| 摘要 |
The present invention provides a gas detection apparatus (10), which uses a gas sensor element (11) whose sensor resistance (Rs) changes in accordance with the concentration of an oxidative gas, obtains a sensor output value (S(n)) corresponding to the sensor resistance (Rs), and performs predetermined processing to thereby generate a low concentration signal or a high concentration signal in accordance with changes in the concentration of the oxidative gas. When the detection sensitivity for an increase in the concentration of the oxidative gas drops stemming from a hysteresis phenomenon caused by adsorption of gas molecules to the gas sensor element (11), a sensitized period, in which the high concentration threshold is lowered, is provided, whereby an increase in gas concentration can be detected on the basis of a slight increase in the sensor output value. <IMAGE> |
