CORRECTING and REPLACING OSI Systems to Present at the 2009 UBS Global Life Sciences Conference

Presentation time in first graph, second sentence of release should read: 8:30am ET (5:30am PT) (sted 8:30am ET (9:30am PT)).

The corrected release reads:

OSI SYSTEMS TO PRESENT AT THE 2009 UBS GLOBAL LIFE SCIENCES CONFERENCE

OSI Systems, Inc. (NASDAQ:OSIS), a vertically integrated provider of specialized electronics products for critical applications in the Security and Healthcare industries, today announced it will be presenting at the 2009 UBS Global Life Sciences Conference. The presentation is to be held at 8:30am ET (5:30am PT) on Tuesday September 22, 2009.

To listen to the live web cast of the presentation, please visit the investor relations section of the OSI Systems website, http://investors.osi-systems.com/events.cfm, and follow the link.

About OSI Systems, Inc.

OSI Systems, Inc. is a vertically integrated designer and manufacturer of specialized electronic systems and components for critical applications. The Company sells its products in diversified markets, including homeland security, healthcare, defense and aerospace. The Company has more than 30 years of experience in electronics engineering and manufacturing and maintains offices and production facilities located in more than a dozen countries. It implements a strategy of expansion by leveraging its electronics and contract manufacturing capabilities into selective end product markets through organic growth and acquisitions. For more information on OSI Systems Inc. or any of its subsidiary companies, visit www.osi-systems.com.