The Omron F3SG-4SRA0400-25 is a type-4 safety light curtain from the F3SG-SR series, built for hand detection with a 25 mm detection capability. The 400 mm protective height and 20 mm beam pitch (20 beams total) cover the reach zone on a press brake or assembly station. Operating range spans 0.3 m to 20 m, so it fits both tight guarding and wide access points. The 24 VDC supply is standard for safety controllers. The 25 mm detection capability means a finger-sized object breaks the beam — that is hand protection per IEC 61496-2, not just presence detection. For applications where a 14 mm fingertip curtain is overkill but a 30 mm body curtain is too coarse, this is the middle ground. The 20-beam array gives a 400 mm zone; if you need a taller field, the F3SG-SR family scales in 100 mm increments. Blanking and muting functions are onboard. Blanking lets you pass fixed obstructions like a fixture through the field without tripping; muting suspends the curtain during a material pass, common on conveyor infeed stations. Both are configurable without an external safety controller if the curtain's internal logic handles the sequence.
IP65/IP67/IP67G ingress protection — the G suffix means the optics and housing resist oil and washdown chemicals, not just water jets. That puts it on food-and-bev lines or machining centers where coolant mist and caustic wash cycles kill a standard IP67 sensor. Operating temperature -30°C to 55°C covers cold storage dock doors and foundry perimeter guarding, though the upper end is tight near a heat source.