Photoeye sensor uses the object to be tested to block or reflect the light beam, and the synchronization circuit selects the circuit to detect the presence of the blocked object. All objects that reflect light can be detected. The Photoeye sensor converts the input current into a light signal on the transmitter and emits it. The receiver will then detect the target object based on the intensity or presence of the received light. Most Photoeye sensors use infrared, which has a wavelength close to visible light.

Precautions for the use of Photoeye sensor:
(1) The infrared sensor is a diffuse reflection type product, and the standard detection body is flat white paper.
(2) Infrared Photoeye sensor can work stably under high ambient illuminance, but in principle, the optical axis of the sensor should be avoided as far as possible from strong light sources such as sunlight.
(3) The detectable width of the Photoeye sensor is 80% of the lens width of the Photoeye sensor.
(4) When using an inductive load, the transient impulse current is large, which may damage the AC two-wire Photoeye sensor. In this case, the load should be converted to use through an AC relay. (5) The infrared Photoeye sensor lens can be used to wipe lens paper, but it is strictly forbidden to use chemicals such as dilution solvents to avoid damage to the plastic lens.
(6) When using and replacing the Photoeye sensor, confirm the voltage level and ensure that the wiring is correct to avoid accidents.
(7) When using the Photoeye sensor, try to avoid places with a lot of dust, corrosive gas, excessive environmental temperature change, vibration and shock, and no shock absorption measures.