Which instrument is primarily used for conducting Eddy Current Testing?

Eddy Current Testing (ECT) is a non-destructive testing technique used to detect surface and near-surface flaws in conductive materials. The primary instrument for ECT is an Eddy Current Testing machine, which typically includes an eddy current probe. This probe generates an alternating magnetic field, which induces eddy currents in the material being tested. The response of these eddy currents is then analyzed to evaluate the integrity of the material, detect defects, and assess the thickness of coatings.

An eddy current probe is essential for the operation because it needs to be in close proximity to the material under investigation. By measuring changes in the induced eddy currents, the system can determine variations in material properties, which is crucial for identifying faults or changes in wall thickness.

Other instruments listed, like a resistance meter, weight scale, or voltage meter, are not designed to perform the specific tasks required for Eddy Current Testing. They serve different purposes in their respective testing methodologies and are not capable of generating or measuring the eddy currents needed for this technique.