Detection of CO Levels by Semiconductor Gas Sensors in Combustion Gases Containing NO

Abstract

Responses of SnO₂-based semiconductor gas sensors were measured in combustion processes where wood chips, light oil and peat were used as fuels respectively. The concentrations of oxygen, carbon monoxide, carbon dioxide and oxides of nitrogen were monitored simultaneously with reference analyzers. The semiconductor type gas sensor was found to detect CO concentration of combustion gases very well in all the three combustion processes in spite of compositions of combustion gases in each case being different.