
Sensors are the first step in achieving automatic detection and automatic control. The functions realized by sensors can be described by visual, auditory, sense of smell, and taste. In order to obtain information from the outside world, people must rely on sensory organs. Because people's own sensory organs alone, their function in the study of natural phenomena and laws and production activities is far from enough. To meet this situation, sensors are needed. Therefore, it can be said that the sensor is actually an electrical feature.
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