Device for selectively determining the components of gas mixture

Details Device for selectively determining the components of gas mixture Device for selectively determining the components of gas mixture

1984-08-03

1986-04-29

Kreitman, Stephen A.

Measuring and testing

Gas analysis

Gas chromatography

G01N 2712

Patent

active

045848670

ABSTRACT:
The device comprises a gas sensor containing a predetermined number of sensor elements which change their electric conductivity under the action of gases. Such a gas sensor is used for selectively determining the components of gas mixtures. For this purpose the individual sensor elements are arranged on a heat-resistant, thermally insulating substrate and the individual sensor elements are sensitized for the determination of different components of the gas mixture by selecting different materials and/or operating temperatures for the individual sensor elements. The sensor elements and its components are arranged such that the gas mixture to be investigated is guided past the sensor elments in a directed flow. The temperatures of the sensor elements increase in a stepwise manner in the direction of the gas flow and thereby a further increase in the selectivity of the gas sensor is achieved.

REFERENCES:
patent: 3695848 (1972-10-01), Taguchi
patent: 3714562 (1973-01-01), McNerney
patent: 3831432 (1974-08-01), Cox
patent: 4164862 (1979-08-01), Jackson
patent: 4453397 (1984-06-01), Ohta et al.
patent: 4457161 (1984-07-01), Iwanaga et al.
Publication by H. Arima et al entitled: "New City Gas Detector Using a Thick Film Hybrid Sensor", in 32nd Electronic Components Conference, May 10-12, 1982, San Diego, Calif., pp. 290-295.
Patents Abstracts of Japan, vol. 6, No. 141, (p. 131) [1019] Jul. 30, 1982.

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