  (3)   the  shareholders  of the Company approve a merger or
            consolidation  of the Company with any other  corporation,  other
            than (i) a merger  or  consolidation  which  would  result in the
            voting  securities of the Company  outstanding  immediately prior
            thereto  continuing  to  represent  more than 75% of the combined
            voting power of the voting  securities  of the  Company,  or such
            surviving  entity,  outstanding  immediately after such merger or
            consolidation;  or (ii) a merger  or  consolidation  effected  to
            implement   a   recapitalization   of  the  Company  (or  similar
            transaction)  in which no "person"  (as defined  above)  acquires
            more  than 25% of the  combined  voting  power  of the  Company's
            then-outstanding securities; or

                  (4)   The   shareholders   of  the   Company   approve   an
            agreement for the sale or  disposition  by the Company and all or
            substantially all of the Company's assets.

            (b)   If:

                    (i)   any Change in Control of the Company  occurs  while
                  this  Agreement  is effective, and

                    (ii)  Executive  gives  notice to the Company or the Company
                  (acting  upon a determination  of its Board of  Directors)
                  gives notice to Executive,  in  either  case  to the  effect
                  that  the six month period  called for by this Section  20(b)
                  shall begin to run, and

                    (iii)  Executive's  consulting  services  are  terminated
                  by Executive or by the Company (other  than  for Executive's
                  death or disability)  within  six  months after the date the
                  notice provided for in (ii) above is  received (in Executive's
                  case the  termination  being  effected by Executive  giving
                  notice  within that six month period,  effective  within 30
                  days  after  the  notice  is  given,  that  his  consulting
                  services  are  terminated  to the  extent  permitted  under
                  Section  4  above),  regardless  the  reason,  if any,  and
                  regardless  which  party  gave the notice  provided  for in
                  (ii) above,

then the  Company  shall,  upon  receipt  of said  notice,  immediately  pay,
transfer,  and provide to Executive  the  following  amounts,  benefits,  and
assets:

                  (1)   The  Company  shall  pay  to  Executive  the  sum  of
            Executive's   full   non-competition   compensation  and  minimum
            consulting  fees through the  effective  date of  termination  of
            his  consulting  services  at the rate in  effect  at the time of
            termination  or  at  the  time  the  Change  in  Control  occurs,
            whichever  is  higher,  and an amount  equal to the amount of any
            bonus  which  has  been  earned  by him but not yet  paid to him.
            These  two  amounts  shall  be paid to  Executive  in a lump  sum
            within five days  following  the effective  date of  termination,
            or in the case of a bonus  which  is not  readily  calculable  at
            that time, within five days after the bonus can be calculated.

                  (2)   The Company  shall pay to  Executive  an amount equal
            to three times the  highest  total cash  compensation  (including
            any  base  salary,  non-competition  compensation,  bonuses,  and
            consulting  fees) paid  Executive  in any of the  Company's  last
            three  fiscal years  completed  prior to such  termination.  This
            amount  shall  be paid  to  Executive  as  provided  in the  last
            sentence of subsection (1) above.

                  (3)   The Company  shall pay to  Executive  an amount equal
            to the total  amounts  that would be expended for the benefits to
            be provided  Executive  under  Section 3 above on the  assumption
            that   Executive   will   continue   to   be   compensated    for
            non-competition  for  three  years  after the  termination.  This
            amount  shall  be paid  to  Executive  as  provided  in the  last
            sentence of  subsection  (1) above  either in cash or in the form
            of  an  annuity  contract  issued  by  an  independent  insurance
            company  licensed to do  business  in New York that will  provide
            payment of all such total amounts.

                  (4)   All  options  and other  rights  that  Executive  may
            hold  to  purchase  or  otherwise  acquire  Common  Stock  of the
            Company  shall  immediately  become  exercisable  in full for the
            total  number  of  shares  that are or might  become  purchasable
            thereunder,   in  each  case   without   further   condition   or
            limitation  except  the  giving  of notice  of  exercise  and the
            payment of the purchase price  thereunder (but without  amendment
            of the plan under  which they were  issued).  At his  discretion,
            Executive  may elect to  surrender  to the  Company his rights in
            any  such  options  and  rights  held  by  him  and,   upon  that
            surrender,  the Company  shall pay him an amount in cash equal to
            the  aggregate  spread  between the exercise  prices of all those
            options   and  rights   and  the  value  of  the   Common   Stock
            purchasable  thereunder  (or of any other security into which the
            Common Stock has been  exchanged or  converted) as of the date of
            the  termination  of  consulting   services,   the  value  to  be
            determined  by the  reported  last sale price of the Common Stock
            or that other  security (or the mean  between the  reported  last
            bid and asked  prices) on that date on NASDAQ  (or,  if it is not
            NASDAQ,  on  whatever  may  then  be the  principal  exchange  or
            quotation  system on which  the  Company's  Common  Stock or that
            other security is traded at that time).

