Electrochemical gas sensor arrangement e.g. for gas sensor, has test electrodes positioned over diffusion part and being in gas flow connection to environment

摘要

An electrochemical gas sensor arrangement in a housing (130) has several test electrodes (2, 3), a backplate electrode (7), a reference electrode (8, 9, 60) and electrolytes. The test electrodes are positioned over a diffusion part and are in a gas flow connection to the environment. The test electrodes stand over a gas flow channel being in gas flow connection with one another. Two test electrodes are located over a common gas flow channel in gas flow connection. The diffusion part is in the form of capillary elements or diffusion barriers.