Patent ID: 8776578

Claim:
A gas sensor comprising a laminate which includes a plurality of electrodes and a plurality of thermistor layers, wherein one of the plurality of electrodes constitutes a catalytic electrode which is disposed at a surface of the laminate and catalyzes an exothermic or an endothermic reaction when coming into contact with a detection target gas, and a different one of the plurality of electrodes is an internal electrode which is disposed so that at least one of the plurality of thermistor layers is between the internal electrode and the catalytic electrode further comprising a hollow portion disposed in a portion of the laminate on the side of the internal electrode remote from the catalytic electrode, wherein at least two of the plurality of electrodes are temperature compensating internal electrodes which are disposed so that at least one of the plurality of thermistor layers is disposed therebetween and not thermally coupled with the catalytic electrode.