Electrochemical measuring cell for detecting oxidizing gases
AssigneeDragerwerk Aktiengesellschaft
InventorHerbert Kiesele
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Abstract
An electrochemical measuring cell for detecting oxidizing gases, containing an electrode with a redox mediator, which is oxidized by the gas to be detected. A measuring electrode is employed made of an inert material, and a counterelectrode is provided. The dynamics and reproducibility of the measured signal are improved by providing the counterelectrode formed of an anodically oxidizable material and is arranged behind the measuring electrode in the direction of diffusion in a sandwich-like arrangement.
Claims18
An electrochemical measuring cell for detecting oxidizing gases, comprising:
- a container with an opening defining a direction of diffusion into the container;
- an electrolyte disposed in the container with a redox mediator, which is oxidized by the gas to be detected;
- a measuring electrode disposed in the container, said measuring electrode being made of an inert material;
- and
- at least one additional electrode acting as a counterelectrode, said counterelectrode comprising an anodically oxidizable material and being arranged behind said measuring electrode in said direction of diffusion in a sandwich arrangement.
An electrochemical measuring cell for detecting oxidizing gases, comprising:
- a container with an opening defining a direction of diffusion into the container;
- an electrolyte disposed in the container with a redox mediator, which is oxidized by the gas to be detected;
- a measuring electrode disposed in the container, said measuring electrode being made of an inert material;
- at least one additional electrode as a counterelectrode, said counterelectrode comprising an anodically oxidizable material permeable to said electrolyte;
- a separator impregnated with electrolyte, said counterelectrode being arranged behind said measuring electrode in said direction of diffusion in a sandwich arrangement with said separator present between said measuring electrode and said counterelectrode;
- and
- a reference electrode provided as an additional electrode.
Dependencies are inferred from the claim text.