brief introduction： :A proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact. A proximity sensor often emits an electromagnetic field or a beam of electromagnetic radiation (infrared, for instance), and looks for changes in the field or return signal. The object being sensed is often referred to as the proximity sensor's target. Addition of charge coupling or change to the effective dielectric of the existing capacitance creates a change that can be detecte

Proximity Sensors

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