                  (5)   The Company  shall repay any policy loans  previously
            taken on the life insurance  policies on Executive's  life listed
            on  Exhibit A  attached  to the  Employment  Agreement  (provided
            that the  directors  of the  Company  were given  written  notice
            promptly  after the  making  of any such  loans  which  were made
            while   Executive  was  the  chief   executive   officer  of  the
            Company),  and then shall  transfer to  Executive  any and all of
            its right,  title,  and  interest in and to those  policies  (and
            upon that  transfer,  Executive  shall be deemed to have released
            the Company from any and all  obligations  it then owes to him to
            maintain   and  pay  premiums  on  those   policies,   all  other
            provisions  of any  agreements  under which those  policies  were
            agreed to be maintained, however, to remain in effect).

                  (6)   In addition to the amounts  specified  in clauses (1)
            through  (5) of this  paragraph  (b),  the  Company  shall pay to
            Executive,  at the  same  time as  those  amounts  are  paid,  an
            additional  amount which,  after taking into account all federal,
            state,  and local  income and  excise  taxes  that  Executive  is
            required  to pay  with  respect  to  receipt  of  the  additional
            amount  under this  clause  (6),  will  render the net  after-tax
            payment to Executive under this clause (6) equal to the sum of:

                        (A)   all  federal,  state,  and local  excise  taxes
                  that  Executive  is  required  to pay with  respect  to the
                  payments  made  pursuant  to clauses (1) through (5) above;
                  and

                        (B)   all  federal,   state,  and  local  income  and
                  excise  taxes  that  Executive  is  required  to  pay  with
                  respect to the payment made pursuant to this clause (6).

            The  foregoing  amounts of federal,  state,  and local income and
            excise  taxes  shall  be  determined  initially  by a  nationally
            recognized  firm of independent  public  accountants  retained by
            Executive  at  his  expense  or,  at   Executive's   option,   by
            independent  public  accountants  at the Company's  expense,  and
            such  determination  and the basis therefor shall be furnished in
            writing to Executive  and the Company.  Payment  shall be made by
            the  Company  in  accordance  with  that  initial   determination
            regardless   whether   there  is  a  dispute  over  the  accuracy
            thereof.  If either party  disputes  that  initial  determination
            the  matter   shall   promptly  be   referred  to  a   nationally
            recognized  firm of independent  public  accountants  selected by
            the  Executive  (which  firm shall not have been  involved in the
            initial  determination),  and  Executive  and the  Company  shall
            promptly  furnish to that firm such  information as it reasonably
            requests.  The  Company  shall  make such  additional  payment to
            Executive or Executive  shall refund to the Company,  as the case
            may be,  in  accordance  with the  latter  firm's  determination.
            The  fees  and  expenses  of that  firm  shall  be  borne  by the
            Company.

            (c)   The  Company  may   withhold   from  any  payments  due  to
Executive  under  paragraph  (b)  such  amounts  as  its  independent  public
accountants  may  determine  are  required  to be withheld  under  applicable
federal, state, and local tax laws.

            (d)   If  applicable,  the  provisions  of this  Section 20 shall
control  over the  provisions  of Section  7. In the event  that  Executive's
consulting  services  are not  terminated  by the  Company  or the  Executive
within the six month period  specified in Section  20(b),  the  provisions of
Section 7 once again shall be applicable thereafter.

            (e) In  addition,  if  any  Change  in  Control  of  the  Company
occurs while this  Agreement is  effective,  the Company  shall  purchase and
fully pay for an annuity  policy  sufficient to pay the  retirement  benefits
called  for by  Section  9 of this  Agreement  and shall  transfer  ownership
thereof to a "rabbi"  trust for the benefit of Executive  (but subject to the
claims of Company  creditors  to the extent  required  under  applicable  tax
laws so that the  transfer  to the trust  will not  itself  be an event  upon
which   Executive   recognizes   income  for  federal  or  state  income  tax
purposes).  In lieu  of  purchasing  the  annuity  policy,  the  Company  may
deposit cash into such a trust  sufficient to provide,  based on  assumptions
believed  reasonable  in  the  written  opinion  of a  nationally  recognized
employee  benefits  organization,  for assuring  payment of those  retirement
benefits to Executive and his spouse.

      (f)   Payment of the  amounts  called for by this  Section 20 shall not
affect the  Company's  obligation  to pay  non-competition  compensation  and
benefits  under Section 3 above or retirement  benefits  under Section 9 and,
if elected by Executive, Section 10 above.

