The F3SG-4SRA0720-25 is an Omron F3SG-SR safety light curtain rated for hand protection with a 25 mm detection capability. That 25 mm figure means it catches fingers reaching into the hazard zone — finger-protection class per IEC 61496-1 — so it suits applications where operator access to pinch points or guillotines must be interrupted before contact. The 720 mm protective height covers a typical waist-to-shoulder zone on a standing operator; with 36 beams at 20 mm pitch, the curtain resolves a 25 mm object anywhere in the field. Operating range spans 0.3 m to 20.0 m, which covers most machine guarding distances from compact assembly stations to long conveyor infeed zones. Supply is 24 VDC, standard for safety-relay and safety-PLC inputs. The IP65/IP67/IP67G ingress rating means the sensor body and optics withstand washdown — suitable for food-and-bev lines or machining coolant environments where oil resistance is required.
What the ratings mean for fit
The 25 mm detection capability and 20 mm beam pitch define the smallest object the curtain sees — a 25 mm diameter rod anywhere in the field triggers the output. Hand protection (per IEC 61496-1) is the intended safety level; this is not a finger-protection (14 mm) or body-detection (50 mm+) curtain, so match it to applications where the hazard requires hand-level resolution. The 720 mm protective height and 20 m range give the mounting envelope: the emitter and receiver columns must be aligned within that range, and the guarded zone height is exactly 720 mm. Blanking and muting functions (listed features) allow fixed or floating object suppression and temporary bypass during material feed — useful on palletising cells or press lines where a workpiece must pass through the field without stopping the machine.