... electricity quantity and intelligent charging protectionTechnical parametersSingle extent analyzerH20~100% (background is single gas or composite gas with steady thermal conductivity ... , such as air, N2, O2,CO2, etc. )CO20~100% (background gas is single gas or composite gas with steady thermal ... gas, such as air, N2, O2, etc.)O295~100% (background gas is H2) Other two kinds of gases with relatively ...