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Pulsed Field Magnetometers apply a “pulse” of magnetic
field to generate the applied magnetic field. This has the advantage
that the field can be strong enough to saturate any magnetic material.
They can also give operators full-loop measurement of
any magnetic material if required.
PFM’s solve the issue of eddy currents by accepting that
there will be eddy currents induced in the sample, but by quantifying
and correcting the effects of eddy currents the difficulty disappears.
This correction process is very accurate and contributes
greatly to the quality control benefits offered by PFM through this
technological innovation.
Hirst Magnetic Instruments’ work on overcoming the
issues of eddy current in PFM has resulted in the technology being
patented to protect its importance to the company.
In addition, the PFM provides added versatility in that
it can process a large dynamic range of samples and can accept large
samples in the final application shape.
PFM’s also measure very rapidly. A single sample can be
measured and have all the effects of eddy currents corrected within 1
second depending on the machine model.
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