Hall effect sensor

Figure 1: a wheel containing two magnets passing by a Hall effect sensor. The voltage from the sensor peaks twice for each revolution. This arrangement is used to measure and regulate the speed of rotating objects, including disk drives.

A Hall effect sensor (also known as a Hall sensor or Hall probe) is any sensor incorporating one or more Hall elements, each of which produces a voltage proportional to one axial component of the magnetic field vector B using the Hall effect (named for physicist Edwin Hall).

Hall sensors are used for proximity sensing, positioning, speed detection, and current sensing applications[1] and are common in industrial and consumer applications. Hundreds of millions of Hall sensor integrated circuits (ICs) are sold each year[2] by about 50 manufacturers, with the global market around a billion dollars.[3]

  1. ^ Ramsden, Edward (2006). Hall-effect sensors: theory and applications (2, illustrated ed.). Elsevier. ISBN 978-0-7506-7934-3.
  2. ^ "How the Hall Effect Still Reverberates - IEEE Spectrum". IEEE. Retrieved 2023-12-28.
  3. ^ "Global Industry Analysts: Global Hall-Effect Current Sensors Market to Reach $1.3 Billion by 2026". www.prnewswire.com. 2021-07-01. Retrieved 2023-12-28.