Photoelectric Sensors (Background Rejection, Tubular Style): Type - Photoelectric Retroreflective Sensor; Sensing Range - 21ft (6.5m); Voltage - 10-30VDC; Output Mode - Light Operate; Output Type - NPN; Connection Type - Cable; Connection Size - 6.5ft (2m); Construction Style - Tubular w/Flat Sides, Threaded; Diameter - 18mm; Sensing Position - End; Material - Polycarbonate; Response Time - 1ms; Beam Type - Visible Red; Enclosure Rating IEC - IEC IP67; Temperature Rating - -25 to 60degC (-13 to 140degF)