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                                                                EXHIBIT 10.1

                              EMPLOYMENT AGREEMENT
                              --------------------

                THIS EMPLOYMENT AGREEMENT ("Agreement") is made and entered into
by HYCOR BIOMEDICAL INC., a Delaware corporation ("Company"), and RICHARD D.
HAMILL ("Hamill").

               WHEREAS, the Company desires to employ Hamill in an executive
capacity, Hamill desires to accept such employment, and the parties desire to
memorialize the terms and conditions of their employment relationship,

               NOW, THEREFORE, in consideration of the promises and covenants
set forth in this Agreement and for other valuable consideration, the parties
agree as follows:

                  1. Employment: Hamill shall be employed as the President and
Chief Executive Officer of the Company, and shall faithfully and diligently
perform all duties and responsibilities required of such position or assigned by
the Board of Directors from time to time, including service on behalf of the
Company's subsidiary and affiliated companies and as a member of the Board of
Directors.

                  2. Term. This Agreement and Hamill's employment shall be for a
term of three (3) years commencing on June 20, 1997 and expiring on June 19,
2000, but shall be automatically renewed for successive one-year periods
thereafter unless either party gives written notice to the other party of
nonrenewal at least six (6) months in advance of the expiration date.

                  3. Compensation: In consideration for all services to be
performed under this Agreement, Hamill shall receive the following compensation:

                           A. Salary: Hamill shall be paid base salary at the
        rate of Two Hundred Fifty Thousand Dollars ($250,000) per year.
        Annually, the Board of Directors shall review Hamill's performance with
        a view toward increasing his salary.

                           B. Bonus: Hamill shall be entitled to participate in
        the Company's Annual Executive Incentive Plan and the Long Term
        Executive Incentive Plan, subject to all of the terms and conditions set
        forth in said plans, as amended from time to time, as long as such plans
        remain in effect, and to participate in any successor or similar
        incentive plan available to management personnel of comparable status
        with the Company or its affiliates. Nothing herein or in said plans
        shall constitute a guarantee of Hamill's employment by the Company, or a
        limitation on the Company's rights under this Agreement, or limitation
        on the Company's rights to amend or terminate any plan.

                           C. Employee Benefit Plans: Hamill shall be
        entitled to participate in all employee benefit plans, including group
        medical, dental, visual, and life insurance, pension, profit sharing,
        group and individual disability income, stock option, vacation, and
        other benefit plans, on terms commensurate with the benefits awarded
        management personnel of comparable status with the Company or any
        affiliate of the Company, but subject, on any termination, to Section
        4.E below.


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                           D. Expense Reimbursement: The Company shall reimburse
        Hamill for all reasonable expenses that he necessarily incurs in
        connection with his employment and for which he presents adequate
        documentation in accordance with Company policies in effect from time to
        time.

                           E. Life Insurance: In addition to any other insurance
        benefit, the Company shall maintain a term life insurance policy on
        Hamill's life in the amount of $700,000, with Hamill having the right to
        designate the beneficiary of such insurance.

                           F. Disability Supplement: In the event Hamill is
        disabled from performing his assigned duties for any period in excess of
        thirty (30) days, then in addition to all disability benefits provided
        by any other insurance policy or plan and without diminishing the amount
        of such benefits, the Company shall pay Hamill for up to twelve (12)
        months during the period in which he is disabled an additional amount
        equal to the difference between his base salary and other disability
        benefits Hamill is eligible to receive.

                           G. Automobile: The Company shall provide Hamill with
        a new full-sized automobile, together with all related maintenance and
        operating expenses, such automobile to be replaced with a new like-kind
        automobile every two years.

                  4. Termination: This Agreement and Hamill's employment are
subject to immediate termination at any time as follows:

                           A. Death: This Agreement shall terminate immediately
        upon Hamill's death, in which event the Company's only obligations shall
        be (i) to pay all compensation owing for services rendered by Hamill
        prior to the date of his death; (ii) to continue paying Hamill's base
        salary to his estate for a period of thirty (30) days after his death;
        and (iii) to make periodic recoverable advances to Hamill's estate
        equivalent to Hamill's base salary for ninety (90) days after said
        thirty (30) day period has lapsed, or until the proceeds from the life
        insurance policy on Hamill's life referred to in this Agreement become
        available, whichever occurs first, with such advances to be repaid when
        said insurance proceeds become available.

