What this light curtain delivers for the line
The F3SG-4SRB1600-25 is a through-beam safety light curtain from Omron's F3SG-SR series, built for hand protection with a 25 mm detection capability. That 25 mm figure means it catches a finger or hand reaching into the hazard zone — it's the standard for point-of-operation guarding where you need to stop the machine before someone gets pinched. The 1600 mm protective height and 80 beams at 20 mm pitch cover a tall opening, like a press or a large assembly station. Operating range runs from 0.3 m out to 20 m, so it handles both tight machine guarding and longer perimeter setups on the same unit. Power it with 24 VDC, standard for control panels. The IP65/IP67/IP67G rating means the housing and optics handle washdown — the 'G' suffix indicates oil resistance, so it survives on a machining line where coolant mist and cutting oil are in the air. That matters out here in the grease; I've seen standard IP67 curtains fog up after six months on a transfer line. This one should hold up. Built-in blanking and muting functions let you ignore fixed obstructions (like a fixture arm) or temporarily bypass the curtain for a workpiece pass without a separate controller. That's a panel-space saver and one less box to wire.
The 25 mm detection capability is the deciding spec for hand protection per IEC 61496. A 14 mm curtain catches fingers; 25 mm catches hands. If your risk assessment calls for finger protection, step down to the 14 mm variant in the same F3SG-SR family. The 1600 mm height and 20 m range give you flexibility — it can guard a tall robot cell or a long conveyor infeed without stacking multiple units. Operating temperature from -30°C to 55°C covers unheated warehouses and outdoor gantries.
Through-beam design means you mount the emitter and receiver facing each other, aligned within the beam pitch tolerance. The 20 mm beam pitch and 80 beams require stable mounting to avoid misalignment over the 1600 mm span. Use the Omron alignment tool or a laser pointer at the top and bottom brackets. The IP67G spec holds up to direct washdown, so you can hose it off on a food line without pulling the covers.