Function overview:
Short-range sensors are also known as “proximity” sensors. Proximity sensors are actually a series of sensors used to detect the distance of objects, and their common feature is that they will not touch the object during the detection process. There are many types of proximity sensors, which work by emitting an electromagnetic field or light beam, and analyzing the changes in the reflected signal to determine the distance of the object being measured.
The farthest and nearest distance that the sensor can detect is called the “rated measurement range”. Some sensors can be adapted to different applications by adjusting the rated measuring range. It can be used as a touch switch if the rated measuring range is adjusted to a very short distance. Proximity sensors are characterized by high reliability and long service life because there is no physical contact between the sensor and the measured object, so there is no mechanical wear. There are many types of proximity sensors, and there are certain differences in use, such as capacitive sensors for detecting plastic objects, and inductive sensors for metal objects. The following are common proximity sensors:
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