Miniature light barriers, W100-2, WT100-2P4439, switching distance max.: 0 mm ... 1,200 mm, sensor principle: reflection light sensor, detection principle: energetic, switching output: PNP, switching type: light/dark switching, connection type: connector M8, 4-pin, light transmitter: LED, setting: potentiometer, included in delivery: mounting bracket BEF-W100-A