Document:

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                                                                    EXHIBIT 10.9

Confidential Materials omitted and filed separately with the Securities and
Exchange Commissions, Asterisks denote omissions.

                AGREEMENT FOR ELECTRONIC MANUFACTURING SERVICES

          This Agreement between Luminex Corporation, a Delaware corporation
with principal offices at 12212 Technology Boulevard, Austin, Texas 78727
(hereinafter "Luminex"), and Sanmina Corporation, having a place of business at
2300 Highway 79 South, Guntersville, Alabama 35976 (hereinafter "Sanmina") is
entered into effective as of January 1, 2000 (the "Effective Date"). Sanmina
shall perform manufacturing services for Luminex under the terms and conditions
set forth herein.

NOW THEREFORE, for and in consideration of the covenants, conditions, and
undertakings hereinafter set forth, it is agreed by and between the parties as
follows:

I.        Term

          This Agreement shall be in effect for four (4) years from the
Effective Date of this Agreement. Unless either party gives the other party
written notice of its intent not to renew this Agreement at least ninety (90)
days prior to the expiration of the current term, the Agreement shall renew
under the then current terms for successive one (1) year terms.

II.       Scope of Work Performed

          A.   Luminex wishes Sanmina to manufacture on behalf of Luminex a
               range of products, assemblies, and/or subassemblies, hereafter
               called the "Products," identified in and at the prices in Exhibit
               A, as amended in writing from time to time by mutual agreement.
               Sanmina and Luminex shall mutually agree upon a delivery schedule
               for the Products per Section IV of this Agreement.

          B.   Luminex shall be liable for material(s), components, or parts
               that Sanmina procures or otherwise contracts for in order to
               manufacture the products that Luminex wishes to buy from Sanmina
               on a turnkey basis (hereinafter the "Material" or "Materials").
               This liability shall be determined by defining the process that
               incurs this liability and describing the situations or
               circumstances under which Luminex is liable for Material that
               Sanmina has procured per Section IV of this Agreement.

III.      Pricing

          The prices for the Products shown in Exhibit A shall remain fixed for
six (6) months after the Effective Date, thereafter to be reviewed by the
Parties on a semiannual basis. Sanmina agrees that there shall be no increase in
Build Time not due to an ECO (defined below) or a change request from Luminex.
"Build Time" means the amount of time Sanmina requires to assemble and test the
Materials into a finished Product. Notwithstanding the foregoing, the following
exceptions allow prices to be increased or decreased:

       1. ECO - Engineering Change Order (referred to in Section IV.G.) or
             change request; or

       2. Material variations on the market price of components that are the
          basis of the Purchase Order. This will be reviewed and mutually agreed
          to quarterly unless abnormal ["abnormal" defined as greater ten
          percent (10%) variation in Sanmina's cost of Material(s)] changes are
          experienced in material costs; or

       3. If the monthly volume of Products ordered by Luminex under this
          Agreement meets or exceeds [**] units per month for [**]
          consecutive months (the "Established Level"), then the

____________
[**] Indicates that material has been omitted and confidential treatment
requested therefor. All such material has been filed separately with the
Commission pursuant to Rule 406.

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          Materials Mark-up and Profit Gross-up percentages stated in Exhibit A
          will be reviewed and agreed upon at lower or higher percentages,
          respectively. These new percentages will be applied to all subsequent
          shipments. Notwithstanding the foregoing, if the monthly volume of
          Products ordered by Luminex under this Agreement drops below the
          Established Level then in effect, then the percentages will be
          reviewed and agreed upon to lower (Gross-up) or higher (Mark-up)
          percentages, not to exceed the original percentages set out herein as
          of the Effective Date; or

IV.       Forecasting and Ordering

          A. Sanmina shall purchase Materials for the Products in accordance
             with an Approved Vendor List ("AVL"), as provided by Luminex to
             Sanmina from time to time. In the event Sanmina cannot purchase
             Materials from an approved vendor for any reason, including
             unavailability or commercial unfeasibility of the purchase of such
             Materials, Sanmina may purchase such Materials from an alternate
             vendor with the prior written consent of Luminex.

          B. General Planning and Procurement Process

             1. On the date this Agreement is executed and the first business
                day of each calendar month thereafter, Luminex shall provide
                Sanmina with monthly, rolling purchase orders covering a minimum
                period of three (3) months ("Purchase Order").

             2. On the same dates, Luminex shall provide Sanmina with an
                additional monthly, rolling nine (9) month forecast ("Forecast")
                covering the nine (9) months immediately following the Purchase
                Order period. Forecast does not incur any liability for either
                Sanmina or Luminex except that of any long lead-time Materials
                for which the forecast would cause procurement activity, and,
                even in such a situation such liability for Luminex would be
                limited per Section IV.C.

             3. Sanmina will take the Purchase Orders and Forecast referred to
                in Subsections 1 and 2 above and generate a Master Production
                Schedule ("MPS") for a twelve (12) month period using the
                process described in Subsection 4 below.

             4. The MPS will define the master plan on which Sanmina will base
                its procurement, internal capacity projections, and commitments:

                (a) Sanmina will use the Purchase Orders referred to in
                    Subsection 1 above to generate the first three (3) months of
                    the MPS.

                (b) Sanmina will use the Forecast referred to in Subsection 2
                    above to generate the following nine (9) months of the MPS.

             5. Sanmina will release (launch) orders to suppliers of Materials
                sometime prior to the anticipated date that the Material is
                needed. When these orders are launched will depend on the Vendor
                Lead Time that Sanmina will determine from time to time and
                maintain as a parameter of Sanmina's manufacturing or materials
                planning systems.

             6. Sanmina, through its MRP System will also issue an instruction
                ("MRP Signal") to its procurement group to buy the Material in
                order to meet the delivery schedule as specified in the
                respective Purchase Order.

