Maker's Name:
Griffin
Where made:
England
Dimensions:
30 × 16 × 49.5 cm
The double metal hook holds in suspension either a compass needle or a magnet.
The suspension filament resists the turning torque, when the suspended magnet tries to align with a local magnetic field.
The angle of twist gives a measure of the strength of the magnetic field.
A more sensitive measure of a magnetic field is possible with a fluxgate magnetometer.
