What does higher test sensitivity in eddy current testing indicate?

Higher test sensitivity in eddy current testing indicates a greater ability to detect small defects. Sensitivity refers to the test method's capacity to identify flaws or discontinuities in the material being inspected. When a testing method has high sensitivity, it is capable of responding to very minor changes in the electrical conductivity or magnetic permeability of the material, which is often associated with the presence of small defects.

This capability is critically important in applications where detecting tiny cracks or inclusions can prevent significant failures in service. Therefore, in industries such as aerospace or nuclear, where safety is paramount, using a test method with high sensitivity ensures that even the smallest flaws can be identified and addressed before they lead to more serious problems.

Higher sensitivity does not inherently imply a lesser accuracy in results, a reduction in test times, or a limitation of the testing method. In fact, improved sensitivity usually enhances the overall effectiveness of the testing process, leading to safer and more reliable component inspections.