Photoelectric sensors, GR18, GRTB18S-P2317, Functional principle: Photoelectric proximity sensor, Functional principle detail: Background suppression, Switching output: PNP, Switching mode: Light switching, Connection type: Connector M12, 3-pin, Light source: PinPoint LED, Adjustment: Potentiometer, Communication interface: -, Included with delivery: Fastening nuts (2 x)