Photoelectric Sensors (Background Rejection, Tubular Style): Type - Inductive Proximity, Ferrous Metal Only Sensor; Sensing Range - 8 mm; Voltage - 10-30V DC; Wires - Voltage Type - 3-Wire DC; Shielding - Shielded; Output Mode - N.O. (NPN); Connection Type - Connector, 4-pin; Connection Size - M12x1; Construction Style - Tubular, Threaded; Diameter - 30 mm Dia.; Material - Stainless Steel; Enclosure Rating IEC - IEC IP67/IP68/IP69K; Switching Frequency - 10 Hz; Load Current - max - 200 mA; Temperature Rating - -40 deg C (-40 deg F) to F470 deg C (158 deg F); Material - Face - Stainless Steel