| 摘要 |
A gas-component concentration sensor comprises: a first measurement chamber (2), an oxygen partial-pressure detection electrode, a first oxygen-ion pump cell (6) such that in response to a voltage applied between the pair of electrodes (6a, 6b), the cell pumps out oxygen such that a gas component such as NOx partially decomposes in an amount of not more than 40 wt.%; a second measurement chamber (4) into which the measurement gas is therefrom introduced, a second oxygen pump cell (8) such that in response to a voltage applied between a pair of electrodes (8a, 8b) the second cell decomposes the gas component within the second chamber; wherein the electrode (6b) of the first oxygen ion pump cell provided inside the first measurement chamber includes fine particles having the function of suppressing dissociation of the gas component that are formed on and carried by a first constituent component of the electrode. <IMAGE> |
