A magnetic encoder is a device that converts the position or motion of an object into an electrical signal using magnetic fields. It typically consists of a rotating magnet and a sensor that detects changes in the magnetic field as the magnet moves. This information can be used to determine the angle or speed of rotation, making magnetic encoders useful in various applications, such as robotics and industrial automation. These encoders are known for their durability and resistance to environmental factors like dust and moisture. They are often preferred over optical encoders in situations where reliability is crucial. Magnetic encoders can be found in devices like electric motors and automated machinery.