Luminex Corporation Third Quarter Earnings Release Scheduled for October 21, 2004

AUSTIN, Texas, Oct. 6 /PRNewswire-FirstCall/ -- Luminex Corporation announced today that it expects to report third quarter 2004 results on Thursday, October 21, 2004. Results are scheduled for release after the close of trading on the Nasdaq Stock Market.

Management will hold a conference call to discuss the operating highlights and financial results for the third quarter on Thursday, October 21, 2004 at 5:00 p.m. Eastern time.

The conference call will be webcast live by CCBN and can be accessed at Luminex Corporation’s website at http://www.luminexcorp.com/ . Simply log on to the web at the address above, go to the Company section and access the Investor Relations link. Please go to the website at least fifteen minutes prior to the call to register, download and install any necessary audio software. If you are unable to participate during the live webcast, the call will be archived for one year on the website http://www.luminexcorp.com/ . To access the replay, click on the ‘replay’ link.

Luminex Corporation develops, manufactures and markets proprietary biological testing technologies with applications throughout the life sciences industry. The Company’s xMAP(TM) system is an open-architecture, multi- analyte technology platform that delivers fast, accurate and cost-effective bioassay results to markets as diverse as pharmaceutical drug discovery, clinical diagnostics and biomedical research, including the genomics and proteomics research markets. The Company’s xMAP technology is sold worldwide and is already in use in leading research laboratories as well as major pharmaceutical, diagnostic and biotechnology companies. Further information on Luminex Corporation or xMAP can be obtained on the Internet at http://www.luminexcorp.com/ .

Contact: Luminex Corporation Harriss T. Currie, Chief Financial Officer, VP - Finance 512.219.8020 hcurrie@luminexcorp.com

Luminex Corporation

CONTACT: Harriss T. Currie, Chief Financial Officer, VP - Finance ofLuminex Corporation, +1-512-219-8020, or hcurrie@luminexcorp.com