... storage tanks,etc Application:Used for measuring thickness and corrosion of pressure vessels,chemical equipment,boilers,oil ... tanks,etc.in industries of petroleum,shipbuilding,power station,and machine manufacturing.Specification:Measuring range (metric/imperial): 1 ... , zinc, quartz glass, polyethylene, PVC, gray cast iron, nodular cast iron and other materials Sound velocity: 500-9000m/sLower limit ...