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Eddy Current Testing (ET)

ETArraySCCIn Eddy Current Testing (ET), a coil carrying an AC current is placed close to the specimen surface, or around the specimen. The current in the coil generates circulating eddy currents in the specimen close to the surface and these in turn affect the current in the coil by mutual induction.

Flaws and material variations in the specimen affect the strength of the eddy currents. The presence of flaws, etc. is therefore measured by electrical changes in the exciting coil. NDT Group Inc. (NGI) provides the following services with this technique:

  • ET Training
  • ET Consulting
  • ET Auditing

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