Electrochemical measuring cell having a gas-permeable housing

摘要

The invention is directed to an electrochemical measuring cell for detecting gaseous constituents in air. The measuring cell includes a measuring electrode and a counter electrode accommodated in a housing. The housing includes an electrolyte chamber and the electrolyte is in liquid contact with the electrodes. The measuring electrode is in diffusion contact with the gas constituents to be detected via a gas-permeable membrane which is impermeable to the electrolyte. The measuring cell is improved so that an effective pressure equalization between the electrolyte chamber and the ambient is made possible in the context of a simple assembly of the housing. For this purpose, the housing jacket surrounding the electrolyte chamber has at least one breakthrough. The electrolyte chamber is separated from the ambient by a gas-permeable stop disposed in the breakthrough. This stop is impermeable to the electrolyte.