This Coating Thickness gauge adapts Electromagnetic Induction principle and magnetic Induced EDD currentIt can measure the thickness of non-metal coatings on metal surface.This unit is Perfect for manufacturing company, metal machinery industry, chemical industry, and commodity inspection especially in automobile tradingAuto off mode designed to conserve battery lifeZero, one-point and two-point calibratingDigital LCD displayComes with iron base and non-iron (aluminium) base.Portable, user friendly and easy to carry even in pocketCompact design and easy to carryProvides Single, Continuous & Difference measurement mode with metric/imperial conversionItem Height: 105mmItem Width: 306 mmItem Length: 62 mmModel Number: GM200Special Feature: measure the thickness of non-metal coatings on metal surfaceTarget Measure: Non-metal coating thickness on the metal surfaceMeasuring Range: 0~180mm/0~710 mil nonmetal coating on metal surfaceAccuracy: +/-003mm Supply: 2 x 15V AAA battery(without battery)Minimum base diameter: 50mmCritical base thickness: 05mmDisplay resolution: 001mm/1milOperating Temperature: 0~40 CelsiusOperating Humidity: 10~95%RHColor: whiteMaterial: ABSPackage Contents:1 X Coating Thickness Tester1 X English manual6 pcs x Standard AccessoriesOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.