Calibration Standard
All Hirst’s Gaussmeters and probes are calibrated to standards
traceable to the National Physical Laboratory (NPL).
<>During manufacture, the accuracy of Nuclear Magnetic Resonance
(NMR) is used to determine the irregularities and non-conformities of
the equipment including Hall Probes. This information is stored
in the
individual Probe as well as the instrument and used mathematically to
automatically correct readings taken by the instrument making it
extremely accurate. This enables probes to be fully
interchangeable
without the need for recalibration.

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Hall Effect Principle
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