The PANASONIC / SUNX CY-191B-Y is a reliable photoelectric sensor that operates in the retro-reflective dark ON mode. It is designed to detect objects within a range of 2 meters using NPN output. This sensor is an ideal choice for applications requiring accurate and efficient object detection, such as automation, robotics, and industrial control systems. Its compact design and high-performance capabilities make it a versatile solution for various industries.