According to the current limitation principle oxygen concentration detecting with oxygen - supply / discharge - function

摘要

Oxygen concentration - detecting device, withan oxygen concentration - detection unit (11), which has a first solid electrolyte layer (14) with a surface on a reference gas side and a surface on a measuring gas side, a diffusion-resistant layer (13) in contact with the first solid electrolyte layer and a pair of the on both surfaces of the first solid electrolyte layer electrodes (15a, 15b, 15e) includes,the first solid electrolyte layer is used for this purpose, a current limit value according to the concentration of oxygen in a measured gas, if a voltage is applied to the electrodes;an oxygen - supply / discharge - unit (12), which a second solid electrolyte layer (16) with a surface on a reference gas side and a surface on a measuring gas side and a pair of on the two surfaces of the second solid electrolyte layer electrodes (15c, 15d, 15e) includes,the supply / discharge - unit between the supply of oxygen to the electrode to its reference gas side and the ejection of oxygen to the electrode side on its measuring gas selects;..