Gas sensor for measuring concentration of component in gas mixture e.g. oxygen in exhaust gas of internal combustion engine, comprises solid electrolyte, diffusion barrier and electrodes

摘要

A sensor comprises a solid electrolyte (12), a diffusion barrier (15) and electrodes. An operating mode is provided that is able to be switched over as a lean operation probe according to a limiting current principle and as a transition probe having a pumped reference. A sensor comprises a solid electrolyte conductive for ions; a diffusion barrier; and electrodes separated by the solid electrolyte. An outer electrode (16) is exposed to a gas mixture, and an inner electrode (17) is situated in a cavity (13) separated from the gas mixture by the diffusion barrier. An operating mode is provided that is able to be switched over as a lean operation probe according to a limiting current principle and as a transition probe having a pumped reference.