A torque sensor is a device used to measure the torque or rotational force applied to an object, such as a shaft or a motor. It converts the mechanical energy of the torque into an electrical signal, which can then be analyzed or displayed. These sensors are commonly used in various applications, including automotive testing, industrial machinery, and robotics. Torque sensors come in different types, including strain gauge, magnetostrictive, and optical sensors. They play a crucial role in ensuring the proper functioning of systems by providing real-time data on torque levels, which helps in monitoring performance and preventing mechanical failures in equipment like engines and gearboxes.