Magnetic sensors are devices that detect changes in magnetic fields. They are commonly used in various applications, such as in smartphones for compass functionality, in automotive systems for detecting wheel speed, and in industrial equipment for monitoring machinery. These sensors can measure the strength, direction, and changes in magnetic fields, providing valuable data for navigation and control systems. There are different types of magnetic sensors, including Hall effect sensors, magnetoresistive sensors, and fluxgate sensors. Each type operates on distinct principles and is suited for specific applications. Their ability to provide accurate measurements makes them essential in modern technology and engineering.