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Magnetic Induction

Magnetic Induction — principally used for measuring the thickness of a non-magnetic coating (zinc, cadium, paint, powder coating) over a steel substrate.


Eddy-current
Magnetic induction
Microresistance
Beta backscatter
X-Ray fluorescence
Recent Developments

This principle is used for measuring the thickness of a non-magnetic coating (zinc, cadmium, paint, powder coating, etc.) over a steel substrate.

The probe system is essentially the secondary of a transformer circuit that reacts to the presence of a magnetic material. The circuit efficiency and output voltage increase when the probe is brought near a magnetic surface, providing parameters which may be used to measure the distance (coating thickness) from the magnetic surface.