This Coating Thickness gauge adapts Electromagnetic Induction principle and magnetic Induced EDD current.It 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 trading.Auto off mode designed to conserve battery lifeZero, one-point and two-point calibratingDigital LCD displayComes with iron base and non-iron (aluminium) basePortable, user friendly and easy to carry even in pocketCompact design and easy to carryProvides Single, Continuous Difference measurement mode with metric/imperial conversionModel Number: GM200Special Feature: measure the thickness of non-metal coatings on metal surfaceTarget Measure: Non-metal coating thickness on the metal surface Supply: 2 x 1.5V AAA battery(without battery)Display resolution: 0.01mm/1milOperating Temperature: 0~40 CelsiusOperating Humidity: 10~95%RHcolour: yellowMaterial: ABSsize: Item Height: 105mmItem Width: 30.6 mmItem Length: 62 mmMeasuring Range: 0~1.80mm/0~71.0 mil nonmetal coating on metal surfaceAccuracy: +/-0.03mmMinimum base diameter: 50mmCritical base thickness: 0.5mmPackage Contents:1 X Coating Thickness Gauge (Main Unit)6 X Standard Pieces1 X Instruction ManualOnly 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.