SICK WT18-P610 Photoelectric Proximity Sensor

The SICK WT18-P610 is a compact, 3‑wire photoelectric proximity sensor from the WT18 family that uses background suppression to detect targets from 50 to 700 mm away with infrared light at 870 nm. Encased in a rectangular ABS housing measuring 17.6 mm wide by 75.5 mm high by 33.5 mm deep, it fits easily into tight spaces on automation equipment. The sensor emits a focused infrared beam (Ø 20 mm spot at 400 mm) and provides a PNP switching output rated up to 100 mA, with light/dark switching selectable and a 4‑turn potentiometer for precise sensitivity adjustment. It operates on supply voltages from 10 to 30 V DC and draws about 55 mA, ensuring reliable operation in standard industrial environments. The WT18-P610 is listed in SICK catalogs as WT18-3P610 (part no. 1025890), sharing the same optical and electrical characteristics as other WT18‑3P610 variants. This device is well-suited for integration into machine controls where quick, non-contact sensing of moving parts or workpieces is required, offering fast response and dependable performance in production lines where background suppression is advantageous.