hall sensor

A Hall sensor is a transducer that converts changing magnetic fields into changes in output voltage. Hall sensors are primarily used for measuring magnetic fields, and can also measure physical quantities that generate and affect magnetic fields, such as those used in proximity switches, Hall sensors, position measurement, speed measurement, and current measurement devices< Its simplest form is that the sensor acts as an analog transducer and directly returns a voltage. Under a known magnetic field, its distance from the Hall disk can be set. By using multiple sets of sensors, the relevant position of the magnet can be inferred. The current passing through a conductor generates a magnetic field that varies with the current, and Hall effect sensors can measure the current without interfering with it. The typical construction is to integrate it with a winding magnetic core or a permanent magnet next to the measured conductor.