Abstract
Reliable detection of low level toxic gas impurities in breathing air is one of the challenging tasks in Dräger products. Among our detector portfolio electrochemical sensors belong to our key technology, which we try to improve continuously in terms of sensitivity, selectivity and stability. Ionic Liquids offer the advantages of displaying a huge electrochemical open window with negligible background currents. They can be designed task specific for the application they are used in and besides outstanding chemical inertness they offer the intrinsic advantage of being nonvolatile, which makes it possible to construct sensors that even can be used under zero humidity conditions which e.g. can be found for H2S monitoring in deserts e.g. in oil fields.