We are offering ultrasonic thickness gauge.detailed product description 4 digits 10mm lcd display coating thickness meter range 0 to 1000 um 0-40 mil, widely used to measure the thickness of. application: used for measuring thickness and corrosion of pressure vessels, chemical equipment, boilers, oil storage tanks, etc. In industries of petroleum, shipbuilding, power station, and machine manufacturing. features:4 digits 10mm lcd displaycoating thickness meter range 0 to 1000 um 0-40 mil, widely used to measure the thickness of non magnetic material (paint, plastic, porcelain, enamel, copper, zinc, aluminum, chrome etc. specifications:operating principle: magnetic induction (f)measuring range:0-1000umresolution; 0.11accuracy: 1-3%n or 2.5ummin. Measuring area: 6mmmin. Sample thickness: 0.3mmbattery indicator: low battery indicatormetric imperial: convertiblepower supply: 4x1.5v aa (um-3) batteryauto power offoperating conditions:0-+45c(32f-104f), 90%rhoptional accessories: other range 0-200um to15000 um