Magnetic induction measuring method

This is how Magnetic Induction measuring works.

Probes for magnetic induction measuring consist of an iron core around which an exciter coil is wound. A low-frequency alternating current (typically in the Hz range) flows through this coil. This creates an alternating magnetic field around the poles of the iron core.

When the pole of the probe approaches a magnetized object, for example a piece of iron, the iron amplifies the alternating magnetic field. A measuring coil registers this amplification as voltage. How high the voltage difference is depends on the distance between the pole and the iron part. For coated parts, this distance corresponds exactly to the coating thickness.

Where is this process used?

The Magnetic Induction Method is widely used in several industries for non-destructive coating thickness measurement on ferrous metal substrates. Here are key areas where this process is commonly applied.

• Non-magnetic coating material on magnetic base material

• Electroplated layers of chromium, zinc, copper or aluminum on steel and iron

• Paint, enamel, lacquer or plastic coatings on steel and iron

• This method is crucial in any industry where ensuring the correct thickness of a coating on a metal surface is important for protection, functionality, and meeting regulatory standards

Applicable Standards

DIN EN ISO 2178

Available Manufactures and Solutions

Model- MPO

Model- MMS Inspection

Model- FMP

Model- DMP

HELMUT FISCHER

DEFELSKO

Model- ELCOMETER 456

ELCOMETER

Model- POSITECTOR 6000

HITACHI HI-TECH ANALYTICAL SCIENCES

Model- CMI150 & 250

ELECTROPHYSIC

Model -Minitest

Model -Quintsonic

Model -Smartest

Model- CMI730

Model- CMI233 & 243

• Technical comparison datasheet of manufacturers

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