Photoelectric sensors, W250-2, WTB250-2P2451, Functional principle: Photoelectric proximity sensor, Functional principle detail: Background suppression, Switching output: PNP, Switching mode: Light/dark switching, Connection type: Male connector M12, 4-pin, Light source: LED, Adjustment: Potentiometer, Communication interface: -, Included with delivery: BEF-W250 mounting bracket