                           B. Disability: In the event that Hamill is disabled
        from performing his assigned duties under this Agreement due to illness
        or injury for a period in excess of one hundred eighty (180) days, the
        Company may place Hamill on an unpaid leave of absence for a period not
        to exceed six (6) months, in which case the Company's only obligation
        shall be (i) to continue Hamill's group medical and life insurance for
        the duration of the leave; (ii) to pay the bonus, if any, that Hamill
        would be entitled to under the terms of the bonus plans referred to in
        Section 3B of this Agreement; (iii) to allow Hamill to continue
        receiving benefits under the disability insurance and other employee
        benefit plans in effect at the time of his disability in accordance with
        the terms and conditions of such plans; and (iv) to pay a disability
        supplement in accordance with Section 3F of this Agreement. The granting
        of a leave of absence does not guarantee that Hamill will be returned to
        employment, and the 


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        Company reserves the right to replace Hamill or to take other action in
        his absence due to business necessity. If Hamill is certified to return
        to work before his leave of absence expires, and desires to do so, the
        following provisions shall apply: (i) the Company will attempt to return
        Hamill to his same or similar position, provided this does not result in
        undue hardship to the Company; and (ii) if the Company is unable to
        reinstate Hamill because his position has been filled, then as a special
        severance benefit, the Company shall pay a lump-sum severance payment
        equal to twenty (20) months of Hamill's base salary as in effect
        immediately prior to the commencement of Hamill's leave of absence. If
        Hamill is not certified to return to work before his leave of absence
        expires, or does not desire to return, his employment and this Agreement
        shall terminate upon the expiration of his leave of absence.

                           C. Termination For Cause: The Company may terminate
        this Agreement for cause immediately upon written notice to Hamill in
        the event Hamill (i) engages in any material misconduct, willful breach,
        or habitual neglect of his duties as an officer or director of the
        Company, or (ii) is finally convicted of a felony. In either event, the
        Company's sole obligation to Hamill in lieu of all claims for
        compensation or damages shall be to pay all compensation owing for
        services rendered by Hamill prior to the date of termination under this
        subsection.

                           D. Termination Without Cause: The Company in its sole
        discretion may terminate this Agreement without cause or prior warning
        immediately upon written notice to Hamill. For purposes of this Section
        4D, any failure to renew this Agreement and any resignation following a
        substantial reduction in Hamill's salary, duties or responsibilities
        shall constitute an involuntary termination without cause for the
        convenience of the Company. In the event of a termination under this
        Section 4D the Company shall pay all compensation owing for services
        rendered by Hamill prior to the date of termination, shall pay a
        lump-sum severance benefit equal to twenty (20) months of Hamill's base
        salary at the time of termination, and shall continue to provide Hamill
        at Company expense all medical, disability and insurance benefits
        available to him at the time of termination for a period of twenty (20)
        months after the termination or, if shorter, the maximum period allowed
        under the Company's policies as then in effect or under applicable law.
        As an additional severance payment, if the Company has in effect at the
        time of any termination without cause under this Section 4D any bonus or
        incentive plan which provides for awards in cash and is based on the
        Company's revenues or results of operations for a fiscal year or other
        period, Hamill shall be entitled to an amount equal to a pro rata award
        based on the portion of the fiscal year or other period for which he was
        employed. Such severance shall be payable at the same time, and computed
        on the same terms, as awards under the plan in question, except for
        periods of service. In addition, any termination under this Section 4D
        shall constitute a termination for the convenience of the Company and
        shall extend the post-termination exercise period for all stock options
        granted to Hamill under the Company's stock option and other benefit
        plans so that such options will be exercisable for the longer of three
        months following the date of termination or any longer period provided
        in such plan. Such payments and benefits shall not entitle Hamill to any
        other benefits or compensation program available to Company employees.


