A sensor arrangement for determining gas components and gas concentrations of gas mixtures (gas mixtures of gas mixtures and /

摘要

The present invention relates to a sensing device for determining gas components and / or gas concentrations of CO, NOx, HC in a gas mixture, in particular in an exhaust gas of an internal combustion engine. The sensing device has a measuring element (10) arranged in a diffusion duct (23). The diffusion duct 23 is connected to the gas mixture through the exhaust gas-side orifice 24 and to the gas mixture via the reference gas-side orifice 25 and to the reference gas through the reference gas-And the oxygen partial pressure in the reference gas becomes larger in the gas mixture. In the diffusion duct 23, the oxygen change rate and the rate of change of the gas component to be determined are set to be opposite directions. The measuring element 10 is arranged so that oxygen in the measuring element 10 is excessively present in relation to the rate of change of the contaminant and the rate of change in oxygen.