SICK WS/WE18-3P430 Photoelectric Switch Sensor

The SICK WS/WE18-3P430 through-beam photoelectric switch sensor delivers long-distance object detection with a sensing range of up to 20 m, using a separate emitter and receiver pair and a PNP switching output. Powered from 10–30 V DC, it features a 645 nm visible red LED light source and a response time under 0.5 ms with up to 1000 Hz switching frequency, making it suitable for high-speed conveyor lines and automated production environments. The unit’s M12 4-pin connection, ABS housing, and IP67 protection support reliable operation in dusty, damp, and harsh industrial conditions, with operating temperatures from -40°C to +60°C and compact dimensions of approximately 17.6 × 75.5 × 33.5 mm. In practice, it’s used for precise detection in conveyance systems, pallet sensing, and packaging operations where long-range sensing and stable performance are required. The device supports light/dark switching, allowing integration in varying lighting environments, and is a common replacement choice for other SICK sensors in the WL18/WS/WE18 family, including WE18-3P430 and WS/WE170-P430 variants.