Pennie & Edmonds
Room temperature carbon monoxide gas sensor and the process for preparing the same
 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. 
Chang Chun Institute of Applied Chemistry of the Chinese Academy of Sciences
G G
G01N G01N
inventional inventional
Xiuying Wenfan
Liu Li