What it is and what the ratings mean for fit
This is an Omron F3SJ-B1985P25 safety light curtain from the F3SJ-B series, packaged in bulk. It's a through-beam photoelectric guard rated for hand protection with a 25mm detection capability — that's the smallest object it reliably catches, so it's sized for finger and hand access into a hazard zone, not just presence detection. The 20mm beam pitch and 98 beams give it a 1985mm protective height, which covers a full-body reach zone on a machine opening. Operating range runs from 0.2m to 7.0m — that's close-in guarding for a small press up to a wider conveyor entry. Supply is 24VDC, and it's rated IP65, so the housing and optics handle washdown from hoses and dust in a factory environment. Temperature range is -10°C to 55°C; fine for most indoor production floors, but if it's going near an oven or freezer door, watch the ambient. Built-in blanking and muting functions mean you can configure it to ignore fixed obstructions (like a part fixture) or automatically bypass during a pallet pass-through — saves adding external bypass relays or a separate safety controller for simple stations.