The SICK WL12-3P2431 Photoelectric Sensor is a compact W12-3 retro-reflective device that detects targets up to 7 m away using a visible red LED. It carries the part number 1041436 and operates from a 10–30 V DC supply. The unit uses a 4-pin M12 connector and provides a PNP output with light/dark switching, adjustable via a 5-turn potentiometer. Based on the autocollimation retro-reflective principle, the emitter and receiver are integrated into a small rectangular housing, with a sensing range specified from 0 to 7 m for the red beam.
