The quality photoelectric switch sensor is a kind of sensor. The photoelectric switch sensor converts the change of light intensity between the transmitting end and the receiving end into the change of current to achieve the purpose of detection. The quality photoelectric switch sensor utilizes the shielding or reflection of the light beam by the detected object, and the circuit is turned on by the synchronous circuit to detect the presence or absence of the object.

The quality photoelectric switch sensor are generally composed of three parts, which are divided into: transmitter, receiver and detection circuit. The whole working process of the photoelectric switch sensor is to first convert the input current into a light signal on the transmitter , and then the receiver on the photoelectric switch sensor detects the target object according to the intensity or presence of light of the received light.

The quality photoelectric switch sensor are controlled by converting changes in light intensity into changes in electrical signals. The objects detected by the photoelectric switch sensor are not limited to metals, and all objects that can reflect light (or block light) can be detected. The quality photoelectric switch sensor can also adjust the position of the detected object.