Interrogation and output correction of capillary-limited oxygen sensors

A gas detection device, comprising:

• a control system including a processor system and a memory system, and
• an electrochemical sensor analytically responsive to oxygen comprising a housing comprising a capillary via which gas diffuses into the housing from an environment, a working electrode within the housing in operative connection with the control system, a counter electrode within the housing in operative connection with the control system, and an electrolyte within the housing in ionic contact with the working electrode and the counter electrode,
• the control system being configured, via execution of software stored in the memory system by the processor system, to apply an electrical signal to the electrochemical sensor to generate a current flow between the working electrode and the counter electrode via the electrolyte;
• to measure a parameter of a response of the electrochemical sensor to the electric signal, to compare the measured parameter to a predetermined characterization of the parameter, wherein the predetermined characterization of the parameter provides a relationship between the parameter and a response of the electrochemical sensor over varying state of the electrochemical sensor;
• and to determine an output value of the gas detection device from the analytical response electrochemical sensor in sensing oxygen in the ambient environment and the comparison of the measured parameter to the predetermined characterization.