1. Diffuse reflection photoelectric switch

The diffuse reflection photoelectric switch is a sensor that integrates a transmitter and a receiver. When an object to be detected passes by, the sufficient amount of light emitted by the photoelectric switch transmitter is reflected back to the receiver, and thus the photoelectric switch generates a switch signal. When the surface of the object being inspected is bright or its reflectivity is extremely high, the diffuse reflection photoelectric switch is the preferred detection mode.

2. Mirror reflection type photoelectric switch

The mirror reflection type photoelectric switch is also an integrated transmitter and receiver. The light emitted by the photoelectric switch transmitter passes through the mirror and is reflected back to the receiver. When the object to be detected passes by and completely blocks the light, the photoelectric switch generates a detection switch signal.

3. Through-beam photoelectric switch

The through-beam photoelectric switch consists of a transmitter and a receiver that are structurally separated and have their optical axes placed opposite each other. The light emitted by the transmitter directly enters the receiver. When the object to be detected passes between the transmitter and the receiver and blocks the light, the photoelectric switch generates a switch signal. When the object to be detected is opaque, the through-beam photoelectric switch is the most reliable detection mode.

4. Trough-type photoelectric switch

The trough-type photoelectric switch is usually of a standard U-shaped structure. Its transmitter and receiver are respectively located on both sides of the U-shaped groove and form an optical axis. When the object to be detected passes through the U-shaped groove and blocks the optical axis, the photoelectric switch generates the detected switch signal. Trough-type photoelectric switches are relatively safe and reliable, suitable for detecting high-speed changes and distinguishing between transparent and semi-transparent objects.

5. Fiber optic photoelectric switch

Fiber optic photoelectric switches use plastic or glass fiber optic sensors to guide light, enabling the detection of objects not being in nearby areas. Generally, optical fiber sensors are divided into through-beam type and diffuse reflection type.