A study of resistance variation of SnO₂ gas sensor in ambient of propane-2-ol, methanol, acetone and methyl ketone

In the proposed paper an electrical configuration of data acquisition system to measure varying resistance of SnO₂ gas sensor in presence of varying concentration of gases like Propane-2-ol,Methanol, Acetone and Methyl Ketone is presented. The proposed circuit gives desired linear characteristics for varying concentration of gases. In the experimental measurement SnO₂ doped with Palladium shows highest sensitivity and SnO₂ doped with gold shows least sensitivity for all volatile organic compound (VOCs).