Speed sensors are devices used to measure the speed of a moving object, often found in vehicles. They work by detecting the rotation of wheels or other components and converting this information into electrical signals. These signals are then sent to the vehicle's computer system, which uses them to monitor speed and adjust performance accordingly. There are different types of speed sensors, including magnetic and optical sensors. Magnetic sensors typically use a magnet and a coil to generate a signal, while optical sensors rely on light to detect movement. Both types play a crucial role in ensuring safe and efficient operation in various applications, from cars to industrial machinery.