The through-beam photoelectric switch is an infrared induction photoelectric product, which is composed of an infrared emitting tube and an infrared receiving tube, and the groove width determines the intensity of the induction receiving type and the distance between the received signals. The infrared light between the body and the photoreceptor is received and converted to detect the position of the object.Limited by the detection body, the detection accuracy is high, and it can detect small objects. It is often used in coin machines, small household appliances, fax machines, etc. and has a wide range of applications.