Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing gas sample
Patent
1992-03-24
1995-05-02
Warden, Jill A.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing gas sample
422 83, 422 88, 436172, G01N 2164
Patent
active
054117097
ABSTRACT:
A gas detector for simultaneously detecting a kind of gas to be detected and a gas concentration by simultaneously effecting adsorption-measuring type gas detection and optical gas detection. The gas detector comprises a gas detecting element having a gas sensitive thin film disposed on a piezoelectric vibrating element and adapted to generate fluorescence or phosphorescence when irradiated with a light, an oscillating unit for oscillating the piezoelectric vibrating element, a frequency detecting unit for detecting an oscillation frequency of the piezoelectric vibrating element, a light emitting element for irradiating the gas sensitive thin film with light and a light receiving element for receiving the fluorescence or phosphorescence generated from the gas sensitive thin film and adapted to detect the intensity of the fluorescence or phosphorescence. The gas detecting element is disposed in a reaction tank provided with a gas passageway and having a light transmissive window.
REFERENCES:
patent: 4897541 (1990-01-01), Phillips
"Surface Acoustic Wave Sensors Incorporating Langmuir-Blodgett Films", Thin Solid Films, 160 (1988) pp. 445-452.
"Simultaneous Electrical Conductivity and Piezoelectric Mass Measurements on Iodine-Doped Phthalocyanine Langmuir-Blodgett Films", Langmuir, vol. 2, No. 4 (1986) pp. 513-519.
Furuki Makoto
Pu Lyong S.
Fuji 'Xerox Co., Ltd.
Warden Jill A.
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