Patent ID: 9410940
Filing Date: 2016-08-09
CPC Classification: G01N

Claim Text:
1. A method of testing a system having at least one electrochemical sensor for detecting an analyte gas within a housing of the system, the housing of the system having an inlet, a second electrochemical sensor within the housing sensitive to a change in concentration of a chemical species other than the analyte gas, and one or more porous diffusion barriers through which gas diffuses but through which liquid has limited mobility, the at least one electrochemical sensor and the second electrochemical sensor being positioned within the housing of the system so that the one or more porous diffusion barriers are between an environment outside of the inlet and the at least one electrochemical sensor and the second electrochemical sensor, comprising: exhaling in the vicinity of the inlet of the housing of the system to change the concentration of the chemical species other than the analyte gas within the housing; measuring with the second electrochemical sensor a change in the concentration of the chemical species other than the analyte gas in response to the exhaled breath to test one or more transport paths of the system through each of the one or more diffusion barriers between the inlet of the system and the at least one electrochemical sensor and the second electrochemical sensor; simulating the presence of the analyte gas electronically; and measuring a response of the electrochemical sensor to the electronic simulation.