December 5, 2019

Hall voltage is discovered by Edwin Hall in 1879. Hall Effect is caused due to the nature of current in a conductor. Hall effect is the production of voltage across an electrical conductor, transverse to electric current in the conductor and to an magnetic field perpendicular to current. We all talk about the theory and definition of hall effect in our classes but we rarely talk or discuss about its application in our life.


Hall-effect sensors are the linear transducers that are used to measure the magnitude of the magnetic field. Working on the principle of Hall Effect, these sensors generate a Hall voltage when a magnetic field is detected, which is used to measure the magnetic flux density. Hall Effect sensors can be viewed as linear transducers. To process the sensor’s output these require a linear circuit that can provide a constant driving current to the sensors and also amplifies the output signal

Applications of Hall Effect Sensor

  • The applications of Hall-effect sensors are as follows:
  • These are used in ultra-high-reliability applications such as keyboards.
  • Hall Effect sensors are used to time the speed of wheels and shafts.
  • These are used to detect the position of permanent magnet in brushless electric DC motors.
  • Hall Effect sensors are embedded in digital electronic devices along with linear transducers.
  • Sensing the presence of the magnetic field in industrial applications.
  • Used in smartphone to check whether the flip cover accessory is closed.


Some of the examples for the application of Hall Effect sensors are the current transformers. Position sensing, Galaxy S4 Accessories, Keyboard switch, computers, Proximity sensing, speed detection, current sensing applications, tachometers, anti-lock braking systems magantometers. DC motors, disk drives etc…

Prepared ByRonish Prajapati, Moonlight Secondary School Kumaripati, Lalitpur.