OSI Systems Announces Third Quarter Conference Call

April 30, 2007: Hawthorne, CA

OSI Systems, Inc. (Nasdaq:OSIS) today announced that it will hold its quarterly conference call on Monday May 7, 2007 at 9:00am PT (12:00pm ET) to discuss its third quarter results for fiscal 2007. The earnings will be released ahead of the conference call at approximately 6:00am PT (9:00am ET).

This call is being webcast by Thomson/CCBN and can be accessed either at www.earnings.com or through www.osi-systems.com.

The webcast will also be distributed over Thomson/CCBN's Investor Distribution Network to both institutional and individual investors. Individual investors can listen to the call through Thomson/CCBN's individual investor center at www.earnings.com or by visiting any of the investor sites in Thomson/CCBN's Individual Investor Network.

A replay of the conference call will be available from 11:00am PT (2:00pm ET) on May 7, 2007 until May 21, 2007. The replay may be accessed by visiting either www.earnings.com or www.osi-systems.com.

About OSI Systems, Inc.

OSI Systems, Inc. and its subsidiaries 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. OSI Systems 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.

For Further Information

OSI Systems Inc                       
12525 Chadron Ave
Hawthorne CA 90250
(310) 349 2237
Contact: Jeremy Norton Director, Investor Relations