Magnetic Eddy Current Flaw Detector check the crack.
VID-345 is a magnetic-eddy current defect detector. It is designed to detect cracks and measure their depth, as well as protective coating and layer corrosion, even when using magnetic and eddy-current methods for flaw detection. The user can control products with rough corroded surfaces and measure through insulating coating layers of variable thickness without having to make any additional readjustments.