Features: 1. Accurate Measurement: With advanced probe and micron level accuracy, the thickness gauge can measure the layer thickness efficiently and accurately. 2. Fe+Zn Detection: Possesses ungraded Fe+Zn (zinc coating) detection function, the gauge can be used to judge whether it is an original accessory of the car. 3. Automatic Operation: This gauge can realize automatic identification of substrate type. Magnetic substrate, non magnetic substrate can be used. 4. Easy Carrying: Comes with small size and lightweight, you can easily take this gauge with you to help with your work. 5. Wide Application: This gauge is widely used in automobile paint thickness detection, steel structure paint engineering, aerospace industry, shipbuilding industry, metal surface treatment, etc. Specification Item Type: Coating Thickness Tester Material: ABS Battery: AAA battery x 2 (shipped without battery) Fe Probe, (Iron Base Fe+Zn Galvanized Substrate) Principle: Electromagnetic induction Principle of NF Probe (non magnetic substrate such as aluminum, copper): Eddy current effect Measuring Range 0 to 1500 μ m, 059.1mil Accuracy: ± (3%+2 μ m), ±(3%+0.08mil) Resolution: 0.1 μ m/0.01mil Calibration: 0 calibration; Multipoint calibration Minimum Radius of Curvature of Convex Surface: Approx. 1.5mm / 0.06in Minimum Concave Curvature Radius: Approx. 25mm / 0.98in Minimum Measured Area Diameter: Approx. 6mm / 0.24in Minimum Base Material Thickness: 0.5mm (0.02in ), 0.3mm (0.012in ) Operating Ambient Temperature: - 20 to 40 ℃ (- 4 to 104 ℉) Humidity: 20% to 90% RH; No strong magnetic field Package List 1 x Coating Thickness Tester1 x Lanyard 1 x Manual1 x Cloth Bag 1 x Iron Base Plate1 x Aluminum Base Plate4 x Calibration Card