Position sensor

A position sensor is a sensor that detects an object's position. A position sensor may indicate the absolute position of the object (its location) or its relative position (displacement) in terms of linear travel, rotational angle or three-dimensional space. Common types of position sensors include the following:

* Capacitive displacement sensor
* Eddy-current sensor
* Hall effect sensor
* Inductive sensor
* Laser Doppler vibrometer (optical)
* Linear variable differential transformer (LVDT)
* Photodiode array
* Piezo-electric transducer (piezo-electric)
* Position encoders:
* Absolute encoder
* Incremental encoder
* Linear encoder
* Rotary encoder
* Potentiometer
* Proximity sensor (optical)
* String potentiometer (also known as a string potentiometer, string encoder or cable position transducer)
* Ultrasonic sensor

## See also

* List of length, distance, or range measuring devices
* Positioning system

## Literature

* David S. Nyce: Linear Position Sensors: Theory and Application, New Jersey, John Wiley & Sons Inc. (2004)

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