The WL12-3P2431 is a miniaturized retro-reflective photoelectric sensor featuring autocollimation (“no reflector required” minimum distance). It emits a visible red LED and offers reliable detection up to 5 m with a reflector, extendable to 7 m maximum. Equipped with a PNP light/dark switching output, fast response, and durable housing with IP66/67/69K protection, it’s designed for tough industrial environments.