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Technical characteristics of the sensors selected.
| Sensor | Chemicals Detected | Detection Scope | Accuracy (Maximum Value) | VH (V) | AH (mA) | RH (Ω) | PH (mW) |
|---|---|---|---|---|---|---|---|
| TGS-826 | ammonia and amines | (30–300) ppm | ± 12 ppm, 4% | 5 | < 167 | 30 | < 833 |
| MQ-135 | CO2 | (10–1,000) ppm | ± 20 ppm, 2% | 5 | < 151.5 | 33 | < 800 |
| MQ-3 | alcohol | (0.05–10) ppm | ± 0.2 ppm, 2% | 5 | < 151.5 | 33 | < 750 |
| MQ-138 | acetone | (5–500) ppm | ± 20 ppm, 4% | 5 | < 170 | 31 | < 850 |
