Proximity Sensors (Inductive, Tubular Style): Type - Photoelectric Retroreflective Sensor; Sensing Range - 21ft (6.5m); Voltage Range - 10-30VDC; Output Mode - Light/Dark Operate; Output Type - PNP; Connection Type - Cable; Connection Size - 6.5ft (2m); Construction - Tubular, Threaded; Diameter - 18mm; Sensing Position - End; Beam Type - Visible Red; Material - Body - Plastic; Enclosure Rating IEC - IEC IP67; Response Time - 8ms