Table 2.
Characteristics of sensors.
| No. | Sensor Name | Sensitive Gas | Detection Range (mg/L) |
|---|---|---|---|
| 1 | TGS-825 | Hydrogen sulfide | 5–100 |
| 2 | TGS-831 | R-21 and R-22 | 100–3000 |
| 3 | TGS-821 | hydrogen | 30–1000 |
| 4 | TGS-822 | Ethanol | 50–5000 |
| 5 | TGS-813 | Methane, Propane and Butane | 500–10,000 |
| 6 | TGS-832 | R-134a | 100–3000 |
| 7 | TGS-826 | Ammonia | 30–300 |
| 8 | TGS-830 | R-113, hydrogen and Ethanol | 100–3000 |
| 9 | MQ-2 | Ethanol, Propane and hydrogen | 300–10,000 |
| 10 | MQ-4 | Alkanes | 300–10,000 |
| 11 | MQ-3 | Ethanol | 40–4000 |
| 12 | MQ-135 | Hydrogen, R-113 and Ethanol | 10–1000 |
| 13 | MP-4 | Methane | 300–10,000 |
| 14 | MP-135 | hydrogen | 30–1000 |
| 15 | MQ-6 | Isobutane, Propane and LPG | 300–10,000 |
| 16 | MQ-5 | Methylpropane | 300–10,000 |