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          7. When Sanmina places an order with its suppliers per the sections
             above, Sanmina will order Materials in various quantities (defined
             in periods-worth-of-supply) that are defined by the Material's ABC
             Classification. This classification as well as the expected
             distribution or characteristics of various classes of Materials,
             and, the periods-worth-of-supply (Periods-of-Supply) that will be
             bought for each class of Material is shown on Exhibit C.

          8. In addition to ordering Materials for various periods-of-supply and
             in order to obtain volume discounts, Sanmina will order Materials
             according to various minimum-buy quantities, tape and reel
             quantities, and multiples of packaging quantities in accordance
             with the Excess Materials provisions of Subsection IV.D.5.

     C.   Liabilities for Materials

          1.  For the purposes of Sections C, D, and E of Article IV,
              "Materials" means without the cost of the Materials Mark-up and is
              at Sanmina's cost. Also, for the purposes of Sections C, D, and E
              of Article IV, Luminex's liability for Materials under these
              section is separate and exclusive of any liability for Materials
              used in completed Products purchased from Sanmina by Luminex per
              the Product Pricing of Exhibit A.

          2.  Luminex's financial liability for Materials that Sanmina has
              procured under this Agreement under valid Forecasts and/or
              Purchase Orders and separate and exclusive of any liability for
              Materials used in completed Products purchased from Sanmina by
              Luminex per the Product Pricing of Exhibit A ("Materials
              Liability"), is limited to the following:

              (a)  Materials that Sanmina, having ordered per the guidelines in
                   Section IV.B. above, cannot cancel prior to its receipt. This
                   includes Materials that may not be cancelable by virtue of
                   having insufficient time between the MRP signal to cancel and
                   the expected or real receipt date at Sanmina. If the receipt
                   of Material cannot be stopped but the Materials can be
                   returned, they will be covered under Subsection (b) below or
                   Section IV.C.2.; and

              (b)  Materials that Sanmina, having ordered per the guidelines
                   above, cannot return to the suppliers that the Materials came
                   from, or other 3/rd/ party, and where Sanmina has made
                   reasonable efforts to return the Materials. Prior to being
                   included in Luminex's liability, Luminex shall be given the
                   option to try to arrange a return for Sanmina; and

              (c)  Material which Luminex and Sanmina agree that the return of
                   such Materials is not required.

          3.  Luminex shall also be liable to Sanmina for other Material-related
              costs separate and exclusive of any liability for Materials used
              in completed Products purchased from Sanmina by Luminex per the
              Product Pricing of Exhibit A. ("Other Material Costs"), which
              shall include:

              (a)  Instances in which Sanmina is able to return Materials with
                   reasonable re-stocking or other fees, those fees shall become
                   part of Luminex's Total Liability in place of the costs of
                   those Materials and markups; and

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              (b)  Associated reasonable expenses related to purchasing,
                   ordering, manufacturing (labor and overhead), shipping,
                   storing, and eliminating such Materials that Sanmina
                   purchases or orders to fulfill a Purchase Order and/or the
                   Forecast on behalf of Luminex to manufacture the Products
                   shall constitute a part of Luminex's Total Liability, such
                   amount not to exceed the current Materials Mark-up; and

              (c)  If necessary and with Luminex's prior, written consent,
                   Sanmina shall purchase any necessary tools to fulfill the
                   Purchase Order and Forecast. Such tools shall be deemed a
                   part of Luminex's Total Liability. All such tooling purchased
                   by Sanmina shall remain Luminex's sole property, and Sanmina
                   shall return such tooling (normal wear and tear excepted) to
                   Luminex upon request, the completion of the relevant order,
                   or the termination of the Agreement. Such tooling may only be
                   used by Sanmina to fulfill its obligations hereunder to
                   Luminex.

          4.  Except as otherwise provided herein, Luminex's total financial
              liability for Materials and separate and exclusive of any
              liability for Materials used in completed Products purchased from
              Sanmina by Luminex per the Product Pricing of Exhibit A ("Total
              Liability"), shall be the sum of: (i) Materials Liability plus the
              agreed upon Materials Mark-up per Exhibit A, and (ii) Other
              Material Costs. Sanmina shall use commercially reasonable efforts
              to minimize the Total Liability consistent with meeting the
              production requirements of this Agreement.

     D.   Excess Material

          1.  "Excess Material" and "Excess Materials" mean Materials greater
              than the quantity needed to fulfill all outstanding or open
              Purchase Orders submitted to Sanmina by Luminex hereunder.

          2.  Sanmina agrees to provide Luminex with monthly progress Excess
              Reserve Detail Reports which shall detail any Excess Materials.
              Luminex agrees to review and notify Sanmina, in writing, within
              thirty (30) days of any issues regarding the composition of the
              Excess Materials, in response to the Excess Reserve Detail Report.
              Sanmina agrees to use commercially reasonable efforts to reduce
              the amount of Excess Material(s) consistent with meeting the
              production requirements of this Agreement.

          3.  If, at any time at which the total dollar amount of Excess
              Materials exceeds twenty-five thousand dollars ($25,000.00), the
              Parties will, within thirty (30) days, conduct a review of the
              composition of Excess Materials and alternative means of reducing
              the level of such Excess Materials; e.g., by returns, sales, etc..
              If, after such review, Luminex's responsibility for Excess
              Materials would still exceed twenty-five thousand dollars
              ($25,000.00), then Luminex will, within fourteen (14) days, either
              (1) issue a Purchase Order for the delivery of that portion over
              twenty-five thousand dollars ($25,000.00), or (2) issue sufficient
              top level Purchase Orders to result in the consumption of said
              Excess Materials.

          4.  Upon termination of this agreement by notice per Section X.A.,
              Luminex agrees to purchase Excess and Unallocated Material it is
              responsible for creating through MRP driven demand for forecast,
              production, and minimum buy requirements per the provisions of
              Section IV. Within thirty (30) days of notification of
              termination, Luminex will provide Sanmina with the address where
              Excess Material is to be shipped, or arrange for pick-up by third
              party purchasers from Sanmina's facility.

