The Omron F3SG-4SRA0520-25-F is a Type 4 light curtain from the F3SG-SR series, rated for hand protection with a 25 mm detection capability. It projects 26 beams at a 20 mm pitch over a 520 mm protective height, covering an operating range from 0.3 m to 20.0 m. The unit runs on 24 VDC and carries IP65/IP67/IP67G ingress protection — dust-tight, oil-resistant, and waterproof. Built-in blanking and muting functions allow the curtain to ignore fixed obstructions or temporarily suspend safeguarding during material pass-through, which is essential for automated lines where full stop-and-go would kill cycle time.
The 25 mm detection capability is the critical figure for personnel safety: it catches fingers and hands, not just an arm or torso. If your risk assessment calls for finger protection (14 mm or finer), this curtain won't meet it — step up to the 14 mm variant in the same series. The 520 mm protective height and 20 m range suit mid-sized machine openings like press brakes, assembly stations, or palletizing cells. IP67G adds oil resistance, so it holds up in machining environments where coolant mist is present. Blanking and muting are configurable via the controller; verify that your safety PLC or safety relay can handle the OSSD outputs before wiring.