Azbil Model FL7M DC 2-Wire Unshielded Cylindrical Proximity Sensors have a long sensing distance of 4mm to 20 mm depending on the size. The DC 2-wire no-polarity function reduces wiring costs. Prewired models are available in sizes (O.D.) M8, M12, M18, and M30. The setting indicator shows the stable sensing area. The proximity switch can be set up to detect objects reliably by bringing the switch progressively closer to the target object and installing the switch at the point where the indicator lamp (N.O. indication) changes from red to green. Cable length 2 m. Prewired 30 cm oil resistance flexible connector cables are available in size (O.D.) M8, M12, M18, and M30. Waterproof, sealed to IP67G.