Proximity and Presence Sensors

A proximity sensor is a non-contact device that detects the presence of an item when it enters its sensory field. Depending on the type of proximity sensor, the sensor may detect a target via sound, light, infrared radiation (IR), or electromagnetic fields. A proximity sensor frequently generates an electromagnetic field or a beam of electromagnetic radiation to detect changes in the electromagnetic field or return signal.

There are several proximity sensors, and they all detect targets differently. The inductive proximity sensor and the capacitive sensor are the two types of proximity sensors most frequently utilized and commonly found in electrical switches and light switches. Due to the lack of mechanical components and physical contact between the sensor and the item being detected, proximity sensors are capable of great reliability and extended useful lives. Additionally, proximity and presence sensors are also found in electrical sockets, switches, and light switches.