Proximity and Touch Sensors

A proximity sensor is a sensor able to detect the nearness of adjacent particles with no physical contact. A proximity sensor often discharges an electromagnetic field or a light emission radiation (infrared, for example), and searches for changes in the field or return signal. The object being detected is often referred to as the proximity sensor's target. A touch sensor is a kind of hardware that captures and records physical touch or grasp on a device and/or object.