Photoelectric switch is generated by pulse modulation by oscillating circuit. It is GL emitted by light emitting diode. When the measured object enters the range of light, the light pulse is reflected back to the phototransistor. In the receiving circuit, the optical pulse is a pulse signal, which is amplified and synchronized by selecting an amplifier. Then the interference is eliminated by using digital integral or reinforced concrete integral.
Photoelectric switches generally have good backlash characteristics, so even if the detected object is driven in a small range, it will not affect the output state, so it can be maintained in a stable working area. At the same time, the self-diagnosis system can also display the light state and stable working area to keep the photoelectric switch working.