This coating thickness gauge operates on the principles of electromagnetic induction and magnetic induction eddy current. It is designed to measure the thickness of non-metal coatings on metal surfaces. Ideal for use in manufacturing, metal machinery, chemical industries, and commodity inspection, especially in automobile trading. Features include auto power-off to conserve battery life, zero, one-point, and two-point calibration, and a digital LCD display. The device comes with both iron and non-iron (aluminum) bases. It is portable, user-friendly, and compact for easy carrying. Offers single, continuous, and difference measurement modes with metric/imperial unit conversion. Model Number: GM200 Special Feature: Measures non-metal coating thickness on metal surfaces Target Measurement: Non-metal coating thickness on metal surfaces Power Supply: 2 x 1.5V AAA battery (battery not included) Display Resolution: 0.01mm/1mil Operating Temperature: 0C to 40C Operating Humidity: 10% to 95% RH Color: Yellow Material: ABS Dimensions: - Height: 105mm - Width: 30.6mm - Length: 62mm Measuring Range: 0 to 1.80mm (0 to 71.0 mil) for non-metal coatings on metal surfaces Accuracy: 0.03mm Minimum Base Diameter: 50mm Critical Base Thickness: 0.5mm Package Contents: 1 x Coating Thickness Gauge (Main Unit) 6 x Standard Calibration Pieces 1 x Instruction Manual Note: Light and display differences may cause slight variations in the color of the item shown in the picture compared to the actual product. Measurement error tolerance is 1-3cm.