Early detection of fires in electrical installations by thermally modulated SnO2/additive-multi sensor arrays

In this work, a setup for generation and analysis of pyrolysis gases, which can operate multi gas sensor arrays of different SnO2/Additive admixtures, is introduced. The gas sensor arrays are thermo-cyclically operated and are investigated towards their characteristic features of the resulting conductance-over-time profiles (CTPs) for identification and analysis of pyrolysis gases at low concentrations emitted for instance by overloaded electrical cables. Several SnO2/Additive gas sensitive layers have been examined with pyrolysis gas related model gases like CO, methane and propene and were tested on their stability, sensitivity and characteristic CTP-features when exposed to pyrolysis gases of PVC insulation materials.