Patent ID: 8860439

Claim:
A detecting device that detects an amount of particulate matter included in a gas to be measured, the detecting device comprising: a detection section having a pair of detection electrodes, the detection electrodes formed on a surface of an insulating substrate to oppose each other with space therebetween, the particulate matter accumulated between the detection electrodes forming an electrical resistance to be detected; a capacitance component having a dielectric layer and a pair of plate conductors formed on opposite sides of the dielectric layer to oppose each other with the dielectric layer therebetween, the dielectric layer being formed from insulating ceramic, the capacitance component being electrically connected in parallel with the detection electrodes such that a voltage is between the pair of detection electrodes and between the pair of plate conductors; a detection circuit having an alternating-current power source that supplies an alternating current to a detection element having the detection electrodes and the capacitance component and an alternating-current detector that detects the alternating current flowing through the detection element.