Classification and working mode of photoelectric sensors

Classification and working methods

⑴ Slot type photoelectric sensor

Install a light emitter and a receiver face-to-face on both sides of a slot to form a slot shaped photoelectric device. The emitter can emit infrared or visible light, and the light receiver can receive light without obstruction. But when the detected object passes through the slot, the light is blocked, and the photoelectric switch operates, outputting a switch control signal to cut off or turn on the load current, thus completing a control action. The detection distance of slot switches is generally only a few centimeters due to the limitations of the overall structure.