      21.   Successors  and  Assigns.  This  Agreement  shall  inure  to  the
benefit  of  and  be  binding  upon  the  heirs,  legatees,   administrators,
successors, and assigns of the respective parties.

      IN  WITNESS  WHEREOF,   Executive  for  himself,  and  the  undersigned
director  of the  Company,  acting on behalf of the Company by  authority  of
its Board of Directors,  have executed this  Agreement as of the day and year
first above written.

                                          /s/ Karl H. Kostusiak
                                          Karl H. Kostusiak, Executive


                                          DETECTION SYSTEMS, INC.

                                          By:  /s/ Donald R. Adair
                                          Donald R. Adair, Chairman of the
                                          Compensation Committee of the
                                          Board of Directors

PART-TIME EMPLOYMENT, NON-COMPETITION, DISABILITY, AND RETIREMENT AGREEMENT

      AGREEMENT made as of the 1st day of June, 1999, between David B.
Lederer ("Executive") and Detection Systems, Inc., a New York corporation
("Company").

                                 WITNESSETH:
      In consideration of the mutual covenants contained herein, the
parties agree as follows:

            1.    Effectiveness and Terms.  This Agreement shall be binding
on the parties as of its date set forth above (the "Commencement Date"
herein).  "Term of Employment" as used herein shall mean the period
commencing on the Commencement Date and continuing thereafter through
December 31 of the year in which Executive's 69th birthday occurs, unless
the Company and Executive agree in writing to extend the Term of
Employment, in which case the Term of Employment shall have the meaning as
determined at that time; provided, however, that Executive's employment
services may be earlier terminated as hereinafter expressly set forth or as
may be agreed between Executive and the Company, in which event the Term of
Employment shall mean the period from the Commencement Date through the
date of such earlier termination (but such a termination shall not affect
Executive's obligation to provide minimum consulting services as provided
in Section 5 below).

      2.    Non-Competition.  During any period (a) in which Executive is
being paid currently for employment services as provided in Section 4
below, (b) in which Executive is being paid currently the compensation
called for by Section 3 below, (c) in which Executive is being paid
currently for disability benefits as provided under Section 11 below, or
(d) in which Executive is being paid currently for retirement benefits as
provided under Section 9 or 10 below, Executive shall not, without the
prior written consent of the Board of Directors of the Company, engage, as
an employee, partner, consultant, venturer, entrepreneur, or otherwise, in
the development or sale of any product or service which is competitive with
any product or service sold or under active development by the Company
during the Term of Employment.

      3.    Compensation for Non-Competition.  After the Term of Employment
has ended, in consideration for Executive's non-competition as provided in
Section 2 above, the Company shall pay and provide to Executive the
following compensation and benefits through December 31 of the year in
which Executive attains the age of 69:
      (a)   An annual non-competition fee equal to or greater than
$123,600, that fee to be increased each year if and to the extent the CPI
(defined below) has increased during the preceding year (and any fees
earned as a director of the Company shall be credited to that fee), which
fee shall be paid in full on January 2 of each year;
      (b)   The Executive will not participate in any of the Company's
executive incentive compensation plans except for any such plan or plans
which expressly refer to this Agreement;
      (c)   Grants of options under any Company stock option plan that
permits such options, in such amounts as are determined by the Board of
Directors or the Committee of the Board administering the plan;
      (d)   Participation in Company pension, deferred compensation,
insurance, health and welfare and other benefit plans in effect on the date
of this Agreement; and
      (e)   Continuation of all plans in which the Executive participates,
including existing fringe benefits and executive perquisites to which
Executive is entitled as of the date immediately prior to the Commencement
Date under this Agreement.
      Beginning on the January 1 after the year in which Executive attains
the age of 69, the retirement benefits set forth in Sections 9 and 10 below
shall be the full consideration to be paid to Executive for his
non-competition.

      4.    Employment.  The Company hereby employs Executive in the
capacity of Vice President, Business Development for the Term of Employment
commencing on the Commencement Date.  The Company agrees to provide
Executive with such offices and such operational and administrative support
as is consistent with his position and responsibilities under this
Agreement.  The compensation and benefits which the Company shall provide
Executive for his services during the Term of Employment shall include, but
not be limited to, (a) base salary equal to or greater than $134,195
(including directors fees, if applicable) and (b) the benefits listed in
clauses (b), (c), (d), and (e) of Section 3 above.  Executive agrees that
he will devote approximately half time and his best efforts during
reasonable business hours to performance of the duties and responsibilities
of his office during the Term of Employment.  Executive also agrees not to
disclose trade secrets of the Company, or to engage in any other activity
which is detrimental to the interests of the Company, during the Term of
Employment.

