Electrochemical sensor for CO2 monitoring

The performance of zirconia-based electrochemical sensor for CO2 monitoring is described. The basic components of the sensor include yttria-doped cubi c zirconia as a solid electrolyte and a mixture of carbonates as a CO2 sens ing material. In the range of 12-18 PPM Of CO2 the sensor's response time a t 773 K is about 90 s. The sensor exhibits stable performance characteristi cs within 3-4 months. It is shown that sensor performance is determined by the formation of an ionic bridge that is formed during a special activation procedure.