Room temperature carbon monoxide gas sensor and the process for

Details Room temperature carbon monoxide gas sensor and the process for Room temperature carbon monoxide gas sensor and the process for

1994-12-16

1996-12-31

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204421, 264 56, 264 60, 264104, 422 98, 427 58, 4271263, 4273741, G01N 2712, G01N 2726

Patent

active

055890466

ABSTRACT:
The present invention relates to a room temperature carbon monoxide gas sensor and a process for preparing the same. The said sensor is prepared by using SnO.sub.2 as base material, Y.sub.2 O.sub.3 La.sub.2 O.sub.3, Cr, Pt black and Al.sub.2 O.sub.3 as additives, after grinding, sintering and aging steps, a sensor which can quantitative and selectively detect carbon monoxide in the atmosphere having a carbon monoxide concentration in the range of 25-600 ppm is obtained. Due to the addition of high purity Cr, the rate of adsorb and desorption of gases of the sensor of the present invention is accelerated, the response and recovery time are less than 10 and 15 seconds respectively.

REFERENCES:
patent: 3865550 (1975-02-01), Bott et al.
patent: 4111658 (1978-09-01), Firth et al.
patent: 4242302 (1980-12-01), Kitamura et al.
patent: 5226309 (1993-07-01), Stetter et al.
patent: 5228975 (1993-07-01), Yamada et al.

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