A position sensor is a device that detects the movement or displacement of an object and converts it into an electrical signal that can be measured or monitored. These sensors determine the exact position, distance, or angle of an object relative to a reference point.

They work on different principles such as resistive (potentiometric), inductive, capacitive, optical, or magnetic sensing. For example, a linear position sensor measures straight-line motion, while a rotary position sensor detects angular movement. They are widely used in automation, robotics, CNC machines, automobiles, elevators, and industrial equipment to provide feedback for accurate control of motion. Position sensors are valued for their high precision, reliability, and ability to operate in harsh conditions, making them essential in both research and industrial applications.