What is the purpose of using different probe sizes in Eddy Current Testing?

Using different probe sizes in Eddy Current Testing is crucial for effectively matching the probe to the specific sizes and types of defects being investigated. The size of the probe influences the depth of penetration and sensitivity to various defect characteristics. Smaller probes can detect smaller cracks and surface defects, while larger probes may be more suited for identifying larger or deeper flaws. By selecting the appropriate probe size, technicians can enhance the accuracy and reliability of the detection process, ensuring that they can identify relevant issues in the material being tested. This tailored approach correlates effectively with the measurement goals, ultimately leading to more precise evaluations in non-destructive testing applications.