Pd-Doped SnO₂-Based Sensor Detecting Characteristic Fault Hydrocarbon Gases in Transformer Oil

Figure 11

Response and recovery property of the 5 wt% Pd²⁺-doped sensor to 50 μL/L of CH₄, C₂H₆, C₂H₄, and C₂H₂ (room temperature at 25°C and relative humidity as 60%).