Exhibit 32.2

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Luminex Corporation (the "Company")
on Form 10-Q for the period ended September 30, 2005, as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), I, Harriss
T. Currie, Vice President - Finance, Chief Financial Officer and Treasurer of
the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to
ss.906 of the Sarbanes-Oxley Act of 2002, that:

      (1) The Report fully complies with the requirements of Section 13(a) or
15(d) of the Securities Exchange Act of 1934; and

      (2) The information contained in the Report fairly presents, in all
material respects, the financial condition and results of operations of the
Company.

/s/ HARRISS T. CURRIE
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Harriss T. Currie
Vice President - Finance, Chief Financial Officer and Treasurer
November 8, 2005