... high-speed DSP chip, have fast measurement abil Digital Coating Thickness Gauge InstructionsDescriptions:AT220,AT230, AT240 these instruments use magnetic ... Specifications: ModelRangeApplicationAT-220(One magnetic)0~1250 μmMeasuring the thickness of the non-magnetic coatings on steel, iron and other ... synthetic materials, phosphating layer, oxidation layer AT-280 Digital Coating Thickness Gauge