DiaSys Appoints Exclusive Distributor for Mexico.

Business Editors/Health/Medical Writers

WATERBURY, Conn.--(BUSINESS WIRE)--June 24, 2003

DiaSys Corporation (AMEX:DYX), a global healthcare products company, today announced that it has entered into an exclusive two-year Sales and Service Agreement with Alta Tecnologia en Laboratorios, S.A. de C.V.. Under the agreement, Alta Technologia en Laboratorios, S.A. de C.V will promote, sell and service DiaSys' complete product offering of laboratory instruments and laboratory consumables in Mexico.

Marshall Witzel, DiaSys' CEO said, "The addition of ATL to our family of international distributors is a perfect fit to promote DiaSys products in Mexico, since ATL is also the exclusive distributor for Olympus microscopes for Mexico. Our instruments attach to microscopes, thereby enabling ATL to offer a system sale to their customers." He further said, "We are delighted with the commitment ALT has made to promote DiaSys products throughout Mexico as evidenced by their initial order of more than $100,000 of instruments and consumables."

Richard Sledziona, DiaSys' Director of Strategic Markets said, "The hospital market alone in Mexico is quite substantial with 1005 government owned and 2822 private hospitals. We are confident that ALT will provide exceptional coverage for us in Mexico through their three sales offices, and confident that their expertise in medical clinical, bio-tech, industrial, and veterinary, and petroleum markets in Mexico will result in very significant sales volumes for DiaSys."

DiaSys Corporation designs, develops, manufactures and distributes proprietary medical laboratory equipment, consumables and test kits to healthcare laboratories worldwide. Headquartered in Waterbury, CT, the company operates in Europe through its wholly owned subsidiary based in Wokingham, England and in Pacific Asia through its strategic business partner located in Guangzhou, China. DiaSys, Parasep, and Urisep are registered trademarks of DiaSys Corporation.

This press release contains forward-looking statements within the meaning of, and made pursuant to, the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. The forward looking statements involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of the Company or events, or timing of events, relating to the Company to materially fifer from those expressed or implied by such forward looking statements. DiaSys refers interested parties to its most recent Annual Report on Form 10-KSB and other SEC filings for a complete description of, and discussions about, the Company.