Declination-Inclination Fluxgate Magnetometer
- Manufacturer: W.G.L.E. Gurley, Troy, New York, US
- Serial Number: 462042
Background & Usage
This is the prototype fluxgate magnetometer developed by Paul Serson in 1945 for measuring declination and inclination. The hand-wound sensor coil is mounted on a Gurley theodolite. It is believed that this instrument was used at the Baker Lake Magnetic Observatory after its construction. The development of the declination-inclination fluxgate magnetometer greatly simplified the taking of absolute observations, and instruments based on this principle are now found at most major magnetic observatories around the world.
When used with a potentiometer, the instrument could also be used to measure the total field strength. The sensor was aligned in the direction of the magnetic field, and the potentiometer was used to apply a current to the sensor that exactly cancelled the magnetic field. This method worked better in theory than in practice, and was discontinued after the development of the proton precession magnetometer.
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