Patent ID: 8720186

Claim:
A control apparatus for a gas sensor which includes a cell composed of an oxygen-ion-conductive solid electrolyte body and a pair of electrodes provided thereon and which generates a sensor output corresponding to concentration of a specific gas, the control apparatus comprising: a voltage applicator that applies a single pulse voltage to the cell over a constant energization time; a first-output-value obtainer that obtains a first output value from the cell when a first time shorter than the constant energization time has elapsed after a start of application of the single pulse voltage; a second-output-value obtainer that obtains a second output value from the cell when a second time shorter than the constant energization time but longer than the first time has elapsed after the start of application of the single pulse voltage; and a deterioration-degree detector that detects a degree of deterioration of the cell based on a difference between the second output value and the first output value.