Diffuse Reflective Sensors
The structure of diffuse reflective sensor is same as in reflective sensor , the emitter and receiver are placed in a single housing . But , it does not have reflector .The emitter emits a beam of light , which is directly reflected by a beam of object .The light incident on the object at any angle and it is diffused in all directions and some light is reflected back. When the object is detected within the reflective surface then the sensor acts accordingly . The presence of the object is determined by the intensity of the reflected light reaching the receiver . These are suitable applications where precise alignment of separate emitter and receiver units is not possible. The cost of diffuse reflective sensor is less than through beam sensor and reflective sensors. It must install at only one point .
Limitation : Suitable for detection of objects within limited range .Because depending on the object’s shape , size and color it might not reflect light very well back to the sensor’s receiver. This is less accurate than through beam and reflective sensors .
Photoelectric Sensor
A photoelectric sensor is a type of sensor used to detect the presence or absence of objects, as well as to measure distance, based on the principle of light reflection or interruption. It typically consists of a light transmitter and a receiver, which are positioned opposite each other with a gap between them.
Here in this article, we will discuss the definition of photoelectric sensors, the construction and working, various types, and the characteristics briefly. There are many advantages and applications of photoelectric sensors in day-to-day life. Let us discuss all those in this article.
Table of Content
- Photoelectric Sensor
- Components and Construction
- Types
- Characteristics
- Advantages
- Disadvantages
- Applications
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