Magnetometers are used in geophysical surveys to find deposits of iron because they can measure the magnetic field variations caused by the deposits. Magnetometers are also used to detect shipwrecks and other buried or submerged objects.

Why do we use magnetometer?

Magnetometers are widely used for measuring the Earth's magnetic field, in geophysical surveys, to detect magnetic anomalies of various types, and to determine the dipole moment of magnetic materials. In an aircraft's attitude and heading reference system, they are commonly used as a heading reference.

How do magnetometer sensors work?

Based on the principle of Faraday's laws of induction, these magnetometers comprise copper coils wrapped around a magnetic core. The core gets magnetized by the magnetic field lines produced inside the coils and the fluctuations in the magnetic field bring about the flow of electrical currents.