Economy Sensor M12, M18 Flush-mountable 3-cable, PNP, N/O Operating voltage 10 → 30 V DC Short-circuit proof and reverse polarity proof Protection class IP67 Protection class 2 Continuous screw thread Automotive approved Balluff part no. Housing Plug connection Housing length Switching distance BES M12MI-PSC20B-S04G M12 x 1 M12 56 mm 2 mm BES M18MI-PSC50B-S04G M18 x 1 M12 56 mm 5 mm