... Specifications: ModelRangeApplicationAT-220(One magnetic)0~1250 μmMeasuring the thickness of the non-magnetic coatings on steel, iron and other ... magnetic)AT-220F(wholeness vortex)Measuring all non-conductive layer thickness on copper ,aluminum, stainless steel and some non- ... tin, cadmium and so on.Measuring all non-conductive layer thickness of copper ,aluminum, stainless steel and some the non ...