| 摘要 |
PROBLEM TO BE SOLVED: To correctly determine the level of carbon monoxide from the output voltage of a carbon monoxide sensor using a solid electrolyte body having a temperature characteristic. SOLUTION: The waveform of the output of an amplifier 8 amplifying a voltage between electrodes 2, 3 installed on a solid electrolyte plate 1 of a carbon monoxide sensor element part 7 is analyzed by a voltage waveform monitoring means 11, and a control voltage corresponding to a sensor working temperature is selected according to the waveform by switching between comparative voltage generating means 13a, 13b by means of a selector switch 11, thereby enhancing the detection accuracy of a sensor control circuit using a solid electrolyte having a temperature characteristic. |
