Hall effect sensor


Hall effect sensor

A Hall effect sensor is a transducer that varies its output voltage in response to changes in magnetic field. Hall sensors are used for proximity switching, positioning, speed detection, and current sensing applications.

In its simplest form, the sensor operates as an analogue transducer, directly returning a voltage. With a known magnetic field, its distance from the Hall plate can be determined. Using groups of sensors, the relative position of the magnet can be deduced.

Electricity carried through a conductor will produce a magnetic field that varies with current, and a Hall sensor can be used to measure the current without interrupting the circuit. Typically, the sensor is integrated with a wound core or permanent magnet that surrounds the conductor to be measured.

Frequently, a Hall sensor is combined with circuitry that allows the device to act in a digital (on/off) mode, and may be called a switch in this configuration. Commonly seen in industrial applications such as the pictured pneumatic cylinder, they are also used in consumer equipment; for example some computer printers use them to detect missing paper and open covers. When high reliability is required, they are used in keyboards.

Hall sensors are commonly used to time the speed of wheels and shafts, such as for internal combustion engine ignition timing or tachometers. They are used in brushless DC electric motors to detect the position of the permanent magnet. In the pictured wheel carrying two equally spaced magnets, the voltage from the sensor will peak twice for each revolution. This arrangement is commonly used to regulate the speed of disc drives.

See also

* Hall effect
* List of sensors


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  • Hall-effect sensor — Hallo jutiklis statusas T sritis automatika atitikmenys: angl. Hall effect sensor; Hall sensor; Hall transducer vok. Hall Geber, m; Hall Sensor, m; Hall Wandler, m rus. датчик Холла, m pranc. capteur de Hall, m; senseur de Hall, f ryšiai:… …   Automatikos terminų žodynas

  • Hall-effect sensor — Holo jutiklis statusas T sritis Standartizacija ir metrologija apibrėžtis Jutiklis, kurio veikimas pagrįstas Holo reiškiniu. atitikmenys: angl. Hall generator; Hall unit; Hall effect sensor vok. Hall Generator, m; Hall Sensor, m rus. датчик Холла …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • Hall-effect sensor — Holo jutiklis statusas T sritis fizika atitikmenys: angl. Hall effect sensor vok. Hall Sensor, m rus. датчик Холла, m pranc. capteur de force électromotrice de Hall, m …   Fizikos terminų žodynas

  • Hall-effect sensor — A hall generator …   Dictionary of automotive terms

  • Hall effect — For the Colombian band, see The Hall Effect (band). The Hall effect is the production of a voltage difference (the Hall voltage) across an electrical conductor, transverse to an electric current in the conductor and a magnetic field perpendicular …   Wikipedia

  • sensor — [1] An electronic detection device that receives and reacts to a signal, such as a change in voltage, temperature or pressure. [2] Material or device which goes through physical change or electronic characteristic change as surrounding conditions …   Dictionary of automotive terms

  • Hall-Sensor — Hallo jutiklis statusas T sritis automatika atitikmenys: angl. Hall effect sensor; Hall sensor; Hall transducer vok. Hall Geber, m; Hall Sensor, m; Hall Wandler, m rus. датчик Холла, m pranc. capteur de Hall, m; senseur de Hall, f ryšiai:… …   Automatikos terminų žodynas

  • Hall-sensor — Hallo jutiklis statusas T sritis automatika atitikmenys: angl. Hall effect sensor; Hall sensor; Hall transducer vok. Hall Geber, m; Hall Sensor, m; Hall Wandler, m rus. датчик Холла, m pranc. capteur de Hall, m; senseur de Hall, f ryšiai:… …   Automatikos terminų žodynas

  • Hall-Geber — Hallo jutiklis statusas T sritis automatika atitikmenys: angl. Hall effect sensor; Hall sensor; Hall transducer vok. Hall Geber, m; Hall Sensor, m; Hall Wandler, m rus. датчик Холла, m pranc. capteur de Hall, m; senseur de Hall, f ryšiai:… …   Automatikos terminų žodynas

  • Hall-Wandler — Hallo jutiklis statusas T sritis automatika atitikmenys: angl. Hall effect sensor; Hall sensor; Hall transducer vok. Hall Geber, m; Hall Sensor, m; Hall Wandler, m rus. датчик Холла, m pranc. capteur de Hall, m; senseur de Hall, f ryšiai:… …   Automatikos terminų žodynas