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; Construction Style - Tubular, Threaded; Sensing Position - End; Material - Plastic; Response Time - 2.5ms; Beam Type - Infrared; Enclosure Rating IEC - IEC IP69K; Temperature Rating - -40 to 70degC (-40 to 158degF)