The Panasonic PM-T65 Photoelectric Sensor Small Type Light ON/Dark ON NPN Open Collector 0.006m is a small type photoelectric sensor with an open collector NPN output. The sensor features light-on or dark-on operation that requires external power supplied from an AC or DC source. It is designed for use in a wide range of applications, including detecting the presence of targets, controlling conveyors, and monitoring production lines. The PM-T65's small diameter of 4.2mm allows it to be installed in tight spaces, such as those found in the electronics industry. The PM-T65 also offers a long sensing range of up to 0.006m and excellent noise immunity.