公开(公告)号：US11668669B2

公开(公告)日：2023-06-06

申请号：US16087368

申请日：2017-03-21

申请人： Dräger Safety AG & Co. KGaA

发明人： Rigobert Chrzan ,  Rolf Eckhardt ,  Andreas Nauber ,  Susanne Schaefer ,  Michael Sick

IPC分类号： G01N27/404 ,  G01N27/416

CPC分类号： G01N27/404 ,  G01N27/416

摘要： An electrochemical gas sensor measures gaseous components in an air/gas mixture. A measuring electrode and a counterelectrode, with an electrolyte located therebetween, are arranged in the sensor housing. A diffusion barrier is configured to set a gas flow of the gas intended for the concentration determination to the measuring electrode from a surrounding area. The diffusion barrier is located in the sensor housing. At least one gas-permeable, hydrophobic pressure absorption element covers the diffusion barrier and is provided between the diffusion barrier and the measuring electrode, in the interior of the sensor housing and on an inner surface of the sensor housing. The inner surface has a mean roughness depth Rz that is lower than or equal to 2 μm at least in an area on which the pressure absorption element lies.

公开(公告)号：US10175191B2

公开(公告)日：2019-01-08

申请号：US14889968

申请日：2014-09-01

申请人： Dräger Safety AG & Co. KGaA

发明人： Andreas Nauber ,  Michael Sick ,  Gregor Steiner ,  Marie-Isabell Mattern-Frühwald ,  Frank Mett ,  Rigobert Chrzan ,  Sabrina Sommer

IPC分类号： G01N27/404 ,  G01N27/30 ,  G01N27/413 ,  G01N33/00

摘要： An electrochemical gas sensor (10) has a housing (20), a working electrode (51), a counterelectrode (52) and a reference electrode (53). The housing (20) has an electrolyte reservoir (30), a gas inlet orifice (21) and at least one gas outlet orifice (22). The electrolyte reservoir (30) is filled with a liquid electrolyte (40). The gas sensor (10) has a counterelectrode carrier (26). The counterelectrode (52) is suspended on the counterelectrode carrier (26) in such a way that the counterelectrode (52) is suspended in the electrolyte reservoir (30) and the electrolyte (40) flows around the counterelectrode (52) 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.

公开(公告)号：US10969361B2

公开(公告)日：2021-04-06

申请号：US16206032

申请日：2018-11-30

申请人： Dräger Safety AG & Co. KGaA

发明人： Andreas Nauber ,  Michael Sick ,  Gregor Steiner ,  Marie-Isabell Mattern-Frühwald ,  Frank Mett ,  Rigobert Chrzan ,  Sabrina Pilz

IPC分类号： G01N27/404 ,  H01G11/58 ,  G01N27/30 ,  G01N27/413 ,  G01N33/00 ,  H01G9/035

摘要： An electrochemical gas sensor (10) has a housing (20), a working electrode (51), a counterelectrode (52) and a reference electrode (53). The housing (20) has an electrolyte reservoir (30), a gas inlet orifice (21) and at least one gas outlet orifice (22). The electrolyte reservoir (30) is filled with a liquid electrolyte (40). The gas sensor (10) has a counterelectrode carrier (26). The counterelectrode (52) is suspended on the counterelectrode carrier (26) in such a way that the counterelectrode (52) is suspended in the electrolyte reservoir (30) and the electrolyte (40) flows around the counterelectrode (52) 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.

公开(公告)号：US10883958B2

公开(公告)日：2021-01-05

申请号：US14890757

申请日：2014-09-01

申请人： Dräger Safety AG & Co. KGaA

发明人： Andreas Nauber ,  Michael Sick ,  Gregor Steiner ,  Marie-Isabell Mattern-Frühwald ,  Rigobert Chrzan ,  Sabrina Sommer ,  Frank Mett ,  Andreas Hengstenberg

IPC分类号： G01N27/404 ,  G01N33/00

摘要： A liquid electrolyte, for an electrochemical gas sensor for detecting NH3 or gas mixtures containing NH3, 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.

公开(公告)号：US11828720B2

公开(公告)日：2023-11-28

申请号：US17109880

申请日：2020-12-02

申请人： Dräger Safety AG & Co. KGaA

发明人： Andreas Nauber ,  Michael Sick ,  Gregor Steiner ,  Marie-Isabell Mattern-Frühwald ,  Rigobert Chrzan ,  Sabrina Sommer ,  Frank Mett ,  Andreas Hengstenberg

IPC分类号： G01N27/404 ,  G01N33/00

CPC分类号： G01N27/4045 ,  G01N33/0054 ,  Y02A50/20

摘要： A liquid electrolyte, for an electrochemical gas sensor for detecting NH3 or gas mixtures containing NH3, 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.