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By certification 
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: 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: Ñ„15x2.0mm, Ñ„20x3.0mm determined by the transducer
Calibration block: included
Resolution: 0.1mm(TM8812C 0.01mm)
Accuracy: ±(0.5%n+0.1)
RS232C interface: with RS232C
Power supply: 4x1.5V AAA (UM-4)battery
Battery indicator: low battery indicator
Operating conditions:0-+45℃(32℉-104℉),≤90%RH
Dimensions: 120x62x30mm
weight: 164g(not including battery)
Optional Accessories:
6MФ6mm thin Material probe:Measuring range(steel): 1.0 50.0mm Operating temperature: -10~+60℃
5MФ12high temperature probe: Measuring range(steel): 1.0~225.0mm(normal temperature) Measuring range(steel): 4.0~100.0mm (high temperature) Operating temperature: -10~+300℃
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: 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: Ñ„15x2.0mm, Ñ„20x3.0mm determined by the transducer
Calibration block: included
Resolution: 0.1mm(TM8812C 0.01mm)
Accuracy: ±(0.5%n+0.1)
RS232C interface: with RS232C
Power supply: 4x1.5V AAA (UM-4)battery
Battery indicator: low battery indicator
Operating conditions:0-+45℃(32℉-104℉),≤90%RH
Dimensions: 120x62x30mm
weight: 164g(not including battery)
Optional Accessories:
6MФ6mm thin Material probe:Measuring range(steel): 1.0 50.0mm Operating temperature: -10~+60℃
5MФ12high temperature probe: Measuring range(steel): 1.0~225.0mm(normal temperature) Measuring range(steel): 4.0~100.0mm (high temperature) Operating temperature: -10~+300℃
