Linear displacement sensors are devices used to measure the position or movement of an object along a straight line. They convert the physical displacement into an electrical signal, which can be easily read and interpreted. Common types include potentiometers, linear variable differential transformers (LVDTs), and optical encoders. These sensors are widely used in various applications, such as industrial automation, robotics, and automotive systems. They help ensure precise control and monitoring of movements, making them essential for tasks that require accuracy, such as measuring the position of a machine part or the extension of a hydraulic cylinder.