Abstract: The invention is directed to an electrochemical measuring cell for detecting gaseous components with an electrolyte which is disposed between a counter electrode and a measuring electrode provided with gas permeable pores. The pores are configured as channels partially or completely filled with the electrolyte and these channels have a diameter which does not exceed 10 micrometers with a channel length of up to 300 micrometers and a web thickness of not more than 5 micrometers. With this configuration, drift and memory effects are suppressed and the measuring sensitivity is increased and, on the other hand, the response time and the residual current are reduced. When the measuring cell is used as a dosimeter, the counter electrode and the measuring electrode are decoupled with respect to a mass transport in the electrolyte.

Abstract: The invention is directed to a dosimeter for detecting gaseous substances or substances dissolved in liquids. The dosimeter includes a detection chamber which is partitioned off with respect to the ambient by a membrane which is permeable to the substance to be detected. The detection chamber is filled with an electrolyte which is subjected to changes in its characteristic under the action of the substance to be detected and these changes can be evaluated as electrical measured values via appropriate electrodes. The electrolyte contains a reagent which goes into an irreversible reaction with the substance to be detected and the dosimeter is improved so that after the evaluation it can be used again for measuring tasks or for collecting the substance to be detected. Furthermore, a calibration or a function test can be carried out on each dosimeter without its measurement readiness being limited thereby.