Application Note: DefHi ECA Probe for Defect Detection in Capacitor Fine Tube Welds [PDF Download Available]

Currently, seamless welded tubes are commonly used in capacitors. These tubes are prone to defects along the weld seam, such as axial cracks, blowholes, poor fusion, and inadequate melting. These defects make it difficult to achieve accurate sizing and classification assessments with standard eddy current bobbin probes. The reason is that the bobbin coil provides an average response over 360°, and the proportion of the weld defects relative to the entire tube wall being inspected by the probe is very small. To address this issue, Eddyfi Technologies has developed the "DefHi Probe," an eddy current array probe that uses multiplexing.


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