Small light barriers, W12, WTF12-3N1131, Device type: Light sensors and light barriers, Switching distance max.: 30 mm ... 175 mm, Sensor principle: Reflection light sensor, Detection principle: Foreground suppression, Switching output: NPN, Switching type: Light/dark switching, Connection type: Cable, 4-wire, 2 m, Light transmitter: LED, Light type: Visible red light, Setting: Potentiometer, Included in delivery: 2 x clamp holder BEF-KH-W12, incl. screws