Measuring and testing – Gas analysis – Gas of combustion
Patent
1996-10-15
1999-09-07
Dombroske, George M.
Measuring and testing
Gas analysis
Gas of combustion
G01N 27419, G01N 2746
Patent
active
059489642
ABSTRACT:
Disclosed is a NOx sensor and a method of measuring NOx capable of obtaining a large change in signal to measure a concentration of low concentration NOx in a measurement gas continuously and accurately with good response over a long period of time. A NOx sensor comprises a first internal space into which the measurement gas is introduced through a first diffusion rate-determining passage, a second internal space arranged with a NOx-reducing catalyst, into which an atmosphere is introduced through a second diffusion rate-determining passage, an electrochemical pumping cell for controlling a partial pressure of oxygen in the internal space by using a first oxygen ion-conductive solid electrolyte and electrochemical cells provided in contact therewith, a partial oxygen pressure-detecting means for detecting the partial pressure of oxygen in the internal space by using the first oxygen ion-conductive solid electrolyte and electro-chemical cells provided in contact therewith, a first electrochemical sensor cell for outputting an electromotive force corresponding to the partial pressure of oxygen in the internal space, and a voltage-detecting means for detecting the electromotive force outputted from the first electrochemical sensor cell. The NOx concentration is determined from a value of the electromotive force of the first electrochemical sensor cell detected by the voltage-detecting means.
REFERENCES:
patent: 5034112 (1991-07-01), Murase et al.
patent: 5145566 (1992-09-01), Logothetis et al.
patent: 5217588 (1993-06-01), Wang et al.
patent: 5397442 (1995-03-01), Wachsman
patent: 5476001 (1995-12-01), Hoetzel et al.
patent: 5493896 (1996-02-01), Riegel
patent: 5507174 (1996-04-01), Friese et al.
Dombroske George M.
NGK Insulators Ltd.
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