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Sensitivity of flame-made undoped ZnO nanoparticles towards different concentrations of NO2, C2H5OH and SO2 gases under the operating temperature of 300 °C.
| Gas concentration | Sensitivity |
|---|---|
| 1, 5, 10, 20, 30 and 50 ppm of NO2 | 2.7, 6.2, 11.8, 18.5, 26.7 and 33 |
| 100 ppm of SO2 | 2.8 |
| 200,300, and 500 ppm of ethanol | 18.2, 22.4 and 27.5 |
