EXHIBIT (10)k


                    TRUST UNDER HACH COMPANY

                   DEFERRED COMPENSATION PLAN



(a)  This  Agreement made this 10th day of April by
     and  between Hach Company (Company) and Dauphin Deposit Bank
     and Trust Company (Trustee);

(b)  WHEREAS,  Company has adopted a nonqualified plan, the  Hach
     Company Deferred Compensation Plan (Plan);

(c)  WHEREAS,  Company has incurred or expects to incur liability
     under the terms of such Plan with respect to the individuals
     participating in such Plan;

(d)  WHEREAS,  Company  wishes to establish a trust  (hereinafter
     called  "Trust") and to contribute to the Trust assets  that
     shall  be  held therein, subject to the claims of  Company's
     Insolvency,   as  herein  defined,  until   paid   to   Plan
     participants and their beneficiaries in such manner  and  at
     such times as specified in the Plan;

(e)  WHEREAS, it is the intention of the parties that this  Trust
     shall  constitute  an  unfunded arrangement  and  shall  not
     affect the status of the Plan as an unfunded plan maintained
     for  the  purpose of providing deferred compensation  for  a
     select  group of management or highly compensated  employees
     for  purposes  of Title I of the Employee Retirement  Income
     Security Act of 1974;

(f)  WHEREAS,   it   is   the  intention  of  Company   to   make
     contributions to the Trust to provide itself with  a  source
     of  funds  to  assist it in the meeting of  its  liabilities
     under the Plan.

NOW,  THEREFORE, the parties do hereby establish  the  Trust  and
agree that the Trust shall be comprised, held and disposed of  as
follows:


SECTION 1.

ESTABLISHMENT OF TRUST.

(a)  Company  hereby deposits with Trustee in trust $1.00,  which
     shall become the principal of the Trust to be held,

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     administered and disposed of by Trustee as provided in  this
     Trust Agreement.

(b)  The  Trust  shall  become irrevocable upon approval  by  the
     Board of Directors.

(c)  The  Trust  is  intended  to be a grantor  trust,  of  which
     Company  is  the grantor, within the meaning of  subpart  E,
     part  I, subchapter J, chapter 1, subtitle A of the Internal
     Revenue  Code  of 1986, as amended, and shall  be  construed
     accordingly.

(d)  The  principal of the Trust, and any earnings thereon  shall
     be  held separate and apart from other funds of Company  and
     shall be used exclusively for the uses and purposes of  Plan
     participants  and  general creditors as  herein  set  forth.
     Plan  participants  and their beneficiaries  shall  have  no
     preferred  claim  on, or any beneficiary ownership  interest
     in,  any assets of the Trust.  Any rights created under  the
     Plan  and  this  Trust  Agreement shall  be  mere  unsecured
     contractual   rights   of   Plan  participants   and   their
     beneficiaries against Company.  Any assets held by the Trust
     will be subject to the claims of Company's general creditors
     under  federal and state law in the event of Insolvency,  as
     defined in Section 3(a) herein.

(e)  Company,  in its sole discretion, may at any time,  or  from
     time  to  time,  make additional deposits of cash  or  other
     property  in trust with Trustee to augment the principal  to
     be held, administered and disposed of by Trustee as provided
     in  this  Trust  Agreement.  Neither Trustee  nor  any  Plan
     participant  or beneficiary shall have any right  to  compel
     such additional deposits.


SECTION 2.

PAYMENTS TO PLAN PARTICIPANTS AND THEIR BENEFICIARIES.

