How Do Proximity Sensors Work?
Proximity Sensor Basics A proximity sensor is a device which detects objects when they get within a certain distance from the sensor. The proximity sensor will then usually send a signal to an electronic circuit to perform a simple action, such as opening a door, turning on a light or sounding an alarm Many proximity circuits detect anything that comes too close. Others are designed to pick up on a particular type of object and ignore everything else. Proximity switches are devices which detect when an object is nearby. When an object gets within a certain distance, they will turn on a circuit to perform some basic function, such as opening a door or turning on a light or an alarm. Some proximity switches are designed to detect certain kinds of objects, while others will detect pretty much anything. Active Proximity Sensors Active proximity sensors actively hunt for an object. They typically send out some sort of signal and wait for it to be reflected back. By measuring the time betwee
