The Omron F3SG-4SRB0640-25 is a Type 4 safety light curtain from the F3SG-SR series, designed for hand protection with a 25 mm detection capability and a 640 mm protective height. It uses 32 beams at a 20 mm pitch, covering an operating range from 0.3 m to 20 m. Supply is 24 VDC, and the housing carries an IP65/IP67/IP67G rating — dust-tight, waterproof, and oil-resistant, which matters when washdown or coolant mist is part of the environment.
The 25 mm detection capability is the key figure for hand protection — it catches a 25 mm diameter object anywhere in the field, which meets the typical requirement for finger or hand detection per IEC 61496. The 640 mm protective height defines the guarded zone; if your opening or hazard area is taller, you stack multiple units or step up to a longer model in the same series. The 20 mm beam pitch and 32 beams give you a dense curtain that minimizes blind spots near the edges. Operating range of 0.3 m to 20 m covers most machine guarding distances — close-in for small presses, out to 20 m for long conveyor or gantry perimeters. The IP65/IP67/IP67G rating means it handles hose-down cleaning (IP67) and oil exposure (IP67G), so it fits food processing, machining centers, and automotive lines where washdown is routine. Blanking and muting functions are built in — blanking lets you ignore fixed obstructions (like a fixture post) in the field, while muting temporarily suspends the curtain during a material pass. That saves adding external bypass logic or a second safety controller for simple material-handling cells.