(a)  Company  shall  deliver to Trustee a schedule (the  "Payment
     Schedule") that indicates the amounts payable in respect  of
     each  Plan participant (and his or her beneficiaries),  that
     provides  a  formula  or  other instructions  acceptable  to
     Trustee for determining the amounts so payable, the form  in
     which  such  amount  is  to  be paid  (as  provided  for  or
     available under the Plan), and the time of commencement  for
     payment  of  such  amounts.  Except  as  otherwise  provided
     herein, Trustee shall make payments to the Plan participants
     and  their  beneficiaries in accordance  with  such  Payment
     Schedule.  The Trustee shall

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     make  provision  for  the reporting and withholding  of  any
     federal  taxes  that  may be required to  be  withheld  with
     respect to the payment of benefits pursuant to the terms  of
     the  Plan  and shall pay amounts withheld to the appropriate
     taxing authorities or determine that such amounts have  been
     reported,   withheld  and  paid  by   Company.    The   Plan
     participants or their beneficiaries, if applicable, shall be
     responsible  for the reporting and payment of any  state  or
     local  taxes  that  may  be due to  the  appropriate  taxing
     authorities with respect to the payment of benefits pursuant
     to the terms of the Plan.

(b)  The  entitlement  of  a  Plan  participant  or  his  or  her
     beneficiaries to benefits under the Plan shall be determined
     by  Company  or such party as it shall designate  under  the
     Plan,  and  any claim for such benefits shall be  considered
     and reviewed under the procedures set out in the Plan.

(c)  Company  may  make  payment  of benefits  directly  to  Plan
     participants or their beneficiaries as they become due under
     the  terms of the Plan.  Company shall notify Trustee of its
     decision to make payments of benefits directly prior to  the
     time   amounts   are  payable  to  participants   or   their
     beneficiaries.  In addition, if the principal of the  Trust,
     and  any  earnings  thereon,  are  not  sufficient  to  make
     payments  of  benefits in accordance with the terms  of  the
     Plan, Company shall make the balance of each such payment as
     it  falls due.  Trustee shall notify Company where principal
     and earnings are not sufficient.


SECTION 3.

TRUSTEE  RESPONSIBILITY REGARDING PAYMENTS TO  TRUST  BENEFICIARY
WHEN COMPANY IS INSOLVENT.

(a)  Trustee shall cease payment of benefits to Plan participants
     and   their  beneficiaries  if  the  Company  is  Insolvent.
     Company shall be considered "Insolvent" for purposes of this
     Trust Agreement if

          (i)   Company is unable to pay its debts as they become
                due, or

          (ii)  Company is subject to a pending proceeding  as  a
                debtor under the United States Bankruptcy Code.

(b)  At  all  times  during the continuance  of  this  Trust,  as
     provided in Section 1(d) hereof, the principal and income of
     the Trust shall be subject to claims of general creditors of
     Company under federal and state law as set forth below:

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          (i)   The  Board of Directors and  the  Chief Executive
                Officer  of Company shall have the duty to inform
                Trustee in writing of Company's  Insolvency. If a
                person   claiming   to  be a creditor of  Company
                alleges in  writing to  Trustee that Company  has
                become   Insolvent,   Trustee   shall   determine
                whether Company is Insolvent  and,  pending  such
                determination, Trustee shall discontinue  payment
                of  benefits   to    Plan  participants or  their
                beneficiaries.

          (ii)  Unless Trustee has actual knowledge of  Company's
                Insolvency, or has  received  notice from Company
                or  a  person  claiming to be a creditor alleging
                that  Company is Insolvent,  Trustee  shall  have
                no duty to inquire whether Company is  Insolvent.
                Trustee may in all events rely  on  such evidence
                concerning Company's solvency as may be furnished
                to   Trustee  and  that  provides Trustee  with a
                reasonable   basis  for  making  a  determination
                concerning Company's solvency.

          (iii) If  at  any  time  Trustee  has  determined  that
                Company is Insolvent, Trustee  shall  discontinue
                payments   to    Plan   participants  or    their
                beneficiaries  and  shall hold  the assets of the
                Trust  for  the   benefit  of  Company's  general
                creditors.  Nothing  in    this  Trust  Agreement
                shall in any way diminish  any   rights  of  such
                general creditors with  respect  to  benefits due
                under the Plan or otherwise.

          (iv)  Trustee  shall  resume  the  payment  of benefits
                to Plan participants or their  beneficiaries   in
                accordance with Section 2 of this Trust Agreement
                only after Trustee has determined that Company is
               not Insolvent (or is no longer Insolvent).

