Hall magnetometers are sensitive to temperature, so they may include a temperature sensor that allows the instrument to compensate the measurement.
The SI unit for magnetic flux density (B).
The magnetic field is a three-dimensional vector quantity. A single Hall element only measures one component. A three-axis Hall instrument has three Hall elements arranged to measure all three components.
Once the resonance has been found (see Search), a continuous-wave NMR teslameter can lock onto a signal and continue measuring it, even though the field is slowly changing. This is called tracking.
NMR teslameter probes usually have a capacitor placed in parallel with the RF coil, forming an LC resonator that increases the gain and therefore the sensitivity of the probe. Probes can employ fixed tuning, with a fixed capacitor / trimcap, or variable tuning, using an electronically controlled varicap.