Round light barriers, V180-2, VL180-2P42462, switching distance max.: 0.05 m ... 7 m, sensor principle: reflection light barrier, detection principle: double lens, switching output: PNP, switching type: light/dark switching, connection type: connector M12, 4-pin, light transmitter: LED, setting: potentiometer, included in delivery: reflector P250, fastening nut (2 x)