Application: 
　　Used for measuring thickness and corrosion of pressure vessels, chemical equipment,
　　boilers, oil storage tanks etc. in industries of petroleum, shipbuilding, and machine
　　manufacturing. 

　　Specifications:
　　Measuring range: 1.5-200mm, 0.06-8inch
　　Operating principle: ULTRASONIC 
　　Materials measured: any hard materials, including steel, cast iron, aluminum, red
　　copper, brass, zinc, quartz glass, polyethylene, PVC, gray cast iron, nodular cast iron
　　and other materials 
　　Sound velocity: 500-9000m/s
　　Lower limit steel pipes: ф15x2.0mm, ф20x3.0mm determined by the transducer
　　Calibration block: included
　　Resolution: 0.1mm
　　Accuracy: ±(0.5%n+0.1)
　　Power supply: 4x1.5V AA(UM-3)battery
　　Battery indicator: low battery indicator
　　Operating conditions: 0-+45℃(32℉-104℉), ≤90%RH
　　Dimensions: 160x68x32mm
　　Weight: 208g (not including battery)