公开(公告)号：WO2014143175A1

公开(公告)日：2014-09-18

申请号：PCT/US2013/064739

申请日：2013-10-12

Applicant: MINE SAFETY APPLIANCES COMPANY

Inventor： SCHEFFLER, Towner Bennett ,  BROWN, Michael Alvin ,  DAVIS, Brian Keith ,  NALEPA, Andrew E.

IPC: G01N27/404 ,  G01N27/416 ,  G01N27/417 ,  G01N33/00 ,  G01N33/497

CPC classification number: G01N27/404 ,  G01N33/0006 ,  G01N33/007 ,  G01N33/497

Abstract: A method of testing a system (100) having at least one electrochemical gas sensor (100), such as an amperometric gas sensor, for detecting an analyte gas within a housing (102) of the system (100), the housing (102) having an inlet (104), the at least one electrochemical gas sensor (110) including an electrically active working electrode (150a) in fluid connection with the inlet (104) of the system (100), the method including biasing the electrically active working electrode (150a) at a first potential, to detect the analyte gas and biasing the electrically active working electrode (150a) at a second potential, different from the first potential, such that the at least one electrochemical gas sensor (110) is sensitive to a driving force created in the vicinity of the inlet (104) to test at least one transport path of the system (100). The method may further include creating the driving force in the vicinity of the inlet (104) of the housing (102) of the system (100) and measuring a response of the electrically active working electrode (150a) to the driving force. Said system (100) is therefore suitable for checking the performance of the electrochemical gas sensor (1), particularly to check that gas transport inside the system (100) is not prevented by diffusion blockage. The electrochemical gas sensor (110) is interrogated at bias voltages sensitive to different gas analytes, one being a target gas (e.g H2S) while the other being provided by, for instance, exhaled breath (e.g. C02).

Abstract translation: 一种测试系统（100）的方法，所述系统（100）具有用于检测所述系统（100）的壳体（102）内的分析物气体的至少一个电化学气体传感器（100），例如电流计气体传感器，所述壳体（102） 具有入口（104），所述至少一个电化学气体传感器（110）包括与所述系统（100）的入口（104）流体连接的电活动工作电极（150a），所述方法包括偏置所述电活动工作 电极（150a）处于第一电位，以检测分析物气体并将电活动工作电极（150a）偏置在与第一电位不同的第二电位，使得至少一个电化学气体传感器（110）对 在所述入口（104）附近产生的驱动力，以测试所述系统（100）的至少一个输送路径。 该方法还可以包括在系统（100）的壳体（102）的入口（104）附近产生驱动力并测量电活动工作电极（150a）对驱动力的响应。 因此，所述系统（100）适用于检查电化学气体传感器（1）的性能，特别是用于检查系统（100）内的气体传输不会被扩散阻塞所阻止。 电化学气体传感器（110）在对不同气体分析物敏感的偏置电压下被询问，一个是目标气体（例如H 2 S），而另一个由例如呼出气体（例如CO 2）提供。

公开(公告)号：WO2011053721A1

公开(公告)日：2011-05-05

申请号：PCT/US2010/054537

申请日：2010-10-28

Applicant: MINE SAFETY APPLIANCES COMPANY

Inventor： DAVIS, Brian Keith ,  SCHEFFLER, Towner Bennett ,  BROWN, Michael, Alvin

IPC: G01N33/00 ,  G01N27/413 ,  G01N27/40

CPC classification number: G01N33/004 ,  G01N27/40 ,  G01N27/413 ,  G01N33/0022 ,  G01N33/0044

Abstract: An electrochemical gas sensor includes a housing, a first working electrode within the housing and having a first section of gas transfer medium and a first layer of catalyst on the first section of gas transfer medium, and at least a second working electrode within the housing and having a second section of gas transfer medium and a second layer of catalyst on the second section of gas transfer medium. At least one of the first section of gas transfer medium and the second section of gas transfer medium includes at least one area in which the structure thereof has been irreversibly altered to limit diffusion of gas through the at least one of the first section of gas transfer medium or the second section of gas transfer medium toward the other of the at least one of the first section of gas transfer medium and the second section of gas transfer medium.

Abstract translation: 电化学气体传感器包括壳体，壳体内的第一工作电极，并且在气体转移介质的第一部分上具有气体转移介质的第一部分和第一催化剂层，以及在壳体内的至少第二工作电极， 在气体转移介质的第二部分上具有气体转移介质的第二部分和第二催化剂层。 气体转移介质的第一部分和气体转移介质的第二部分中的至少一个包括至少一个区域，其中其结构已被不可逆地改变，以限制气体通过第一部分气体传递中的至少一个的扩散 介质或第二部分的气体转移介质朝向气体转移介质的第一部分和气体转移介质的第二部分中的至少一个中的另一个。

公开(公告)号：EP2494347A1

公开(公告)日：2012-09-05

申请号：EP10776018.3

申请日：2010-10-28

Applicant: Mine Safety Appliances Company

Inventor： DAVIS, Brian Keith ,  SCHEFFLER, Towner Bennett ,  BROWN, Michael, Alvin

IPC: G01N33/00 ,  G01N27/413 ,  G01N27/40

CPC classification number: G01N33/004 ,  G01N27/40 ,  G01N27/413 ,  G01N33/0022 ,  G01N33/0044

Abstract: An electrochemical gas sensor includes a housing, a first working electrode within the housing and having a first section of gas transfer medium and a first layer of catalyst on the first section of gas transfer medium, and at least a second working electrode within the housing and having a second section of gas transfer medium and a second layer of catalyst on the second section of gas transfer medium. At least one of the first section of gas transfer medium and the second section of gas transfer medium includes at least one area in which the structure thereof has been irreversibly altered to limit diffusion of gas through the at least one of the first section of gas transfer medium or the second section of gas transfer medium toward the other of the at least one of the first section of gas transfer medium and the second section of gas transfer medium.