Potentiometric position sensor use resistive effect as the sensing principle

Rotary position sensor angle sensor use resistive effect as the sensing principle. The sensing element is simply a resistive (or conductive) track. A wiper is attached to the body or part of the body whose displacement is to be measured. The wiper is in contact with the track. As the wiper(with the body or its part) moves, the resistance between one end of the track and the wiper changes. Thus, the resistance becomes a function of the wiper position. The change in resistance per unit change in wiper position is linear.In a similar fashion, the sensor used for measurement of position is called positioning sensors.