The Omron F3SG-4SRA0680-25-F is a safety light curtain from the F3SG-SR series, designed for hand protection with a 25 mm detection capability. Its 20 mm beam pitch across 34 beams gives a 680 mm protective height, covering access openings on machinery where a hand-sized object must be detected before it reaches a hazard. Operating range spans 0.3 m to 20.0 m, which suits both tight guarding near the point of operation and wider perimeter setups. The 24 VDC supply is standard for safety circuits, and the IP65/IP67/IP67G rating means the housing is dust-tight, water-resistant, and waterproof — rated for washdown environments including oil exposure.
Key ratings and what they mean for fit
The 25 mm detection capability is the critical spec: it determines that the curtain will reliably interrupt the safety circuit when a 25 mm diameter object (or larger) breaks any beam. That makes it suitable for hand and finger protection zones, not just body detection. The 20 mm beam pitch is the spacing between adjacent beams — tighter pitch means smaller gaps between beams, reducing the chance of a hand slipping through undetected. Protective height of 680 mm defines the vertical area the curtain monitors. If the hazard zone is taller, multiple units stack. The 34 beams at 20 mm pitch produce that height — a quick check against the machine opening dimension confirms whether one unit covers the zone or two are needed. Temperature range of -30°C to 55°C covers most indoor industrial environments, including unheated warehouses or cold storage areas. The IP65/IP67/IP67G ingress protection is a triple rating: IP65 for dust and low-pressure water jets, IP67 for temporary immersion, and IP67G adding oil resistance — important for machining centers or food processing lines where coolant or washdown is routine.
Built-in functions: blanking and muting
Blanking allows the curtain to ignore a fixed obstruction (like a work fixture or conveyor section) within the protective field, while still monitoring the rest of the zone. Muting temporarily suspends the safety output when a workpiece enters the field under controlled conditions — used in automated material handling where a part passes through the curtain without triggering a stop. Both functions are onboard, so no external controller is needed for these common applications.