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          5.  In order to simplify and expedite the process of placing orders
              with vendors, where minimum buys are required, and the minimum buy
              order would create an Excess Material condition, this Agreement
              authorizes Sanmina to make those purchases under the following
              guidelines:

              (a) Sanmina may make purchases for line items which total extended
                  excess cost to Sanmina does not exceed five hundred dollars
                  ($500.00); and

              (b) In the event a line item increases Excess Materials by five
                  hundred dollars ($500.00) or more, Sanmina shall notify
                  Luminex in writing within one (1) week. Luminex will, within
                  one (1) week, provide written authorization to place the
                  order.

     E.   Unallocated Materials

          1.  "Unallocated Material" and "Unallocated Materials" are defined as
              Material or Materials for which there are no open or outstanding
              Purchase Orders. Unallocated Material is identified on Excess
              Reserve Detail Reports as those items having zero (0) demand.

          2.  Sanmina agrees to include in the aforementioned monthly Excess
              Reserve Detail Reports details of any Unallocated Materials.
              Luminex agrees to review and notify Sanmina, in writing, within
              thirty (30) days of any issues regarding the composition of
              Unallocated Material, in response to the Excess Reserve Detail
              Report. After such review, Luminex will, within fourteen (14)
              days, either (1) issue a Purchase Order for the delivery of
              Unallocated Material, or (2) issue sufficient top level Purchase
              Orders to result in the consumption of said Unallocated Material.

     F. Reschedules

          1.  Luminex may reschedule delivery dates of Products subject to the
              matrix set forth on Exhibit D.

          2.  For a decrease in quantity of Products to be delivered on a
              specific delivery date, Sanmina and Luminex shall mutually agree
              upon a date to deliver the undelivered Products.

          3.  For an increase in quantity of Products to be delivered on a
              specific delivery date, Sanmina, on a best efforts basis, will
              attempt to accommodate such increase.

          4.  If any change in the delivery dates of any results in additional
              expenses to Sanmina to store such Products or to acquire
              additional Materials, such additional expenses as are reasonably
              incurred and documented shall be deemed part of Luminex's Total
              Liability with Luminex's prior approval.

     G. Revisions

          In the event Luminex requests an engineering change to a product,
     Sanmina shall notify Luminex of any impact on the cost and/or scheduled
     delivery of such Products within five (5) business days of the receipt of
     Luminex's request in reasonable detail with supporting documentation.
     Sanmina will use its best efforts to reduce the impact the costs of any
     change order. Unless Luminex consents to the amended notification from
     Sanmina, the requested

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     engineering change shall be deemed canceled and Luminex will be notified in
     writing. Any increases in the cost of the Products resulting from such
     Engineering Change Order ("ECO") shall be deemed a part of Luminex's Total
     Liability. Similarly, any Materials made obsolete or excess as a result of
     such an ECO shall be deemed part of Luminex's Total Liability.

     H. Cancellations

        Luminex may cancel any Purchase Order by notifying Sanmina in writing at
     least thirty (30) days prior to the delivery date of such order.  Within
     thirty (30) days of such cancellation, Sanmina shall provide Luminex with
     the amount of the Total Liability under Section IV related to such canceled
     Purchase Order. To the extent practical, any Materials resulting from a
     cancellation shall be used to fulfill other Purchase Orders. If a
     sufficient amount of purchases is not forecasted to consume such materials
     within the next sixty (60) day period, with respect to the Excess Materials
     Luminex shall pay such cancellation amount to Sanmina on a net-30 day
     basis.  After receipt of such cancellation amount, Sanmina shall deliver to
     Luminex, at Luminex's expense, any remaining Materials purchased but unused
     as a result of such cancellation, or scrap Materials, at the sole
     discretion of Luminex.

V.   Delivery

     A.  Delivery of all items under this Agreement shall be delivered F.O.B.
         Sanmina's Plant located at the address specified in Exhibit A to the
         common carrier specified from time to time by Luminex ("Delivery
         Point"). Upon delivery to the common carrier, risk of loss and title
         shall pass to Luminex. Sanmina will provide insurance for the value of
         the Material (with any deductible to be approved by Luminex) until
         delivery to the common carrier, and shall name Luminex as an additional
         insured on such policies and furnish Luminex with certificates of
         same..

     B.  Sanmina shall use its best efforts to deliver the Products to the
         Delivery Point on the agreed upon delivery dates. If Products pursuant
         to a Purchase Order are more than thirty (30) days late, then Luminex
         shall have the option to cancel that Purchase Order. If Products
         pursuant to any Purchase Order are more than forty-five (45) days late,
         Sanmina shall be in breach of this Agreement and Luminex shall have the
         option to terminate this Agreement. If Luminex terminates this
         Agreement for Sanmina's failure to timely deliver the Products, Luminex
         shall be liable for the Materials per Section IV.

     C.  Sanmina shall transport the Products using the common carrier and such
         shipment terms as are designated by Luminex from time to time to
         Luminex's address or to an address specified in writing by Luminex. All
         freight, insurance, and other shipping expenses from the delivery point
         shall be borne by Luminex. When special packaging is requested or, in
         the opinion of Sanmina is required under the circumstances, the
         additional expenses related to such special packaging shall also be
         borne by Luminex if agreed to in advance by Luminex.

VI.  Payment and Invoicing

     Payment terms will be net-30 (thirty) days from invoice date, provided it
is not earlier than the ship date.  Sanmina will provide Luminex with a credit
limit adequate to equal or exceed six (6) months of projected shipments of the
Products to Luminex. In the event that Luminex exceeds this credit limit or has
undisputed outstanding invoices for more than sixty (60) days and such credit
limit remains exceeded or such invoices remain outstanding, as applicable, ten
(10) days after Luminex has received notice thereof, Sanmina may stop shipments
of Products to Luminex until Luminex makes sufficient payment to

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bring its account consistent with terms outlined above. Sanmina may reduce the
credit limit with sixty (60) days prior written notice to Luminex, provided,
that Luminex may terminate this Agreement on thirty (30) days prior written
notice if such credit limit is reduced by more than ten percent (10%).

