Magnetometer
Videos
A magnetometer is a device that measures magnetic field or magnetic dipole moment. Different types of magnetometers measure the direction, strength, or relative change of the magnetic B-field at a par
Helium vector magnetometer (HVM) of the Pioneer 10 and 11 spacecraft
A marine technician preparing a towed magnetometer for deployment from a ship
The Magnetometer experiment for the Juno orbiter for Juno can be seen here on the end of a boom. The spacecraft uses two fluxgate magnetometers. (See also Magnetometer (Juno))
The compass is a simple type of magnetometer.
SQUID
Videos
A SQUID is a very sensitive magnetometer used to measure extremely weak magnetic fields, based on superconducting loops containing Josephson junctions.
Magnetometer
…optically pumped magnetometers (μOPMs) can be used to detect the origin of brain seizures more precisely and generate less heat than currently available SQUIDs. The device works by using polarized light to control the spin of rubidium atoms which can be used to measure and monitor the magnetic field. Susceptometry…
Sensing element of a SQUID, 2008
A prototype SQUID
The inner workings of an early SQUID, circa 1990