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                       E. Termination Following Change In Control: If either the
        Company elects to terminate Hamill without cause pursuant to Section
        4(D) within ninety (90) days before or twenty four (24) months after a
        change in control or Hamill elects to resign with good reason within
        twenty four (24) months after a change in control of the Company, then
        as a severance benefit and in lieu of all compensation or damages the
        Company shall (i) pay Hamill a lump sum equal to 299% of the average of
        the annual base salary plus bonuses paid to Hamill during each of the
        three years prior to the time of such termination or resignation, (ii)
        continue to provide Hamill at Company expense all medical, disability
        and insurance benefits available to him at the time of such termination
        or resignation for a period of twenty four (24) months after such
        termination or resignation, or, if shorter, the maximum period allowed
        under the Company's policies as then in effect or under applicable law,
        (iii) accelerate the vesting of all unvested stock options granted to
        Hamill under the Company's stock option or other benefit plans so that
        all such stock options will vest and be fully exercisable on the date of
        such termination or resignation, and (iv) extend the post-termination
        exercise period for all stock options granted to Hamill under the
        Company's stock option and other benefit plans so that all such stock
        options will be exercisable for the longer of three months after the
        date of such termination or resignation or any longer post-termination
        exercise period provided in such plan.

                       For purposes of this subsection, the term "change in
        control" shall mean any change in control that the Company would be
        required to report in response to Item 5(f) of Schedule 14A of
        Regulation 14A promulgated under the Securities Exchange Act of 1934, as
        amended (the "Exchange Act"). Without limiting the foregoing, a change
        in control shall also be deemed to have occurred if (i) any "person" as
        defined in Section 13(d) and 14(d) of the Exchange Act is or becomes,
        directly or indirectly, the "beneficial owner" as defined in Rule 13
        (d-3) under the Exchange Act of securities of the Company which
        represent 25% or more of the combined voting power of the Company's then
        outstanding securities; or (ii) during any period of two consecutive
        years, individuals who at the beginning of said two year period
        constituted the Board of Directors of the Company cease for any reason
        to constitute at least a majority of the Board unless the election or
        nomination of each new director was approved by a vote of at least
        two-thirds of the directors who were in office at the beginning of said
        two year period.

                       For purposes of this subsection, Hamill shall be deemed
        to have resigned "with good reason" if he does so following a change in
        control as a result of the Company having done any or all of the
        following without Hamill's express written consent: (i) assigned Hamill
        different duties or made changes in his reporting responsibilities,
        title, or office that are substantially inconsistent with Hamill's
        duties, responsibilities, titles, or offices immediately prior to the
        change in control; (ii) reduced Hamill's base salary from that in effect
        at the time of the change in control; (iii) failed to continue any bonus
        plan in substantially the same form as it existed prior to the change in
        control; (iv) required Hamill to be based more than fifty (50) miles
        from his present office location, except for required travel consistent
        with Hamill's present business travel obligations; (v) failed to
        continue any plan or program for compensation, employee benefits, stock
        purchase or ownership, life insurance, group medical, disability, or
        vacation in substantially the same form as immediately prior to the


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        change in control, or otherwise made any material reduction in Hamill's
        fringe benefits, or (vi) failed to obtain the assumption of this
        Agreement by any successor to the Company.

                           Hamill shall not be entitled to the benefits of this
        Section 4(E) if this Agreement and his employment are terminated
        pursuant to Section 4(A), (B) or (C). If Hamill institutes legal
        proceedings to enforce any provision of this Section 4E or any other
        provision of this Agreement providing rights or benefits after a change
        of control, he shall be entitled to recover from the Company all costs,
        fees and expenses of such proceeding if he is the prevailing party.

                           F. Company's Obligations Under This Agreement
        Exclusive: The benefits set forth in subsections A through E above
        (which benefits, in the event of termination pursuant to subsections A,
        C, D or E, include payment for services rendered prior to termination as
        provided in such subsection), as applicable, constitute the sole
        obligations of the Company to Hamill upon a termination and are in lieu
        of any damages or other compensation that Hamill may claim under other
        Company policies in connection with this Agreement. The benefits on
        termination in this Agreement are in substitution for any severance or
        termination benefits otherwise available under Company policies of
        general application. Hamill expressly acknowledges that certain Company
        benefit or incentive plans provide for vesting in, or award of, benefits
        based on employment on or through particular dates and that nothing in
        this Agreement entitles him to partial vesting or partial awards under
        such plans. Any payments under Section 4D relating to any incentive or
        bonus plan are expressly acknowledged to be benefits under this
        Agreement and not an interpretation or modification of any such plan.