VII.  Warranty

      A.  Sanmina warrants that each Product shall at the time of delivery be
          new and free and clear of all liens and encumbrances. Sanmina warrants
          that the Products shall be free from any defects in workmanship for a
          period of one (1) year from the date of manufacture except to the
          extent that such defects are caused by components purchased from
          third-party vendors but not Sanmina-owned companies ("Vendor
          Components"). Warranty on components is limited to the warranty
          provided by the component manufacturer. Sanmina, to the extent
          permitted, hereby agrees to assign to Luminex any unexpired warranties
          for such Vendor Components provided by third-party vendors or passed
          on by such third-party vendors from the original manufacturers until
          the expiration of such warranties. Sanmina shall execute any documents
          necessary to assign such warranties to Luminex. As Luminex's remedy
          under Sanmina's warranty, Sanmina will, at no charge, rework, repair,
          and retest any such Products returned to Sanmina and found to contain
          defects in workmanship, provided, however, in the event such Product
          cannot be repaired or replaced within thirty (30) days of return by
          Luminex, Luminex may elect a refund of the purchase price for the
          applicable Product. Sanmina will return defective Vendor Components to
          third party vendors for warranty replacement or repair from the
          original manufacturers. All reasonable transportation and expenses
          arising from shipping the non-conforming Products to and the
          replacement Products from the shipping location shall be paid by
          Sanmina to the extent the Products are defective due to Sanmina's
          workmanship. However, if a Product returned to Sanmina for replacement
          proves to be not defective, Luminex shall reimburse Sanmina for all
          transportation expenses incurred by Sanmina in connection with the
          shipment of such Products to Sanmina and its return by Sanmina.
          Warranty coverage does not include failures due to Luminex design
          errors, the supply or selection by Luminex of improper or defective
          parts or materials used by Luminex, damages caused by Luminex's
          misuse, unauthorized repair, or negligence. Sanmina does not assume
          any liability for low-cost, expendable items such as lamps and fuses.
          Sanmina reserves the right to inspect the Products, Materials, and
          Vendor Components and verify that they are defective or non-
          conforming.

      B.  The performance of any repair or replacement by Sanmina does not
          extend the warranty period for any Products beyond the period
          applicable to the Products originally delivered; provided, however,
          that the warranty period shall extend for a period of time equal to
          the time elapsed from notice to Sanmina of a warranty claim until
          redelivery of the repaired or reworked product.

      C.  EXCEPT FOR THE ABOVE EXPRESS WARRANTIES, SANMINA MAKES AND LUMINEX
          RECEIVES NO WARRANTIES OR CONDITIONS ON, THE PRODUCTS, EXPRESS,
          IMPLIED, STATUTORY, OR OTHERWISE, AND SANMINA SPECIFICALLY DISCLAIMS
          ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
          PURPOSE.

VIII. General Indemnity

      A.  Sanmina shall defend, indemnify and save harmless Luminex from any
          liability or claim (including, without limitation, the costs and
          reasonable attorney's fee in connection therewith) to the extent such
          liability or claim is based upon an allegation that, by reason of
          processes

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          used by Sanmina or otherwise, a Product infringes, under the
          applicable law of the United States, Canada or any other country to
          which Sanmina or Luminex may have delivered the allegedly infringing
          Product, any Intellectual Property of a third party. Luminex shall
          promptly notify Sanmina of any such claim or proceeding brought
          against it and grant Sanmina the right of defense in any such claim or
          proceeding, and Luminex shall provide all information and reasonable
          assistance, all at Sanmina's expense, in the defense of such a claim
          or proceeding.

      B.  Sanmina's obligation to indemnify Luminex under this Article shall not
          apply to any liability for such infringement based solely upon a
          Product being manufactured in compliance with Luminex's specific
          design requirements, or the application of a Product by Luminex in an
          unintended manner. Each party shall indemnify the other party against,
          and hold it harmless from any loss, cost, liability, or expense
          (including court costs and the reasonable fees of attorneys and other
          professionals) to the extent that such loss, cost, liability, or
          expense arises out of, or in connection with, in whole or in part, (A)
          infringements of any patent, trademark, copyright, or other
          intellectual property of another party by the other party or (B) any
          gross negligence or willful misconduct by the other party, its
          employees or agents and subcontractors, including but not limited to
          any such act or omission that causes: (i) any bodily injury, sickness,
          disease, or death; (ii) any injury or destruction to tangible or
          intangible property of the injured party or any loss of use resulting
          therefrom; or (iii) any violation of any statute, ordinance, or
          regulation.

IX.   Quality, Inspection, and Reporting

      A.  Luminex will have the right at reasonable times, upon reasonable
          advance notice, to visit Sanmina's plant to inspect the work performed
          on the Products, the Materials, and the Vendor Components. Such
          inspection shall not relieve Sanmina of any of its obligations under
          the Agreement or Purchase Orders. Sanmina shall provide Luminex with
          all mutually agreed upon quality reports at agreed upon intervals.
          Sanmina reserves the right to restrict Luminex's access to the plant
          or any area within it as necessary to protect confidential information
          of Sanmina or its other Customers.

      B.  If Luminex demands inspection of the Products prior to the delivery of
          such Products as a condition of acceptance of such Products, Luminex
          must inspect the Products within five business (5) days of a
          transmission of written notice by facsimile or other electronic or
          telephonic delivery system from Sanmina informing Luminex that the
          Products are ready to be shipped. If Luminex does not inspect the
          Products within such five-business-day period, Luminex shall be deemed
          to have waived its right to inspect the Products as a condition of
          acceptance of such Products. This does not disallow rejection of the
          Products after incoming inspection if such inspection determines that
          the shipment does not meet the agreed to specifications.

