The PFM 12 mm and PFK 18 mm proximity series are sensors with shielded or unshielded stainless steel housings and M12 quick-disconnect plug with gold-plated pins. Providing complete overload protection, each series has 10 models available. The PFM series has a standard sensing distance of up to 4 mm and extended distance of up to 8 mm. The PFK series has a standard sensing distance of up to 8 mm and extended distance of up to 12 mm. Models are available in a choice of 10-30 VDC PNP or NPN transistor outputs and normally open or complementary output configurations.