The ElektroPhysik 80-137-1500 MiniTest 735 Coating Thickness Gauge F05M-90 90° Micro Sensor, Ferrous Metals, 20 mils / 500 Microns is the solution to all your coating thickness problems where a reliable finish and perfect product appearance play a major role for long-term value and success, e.g. in the automotive and shipbuilding industry, steel- and bridge construction or in the electroplating industry, to name a few industries.