                           G. Resignation As Officer and Director: In the event
        of any termination pursuant to this Section 4, Hamill shall be deemed to
        have resigned as an officer and director of the Company if he was
        serving in such capacity at the time of termination.

                  5. Confidentiality: Hamill acknowledges and agrees that he has
been and will continue to be entrusted with trade and proprietary information
regarding the products, processes, methods of manufacture and delivery,
know-how, designs, formula, work in progress, research and development, computer
software and data bases, copyrights, trademarks, patents, marketing techniques,
and future business plans, as well as customer lists and information concerning
the identity, needs, and desires of actual and potential customers of the
Company and its subsidiaries, joint venturers, partners, and other affiliated
persons and entities ("Confidential Information"), all of which derive
significant economic value from not being generally known to others outside the
Company.

                           A. During the entire term of his employment with the
        Company and for two years thereafter, Hamill shall not disclose or
        exploit any Confidential Information except for the sole benefit of the
        Company or with its express written consent.

                           B. During the entire term of his employment by the
        Company and for one year thereafter, Hamill shall not directly or
        indirectly solicit 



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        any actual or potential customer of the Company or its subsidiary and
        affiliated companies for any business that competes directly or
        indirectly with the Company, except for the sole benefit of the Company
        or with its express written consent.

                           C. During the entire term of his employment by the
        Company and for one year thereafter, Hamill shall not induce or attempt
        to induce any employee of the Company to leave the Company's employ
        except for the sole benefit of the Company or with its express written
        consent.

                           D. In the event any provision in this Section 5 is
        more restrictive than allowed by the law of any jurisdiction in which
        the Company seeks enforcement, such provision shall be deemed amended
        and shall then be fully enforceable to the extent permitted by such law.

                           E. Hamill acknowledges and agrees that any violation
        of this Section 5 would cause immediate irreparable damage to the
        Company, and that it would be extremely difficult or impossible to
        determine the amount of damage caused to the Company. Hamill therefore
        agrees that the Company's remedies at law are inadequate, and hereby
        consents to issuance of a temporary restraining order, preliminary and
        permanent injunction, and other appropriate relief to restrain any
        actual or threatened violation of this Section, without limiting any
        remedies the Company may have at law or in equity.

                  6. Inventions: Any and all patents, copyrights, trademarks,
inventions, discoveries, developments, or trade secrets developed or perfected
by Hamill during or as the result of his employment with the Company shall
constitute the sole and exclusive property of the Company. Hamill shall disclose
all such matters to the Company, assign all right, title and interest he may
have in them, and cooperate with the Company in obtaining and perfecting any
patent, copyright, trademark, or other legal protection. This Section 6 shall
not apply to any invention which qualifies fully under California Labor Code
Section 2870, a true copy of which is attached to this Agreement as Exhibit A.

                  7. Conflict Of Interest: During the term of this Agreement,
Hamill shall devote his time, ability, and attention to the business of the
Company, and shall not accept other employment or engage in any other outside
business activity which interferes with the performance of his duties and
responsibilities under this Agreement or which involves actual or potential
competition with the business of the Company, except with the express written
consent of the Board of Directors.

                  8. Employee Benefit Plans: All of the employee benefit plans
referred to or contemplated by this Agreement shall be governed solely by the
terms of the underlying plan documents and by applicable law. Nothing in this
Agreement shall impair the Company's right to amend, modify, replace and
terminate any and all such plans in its sole discretion as provided by law, or
to terminate this Agreement in accordance with its terms. This Agreement is for
the sole benefit of Hamill and the Company, and is not intended to create an
employee benefit plan or to modify the term of existing plans.