      C.  Luminex and Sanmina will implement a joint quality improvement program
          that will develop and implement a continuous quality improvement.

      D.  Luminex and Sanmina will agree on what reports and other items (such
          as reports on component part inventory, products shipped and copies of
          invoices) will be prepared by Sanmina and delivered to Luminex.

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X.   Termination

     A.  Either party may, without penalty, terminate this Agreement upon thirty
         (30) days written notice to the other party in either one of the
         following events:

         1.  The other party materially breaches this Agreement and such breach
             remains uncured for thirty (30) days following written notice of
             breach by the non-breaching party; or

         2.  The other party becomes involved in any voluntary or involuntary
             bankruptcy or other insolvency petition or proceeding for the
             benefit of its creditors, and such petition, assignment or
             proceeding is not dismissed within sixty (60) days after it was
             filed.

     B.  Luminex may, without penalty, terminate this Agreement upon thirty (30)
         days written notice to Sanmina in the event Sanmina has not met, or is
         reasonably expected not to be able to meet, Luminex's requirements for
         Products for a period in excess of sixty (60) days.

     C.  Luminex may, without penalty, terminate this Agreement upon one hundred
         twenty (120) days written notice to Sanmina.

     D.  Upon termination, Sanmina shall provide Luminex with an invoice of
         Luminex's Total Liabilities per Section IV. In addition, Luminex shall
         be liable for work-in-progress and any outstanding charges per Section
         IV. Upon termination, Luminex shall pay all undisputed invoice charges
         on a net thirty (30) days basis.

XI.  Limitation of Liability

     IN NO EVENT WILL EITHER PARTY BE LIABLE FOR ANY SPECIAL, INDIRECT,
CONSEQUENTIAL, OR INCIDENTAL DAMAGES, HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, ARISING IN ANY WAY OUT OF THIS AGREEMENT.  THIS LIMITATION WILL APPLY
EVEN IF A PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, AND
NOTWITHSTANDING ANY FAILURE OF ESSENTIAL PURPOSE OF ANY LIMITED REMEDY PROVIDED
HEREIN.

XII. Miscellaneous

     A.  Notices. Any notice or report required or permitted to be given or made
         under this Agreement by either party shall be in writing and delivered
         to the other party at its address indicated below (or to such other
         address as a party may specify by notice hereunder) by courier or by
         registered or certified airmail, postage prepaid, or by facsimile;
         provided, however, that all facsimile notices shall be promptly
         confirmed, in writing, by registered or certified airmail, postage
         prepaid. All notices shall be effective as of the date received by the
         addressee.

               Sanmina address:

               Sanmina Corporation
               2300 Highway 79 South
               Guntersville, AL 35976

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               Luminex address:

               Luminex Corporation
               12212 Technology Blvd.
               Austin, TX 78727

     B.     Confidential Information. "Confidential Information" shall mean all
            confidential documentation and information provided to the other
            party under this Agreement and all information previously supplied
            by Luminex to Sanmina regarding the Luminex 100 or Luminex
            technology or intellectual property. All Confidential Information
            shall remain the property of its owner. The parties grant to each
            other a nontransferable and nonexclusive right to use Confidential
            Information, solely in the performance of this Agreement and, unless
            prior consent in writing is obtained or disclosure is required by
            law (in which case the disclosing party shall provide the other
            party advance notice and an opportunity to prevent disclosure of
            such Confidential Information), such Confidential Information shall
            not be disclosed, except for any part thereof that is known to be
            free of any obligation to keep it in confidence or that becomes
            generally known to the public through acts not attributable to the
            party under an obligation to keep the Confidential Information
            confidential.

     C.     Intellectual Property. Except as expressly provided in this
            Agreement, nothing in this Agreement is to be construed as granting
            to Sanmina a license or any other intellectual property right to
            utilize any information (including Confidential Information)
            received from Luminex or under any patent or other intellectual
            property right, and Sanmina recognizes that Luminex is the owner of
            all such rights, including all goodwill relating thereto.

     D.     Governing Law. This Agreement will be governed by and interpreted
            under the laws of the State of Texas, without reference to conflict
            of laws principles.

     E.     Jurisdiction. For any dispute arising out of this Agreement, the
            parties consent to personal and exclusive jurisdiction of and venue
            in the state and federal courts within Travis County, Texas.

     F.     Entire Agreement; Enforcement of Rights. This Agreement sets forth
            the entire agreement and understanding of the parties relating to
            the subject matter herein and therein and merges all prior
            discussions between them. No modification of or amendment to this
            Agreement, nor any waiver of any rights under this Agreement, will
            be effective unless in writing and signed by a duly authorized
            representative of the party to be charged. The failure by either
            party to enforce any rights thereunder will not be construed as a
            waiver of any rights of such party.

     G.     Severability. If any provision of this Agreement is held to be
            illegal, invalid, or unenforceable under present or future state or
            federal laws or rules and regulations promulgated thereunder
            effective during the term hereof, such provision shall be fully
            severable, and this Agreement shall be construed and enforced as if
            such illegal, invalid, or unenforceable provision had never
            comprised a part hereof, and the remaining provisions hereof shall
            remain in full force and effective and shall not be affected by the
            illegal, invalid, or unenforceable provision or by its severance
            herefrom. Furthermore, the parties hereto agree to negotiate in good
            faith to modify and amend this Agreement so as to effect the
            original intent of the parties as closely as possible with respect
            to those provisions which were held to be illegal, invalid, or
            unenforceable.

                                       10
<PAGE>

     H.     Assignment. The rights and liabilities of the parties hereto will
            bind and incur to the benefit of their successors, executors or
            administrators; provided, that this Agreement may not be assigned by
            either party hereto without the prior written consent of the other
            party, which shall not be unreasonably withheld. Any assignment or
            any attempted assignment without such written consent shall be void
            and of no effect. For purposes hereof, any transaction or series of
            related transactions (whether by sale of stock, issuance of new
            stock, merger or otherwise) that results in the transfer of
            ownership of 50% or more of the capital stock of Sanmina shall be
            deemed to be an assignment.

