Photoelectric Sensors (Background Rejection, Tubular Style): Type - Photoelectric Retroreflective Sensor; Sensing Range - 157.48" (4000mm); Voltage - 10-30VDC; Output Mode - Light/Dark Operate; Output Type - NPN; Connection Type - Connector, 4-pin Micro DC; Connection Size - M12x1; Construction Style - Tubular, Threaded; Diameter - 18mm; Sensing Position - End; Material - Polybutylene Terephthalate; Response Time - 1ms; Beam Type - Infrared; Enclosure Rating IEC - IEC IP67; Temperature Rating - -25 to 55degC (-13 to 131degF)