Dräger Safety Ag&co. Kgaa

Gregor Steiner

Frank Mett

Rigobert Chrzan

Andreas Nauber

Michael Sick

Marie-Isabell Mattern-Frühwald

Sabrina Sommer

Andreas Hengstenberg

Sabrina Pilz

A liquid electrolyte, for an electrochemical gas sensor for detecting NHor gas mixtures containing NH, contains at least one solvent, one conductive salt and/or one organic mediator. The conductive salt is an ionic liquid, an inorganic salt, an organic salt or a mixture thereof. The electrolyte preferably is comprised of (I) water, propylene carbonate, ethylene carbonate or a mixture thereof as solvent; (ii) LiCl, KCl, tetrabutylammonium toluenesulphonate or 1-hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate as conductive salt; and (iii) tert-butylhydroquinone or anthraquinone-2-sulphonate as organic mediator.

Liquid electrolyte for an electrochemical gas sensor

An electrochemical gas sensor () has a housing (), a working electrode (), a counterelectrode () and a reference electrode (). The housing () has an electrolyte reservoir (), a gas inlet orifice () and at least one gas outlet orifice (). The electrolyte reservoir () is filled with a liquid electrolyte (). The gas sensor () has a counterelectrode carrier (). The counterelectrode () is suspended on the counterelectrode carrier () in such a way that the counterelectrode () is suspended in the electrolyte reservoir () and the electrolyte () flows around the counterelectrode () on all sides. Preferably, the electrolyte includes (I) a solvent, e.g. water, propylene carbonate, ethylene carbonate or mixtures thereof; (ii) a conductive salt, especially an ionic liquid; and/or (iii) an organic mediator, for example substituted quinones, anthraquinones, etc.

Electrochemical gas sensor, liquid electrolyte and use of a liquid electrolyte in an electrochemical gas sensor

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Titisee-Neustadt, Germany

Gregor Steiner