Photoelectric sensors, W250-2, WL250-2R1531, Functional principle: Photoelectric retro-reflective sensor, Functional principle detail: With minimum distance to reflector (dual lens system), Switching output: Relay, Switching mode: Light switching, Connection type: Cable, 5-wire, 2 m, Light source: LED, Adjustment: Potentiometer, Communication interface: -, Included with delivery: Reflector P250, BEF-W250 mounting bracket