Carbon dioxide sensor

Details Carbon dioxide sensor Carbon dioxide sensor

2006-06-27

2009-12-08

Griffin, Walter D (Department: 1797)

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing liquid or solid sample

Reexamination Certificate

active

07628957

ABSTRACT:
A sensor responds sensitively to low concentrations of carbon dioxide in an atmosphere of air. Carbonates formed at the surface of preferred oxides can be decomposed by raising the temperature, thus reforming the original oxide. A CO2sensor operating according to this principle may be cycled between the temperature at which the surface carbonate is decomposed and the temperature at which the surface carbonate is formed from atmospheric carbon dioxide. The present invention relates to sensors and more particularly to sensors suitable for use in gaseous mixtures containing carbon dioxide.

REFERENCES:
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patent: 4542640 (1985-09-01), Clifford
patent: 6173201 (2001-01-01), Front
patent: 2166244 (1986-04-01), None
Morimoto, T.; Muraishi, H. “Determination of heat of chemisoprtion of carbon dioixde on zinc oxide by means of surface reaction chemistry.” J. Phys. Chem. 1976, 80(17), pp. 1876-1878.
Williams, D.E.; Moseley, P.T. “Dopant Effects on the Response of Gas-Sensitive Resistors Utilising Semiconducting Oxides.” J. Mater. Chem. 1991, 1(5), pp. 809-814.

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