Heated sampling hose assembly and related method
AssigneeGeneral Electric Company
InventorsBoris Eiteneer, Glenn England, Brian Jacobs
Life of this patent
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Abstract
A heated sampling hose assembly includes a sampling hose having an inlet and an outlet for passage of a sample gas. An outer sleeve surrounds the sampling hose with an annular purge gas passage radially therebetween. The outer sleeve is closed at opposite ends by first and second fittings having a purge gas inlet and purge gas outlet, respectively, and a heater is arranged to heat the purge gas in the annular purge gas passage to a temperature of the sample gas.
Claims30
A heated sampling hose assembly comprising a sampling hose having an inlet and an outlet for passage of a sample gas;
- an outer sleeve surrounding said sampling hose with an annular purge gas passage radially therebetween, said sleeve closed at opposite ends by first and second fittings having a purge gas inlet and purge gas outlet, respectively;
- and a heater arranged to heat purge gas in said annular purge gas passage to a temperature of said sample gas.
A heated sampling hose assembly comprising a sampling hose having an inlet and an outlet;
- an outer sleeve surrounding said sampling hose with an annular purge gas passage radially therebetween, said outer sleeve closed at opposite ends by first and second fittings having a purge gas inlet and purge gas outlet, respectively;
- a first heater surrounding a portion of said outer sleeve and a second heater upstream of said first fitting for heating said purge gas.
A method of improving measurement accuracy of a sampling hose assembly by reducing sampling bias associated with permeation of chemical species of interest through a sampling hose into a sample gas comprising:
- (a) surrounding the sampling hose with an outer sleeve establishing a radial purge passage between the sampling hose and the outer sleeve;
- (b) providing a source of purge gas substantially free of the chemical species of interest;
- (c) heating the sampling hose;
- and
- (d) passing said purge gas through said radial purge passage while passing the sample gas through the sampling hose.
Dependencies are inferred from the claim text.