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Water triple-point bottle
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Water triple-point bottle

The water triple-point bottle is the only temperature fixed point defined by both the thermodynamic temperature scale and the international temperature scale. The unit of thermodynamic temperature, Kelvin, is defined as 1/273.16 of the thermodynamic temperature of water triple point. It is also the fixed point defined by the international temperature scale (ITS-90) in 1990. Therefore, the water triple-point temperature is the most important, accurate and easy-to-use temperature standard. The water triple point is reproduced by using a water triple-point bottle. The water triple-point bottle contains high-purity water whose isotopic composition is equivalent to seawater. If you have a standard platinum resistance thermometer, you must have a high-quality water triple-point bottle. The purity of water triple-point bottle produced by our company is extremely high and the uncertainty is extremely low. The temperature of 0.01℃ is achieved with an expanded uncertainty of less than 0.0001℃. 
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The water triple-point bottle is the only temperature fixed point defined by both the thermodynamic temperature scale and the international temperature scale. The unit of thermodynamic temperature, Kelvin, is defined as 1/273.16 of the thermodynamic temperature of water triple point. It is also the fixed point defined by the international temperature scale (ITS-90) in 1990. Therefore, the water triple-point temperature is the most important, accurate and easy-to-use temperature standard. The water triple point is reproduced by using a water triple-point bottle. The water triple-point bottle contains high-purity water whose isotopic composition is equivalent to seawater. If you have a standard platinum resistance thermometer, you must have a high-quality water triple-point bottle. The purity of water triple-point bottle produced by our company is extremely high and the uncertainty is extremely low. The temperature of 0.01℃ is achieved with an expanded uncertainty of less than 0.0001℃. 

For the water triple-point bottle, dry ice or liquid nitrogen shall be used to make triple points by means of freezing, and then it shall be stored in the ice bath composed of crushed ice and water. NM-03 Automatic Freezing and Storage Device of Water Triple-point Bottle produced by our company can also be used to automatically realize the automatic freezing and storage of water triple-point bottle.

Technical Parameters

★ Overall dimensions of water triple-point bottle:
★ Trap hole diameter of water triple-point bottle: 
★ Reproducibility of water triple-point bottle:
 

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Water triple-point bottle
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