Cutler-Hammer Perfect Prox® Photoelectric Sensor, 3-Wire 4-Wire, Series: Comet, Tubular, Back Ground Suppression Sensing Method, 4 in Sensing Range, Visible Red Sensing Beam, 1/3.5 ms Response, NPN/PNP Output, 10 to 30 VDC, 100/250 mA, 1 W, M12 Connector, LED Light Source, 30 gn, 2.06 in L x 0.47 in W x 0.71 in H, NEMA 1/3/4/4X/6/12/13/IP69K, -40 to 158 deg F Operating, Surface Mount