Patent ID: 6485175
Filing Date: 2002-11-26
Classification: G01F,G01K

Abstract:
In a gas pipeline, a flow measuring instrument for measuring gas flowing through the pipeline and a temperature sensing device positioned within an opening in the pipeline for sensing the temperature of the flowing gas in the pipeline for use in the flow calculation, said temperature sensing device comprising:a hollow metallic outer tube extending within said pipeline transversely of the gas flow and having a closed end to define a thermowell; a temperature sensing probe received within said thermowell; a metallic housing secured to said outer tube and secured to said pipeline for mounting said sensing device on said pipeline, said outer tube formed of an aluminum material having a high thermal conductivity and said metallic housing having a low thermal conductivity between about 4 and 15 BTU/Ft. Hr/Ft2/Â° F.; and a plurality of annular fins formed of a metallic material having a high thermal conductivity mounted about said tube for thermal transfer to said temperature sensing probe from said tube.