多孔气体扩散电极法一氧化碳传感器的研制

Carbon monoxide gas sensor

研制了一种应用多体扩散电极的方法测定空气中低浓度一氧化碳的传感器。电极电位控制在１．２Ｖ（ＳＨＥ），当空气中ＣＯ扩散到传感器时，在阳极被氧化成ＣＯ２，其氧化电流与ＣＯ浓度成正比例。传感器灵敏度约为０．５μＡ／ｍｇ·ｍ－３，可测浓度范围０～１００ｍｇ／ｍ３，传感器寿命大于１年。

A gas sensor cell is made of planar sensing, counter and reference porous gas diffusive electrodes, seperated by a hydrophilie nonconducting porous seperator which contains an electrolyte. The sensor cell is characterized by the detection of CO as distinct from NO2, SO2. This sensor has a sensitivity of 0.5μA/mg·m-3 CO in range of 0～100mg/m3 CO.