| 摘要 |
<p>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).</p> |
