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A rectangle with a capital H and four terminals.
Also known as: Hall sensor, Hall element, Magnetic field sensor, Box marked H
A Hall sensor produces a voltage across a current-carrying plate when a magnetic field is applied perpendicular to it, so it measures magnetic field with no moving parts and works down to zero frequency — which a coil cannot do.
Denotes a Hall effect sensor: a device producing a voltage proportional to a magnetic field perpendicular to a current-carrying element.
Contexts: Electrical equipment
Responds to steady fields as well as changing ones, unlike an inductive pickup, which is why it is used for position sensing at zero speed.
Contexts: Electrical equipment
Is the standard sensor for brushless motor commutation and for contactless current measurement.
Contexts: Electrical equipment
A rectangle bearing a capital letter H, with two current terminals on opposite edges and two voltage terminals on the other pair.