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MAGNETOMETERS
AND FLUXGATE MEASUREMENT |
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| "If an external field has a component along the axis of the element, a voltage will be produced at the secondary, in direct proportion to the axial component of the external field." |  |
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Basics The element is a two winding device: the first consists of two excitation coils wound along the length of high permeability wire, positioned side by side within a bobbin onto which the second coil is wound. These coils are arranged so that in the absence of an external magnetic field, no voltage is produced in the secondary coil. Advanced One type of element (LFG-A13) incorporates a feedback winding that opposes the external field - using automation, the element can be used as a null indicator. |
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