Proximity Sensor, 4-Wire DC Extended Range Complementary Output, 30mm Diameter, Tubular:Nickel Plated BrassRectangular, Standard, 20mm Sensing Distance, Unshielded, Complementary N.O. & N.C., PNP, PVC Cable
Reference : 872C-N20BP30-E2
30 mm Barrel Inductive Prox Sensor