      Notwithstanding any of the other provisions of this Agreement, the
Term of Employment will automatically terminate upon Executive's death and
thereupon all payments and non-vested benefits payable hereunder and under
Section 3 above shall cease, except for any death benefits and any survivor
benefits for his spouse which are provided under the Company's employee
plans and except for the retirement benefits set forth in Section 9 for any
surviving spouse.  Those retirement benefits shall be paid pursuant to
Section 9 commencing after Executive's 69th birthday would have occurred,
except that the surviving spouse may elect, by written notice given to the
Company's President or Secretary, to receive early retirement benefits as
provided in Section 10 below, in which case the provisions of Section 9
below shall apply, except that the initial retirement wage benefit shall be
calculated as provided in Section 10.

      The Company may terminate Executive's services due to Executive's
permanent disability, as determined by the Board of Directors in good faith
based on the certification of an independent M.D., and thereupon all
payments and non-vested benefits under this Section 4 and under Section 3
shall cease except that the disability and retirement benefits shall be
paid in accordance with the provisions of Sections 9, 10, and 11 below.

      5.    Minimum Consulting Services.  After a termination of
Executive's services pursuant to Section 7, 8, or 9 below, the Company shall
nevertheless have the right to call upon Executive, so long as Executive is
able, for up to 8 days of consulting services per year to provide
information concerning matters that occurred, were developed, or were
determined while Executive was a full-time or part-time employee of the
Company.  Unless otherwise agreed, these consulting services shall be
rendered at a place and time mutually agreed (but within 25 miles of
Executive's residence at the time) and shall be paid at the rate of $1,200
per day (or up to 100 hours of consulting services per year at an hourly
rate to be agreed upon).  Any other consulting services shall be provided
if, as, and when the parties may agree.

      6.    Executive's Acceptance.  Executive agrees to provide the
employment and the consulting services described in this Agreement.

      7.    Termination for Cause.  The Company may terminate Executive's
services immediately and without prior notice to Executive for "Cause" as
defined below.  The existence of Cause shall be determined by the Company's
Board of Directors (other than Executive) acting in good faith.  "Cause" is
defined, and shall be limited to, a good faith determination by the Board
of Directors that any of the following has occurred:

      (a)   Executive has knowingly misappropriated for his benefit a
material amount of funds or property of the Company;

      (b)   Executive has obtained a material personal profit from any
illegal Company transaction with a third party;

      (c)   Executive has obtained a material personal profit from the use
of the Company's trade secrets other than on its behalf; or

      (d)   The Company has suffered material financial harm from knowingly
illegal action by Executive other than on the Company's behalf or for its
benefit.

      If Executive's services are terminated by the Company for Cause, he
shall continue to be paid compensation and benefits for his non-competition
in accordance with the provisions of Section 3 above, for any minimum
consulting services provided pursuant to Section 5 above, and retirement
benefits in accordance with Section 9 and, if elected, Section 10 below,
provided that his cash compensation (including retirement benefit payments
to be provided under this Agreement) shall be reduced by the amount of any
monetary damage suffered by the Company due to the Cause, as determined by
a court of competent jurisdiction, prorated over the actuarially determined
term of all such payments beginning on such determination.

      8.    Resignation.  If, at any time prior to Executive's retirement
as provided in Section 9 below, Karl H. Kostusiak is no longer employed as
the full time senior executive officer of the Company, Executive shall have
the option of resigning from his employment obligations under Section 4 of
this Agreement by giving written notice thereof to the Company's President
or Secretary, but no resignation shall affect Executive's obligation to
provide the minimum consulting services provided for in Section 5 above.

      9.    Retirement.  The Company hereby agrees that, if not ended
sooner, the Term of Employment as used in this Agreement shall end at the
close of business on December 31 of the year in which Executive attains the
age of 69, and beginning on the opening of business on January 1 of the
next year (and regardless whether the Term of Employment ended prior to
that December 31), the Company will pay Executive retirement benefits for
his lifetime and for his spouse's lifetime, if his spouse survives him, as
follows:

      (a)   a retirement wage benefit initially equal to 30% of the base
salary rate being paid to Executive at the end of his full time employment
with the Company, increased for each year after the end of his full time
employment by any increase in the CPI (as defined below), except that the
retirement wage benefit shall be equal to 60% of that base salary rate at
the end of Executive's full time employment with the Company, plus CPI
increases, effective for any retirement year after a Change in Control and
after the conditions described in Section 20(b)(ii) below have occurred
which would allow Executive to give the notice described there
(disregarding his retirement, if any), and except that the retirement wage
benefit for his spouse shall be 75% of the amount thus calculated for each
year after the year of Executive's death;