(c)  Provided  that  there  are  sufficient  assets,  if  Trustee
     discontinues the payment of benefits from the Trust pursuant
     to   Section  3(b)  hereof  and  subsequently  resumes  such
     payments,  the  first payment following such  discontinuance
     shall  include the aggregate amount of all payments  due  to
     Plan participants or their beneficiaries under the terms  of
     the  Plan  for the period of such discontinuance,  less  the
     aggregate  amount of any payments made to Plan  participants
     or  their  beneficiaries by Company in lieu of the  payments
     provided   for   hereunder  during  any   such   period   of
     discontinuance.

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SECTION 4.

PAYMENTS TO COMPANY.

Except  as  provided  in Section 3 hereof, after  the  Trust  has
become  irrevocable,  Company shall have no  right  or  power  to
direct Trustee to return to Company or to divert to others any of
the Trust assets before all payment of benefits have been made to
Plan  participants and their beneficiaries pursuant to the  terms
of the Plan.


SECTION 5.

INVESTMENT AUTHORITY.

(a)  The Trustees shall invest the principal of the Trust and any
     earnings thereon in accordance with written directions  from
     Company.   Such  directions shall provide Trustee  with  the
     investment discretion to invest the above-referenced amounts
     within  broad guidelines established by Trustee and  Company
     and set forth therein.

(b)  Subject to Subsection (a), the Trustee may

          (i)   invest  and  reinvest the  amounts  described  in
                Subsection  (a)  in  any  form  of  property  not
                prohibited by  law, including, without limitation
                on  the  amount  which  may  be invested therein,
                any    mutual    funds,   money   market   funds,
                certificates of deposit, life insurance policies,
                annuity  contracts,  and  other deposits yielding
                a reasonable rate of interest; and

          (ii)  hold  cash  uninvested in  an  amount  considered
                necessary and prudent for  proper  administration
                of  the  Trust,  or  deposit  the  same  with any
                banking, savings or similar financial institution
                supervised by the  United States  or  any  state,
                including the  Trustee's own  banking department.

(c)  Notwithstanding  the  foregoing, in  no  event  may  Trustee
     invest  in securities (including stock or rights to  acquire
     stock)  or  obligations issued by Company, other than  a  de
     minimis  amount held in common investment vehicles in  which
     Trustee invests.  All rights associated with assets  of  the
     Trust shall be exercised by Trustee or the person designated
     by  Trustee, and shall in no event be exercisable by or rest
     with Plan participants.

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     Subject   to  the  limitation  described  in  the  preceding
     paragraph,  Company shall have the right,  at  anytime,  and
     from  time  to  time in its sole discretion,  to  substitute
     assets of equal fair market value for any asset held by  the
     Trust, provided such substitute assets are acceptable to the
     Trustee.


SECTION 6.

DISPOSITION OF INCOME.

During  the term of this Trust, all income received by the Trust,
net of expenses and taxes, shall be accumulated and reinvested.


SECTION 7.

ACCOUNTING BY TRUSTEE.

Trustee  shall  keep  accurate  and  detailed  records   of   all
investments,  receipts, disbursements, and all other transactions
required to be made, including such specific records as shall  be
agreed  upon in writing between Company and Trustee.   Within  90
days following the close of each calendar year and within 90 days
after  the  removal  or  resignation of  Trustee,  Trustee  shall
deliver to Company a written account of its administration of the
Trust during such year or during the period from the close of the
last  preceding year to the date of such removal or  resignation,
setting forth all investments, receipts, disbursements and  other
transactions  effected  by it, including  a  description  of  all
securities  and investments purchased and sold with the  cost  or
net proceeds of such purchases or sales (accrued interest paid or
receivable  being  shown  separately),  and  showing  all   cash,
securities  and other property held in the Trust at  the  end  of
such  year  or as of the date of such removal or resignation,  as
the case may be.


SECTION 8.

RESPONSIBILITY OF TRUSTEE.

