SOx gas sensor and method of measuring concentration of SOx gas

摘要

An SO x gas sensor includes a first solid electrolyte member composing a part of a wall of a gas reduction chamber and provided with a first gas introducing hole for introducing sample gas into the gas reduction chamber, an oxidation part for oxidizing noise gas other than the SO x gas in the sample gas, and a reduction mechanism for reducing the SO x gas in the sample gas, in the gas reduction chamber; a communication unit provided with a second gas introducing hole for introducing the sample gas into a gas measurement chamber from the gas reduction chamber; and a second solid electrolyte member composing a part of a wall of the gas measurement chamber and provided with an oxidation mechanism for oxidizing the SO x gas, and a measurement mechanism for measuring the concentration of the SO x gas, in the gas measurement chamber.