... ,boilers,oil storage tanks,etc. Application:used for measuring thickness and corrosion of pressure vessels,chemical equipment,boilers,oil storage ... ±1-3%n or ±2.5umMin. measuring area: 6mmMin. sample thickness: 0.3mmBattery indicator: low battery indicatorMetric/ imperial: convertiblePower supply: 4x1 ... battery)Optional accessories: other range 0-200um to 15000um Coating Thickness Meter CM-8826FN