     I.     Force Majeure. Neither party will be liable to the other for any
            default thereunder if such default is caused by an event beyond such
            party's control, including without limitation acts or failures to
            act of the other party, strikes or labor disputes, component
            shortages, unavailability of transportation, floods, fires,
            governmental requirements and acts of God (a "Force Majeure Event").
            In the event of threatened or actual non-performance as a result of
            any of the above causes, the non-performing party will exercise
            reasonable efforts to avoid and cure such non-performance. Should a
            Force Majeure Event prevent a party's performance thereunder for a
            period in excess of forty-five (45) days, then the other party may
            elect to terminate this Agreement by written notice thereof.

     J.     Allocation. In the event of Force Majeure or any other shortfall in
            Sanmina's manufacturing capacity, Sanmina will allocate to Luminex
            Products capacity allocation no less favorable than that offered to
            any other Sanmina customer.

     K.     Counterparts. This Agreement may be executed in two or more
            counterparts, each of which will be deemed an original and all of
            which together will constitute one instrument.

     L.     Non-Exclusive. This Agreement is not exclusive and, subject to the
            obligations of this agreement, including but not limited to
            confidentiality and the intellectual property rights of each party,
            Luminex shall be free to have other parties manufacture products for
            Luminex, and Sanmina shall be free to manufacture products for other
            purchasers.

     M.     Advice of Counsel. Sanmina and Luminex have each consulted counsel
            of their choice regarding this Agreement, and each acknowledges and
            agrees that this Agreement shall not be deemed to have been drafted
            by one party or another and will be construed accordingly.

IN WITNESS WHEREOF, the parties hereto have caused their duly authorized
representatives to execute this Agreement.

SANMINA CORPORATION                     LUMINEX CORPORATION

By: /s/ Gary Switzer                    By: /s/ Van S. Chandler
   --------------------------              ---------------------------------

Name: Gary Switzer                      Name: Van S. Chandler
     ------------------------                -------------------------------

Title: Director of Operations           Title: Vice President of Instruments
      -----------------------                 ------------------------------

                                       11
<PAGE>

                                   Exhibit A

                                PRODUCT PRICING

Products Covered:  Luminex 100 and Various Subassemblies

Pricing for Products on a per unit basis:

<TABLE>
<CAPTION>
_________________________________________________________________________________________________________
<S>                          <C>
Cost of Materials            Cost of Materials to Sanmina
---------------------------------------------------------------------------------------------------------
Materials Mark-up            Cost of Materials multiplied by [**]% (the "Materials Mark-up")
---------------------------------------------------------------------------------------------------------
Labor                        Build Time multiplied by $[**]
---------------------------------------------------------------------------------------------------------
Subtotal                     Sum of Cost of Materials, Materials Mark-up and Labor
---------------------------------------------------------------------------------------------------------
Total                        Subtotal [**] (the "Profit Gross-up")
---------------------------------------------------------------------------------------------------------
</TABLE>

The parties agree that the Product Pricing per this exhibit shall be reviewed
quarterly

-----------
[**] Indicates that material has been omitted and confidential treatment
requested therefor. All such material has been filed separately with the
Commission pursuant to Rule 406.
                                       12
<PAGE>

                                   EXHIBIT B

            ABC CLASSIFICATIONS, DESCRIPTIONS AND PERIODS-OF-SUPPLY

<TABLE>
<CAPTION>
--------------------------------------------------------------------------------------------------------
                                                     Expected              Periods Worth of Supply
      Class               Expected               Percentage of Total        to be Bought with Each
                       Percentage of               Value (Gross              Order (if necessary to
                      Total Materials              Requirements)              meet the scheduled
                                                                                requirements)
-------------------------------------------------------------------------------------------------------
<S>                   <C>                        <C>                       <C>
A                       3%                            80%                          1 Month
-------------------------------------------------------------------------------------------------------
B                      17%                            17%                          3 Months
-------------------------------------------------------------------------------------------------------
C                      80%                             3%                          6 Months
-------------------------------------------------------------------------------------------------------
</TABLE>

                                       13
<PAGE>

                                   EXHIBIT C

                                  RESCHEDULES

<TABLE>
<CAPTION>
---------------------------------------------------------------------------------------------------------
 Notice Prior to Original Delivery Date (or Current Delivery      Percentage of Original Quantity that
     Date if valid for more than 30 days calendar days)                   can be Rescheduled
---------------------------------------------------------------------------------------------------------
<S>                                                                        <C>
          0 to 30 days                                                            10%
---------------------------------------------------------------------------------------------------------
         31 to 60 days                                                            45%
---------------------------------------------------------------------------------------------------------
         61 to 90 days                                                            90%
---------------------------------------------------------------------------------------------------------
        Beyond 90 Days                                                           100%
---------------------------------------------------------------------------------------------------------
</TABLE>

As an example, if Luminex notifies Sanmina in writing between thirty-one (31)
and sixty (60) days prior to the scheduled delivery date of the Products,
Luminex may reschedule a maximum of forty-five percent (45%) of the total amount
of the Products to be delivered on such date.

                                       14<PAGE>

                                                                   EXHIBIT 10.10

                             CONSULTANT AGREEMENT
                             --------------------

          THIS CONSULTANT AGREEMENT (the "Agreement") is made and entered into
as of this 1st day of June, 1999 (the "Effective Date"), by and between A.
Sidney Alpert ("Consultant") and Luminex Corporation (the "Company"). In
consideration of the covenants, representations and agreements set forth below,
the Company and Consultant hereby agree as follows:

     1.   Retention as Consultant.  The Company hereby retains Consultant, and
          -----------------------
Consultant hereby agrees to render services to the Company, upon the terms and
conditions contained in this Agreement.