      (b)   continuation of Executive's participation (for himself and his
spouse) in the health program in effect on the date of this Agreement
(including for dental and eye care coverage, an annual physical
examination, and similar benefits); and

     (c)   continuation of all other benefits provided at time of retirement,
            such continuation limited in individual benefit cost to 60% of
            the maximum annual cost of such benefit in any year prior to
            retirement, plus CPI increases,

      For these purposes:

            (1)   unless otherwise agreed or directed by law or a court,
"spouse" shall mean the person to whom Executive is married at the time any
benefit is to be paid, or, after Executive's death, the person to whom
Executive was married at the time of his death;

            (2)   "CPI" shall mean the Consumer Price Index, all Urban Wage
Earners as determined by the United States Department of Labor, Bureau of
Labor Statistics, or any successor governmental agency or, lacking any such
successor, any other authoritative source designated in good faith by the
Board of Directors; and the wage benefit shall be increased as of January 1
each year by multiplying the wage benefit paid during the previous year by
any fraction greater than one calculated by dividing the CPI most recently
computed and available at the end of that previous year by the CPI most
recently computed and available at the end of the year previous to that;
the CPI shall not be used to decrease the wage benefit.

      The parties agree: (x) that the foregoing retirement benefits are in
addition to any other retirement benefits that may be available to
Executive (such as the Company's 401(k) savings plan), (y) that payment of
these retirement benefits may be terminated if a court of law determines
that Executive has violated the provisions of Section 2 above, and (z) that
the Company will purchase and maintain life insurance sufficient to fund
the estimated benefits for Executive's spouse (estimated no later than
Executive's retirement date; any excess policy proceeds to be available, if
agreed, to purchase shares of the Company's Common Stock held in
Executive's estate) and the policy or policies of such insurance shall be
held in trust designated for this purpose.

      (d)   The retirement benefits provided under this Section 9 (and, if
applicable, Section 10) shall be paid as provided herein regardless whether
the Company has any claims against Executive for default under this
Agreement or for any other breach of duty or otherwise, and, except as
otherwise provided in Section 7 above, the Company shall pay those
retirement benefits as provided and must pursue remedies for any such
default or other breach of duty or other claim separately and independently.

      10.  Early Retirement Benefits.  The parties agree that, in the
circumstances expressly provided in this Agreement, Executive and/or
Executive's spouse shall be paid early retirement benefits in accordance
with the following:

      (a)  The provisions of Section 9 shall apply to Executive's and the
spouse's retirement benefits as provided therein, except as expressly
modified by this Section 10, and shall be paid beginning at the time
payment of the early retirement benefits actually commences as provided in
this Agreement;

      (b)  The initial retirement wage benefit shall not be the amount set
forth in Section 9(a) above, but shall be calculated as follows:  multiply
the initial retirement wage benefit (calculated in accordance with Section
9(a) above) by the actuarially determined number of years it would be paid
during Executive's then actuarially determined remaining lifespan as if
Executive's 69th birthday had just occurred; then divide that amount by the
number of years then actuarially determined to be Executive's actual
expected remaining lifespan based on his actual age at that time.  The
amount thus calculated shall be the initial annual retirement wage benefit
for purposes of Section 9(a) above.

      11.  Disability.  If Executive is determined to be permanently
disabled in accordance with the provisions of Section 4 above, Executive
shall be paid disability benefits from that date through December 31 of the
year in which Executive attains the age of 69, which disability benefits
shall be equal to the non-competition compensation and benefits and the
salary that would have been paid to Executive pursuant to Sections 3 and 4
above if he had not become disabled, provided that, to the extent the
disability wage benefits are not taxable income to Executive under the U.S.
Internal Revenue Code of 1986, as amended, the disability benefit amount
shall equal 60% of the compensation and salary that would have been paid
pursuant to Sections 3 and 4 above.

      12.  Stock Transfers by Executive and Executive's Estate and Heirs.
So long as this Agreement is in effect, Executive shall not sell any shares
of Company Common Stock except (a) in transactions approved in advance by
the Company's Board of Directors or (b) pursuant to all the conditions of
Rule 144 promulgated by the Securities and Exchange Commission under the
Securities Act of 1933, as amended (or any rule thus promulgated which is a
successor to Rule 144); provided, however, that no such sales shall be made
in any block trade or when there is any plan, program, or tender offer
announced by any person other than the Company to acquire shares of the
Company's Common Stock and that person was required to file a statement,
schedule, or other report with respect thereto with the U.S. Securities and
Exchange Commission under Section 13 or 14 of the Securities Exchange Act
of 1934, as amended, or the rules and regulations thereunder.  Executive
agrees that restrictive legends referring to the provisions of this Section
12 shall be placed upon all certificates representing shares to which this
Section 12 applies.  The provisions of this Section 12 shall terminate upon
any Change in Control or Executive's death, whichever may first occur and
shall not apply thereafter.

