Small light barriers, W12, WL12-3P2431T01, Device type: Light sensors and light barriers, Switching distance max.: 0 m ... 7 m, Sensor principle: Reflection light barrier, Detection principle: Autocollimation, Switching output: PNP, Switching type: Light/dark switching, Connection type: M12 connector, 4-pin, Light transmitter: LED, Light type: Visible red light, Adjustment: Potentiometer, Special features: Teflon-coated housing