(a)  Trustee  shall  act  with  the  care,  skill,  prudence  and
     diligence  under  the circumstances then prevailing  that  a
     prudent  person  acting in like capacity and  familiar  with
     such matters would use in the conduct of an enterprise of  a
     like  character and with like aims, provided, however,  that
     Trustee  shall  incur no liability to  any  person  for  any
     action  taken pursuant to a direction, request  or  approval
     given by Company which is contemplated by, and in conformity
     with,  the terms of the Plan or this Trust and is  given  in
     writing  by  Company.   In the

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     event of a  dispute between Company and a party, Trustee may
     apply  to  a court of competent jurisdiction to resolve  the
     dispute.

(b)  If  Trustee undertakes or defends any litigation arising  in
     connection  with  this Trust, Company  agrees  to  indemnify
     Trustee  against  Trustee's cost, expenses  and  liabilities
     (including,   without   limitation,  attorneys'   fees   and
     expenses)  relating thereto and to be primarily  liable  for
     such payments.  If Company does not pay such costs, expenses
     and  liabilities in a reasonably timely manner, Trustee  may
     obtain payment from the Trust.

(c)  Trustee  may  consult with legal counsel (who  may  also  be
     counsel  for Company generally) with respect to any  of  its
     duties or obligations hereunder.

(d)  Trustee  may hire agents, accountants, actuaries, investment
     advisors,  financial consultants or other  professionals  to
     assist  it  in  performing any of its duties or  obligations
     hereunder.

(e)  Trustee  shall have, without exclusion, all powers conferred
     on  Trustees  by  applicable law, unless expressly  provided
     otherwise  herein, provided, however, that if  an  insurance
     policy is held as an asset of the Trust, Trustee shall  have
     no  power to name a beneficiary of the policy other than the
     Trust, to assign the policy (as distinct from conversion  of
     the  policy  to a different form) other than to a  successor
     Trustee,  or  to  loan  to any person the  proceeds  of  any
     borrowing against such policy.

(f)  However,  notwithstanding  the provisions  of  Section  8(e)
     above,  Trustee  may  loan to Company the  proceeds  of  any
     borrowing  against an insurance policy held as an  asset  of
     the Trust.

(g)  Notwithstanding  any powers granted to Trustee  pursuant  to
     this Trust Agreement or to applicable law, Trustee shall not
     have  any power that could give this Trust the objective  of
     carrying  on  a  business and dividing the gains  therefrom,
     within  the  meaning of section 301.7701-2 of the  Procedure
     and  Administrative Regulations promulgated pursuant to  the
     Internal Revenue Code.

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SECTION 9.

COMPENSATION AND EXPENSES OF TRUSTEE.

Company  shall  pay  all administrative and  Trustee's  fees  and
expenses.   If not so paid, the fees and expenses shall  be  paid
from the Trust.


SECTION 10.

RESIGNATION AND REMOVAL OF TRUSTEE.

(a)  Trustee may resign at any time by written notice to Company,
     which  shall  be  effective 90 days after  receipt  of  such
     notice unless Company and Trustee agree otherwise.

(b)  Trustee may be removed by Company on 90 days notice or  upon
     shorter notice accepted by Trustee.

(c)  Upon a Change of Control, as defined herein, Trustee may not
     be removed by Company for one year.

(d)  If  Trustee  resigns  within one  year  after  a  Change  of
     Control, as defined herein, Company shall apply to  a  court
     of  competent jurisdiction for the appointment of  successor
     Trustee or for instructions.

(e)  Upon resignation or removal of Trustee and appointment of  a
     successor   Trustee,  all  assets  shall   subsequently   be
     transferred to the successor Trustee.  The transfer shall be
     completed  within  90  days  after  receipt  of  notice   of
     resignation, removal or transfer, unless Company extends the
     time limit.

(g)  If  Trustee  resigns  or is removed, a  successor  shall  be
     appointed,  in  accordance with section 11  hereof,  by  the
     effective  date  of resignation or removal under  paragraphs
     (a) or (b) of this section.  If no such appointment has been
     made, Trustee may apply to a court of competent jurisdiction
     for  appointment  of a successor or for  instructions.   All
     expenses of Trustee in connection with the proceeding  shall
     be allowed as administrative expenses of the Trust.