      13.   Expenses and Interest.  If the Company is found by a court of
competent jurisdiction to have breached this Agreement, the Company shall
pay the costs and expenses (including reasonable attorneys fees and related
expenses) incurred by Executive in any litigation seeking damages in
respect of such breach or to enforce the performance of this Agreement by
Company, together with interest on each installment of wages or benefits
paid late by the Company calculated to the date of actual payment at an
annual rate equal to 3% over the highest rate then paid by the Company
under its short term borrowing arrangements with an independent
institutional lender (and if there is no such lender, then 4% above the
prevailing prime rate as reported in the Wall Street Journal).

      14.   Notices.  Any notice required or permitted to be given
hereunder shall be in writing and may be delivered personally or  given by
prepaid, certified, return receipt requested, first class mail addressed:

      (a)   if to the Company, to at least two members of the Board of
Directors, c/o the Company's Secretary at the address of the Company's
principal office;

      (b)   if to Executive, at his home mailing address on file with the
Company; and

      (c)   to such other address as the party to which such notice is to
be given shall have notified (in accordance with the provisions of this
Section 14) as its substitute address for the purpose of this Agreement.

      Any notice given as aforesaid shall be deemed conclusively to have
been received on the fifth business day after such mailing.

      15.   Amendment.  It is agreed that no change or modification of this
Agreement shall be made except in a writing signed by both parties.

      16.   Severability.  In the event that any one or more of the
provisions of this Agreement shall be or become invalid, illegal, or
unenforceable in any respect, the validity, legality, and enforceability of
the remaining provisions shall not be affected thereby.

      17.   Law Governing.  The validity, interpretation, and effect of
this Agreement shall be governed by the laws of the State of New York.

      18.   Entire Agreement.  This Agreement contains the entire
understanding of the parties with respect to the employment of Executive by
the Company during the Term of Employment and with respect to
non-competition, minimum consulting, and disability and retirement benefits
(but does not affect pension and other benefit plans and arrangements in
which Executive participates).  There are no restrictions, agreements,
promises, warranties, covenants, or undertakings other than those expressly
set forth herein with respect to the Term of Employment.  As of the
Commencement Date this Agreement supersedes all prior agreements,
arrangements, and understandings between the parties, whether oral or
written, with respect to employment or consulting services of Executive on
and after the Commencement Date.

      19.   [Intentionally left blank]

      20.   Change in Control.

      (a)   A "Change in Control" of the Company shall be deemed to have
      occurred if:

                  (1)   any "person," as such term is used in Sections
            13(d) and 14(d) of the Securities Exchange Act of 1934, as
            amended (the "Exchange Act") (other than the Company or any
            corporation owned, directly or indirectly, by the shareholders
            of the Company in substantially the same proportions as their
            ownership of stock of the Company), is or becomes the
            "beneficial owner" (as defined in Rule 13d-3 under the Exchange
            Act), directly or indirectly, of securities of the Company
            representing 25% or more of the combined voting power of the
            Company's then outstanding securities;

                  (2)   there is elected 35% or more of the members of the
            Board of Directors of the Company without the approval of the
            nomination of such members by a majority of the Board serving
            prior to such election;

                  (3)   the shareholders of the Company approve a merger or
            consolidation of the Company with any other corporation, other
            than (i) a merger or consolidation which would result in the
            voting securities of the Company outstanding immediately prior
            thereto continuing to represent more than 75% of the combined
            voting power of the voting securities of the Company, or such
            surviving entity, outstanding immediately after such merger or
            consolidation; or (ii) a merger or consolidation effected to
            implement a recapitalization of the Company (or similar
            transaction) in which no "person" (as defined above) acquires
            more than 25% of the combined voting power of the Company's
            then-outstanding securities; or

                  (4)   The shareholders of the Company approve an
            agreement for the sale or disposition by the Company and all or
            substantially all of the Company's assets.

