Abstract
The present study was undertaken to investigate the practical use of SO2 gas sensor employing β″-alumina solid electrolyte in the field of industry. In the cell with β″-alumina solid electrolyte, the use of (β″+β″)-alumina coexistent mixture in air as a solid reference electrode lead to a simple structure of the SO2 gas sensor. In this paper we reported the practical application of SO2 gas sensor with the following cell in copper smelting plants.Pt, (β+β″)-alumina in air/β″-alumina/S02+O2+SO3, PtFrom the present experiments the following conclusions were obtained.1) The present experimental cell showed a satisfactory response and the data agreed very closely with those obtained by another analytical method (non-dispersive infrared rays).2) In a long period of measuring, the emf's of this sensor varied with the lapse of time. However it was confirmed that its reproducibility is obtained by the correction of the calibration curve once a few days.
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