Table 3.

Summary of the gas sensing properties of ITO, shown in Figure 8. The equation column shows the best-fit lines for the sensitivity of the thin film (solid lines in Figure 8).

Reacting Gas	Temperature	Equation	Concentration
Ethanol (C2H5OH) [35]	350 °C	17.7 · ln(Cppm + 162.6) – 90.2	<600 ppm
Acetone ((CH3)2CO) [35]	350 °C	5.14 · ln(Cppm + 17.4) – 14.5
Nitrogen dioxide (NO2) [35]	280 °C	18.5 · ln(Cppm + 250) – 102