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                  9.   Parachute Limitation:
                       ---------------------

                       A. If the payments and benefits Hamill is entitled to
under this Agreement and all other contracts, arrangements, or programs upon a
change in control shall, in the aggregate, exceed the maximum amount that may be
paid to Hamill without triggering golden parachute penalties under Section 280G
and related provisions of the Internal Revenue Code, as determined in good faith
by the Company's independent auditors (the "280G Ceiling"), then the cash
amounts paid to Hamill shall be increased to the extent necessary to compensate
Hamill for all excise taxes resulting from exceeding the 280G Ceiling, and all
income and other taxes due on such increased amounts, until Hamill has received
all amounts he would have received if no excise taxes were due under the 280G
Ceiling.

                       B. Although the Company does not believe it possible
under the terms of this Agreement, if the payments and benefits Hamill would be
entitled to receive upon a termination would exceed the 280G Ceiling and there
has been no change in control, Hamill's benefits shall be cut back in the
priority order designated by Hamill or, if Hamill fails promptly to designate an
order, in the priority order designated by the Company, to an amount $1 less
than the 280G Ceiling. If an amount in excess of the limit set forth in this
Section is paid to Hamill and there has been no change in control, Hamill must
repay the excess amount to the Company upon demand. Hamill and the Company agree
reasonably to cooperate with each other in connection with any administrative or
judicial proceedings concerning the existence or amount of golden parachute
penalties with respect to payments or benefits Hamill receives.

                  10. Assignment: This Agreement may not be assigned by Hamill,
but may be assigned by the Company to any successor in interest to its business.
In the event the Company does not survive any merger, acquisition, or other
reorganization, it shall make a reasonable effort to obtain an assumption of
this Agreement by the surviving entity in such merger, acquisition, or other
reorganization, but the failure to obtain such assumption shall not prevent or
delay such merger, acquisition, or other reorganization or relieve the Company
of its other obligations under this Agreement. This Agreement shall bind and
inure to the benefit of the Company's successors and assigns, as well as
Hamill's heirs, executors, administrators, and legal representatives.

                  11. Notices: All notices required by this Agreement may be
delivered by first class mail at the following addresses:

        To the Company:               Hycor Biomedical Inc.
                                      18800 Von Karman Avenue
                                      Irvine, California 92715

               To Hamill:             Richard D. Hamill
                                      22686 Ledana
                                      Mission Viejo, California 92691

                  12. Amendment. This Agreement may be modified only by written
agreement signed by the party against whom any amendment is to be enforced.

                  13. Choice Of Law: This Agreement shall be governed by the
laws of the State of California.

                  14. Partial Invalidity: In the event any provision of this
Agreement is void or unenforceable, the remaining provisions shall continue in
full force and effect.


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                  15. Waiver: No waiver of any breach of this Agreement shall
constitute a waiver of any subsequent breach.

                  16. Complete Agreement: This Agreement contains the entire
agreement between the parties, and supersedes any and all prior and
contemporaneous oral and written agreements, including Hamill's previous
employment contracts, which shall have no further force and effect.

"Hamill"                                     "Company"

RICHARD D. HAMILL                            HYCOR BIOMEDICAL INC.

______________________________               By:______________________________
                                             Name:___________________________
Dated:________________________               Dated:___________________________


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                                    EXHIBIT A

                       CALIFORNIA LABOR CODE SECTION 2870

                   EMPLOYMENT AGREEMENTS; ASSIGNMENT OF RENTS

        (a) Any provision in an employment agreement which provides that an
employee shall assign, or offer to assign, any of his or her rights in an
invention to his or her employer shall not apply to an invention that the
employee developed entirely on his or her own time without using the employer's
equipment, supplies, facilities, or trade secret information except for those
inventions that either:

               (1) Relate at the time of conception or reduction to practice of
               the invention to the employer's business, or actual or
               demonstrably anticipated research or development of the employer;
               or

               (2) Result from any work performed by the employee for the
               employer.

(b) To the extent a provision in an employment agreement purports to require an
employee to assign an invention otherwise excluded from being required to be
assigned under subdivision (a), the provision is against the public policy of
this state and is unenforceable.


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