20.3.4—The use of a Hall probe to measure magnetic flux density

A Hall probe uses a known current and Hall coefficient so measured transverse voltage can be converted to magnetic flux density.

Keep probe face orientation, current and calibration fixed; reverse or zero the probe to identify offsets and field direction.

A probe calibrated at 20 mV T⁻¹ giving 6 mV indicates B=0.30 T under the stated operating current.

A Hall probe does not directly measure force or electric potential of the source; it infers B from carrier deflection.