The photoelectric switch sensor uses light beams such as near infrared and infrared to detect and distinguish objects. The weak light beams instantly emitted by the photoelectric device can be safely, reliably and accurately emitted and received. Light is an electromagnetic wave with a transmission speed of about 300,000 kilometers per second. It is received by it at the moment of transmission, which makes the photoelectric switch sensor respond quickly.

The photoelectric switch sensor can be divided into through-beam type, diffuse reflection type and specular reflection type:
Opposite type:
The through-beam photoelectric switch sensor is composed of a transmitter and a receiver. The two are separated in structure. When the beam is interrupted, a switch signal change will occur. The typical way is that the photoelectric switches located on the same axis can be mutually connected. Separate up to 50 meters. feature:
1. Identify opaque reflective objects;
2. The effective distance is large, because the light beam crosses the sensing distance only once;
3. It is not susceptible to interference and can be used reliably and appropriately in the wild or in a dusty environment;
4. The equipment consumes high, and cables must be laid for both units.
Diffuse reflection type:
The diffuse reflection type photoelectric switch sensor is when the switch emits light, the target produces diffuse reflection. The transmitter and receiver constitute a single standard component. When enough combined light returns to the receiver, the switch state changes and the typical value of the operating distance Up to 3 meters. feature:
1. The effective range is determined by the reflection ability of the target, and by the nature and color of the target surface;
2. Smaller assembly expenditure, when the switch is composed of a single component, coarse positioning can usually be achieved;
3. Use the background suppression function to adjust the measurement distance;
4. Sensitive to dust on the target and sensitive to the changed reflection performance of the target.
Specular reflection type:
The specular reflection type photoelectric switch sensor is a standard configuration when it is composed of a transmitter and a receiver. The light beam from the transmitter is reflected on the opposite mirror, that is, it returns to the receiver. When the light beam is interrupted, a switch signal will be generated. The change. The light passing time is twice the signal duration, and the effective range is from 0.1m to 20m. feature:
1. Identify opaque objects;
2. With the help of mirror components, a high effective distance range is formed;
3. It is not susceptible to interference and can be used reliably and appropriately in the wild or dusty environment.