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SECTION 11.

APPOINTMENT OF SUCCESSOR.

(a)  If  Trustee resigns or is removed in accordance with Section
     10(a)  or  (b) hereof, Company may appoint any third  party,
     such  as a bank trust department or other party that may  be
     granted  corporate  trustee powers under  state  law,  as  a
     successor  to replace Trustee upon resignation  or  removal.
     The  appointment shall be effective when accepted in writing
     by  the  new  Trustee, who shall have all of the rights  and
     powers of the former Trustee, including ownership rights  in
     the  Trust  assets.   The former Trustee shall  execute  any
     instrument  necessary or reasonably requested by Company  or
     the successor Trustee to evidence the transfer.

(b)  The  successor Trustee need not examine the records and acts
     of  any  prior Trustee and may retain or dispose of existing
     Trust  assets,  subject to Sections 7  and  8  hereof.   The
     successor  Trustee shall not be responsible for and  Company
     shall  indemnify and defend the successor Trustee  from  any
     claim or liability resulting from any action or inaction  of
     any  prior  Trustee  or from any other past  event,  or  any
     condition existing at the time it becomes successor Trustee.


SECTION 12.

AMENDMENT OR TERMINATION.

(a)  This  Trust Agreement may be amended by a written instrument
     executed by Trustee and Company.

     Notwithstanding  the  foregoing,  no  such  amendment  shall
     conflict with the terms of the Plan or shall make the  Trust
     revocable after it has become irrevocable in accordance with
     Section 1(b) hereof.

(b)  The  Trust shall not terminate until the date on which  Plan
     participants and their beneficiaries are no longer  entitled
     to  benefits  pursuant  to  the terms  of  the  Plan.   Upon
     termination of the Trust any assets remaining in  the  Trust
     shall be returned to Company.

(c)  Upon  written  approval  of  participants  or  beneficiaries
     entitled to payment of benefits pursuant to the terms of the
     Plan.   Company may terminate this Trust prior to  the  time
     all  benefit  payments under the Plan have been  made.   All
     assets  in  the  Trust at termination shall be  returned  to
     Company.

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(d)  This  Trust Agreement may not be amended by Company for  one
     year following a Change of Control, as defined herein.

SECTION 13.

MISCELLANEOUS.

(a)  Any  provision  of  this Trust Agreement prohibited  by  law
     shall  be ineffective to the extent of any such prohibition,
     without invalidating the remaining provisions hereof.

(b)  Benefits   payable   to   Plan   participants   and    their
     beneficiaries  under  this  Trust  Agreement  may   not   be
     anticipated,  assigned  (either  at  law  or   in   equity),
     alienated,  pledged, encumbered or subjected to  attachment,
     garnishment,  levy,  execution or other legal  or  equitable
     process.

(c)  This  Trust Agreement shall be governed by and construed  in
     accordance   with   the   laws  of   the   Commonwealth   of
     Pennsylvania.

(d)  For purposes of this Trust, "Change of Control" shall mean a
     change in control of a nature that would be required  to  be
     reported  in  response  to  Item 6(e)  of  Schedule  14A  of
     Regulation 14A promulgated under the Securities Act of 1934.

SECTION 14.

EFFECTIVE DATE.

The   effective   date   of  this  Trust   Agreement   shall   be
March 1, 1995.

IN  WITNESS  WHEREOF,  Company and  Trustee  have  executed  this
Agreement as of the date first above written.

                                HACH COMPANY

                                By: /s/ Bruce J. Hach
                                    ______________________________
                                        President

ATTEST:

/s/ Mary A. McCray
_______________________________
    Asst. Secretary

                                DAUPHIN DEPOSIT BANK
                                AND TRUST COMPANY

                                By: /s/ Robin Lake Becker
                                    ______________________________
                                        Asst. Vice President

ATTEST:

/s/ Bernard Kelly, Jr.
_______________________________
    Assistant Secretary