CO.sub.2 sensor and measurement circuit using the sensor

Details CO.sub.2 sensor and measurement circuit using the sensor CO.sub.2 sensor and measurement circuit using the sensor

1996-07-15

1998-06-02

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204402, 204421, 204426, 205687, 205784, G01N 27407

Patent

active

057593663

ABSTRACT:
A CO.sub.2 sensor includes a body of solid electrolyte ceramic with alkali ion conductivity, and two electrodes of conductor material being inert with respect to the solid electrolyte ceramic. At least one of the electrodes is at least partially permeable, and the solid electrolyte ceramic is galvanically prepolarized. A measurement circuit configuration includes the CO.sub.2 sensor and a voltage measuring device coupled to the electrodes of the solid electrolyte ceramic body.

REFERENCES:
patent: 4298573 (1981-11-01), Fujishiro
patent: 5194134 (1993-03-01), Futata et al.
Ionic conductivity of NASICON-type conductors Na.sub.1.5 M.sub.0.5 Zr.sub.1.5 (PO.sub.4).sub.3 (M:A1.sup.3+,Ga.sup.3+,Cr.sup.3+,Sc.sup.3+,Fe.sup.3+,In.sup.3+,Yb.sup.3+, Y.sup.3+), (Saito et al.), 6030 Solid State Ionics, Dec. 1992, No. 3/4, Amsterdam, NE. pp. 327-331.
"High-performance solid-elctrolyte carbon dioxide sensor with a binary carbonate electrode", Miura et al.), 8253b Sensors and Actuators B Chemical, Oct. 1992, No. 3, Lausanne, CH, pp. 165-176.
"Carbon Dioxide Sensor Using Sodium Ion Conductor and Binary Carbonate Auxiliary Electrode", (Miura et al.), dated May 1992, Journal of the Electrochemical Society, vol. 139, No. 5, pp. 1384-1388.
"Potentiometric Gas Sensor for Carbon Dioxide Using Solid Electrolytes", (Maruyama), dated 1987 month unavailable, Solid State Ionics 23, North Holland, pp. 107-112.
"Solid State Electrochmical CO.sub.2 Gas Sensor Using Zircon-Based Sodium Ionic Conductors", (Sadaoka et al.), dated 1993 month unavailable, Journal of Materials Science 28, Japan, pp. 2035-2039.
"Solid State Chemical Sensors in Thick Film Technique", (Erdmann et al.), dated Sep. 1990, Micro System Technologies 10-13, Berlin, pp. 1-6.
"Thin and Thick Film Electrochemical CO.sub.2 Sensors", (Chu et al.), dated 1992 month unavailable, Solid State Ionics 53-56, North Holland, pp. 80-84 .

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