F3SG-2RE0510P30 Light Curtain, Sender & Receiver, 24 Beams, 30mm Resolution. The Omron F3SG-RE series light curtain is a hand protection safety sensor. This is a sender and receiver component type with 24 beams and 30mm resolution. The easy-to-use safety light curtain is ideal for simple ON/OFF detection applications. The curtain is available in Type 2 (PL c) with self-test function. It is simple to mount, operate and maintain.