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. Model: TM8812 TM8812C Measuring range (metric/imperial): 1.0-200mm,0.05-8inch Operating principle: ULTROSONIC Materials measured: any hard materials, including steel, cast iron, aluminum, red ...