... abil Digital Coating Thickness Gauge InstructionsDescriptions:AT220,AT230 ... tin,etc.) without damage.AT260, AT280 these instruments use both magnetic and vortex thickness measurement methods,can detect the thickness of non-magnetic coating ... coating powders, plastic, rubber, synthetic materials, phosphide layer, chromium, zinc, lead, tin, cadmium and so on.Measuring all non-conductive layer thickness ...