Small light barriers, G10, GL10G-P4251, switching distance max.: 0.15 m ... 12 m, 0.15 m ... 10 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: PinPoint LED, setting: potentiometer, communication interface: -