Device useful for sensing ammonia and nitrogen oxides(s) gases a

Details Device useful for sensing ammonia and nitrogen oxides(s) gases a Device useful for sensing ammonia and nitrogen oxides(s) gases a

1997-12-29

1999-02-02

Warden, Jill

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing gas sample

73 2331, 73 3105, 73 3106, 73 3107, 204425, 204426, 204428, 204429, 422 83, 422 94, 422 96, 422 97, 422 98, 436111, 436113, 436116, 436117, 436118, 436149, 436151, 436153, G01N 2700

Patent

active

058660755

ABSTRACT:
A device for sensing ammonia (NH.sub.3) and nitrogen oxide (NO.sub.x) gases comprising: a sensor for detecting said ammonia and said nitrogen oxide gases, said sensor including a substrate and a layer consisting of cuprate material for detection of said ammonia and said nitrogen oxide gases, wherein said layer of cuprate material is selected from the group consisting of Y:Ba:Cu:O (YBCO) and Bi:Sr:Ca:Cu:O (BSCCO); a sensor holder for supporting said sensor; a perforated cap positioned over said sensor, said perforated cap having openings for passage of said ammonia and said nitrogen oxide gases to said sensor; a detection circuit communicating with said sensor for measuring output from said sensor; and a display or recording device connected to said detection circuit for displaying or recording a concentration of said ammonia and said nitrogen oxide gases based on the output from said sensor.

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Halasz et al Decomposition of nitric oxide and its reduction by co over super-conducting and related cuprate catalysts. Catalysis Letters 11 (1991) 327-334.
Mizono et al "Reaction between Nitrogen Monoxide and Carbon Monoxide over Super-conducting Bi Sr CeCu and Related Mixed Oxides", 1991 Bull. Chem. Soc.Jpn 64 1383-1385.
Grantscharore et al "Gas Sensing Characteristics of SuperConducting Coprates," Chemistry Letters, 1991, pp. 1759-1762.
Huang et al "High Tc Superconductors as Nox and Co.sub.x sensor materials". Solid State Ionics 57 (1992) 7-10.

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