Small light barriers, W12, WTB12-3P1711, Device type: Light sensors and light barriers, Switching distance max.: 20 mm ... 600 mm, Sensor principle: Reflection light sensor, Detection principle: Background suppression, Switching output: PNP, Switching type: Light/dark switching, Connection type: Cable, 4-wire, 3 m, Light transmitter: LED, Light type: Infrared light, Adjustment: Potentiometer, Included in delivery: 2 x clamp holder BEF-KH-W12, incl. screws