The Omron F3SG-4SRA0840-25-F is a Type 4 safety light curtain from the F3SG-SR series, built for hand detection with a 25 mm detection capability. Its 840 mm protective height and 42 beams at 20 mm pitch cover a reach-through zone for point-of-operation safeguarding. Rated IP65/IP67/IP67G, the housing and optics withstand washdown environments — the IP67G rating adds oil resistance, which matters on machining lines where coolant mist is present. Operating range spans 0.3 m to 20.0 m, giving flexibility from tight machine guarding to longer perimeter setups. Supply is 24 VDC, standard for safety circuits. Temperature range is -30°C to 55°C, so it handles unheated warehouse staging areas or refrigerated processing.
What the ratings mean for fit
The 25 mm detection capability means a finger or hand reaching into the hazard zone is caught before it reaches the danger point — this is finger-protection class per IEC 61496-1, not just presence detection. For a press brake or assembly station where operators reach into the light plane, that resolution is the deciding spec. Blanking and muting functions are built in, so the curtain can ignore fixed obstructions (blanking) or temporarily suspend safeguarding during a material pass-through (muting). That saves an external safety controller for simple sequenced cells.
Sourcing and lifecycle
For a BOM freeze or a line-down replacement, the active status means no last-time-buy pressure. The part is quoted to order against an RFQ; lead time and pricing depend on quantity and current factory backlog.