HG-18-50N3, NPN NO+NC, detection distance 80cm-500cm/3.15in-19.7in The laser photoelectric switch is a kind of photoelectric switch using the principle of laser, which detects the position and distance of the object through the detection of the laser beam. A laser photoelectric switch usually consists of a laser, a lens and a receiver. The laser emits a laser beam, which is focused by the lens and irradiates the receiver. When the laser beam is blocked by an object, the signal strength received by the receiver changes, and the trigger circuit sends out a signal or controls the circuit. Compared with traditional photoelectric switches, laser photoelectric switches have higher detection accuracy and sensitivity, and can detect very small object movement and occlusion. At the same time, the laser photoelectric switch also has higher reliability and stability, and can work normally in harsh environments. Laser photoelectric switches are widely used in robots, industrial automation equipment, automobile manufacturing, aerospace and other fields to detect the position, distance and motion state of objects