     2.   Term of the Agreement. The initial term of this Agreement (the "Term")
          ---------------------
shall commence upon the Effective Date and shall terminate one (1) year
thereafter (the "Termination Date"), unless sooner terminated as provided
herein; provided, however, that if, prior to the Termination Date, the Company
        --------  -------
and Consultant mutually agree to renew the Agreement, it shall continue for an
additional one (1) year term (the "Additional Term").

     3.   Services to be Provided by Consultant.
          -------------------------------------

          3.1  Scope, Responsibilities and Duties.  Consultant agrees to provide
               ----------------------------------
consulting services to the Company, generally in the fields of intellectual
property, contract negotiations, and general business strategy, approximately
one working day in each working week, so that the Company may have the benefit
of the experience and knowledge possessed by Consultant (the "Services").
Consultant will determine the method, details, and means of performing the
Services in conjunction with the Company. It shall be the duty of Consultant in
rendering the Services to make such periodic reports to the Company as the
officers or directors of the Company may, from time to time, reasonably request.

          3.2. Non-exclusivity.  Subject to the provisions of Section 7 below,
               ---------------
Consultant by reason of the obligations ascribed to him hereunder, shall not be
required to devote more than the time set forth in Section 3.1 to the affairs of
the Company, and Consultant may accept other employment and perform services for
others.

     4.   Compensation.  As sole compensation for the Services to be provided by
          ------------
Consultant to the Company, the Company shall pay to Consultant, and Consultant
agrees to accept, the sum of Five Thousand Eight Hundred Thirty-Three Dollars
($5,833.00) per month. Consultant shall not be entitled to any other
compensation for the Services to be provided hereunder, except as provided
herein. The Company shall not be responsible for withholding from the
compensation payable to Consultant any amounts for federal, state or local
income taxes, social security or state disability or unemployment insurance.

     5.   Expenses.  Upon receipt of itemized vouchers, expense account reports
          --------
and supporting documents submitted to the Company in accordance with the
Company's procedures, then in effect, the Company shall reimburse Consultant for
all reasonable and necessary business expenses incurred ordinarily and
necessarily by Consultant in connection with the performance of Consultant's
duties hereunder.

     6.   Termination.  Termination pursuant to this Section shall become
          -----------
effective immediately upon receipt by Consultant of written notice from the
Company of such termination.
<PAGE>

          6.1  Termination for Cause.  The Company may terminate this Agreement
               ---------------------
for cause at any time during the Term or any Additional Term without further
obligation or liability to Consultant. For purposes of this subsection, "cause"
shall mean (a) a willful breach by Consultant of any material provision of this
Agreement; or (b) if Consultant is convicted of a felony.

          6.2  Termination by Incapacity or Disability of Consultant.  If,
               -----------------------------------------------------
during the Term or any Additional Term, Consultant shall become unable to fully
perform the Services in accordance with the terms of this Agreement due to
incapacity, ill health or disability for a consecutive period of four weeks, the
Company may, at its option, terminate this Agreement.

          6.3  Death of Consultant.  Upon the death of Consultant, this
               -------------------
Agreement shall terminate without further obligation or liability on the part of
the Company to Consultant's estate.

     7.   Covenant Not to Compete, Confidentiality and Trade Secrets.
          ----------------------------------------------------------

          7.1  Covenant Not to Compete.  Consultant shall not, during the Term
               -----------------------
or any Additional Term of this Agreement and for a period of two (2) years
immediately following the termination of this Agreement, or any extension
thereof, for any reason, either directly or indirectly: (a) call on, solicit, or
take away any of the Company's customers or potential customers about whom
Consultant became aware as a result of Consultant's services to the Company,
either for Consultant or for any other person or entity; or (b) solicit or take
away or attempt to solicit or take away any of the Company's employees or
contractors either for Consultant or for any other person or entity. Consultant
further agrees that, during the Term or any Additional Term of this Agreement,
he shall not, at any time, directly or indirectly, whether or not for
compensation, engage in or have any interest in any person, firm, corporation or
business (whether as an employee, shareholder, proprietor, officer, manager,
director, agent, security holder, trustee, consultant, partner, creditor lending
credit or money for the purpose of establishing or operating any such business
or otherwise) which engages in flow cytometry based assays or testing technology
or which directly competes with the business of the Company; provided however,
                                                             -------- -------
that Consultant may own securities of another entity, so long as such ownership
of securities does not constitute more than five percent (5%) of the outstanding
securities of such company.

          7.2  Confidentiality.  Consultant acknowledges and agrees that during
               ---------------
the Term or any Additional Term of this Agreement, he will become privy to
important proprietary, confidential business information and trade secrets that
are the exclusive property of the Company. This information includes, without
limitation, business plans, marketing concepts, designs, proposals, product
information, financial information, technology and costs, pricing information,
customer lists, and key accounts, including their credit information and product
wants and needs (the "Confidential Information"). This Confidential Information
derives independent economic value, both actual and potential, from not being
generally known to the public or to other persons who can obtain economic value
from its disclosure and use. As the Company has always held the Confidential
Information as proprietary, confidential trade secret information and has taken
steps to insure that the Confidential Information is not disclosed outside of
Luminex, the Confidential Information constitutes "trade secrets" under the
Uniform Trade Secrets Act. In light of the foregoing, Consultant therefore
agrees that: (1) he will not at any time, now or in the future, share,
disseminate, disclose, discuss or use the Confidential Information in any way;
and (2) upon termination of this Agreement, Consultant will return to the
Company all property, writings and/or documents in his possession or custody
belonging to or relating to the affairs of the Company or any of its
subsidiaries or affiliates, or comprising or relating to the Confidential
Information.

