Patent ID: 8516880

Claim:
A gas sensing system, comprising: a gas sensing unit, comprising: a quartz crystal substrate comprising a first surface and a second surface at an opposite side thereof to the first surface; a first electrode layer formed on the first surface; a second electrode layer formed on the second surface; a first activating layer formed on the first electrode layer, the first activating layer essentially consisting of cupric oxide; and a first sensor medium layer formed on the first activating layer, the first sensor medium layer consisting of one-dimensional nanomaterial which comprises iridium dioxide and iridium, the first activating layer being configured for activating the first sensor medium layer, the first sensor medium layer being configured for adsorbing a chemical gas; a detecting unit electrically coupled to the first electrode layer and the second electrode layer, the detecting unit being configured for detecting a frequency change of the gas sensing unit before and after adsorbing the chemical gas; and a processing unit electrically connected to the detecting unit, the processing unit being configured for determining a mass change of the gas sensing unit before and after adsorbing the chemical gas according to the frequency change.