The Omron F3SG-4SRA0640-25 is a type-4 safety light curtain from the F3SG-SR series, rated for hand protection with a 25 mm detection capability and a 20 mm beam pitch. Its 32 beams cover a 640 mm protective height, and the operating range spans 0.3 m to 20.0 m, making it suitable for guarding access to hazardous machinery where a person's fingers or hands must be detected before reaching the danger zone. Supply is 24 VDC, and the enclosure carries an IP65/IP67/IP67G rating — dust-tight, waterproof, and oil-resistant, so it holds up in washdown environments like food processing or automotive assembly lines. Built-in blanking and muting functions allow the curtain to ignore fixed obstructions (e.g., a conveyor frame) or temporarily suspend detection during a material pass, which avoids nuisance trips without compromising safety logic.
The 25 mm detection capability means the curtain catches a hand or finger reaching through the beam array — this meets the finger-protection class per IEC 61496-1 for applications where personnel access must be blocked before contact with moving parts. The 640 mm protective height (32 beams at 20 mm pitch) defines the vertical zone it guards; pair it with a controller that matches the resolution class. Operating range of 0.3 m to 20 m gives flexibility for both close-in guarding (e.g., a press infeed) and longer spans across a robot cell.