Table 1.
List of measurements and sensors’ specifications.
| Symbol | Parameter | Units | Range | Accuracy | Resolution |
|---|---|---|---|---|---|
| Meteorological data (VAISALA WXT536) | |||||
| Operating Voltage: 6–24 VDC, Average current consumption: 3.5 mA at 12 VDC, Protection Class: IP66, Dimensions (bird spike kit excluded): 115(w) × 238(h) × 115(d) mm, Weight: 0.7 kg | |||||
| T | Temperature | °C | −52–60 | ± 0.3 | 0.1 |
| RH | Relative Humidity | % | 0–100 | ± 3 at 0–90% ± 5 at 90–100% | 0.1 |
| p | Air Pressure | hPa | 600–1100 | ± 0.5 at 0–30 °C ± 1 at −52–0, 30–60 °C | 0.1 |
| ws | Wind speed | m/s | 0–60 | ± 3% at 10 m/s | 0.1 |
| wd | Wind direction | ° | 0–360 | ± 3.0 at 10 m/s | 1 |
| Rain | Rainfall rate | mm/h | 0–200 | n.s. | 0.1 |
| Air pollutants (VAISALA AQT420) | |||||
| Operating Voltage: 8-30 VDC, Average power consumption: 0.5 W, Protection Class: IP65, Dimensions: 128(w)× 185(h) × 128(d) mm, Weight: 1.25 kg | |||||
| SO2 | Sulphur dioxide (SO2) | ppm | 0–2 | ± 0.05 * | n.s. |
| CO | Carbon monoxide (CO) | ppm | 0–10 | ± 0.2 * | n.s. |
| NO2 | Nitrogen dioxide (NO2) | ppm | 0–2 | ± 0.025 * | n.s. |
| O3 | Ozone (O3) | ppm | 0–2 | ± 0.06 * | n.s. |
| PM10 | Particles less than 10 µm in diameter (PM10) | µg/m3 | 0–5000 | n.s. | 0.1 |
| PM25 | Particles less than 2.5 µm in diameter (PM2.5) | µg/m3 | 0–2000 | n.s. | 0.1 |
*90% confidence interval in comparing with reference instrument, includes T and RH dependence in typical field conditions and sensor drift during calibration interval.