Its 270 mm protective height covers a 12-beam array at a 20 mm beam pitch, giving you a defined sensing zone for point-of-operation guarding. Operating range spans 0.3 m to 20.0 m, which covers most machine access openings without needing a separate long-range variant. Supply is 24 VDC, and the IP67 rating means it handles washdown environments — dust-tight and waterproof to the enclosure standard.
The 30 mm detection capability is the key fit parameter: it resolves a hand or arm (typically 30–40 mm diameter) but will not reliably detect a finger. If your application requires finger protection, you need a 14 mm detection model from the same F3SG-RE family. Protective height of 270 mm with 12 beams means the curtain covers a 270 mm vertical zone. For a taller opening, you stack multiple units or step up to a longer protective-height variant — the beam count scales with height in this series. Operating range of 0.3 m to 20.0 m is the sensing distance between emitter and receiver. The 0.3 m minimum is short enough for compact machines; the 20 m maximum handles long conveyor or gantry spans without a repeater.