HAWTHORNE, Calif., July 30 -- OSI Systems Inc. announced it has been awarded a $1.49 million contract from a leading defense contractor to supply detectors and electronic assemblies for weapons simulation. The award was made to OSI Systems' wholly owned subsidiary, UDT Sensors. Delivery will begin in the current fiscal quarter. There are 753 suppliers of Sensors & Detectors in the Photonics Marketplace.