Measuring and testing – Gas analysis – Gas of combustion
Patent
1997-12-08
1999-09-07
Larkin, Daniel S.
Measuring and testing
Gas analysis
Gas of combustion
73 3105, 204424, 204427, 422 94, G01N 2700
Patent
active
059489669
ABSTRACT:
A gas sensor for measuring a specific gas component, especially hydrocarbons, in a gas to be measured, including a hydrocarbon prevention filter preferably made of zeolite. An oxygen concentration difference between (1) an oxygen concentration in a gas to be measured from which hydrocarbons are removed by the hydrocarbon prevention filter and further combustible components are removed and (2) a known oxygen concentration or an oxygen concentration in a gas from which only combustible components are removed, is calculated. Once an oxygen amount necessary for a combustion of hydrocarbons is calculated, it is possible to measure a hydrocarbon concentration in a gas to be measured on the basis of the thus calculated oxygen amount.
REFERENCES:
patent: 5143696 (1992-09-01), Haas et al.
Ogawa Naoyuki
Takahashi Tomonori
Larkin Daniel S.
NGK Insulators Ltd.
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