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采用Ａｇ－β－Ａｌ＿２Ｏ＿３为固体电解质，以金属银为参比电极，多孔铂为工作电极，构成全固态ＳＯ＿ｘ电化学气体传感器，其响应电动势符合能斯特方程。评价研究了４５０～７５０℃温度范围内，温度、ＳＯ＿ｘ分压、气体流速与电动势响应之间的关系；在工作范围内，大量的ＣＯ＿２，ＮＯ＿２的存在不影响传感器对ＳＯ＿ｘ的响应。
Ag-β-Al_2O_3 was used as solid electrolyte, silver metal as reference electrode and porous platinum as working electrode. All solid-state SO_x electrochemical gas sensor was constructed. The response electromotive force accorded with Nernst equation. The relationship between the temperature, the partial pressure of SO_x, the gas flow rate and the electromotive force response was evaluated in the temperature range of 450-750 ℃. The presence of a large amount of CO_2 and NO_2 did not affect the sensor response to SO_x in the working range.