Omron F3SG-4RR1680-25 Safety Light Curtain, Active

This is the core device for point-of-operation guarding on presses, robots, and assembly stations where an operator's hand or body must be detected before a dangerous motion completes. The F3SG-4RR series is Omron's compact, self-contained line; the 4RR suffix indicates a 4-beam, range-adjustable unit with a 1680 mm protective height, and the 25 denotes the 25 mm resolution — enough to catch a finger (the 14 mm threshold for finger detection is tighter, but 25 mm catches a hand or forearm reliably per IEC 61496-2).