An instrument used to measure the intensity of a magnetic field without reference to other magnetic instruments.



Related Terms

ELECTROKINETOGRAPH

An instrument used to measure ocean current velocities based on their electrical effects in the magnetic field of the earth.

DIP NEEDLE

A magnetic needle suspended so as to be free to rotate about a horizontal axis. An instrument using such a needle to measure magnetic dip is called a DIP CIRCLE. A dip needle with a sliding weight that can be moved along one of its arms to balance the magnetic force is called a HEELING ADJUSTER.

HALL-PLATE DEVICE

A sensor that uses the Hall effect to measure magnetic field strength.

IMPEDANCE MAGNETOMETER

An instrument for determining local variations in magnetic field by measuring the change in impedance of a high-permeability nickel-iron wire.

HALL-EFFECT GAUSSMETER

A gaussmeter that consists of a thin piece of silicon or other semiconductor material which is inserted between the poles of a magnet to measure the magnetic field strength by means of the Hall effect.

ELECTRODYNAMIC AMMETER

Instrument which measures the current passing through a fixed coil and a movable coil connected in series by balancing the torque on the movable coil (resulting from the magnetic field of the fixed coil) against that of a spiral spring.

FLUXMETER

An instrument for measuring the intensity of a magnetic field

HORIZONTAL MAGNETOMETER

A measuring instrument for ascertaining changes in the horizontal component of the magnetic field intensity.

FLUX GATE

A detector that gives an electric signal whose magnitude and phase are proportional to the magnitude and direction of the external magnetic field acting along its axis; used to indicate the direction of the terrestrial magnetic field.

LINE OF FORCE

A line indicating the direction in which a force acts, as in a magnetic field

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