Small light barriers, W12G, max. switching distance: 0 m ... 4 m, sensor principle: reflection light barrier, detection principle: autocollimation, switching output: PNP, switching type: light/dark switching, connection type: connector M12, 4-pin, light transmitter: LED, setting: potentiometer, communication interface: -, included in delivery: 2 x clamp holder BEF-KH-W12, incl. screws