      (b)   If:
(i)   any Change in Control of the Company occurs while this Agreement is
                     effective, and

(ii)  Executive gives notice to the Company or the Company (acting upon a
                     determination of its Board of Directors) gives notice
                     to Executive, in either case to the effect that the
                     six month period called for by this subsection 20(b)
                     shall begin to run (provided that Executive shall not
                     have the right to give that notice unless Karl H.
                     Kostusiak is no longer employed as the full time
                     senior executive officer of the Company at the time or
                     he either has consented in writing to the giving of
                     that notice or has given a similar such notice for
                     himself under his applicable agreement with the
                     Company), and

(iii)  Executive's employment is terminated by Executive or by the Company
                     (other than for Executive's death or disability)
                     within six months after the date the notice provided
                     for in (ii) above is received (in Executive's case the
                     termination being effected by Executive giving notice
                     within that six month period, effective within 30 days
                     after the notice is given, that his employment is
                     terminated to the extent permitted under Section 8
                     above), regardless the reason, if any, and regardless
                     which party gave the notice provided for in (ii)
                     above,

then the Company shall, upon receipt of said notice, immediately pay,
transfer, and provide to Executive the following amounts, benefits, and
assets:

                  (1)   The Company shall pay to Executive the sum of
            Executive's full non-competition compensation and salary
            through the effective date of termination of his employment at
            the rate in effect at the time of termination or at the time
            the Change in Control occurs, whichever is higher, and an
            amount equal to the amount of any bonus which has been earned
            by him but not yet paid to him.  These two amounts shall be
            paid to Executive in a lump sum within five days following the
            effective date of termination, or in the case of a bonus which
            is not readily calculable at that time, within five days after
            the bonus can be calculated.

                  (2)   The Company shall pay to Executive an amount equal
            to three times the highest total cash compensation (including
            any base salary, non-competition compensation, bonuses, and
            consulting fees) paid Executive in any of the Company's last
            three fiscal years completed prior to such termination.  This
            amount shall be paid to Executive as provided in the last
            sentence of subsection (1) above.

                  (3)   The Company shall pay to Executive an amount equal
            to the total amounts that would be expended for the benefits to
            be provided Executive under Section 3 above on the assumption
            that Executive will continue to be compensated for
            non-competition for three years after the termination.  This
            amount shall be paid to Executive as provided in the last
            sentence of subsection (1) above either in cash or in the form
            of an annuity contract issued by an independent insurance
            company licensed to do business in New York that will provide
            payment of all such total amounts.

                  (4)   All options and other rights that Executive may
            hold to purchase or otherwise acquire Common Stock of the
            Company shall immediately become exercisable in full for the
            total number of shares that are or might become purchasable
            thereunder, in each case without further condition or
            limitation  except the giving of notice of exercise and the
            payment of the purchase price thereunder (but without amendment
            of the plan under which they were issued).  At his discretion,
            Executive may elect to surrender to the Company his rights in
            any such options and rights held by him and, upon that
            surrender, the Company shall pay him an amount in cash equal to
            the aggregate spread between the exercise prices of all those
            options and rights and the value of the Common Stock
            purchasable thereunder (or of any other security into which the
            Common Stock has been exchanged or converted) as of the date of
            the termination of employment, the value to be determined by
            the reported last sale price of the Common Stock or that other
            security (or the mean between the reported last bid and asked
            prices) on that date on NASDAQ (or, if it is not NASDAQ, on
            whatever may then be the principal exchange or quotation system
            on which the Company's Common Stock or that other security is
            traded at that time).

                  (5)   The Company shall repay any policy loans previously
            taken on the Company's  life insurance policies on Executive's
            life (provided that the directors of the Company were given
            written notice promptly after the making of any such loans
            which were made while Executive was an officer of the Company),
            and then shall transfer to Executive any and all of its right,
            title, and interest in and to all Company life insurance
            policies on Executive's life (and upon that transfer, Executive
            shall be deemed to have released the Company from any and all
            obligations it then owes to him to maintain and pay premiums on
            those policies, all other provisions of any agreements under
            which those policies were agreed to be maintained, however, to
            remain in effect).

                  (6)   In addition to the amounts specified in clauses (1)
            through (5) of this paragraph (b), the Company shall pay to
            Executive, at the same time as those amounts are paid, an
            additional amount which, after taking into account all federal,
            state, and local income and excise taxes that Executive is
            required to pay with respect to receipt of the additional
            amount under this clause (6), will render the net after-tax
            payment to Executive under this clause (6) equal to the sum of:

                        (A)   all federal, state, and local excise taxes
                  that Executive is required to pay with respect to the
                  payments made pursuant to clauses (1) through (5) above;
                  and

                        (B)   all federal, state, and local income and
                  excise taxes that Executive is required to pay with
                  respect to the payment made pursuant to this clause (6).

