| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for easily judging the deterioration of an electrochemical carbon monoxide gas sensor and calibrating the sensor without using a calibrating gas. SOLUTION: In a method for judging the deterioration of an electrochemical carbon monoxide gas sensor which comprises a working electrode for oxidizing a carbon monoxide gas component to be detected, a paired electrode reducing oxygen according to the amount of carbon monoxide oxidized, and an aqueous solution-based electrolyte for reacting them together, and which detects the carbon monoxide concentration from the value of the oxidation current of the carbon monoxide, a voltage is applied between the working electrode and the paired electrode from the outside, hydrogen is generated in the working electrode by electrolysis of the electrolyte water content, and either a sensor output based on the hydrogen concentration or the hydrogen concentration calculated from the sensor output is compared with a reference sensor output or hydrogen concentration so as to judge the deterioration of the sensor. |
