| 摘要 |
An oxygen measuring sensor is proposed, having a pump cell (20) with outer and inner pump electrodes (17, 19) disposed on a solid electrolyte (11) which conducts oxygen ions, of which the inner pump electrode (17) is exposed in a diffusion conduit (15) to the gas to be measured. A further electrode (18) of a measuring cell (21) is disposed in the diffusion conduit (15) behind the inner pump electrode (17) in the direction of diffusion, at which a partial oxygen pressure, which lies at least approximately in the vicinity of lambda=1, can be set by means of the pump cell (20), so that the pump cell (20) operates outside of the limiting current range of the current/voltage characteristic curve.
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