Offered in 2- and 3-wire versions, Model M12/18/30 has 10-40 Vdc supply range and built-in reverse polarity, short-circuit, and transient voltage protection. Output is transistor type, with NPN and PNP versions available. Sensor has cable or M12 quick-disconnect plug and nickel-plated brass housing. Flush- and nonflush-mount sensing ranges for Model M12/18/30 are 4 and 8 mm, 8 and 14 mm, and 15 and 22 mm respectively.