This product is a coating thickness gauge used to measure the thickness of electroplated coatings or coatings on metal surfaces. It has the ability to measure the thickness of non magnetic coating (such as paint) on magnetic materials such as steel/iron, as well as the thickness of coating (such as paint) on non magnetic materials such as aluminum. Built in precision probe, lithium battery charging. Automatically detect substrate properties and detect coating thickness through electromagnetic induction and eddy current effects. This instrument can non-destructive measure the thickness of the coating, with fast speed and high accuracy. Widely used in manufacturing, chemical industry, automotive and other testing fields. Please Note The curvature of the substrate to be tested is too steep. The area of the substrate to be tested is too small. The surface of the substrate to be tested is rough. There is a strong magnetic field nearby. The ambient temperature/humidity changes significantly. Insufficient battery, please charge in time. Product Parameters 1.Product ModelCTG-20 2.Measuring Range0-1400m 3.Accuracy3%+2m 4.Resolution Ratio0.1m 5.CalibrationZero point calibrationMulti-point calibration 6.Unitmmil 7.Mini Convex Curvature Radius5mm 8.Mini Concave Curvature Radius25mm 9.Mini Measurement Area Diameter20mm 10.Work EnvironmentNo strong magnetic field 11.Work Temperature-10 -+50 12.Humidity20% -90% RH 13.Battery600mAh Lithium battery 14.Size115 x 48 x 18mm 15.WeightAbout 83g 16.Data storage: Support 17.Putty powder test: Support 18.Rotatable screen: Support 19.Auto Power Off: Support Packing list 1.CTG-20 coating thicknes gauge 2.Ferrous calibration substrate 3.Non-Ferrous calibration substrate 4.50/100/250/500/1000m calibration sheet 5.USB data cable 6.User manual