Miniature light barriers, W150, WL150-P420, switching distance max.: 0.01 m ... 0.7 m, sensor principle: reflection light barrier, detection principle: double lens, switching output: PNP, switching type: light/dark switching, connection type: connector M8, 4-pin, light transmitter: LED, setting: potentiometer, communication interface: -, included in delivery: mounting bracket BEF-W150-A, reflector PL20A