The SICK WL4S-3P2230 is a retro-reflective photoelectric sensor from the W4S-3 family, delivering a 4 m sensing range with a red LED light source and a 500 µs response time. It operates on 10–30 VDC and switches PNP output, configurable for Light-ON or Dark-ON operation — useful when you need to invert the logic without swapping the sensor. The 15 mm wide, 22 mm tall, 45 mm deep housing keeps it compact for tight machine frames or conveyor side-mounts.
IP69K — survives daily CIP
Rated IP69K, this sensor withstands high-pressure, high-temperature washdown — the same cycle a dairy filler or brewery line runs every shift. The M8 4-pin connector and sealed optics mean no water ingress after repeated caustic blasts. For food-and-bev lines that demand daily CIP, this is the protection grade that keeps the sensor in service rather than on the replacement shelf.