The Omron F3SG-4SRA1680-25 is a type-4 safety light curtain from the F3SG-SR series, built for hand protection with a 25 mm detection capability. That 25 mm finger-and-hand resolution means it catches a hand or fingers reaching into a hazard zone before the machine can cause injury — it's the spec that decides whether this curtain fits your risk assessment. The 1680 mm protective height covers a tall opening, and the 20 mm beam pitch with 84 beams gives you a dense detection field from 0.3 m out to 20 m, so it works on long-reach press brakes or large assembly stations.
Runs on 24 VDC, which is standard for safety circuits in just about any control panel. The IP65/IP67/IP67G ingress rating is the real story here — it's dust-tight, water-resistant, and oil-resistant, plus the IP67G rating means it stands up to high-pressure washdown. Out here in the grease, that's what keeps a light curtain alive when the coolant spray or wash hose hits it. Built-in blanking and muting functions let you ignore fixed obstructions (like a part in the beam) or temporarily bypass the curtain during a material feed cycle without disabling the safety system. That's a practical feature for automated lines where you need safe access but can't stop the machine every cycle.