What is Photoelectric Sensor

Function

-         Sense visible light, IR, UV

-         By Photo bJT, photo diode, photo FET

-         Use to detect object by emit light to the object then capture the reflect light

Type

1. Through Beam
1. Not affected by the color of the object
2. High position detection, repeatability
3. Emitter & receiver are separated. 

2. Reflective
1. Suitable for transparent obj, semi trans, reflective obj
2. Not affected by background 

3. Diffuse
1. Affected by background, obj color
2. Easy to install

4. Limited reflective
1. Limited detectable zone only
2. Not affected by background after sensing zone.

Note

-         Through Beam sensor may face interference from other through beam sensor or other light source

-         Diffuse/reflect wont face these type of interference because they detect the light with their own clock