The flaw detector is designed to detect cracks, porosity, inadmissible thinning and other violations of the continuity of internal and external protective dielectric coatings (paint, powder, film, bitumen and other dielectric coatings up to 1 mm thick) on metal products by applying a pulsed high-voltage voltage and fixing an electric breakdown in places of discontinuity or inadmissible thinning Features: the ability to control coatings with a thickness of 40 microns to 1 mm; completing with specialized rubber electrodes for paint and varnish coatings; digital indication of the voltage on the electrode; high stability of the voltage on the electrode; the ability to adjust the sensitivity; the ability to quickly replace battery; external battery charging; high operational safety due to pulsed operation; a large set of replaceable electrodes for control of products for various purposes; small dimensions and weight; the ability to control coatings on concrete structures ..