            The foregoing amounts of federal, state, and local income and
            excise taxes shall be determined initially by a nationally
            recognized firm of independent public accountants retained by
            Executive at his expense or, at Executive's option, by
            independent public accountants at the Company's expense, and
            such determination and the basis therefor shall be furnished in
            writing to Executive and the Company.  Payment shall be made by
            the Company in accordance with that initial determination
            regardless whether there is a dispute over the accuracy
            thereof.  If either party disputes that initial determination
            the matter shall promptly be referred to a nationally
            recognized firm of independent public accountants selected by
            the Executive (which firm shall not have been involved in the
            initial determination), and Executive and the Company shall
            promptly furnish to that firm such information as it reasonably
            requests.  The Company shall make such additional payment to
            Executive or Executive shall refund to the Company, as the case
            may be, in accordance with the latter firm's determination.
            The fees and expenses of that firm shall be borne by the
            Company.

            (c)   The Company may withhold from any payments due to
Executive under paragraph (b) such amounts as its independent public
accountants may determine are required to be withheld under applicable
federal, state, and local tax laws.

            (d)   If applicable, the provisions of this Section 20 shall
control over the provisions of Section 7.  In the event that Executive's
employment is not terminated by the Company or the Executive within the six
month period specified in Section 20(b), the provisions of Section 7 once
again shall be applicable thereafter.

            (e)  In addition, if any Change in Control of the Company
occurs while this Agreement is effective, the Company shall purchase and
fully pay for an annuity policy sufficient to pay the retirement benefits
called for by Section 9 of this Agreement and shall transfer ownership
thereof to a "rabbi" trust for the benefit of Executive (but subject to the
claims of Company creditors to the extent required under applicable tax
laws so that the transfer to the trust will not itself be an event upon
which Executive recognizes income for federal or state income tax
purposes).  In lieu of purchasing the annuity policy, the Company may
deposit cash into such a trust sufficient to provide, based on assumptions
believed reasonable in the written opinion of a nationally recognized
employee benefits organization, for assuring payment of those retirement
benefits to Executive and his spouse.

            (f)   Payment of the amounts called for by this Section 20
shall not affect the Company's obligation to pay non-competition
compensation and benefits under Section 3 above or retirement benefits
under Section 9 and, if elected by Executive, Section 10 above.

      21.   Successors and Assigns.  This Agreement shall inure to the
benefit of and be binding upon the heirs, legatees, administrators,
successors, and assigns of the respective parties.

      IN WITNESS WHEREOF, Executive for himself, and the undersigned
director of the Company, acting on behalf of the Company by authority of
its Board of Directors, have executed this Agreement as of the day and year
first above written.

                                          /s/ David B. Lederer
                                          David B. Lederer, Executive


                                          DETECTION SYSTEMS, INC.

                                          By: /s/ Donald R. Adair
                                          Donald R. Adair, Chairman of the
                                          Compensation Committee of the
                                          Board of Directors



                                   Exhibit 11
                             DETECTION SYSTEMS, INC.
                        COMPUTATION OF EARNINGS PER SHARE
                      (In thousands, except per share data)


    Quarter Ended June 30,                          1999              1998
                                                    ----              ----

    Net income                                    $1,421            $  832
                                                   =====             =====
    Weighted average number of shares              6,336             6,291
                                                   =====             =====
    Basic earnings per share                       $0.22             $0.13
                                                   =====             =====
    Shares attributable to deferred
     compensation plans and stock
     options and warrants                            482               524
                                                    ====              ====
    Diluted earnings per share:                    $0.21             $0.12
                                                    ====              ====

<TABLE> <S> <C>


<ARTICLE>                     5
<MULTIPLIER>                                   1,000

<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                              MAR-31-2000
<PERIOD-START>                                 APR-01-1999
<PERIOD-END>                                   JUN-30-1999
<CASH>                                         7,510
<SECURITIES>                                   0
<RECEIVABLES>                                  23,804
<ALLOWANCES>                                   (1,023)
<INVENTORY>                                    33,669
<CURRENT-ASSETS>                               67,253
<PP&E>                                         33,229
<DEPRECIATION>                                 (20,679)
<TOTAL-ASSETS>                                 94,208
<CURRENT-LIABILITIES>                          17,998
<BONDS>                                        0
                          0
                                    0
<COMMON>                                       329
<OTHER-SE>                                     56,771
<TOTAL-LIABILITY-AND-EQUITY>                   94,208
<SALES>                                        34,766
<TOTAL-REVENUES>                               34,766
<CGS>                                          20,964
<TOTAL-COSTS>                                  32,316
<OTHER-EXPENSES>                               180
<LOSS-PROVISION>                               0
<INTEREST-EXPENSE>                             238
<INCOME-PRETAX>                                2,270
<INCOME-TAX>                                   849
<INCOME-CONTINUING>                            1,421
<DISCONTINUED>                                 0
<EXTRAORDINARY>                                0
<CHANGES>                                      0
<NET-INCOME>                                   1,421
<EPS-BASIC>                                  0.22
<EPS-DILUTED>                                  0.21





</TABLE>


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