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Temperature Measurement Based on the Viscous Flow of Gas in a Wheatstone‐Bridge Network

 

作者: Harold J. Hoge,  

 

期刊: Review of Scientific Instruments  (AIP Available online 1961)
卷期: Volume 32, issue 1  

页码: 1-6

 

ISSN:0034-6748

 

年代: 1961

 

DOI:10.1063/1.1717135

 

出版商: AIP

 

数据来源: AIP

 

摘要:

A Wheatstone‐bridge arrangement of capillary tubes carrying a flow of inert gas is described, with which the resistance to flow of a capillary tube serving as a thermometer may be measured. The resistance is shown to be proportional to the productT&eegr;, for constant mass rates of flow in the viscous regime. Gas‐viscosity thermometers have relatively open and linear scales, and are usable over wide temperature ranges. With helium gas, for example, the productT&eegr;varies strongly and smoothly with temperature from below 1° to above 1500°K and probably much farther. Experimental tests of Al2O3capillary thermometers in a high temperature furnace are reported. Some of the thermometers were reasonably stable at 1788°K.

 

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