                                       2
<PAGE>

     8.   Ownership of Intellectual Property.
          ----------------------------------

          8.1       Consultant hereby acknowledges and agrees that any and all
copyrightable works authored by Consultant in connection with the performance of
the Services, alone or with others, during the Term or any Additional Term of
this Agreement, shall be deemed to have been specially ordered or commissioned
for use as either a contribution to a collective work, as a translation, as a
supplementary work, as a compilation, or as an instructional text and, as such,
shall be deemed to be "works for hire" under the United States copyright laws
from the inception of creation or such works. In the event that any such works
shall be deemed by a court of competent jurisdiction not to be a "work made for
hire," this Agreement shall operate as an irrevocable assignment by Consultant
to the Company of all right, title and interest in and to such works, including
without limitation, all worldwide copyright interests therein, in perpetuity.
The fact that such copyrightable works are created by Consultant outside of the
Company's facilities or other than during Consultant's working hours with the
Company, shall not diminish Company's rights with respect to such works which
otherwise fall within this subsection. Consultant agrees to execute and deliver
to Company such further instruments or documents as may be requested by the
Company in order to effectuate the purposes of this subsection.

     9.   Relationship of the Parties.
          ---------------------------

          9.1       Consultant enters into this Agreement as, and shall continue
to be, an independent contractor. The parties agree that no employment
relationship, partnership, joint venture or other association shall be deemed
created by this Agreement. Under no circumstances shall Consultant look to the
Company as his employer, or as a partner, agent, or principal. Consultant shall
not be entitled to any benefits accorded to the Company's employees including,
without limitation, workers' compensation, disability insurance, vacation or
sick pay.

          9.2       Consultant shall have the entire responsibility to discharge
any and all obligations under federal, state or local laws, regulations or
orders now or hereafter in effect, relating to taxes, unemployment compensation
or insurance, social security, workers' compensation, disability pensions and
tax withholdings (the "Tax Obligations"). Consultant hereby agrees to indemnify
and hold the Company harmless for any and all claims, losses, costs, fees,
liabilities, damages or injuries suffered by the Company arising out of
Consultant's failure to properly discharge the Tax Obligations.

     10.  Stock Options.  Concurrently with the execution of this Agreement,
          -------------
Consultant and the Company are executing and delivering the Stock Option
Agreement (the "Option Agreement") attached hereto as Exhibit A and incorporated
herein by this reference, which grants to Consultant the option to purchase
twenty-five thousand (25,000) shares of the Common Stock of the Company at an
exercise price of $8.00 per share over a period of three(3) years, upon the
terms and conditions set forth in the Option Agreement which shall be issued to
and governed in accordance with the Luminex Corporation Stock Option Plan (the
"Plan").

     11.  Arbitration.
          -----------

          11.1      Any dispute regarding any aspect of this Agreement or any
act which would violate any provision in this Agreement (hereafter referred to
as "arbitrable dispute") shall be resolved by an experienced arbitrator licensed
to practice law in the State of Texas and selected in accordance with the rules
of the American Arbitration Association, as the exclusive remedy for such
dispute. Judgment on any award rendered by such arbitrator may be entered in any
court having proper jurisdiction.

                                       3
<PAGE>

          11.2 Should Consultant or the Company institute any legal action or
administrative proceeding regarding any dispute or matter covered by this
Section by any method other than said arbitration, the responding party shall be
entitled to recover from the other party all damages, costs, expenses and
attorneys' fees incurred as a result of such action.

     12.  Severability and Governing Law.
          ------------------------------

          12.1 Should any of the provisions in this Agreement be declared or be
determined to be illegal or invalid, all remaining parts, terms or provisions
shall be valid, and the illegal or invalid part, term or provision shall be
deemed not to be a part of this Agreement.

          12.2 This Agreement is made and entered into in the State of Texas and
shall in all respects be interpreted, enforced and governed under the laws of
Texas.

     13.  Proper Construction.
          -------------------

          13.1 The language of all parts of this Agreement shall in all cases be
construed as a whole according to its fair meaning, and not strictly for or
against any of the parties.

          13.2 As used in this Agreement, the term "or" shall be deemed to
include the term "and/or" and the singular or plural number shall be deemed to
include the other whenever the context so indicates or requires.

          13.3 The paragraph headings used in this Agreement are intended solely
for convenience of reference and shall not in any manner amplify, limit, modify
or otherwise be used in the interpretation of any of the provisions hereof.

     14.  Entire Agreement.  This Agreement is the entire agreement between
          ----------------
Consultant and the Company and fully supersedes any and all prior agreements or
understandings between the parties pertaining to its subject matter.

     15.  Notices.  All notices, requests, demands and other communications
          -------
called for or contemplated under this Agreement shall be in writing and shall be
deemed to have been duly given when personally delivered, on the date of
transmission if sent by facsimile, on the third day after mailing if mailed to
the party to whom notice is to be given, by first class mail, postage prepaid,
and properly addressed as follows:

          If to the Company:    Luminex Corporation
                                12212 Technology Drive
                                Austin, TX  78727-6115
                                Attention:  John Dapper

          If to Consultant:     A. Sidney Alpert
                                26078 Bates Place
                                Stevenson Ranch, CA  91381

     16.  Amendments. This Agreement may not be amended, supplemented,
          ----------
canceled, or discharged except by written instrument executed by the parties
hereto.

                                       4
<PAGE>

     17.  Waivers. All waivers hereunder shall be in writing. No waiver by any
          -------
party hereto of any breach or anticipated breach of any provision of this
Agreement by any other party shall be deemed a waiver of any other
contemporaneous, preceding, or succeeding breach or anticipated breach, whether
or not similar, on the part of the same or any other party.

IN WITNESS WHEREOF, the parties hereto have hereby executed this Agreement as of
the day and year first written above.

                                        LUMINEX CORPORATION

/s/ A. Sidney Alpert                    By: /s/ Mark B. Chandler
-----------------------------              ----------------------------
A. Sidney Alpert                           Mark B. Chandler
                                           President & CEO

                                       5

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