Gauss Meter / Portable Magnetic Field Strength Meters (Magnetometers)
Gauss meters are used to measure residual magnetism calibrated magnetic field strength meters of the type which contain a soft iron vane are commonly used. The vane aligns itself with the magnetic field, the strength and direction of the field is measured by the meter calibrated in gauss or tesla; similar non-calibrated instruments also exist.
Neither of these instruments should be brought into close contact with any strong magnetic fields as this may cause damage to the instrument.
Fig. 8.1 - Field strength meter.