Photoelectric Sensors (Background Rejection, Tubular Style): Type - Photoelectric Diffuse Reflective Sensor; Sensing Range - 4" (100mm); Voltage - 10-30VDC; Output Mode - Light/Dark Operate; Output Type - NPN; Connection Type - Cable; Connection Size - 6.5ft (2m); Construction Style - Tubular, Threaded; Diameter - 18mm; Sensing Position - End; Material - Plastic; Response Time - 2.5ms; Beam Type - Infrared; Enclosure Rating IEC - IEC IP67; Temperature Rating - -25 to 55degC (-13 to 131degF)