Combustible gas sensor and method for identifying combustible gas species by pulse operation of combustible gas sensor

摘要

A combustible gas sensor includes a catalyst and a first sensing element that is operatively connected to the catalyst and that heats the catalyst above a temperature for burning a target gas test substance. And a catalyst that catalyzes oxidative combustion of the target test substance and a temperature exceeding a temperature at which the target test substance is combusted. An electrical circuit that circulates the first sensing element periodically between a temperature at which the activity is substantially eliminated. The electrical circuit is configured to determine at least one species of the gas test substance of interest from a first output of the combustible gas sensor during an ON time within a cycle period. The electrical circuit is further configured to determine a concentration of the gas species from a second output of the combustible gas sensor. [Selection] Figure 3A