Title :
A Nasicon CO2 gas sensor with drift-detection electrode
Author :
Chen, Song ; Jeng, De-Yin ; Hadano, Hironori ; Ishiguro, Yoshiaki ; Nakayama, Masakatsu ; Watanabe, Kenzo
Author_Institution :
Res. Inst. of Electron., Shizuoka Univ., Hamamatsu, Japan
Abstract :
A Nasicon (sodium super ion conductor) CO2 gas sensor with a new structure is developed for monitoring CO2 levels in the atmospheric air. In addition to the sensing and reference electrodes of a conventional Nasicon sensor, an auxiliary electrode, referred to as the base electrode, is provided with the new structure. The principle of CO2 detection is the same as that of a conventional Nasicon sensor, but the durability is greatly improved by using a nonaqueous carbonate as the sensing material. Characterization has also revealed that the output voltage at the base electrode is closely correlated with the drift at the sensing electrode and is available for the drift compensation.
Keywords :
atmospheric measuring apparatus; carbon compounds; electrochemical electrodes; electrochemical sensors; gas sensors; solid electrolytes; CO2; NaSi; Nasicon CO2 gas sensor; atmospheric monitoring; base electrode; drift compensation; drift-detection electrode; nonaqueous carbonate material; sodium superionic conductor; Atmospheric measurements; Carbon dioxide; Conductors; Electrodes; Gas detectors; Monitoring; Pollution measurement; Sensor phenomena and characterization; Solids; Zirconium;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2003.818561
