Photoelectric Sensors (Background Rejection, Tubular Style): Type - Photoelectric Retroreflective Sensor; Sensing Range - 21ft (6.4m); Voltage - 20-250VAC/DC; Output Mode - Light Operate; Output Type - MOSFET; Connection Type - Cable; Connection Size - 6.5ft (2m); Construction Style - Tubular, Threaded; Diameter - 18mm; Sensing Position - End; Material - Polycarbonate; Response Time - 10ms; Beam Type - Visible Red; Enclosure Rating IEC - IEC IP67; Temperature Rating - -20 to 60degC (-4 to 140degF)