Figure 1.
Figure 2.
Concentration of PM2_5 obtained by using the Grimm instrument, the low-cost sensor and the SKC sampler (gravimetric method)_ Source: [23]
| Day | Concentration of PM2.5, µg m-3 | ΔGrimm% | ΔSensor% | ||
|---|---|---|---|---|---|
| Grimm | Sensor | Grav. (SKC) | |||
| 27.10.2017 | 4.0 | 15.0 | 12.4 | 67.7 | 21.0 |
| 8.11.2017 | 8.3 | 30.0 | 17.3 | 52.0 | 73.4 |
| 22.11.2017 | 12.3 | 39.0 | 18.3 | 32.8 | 113.1 |
| 17.12.2017 | 37.1 | 51.2 | 27.5 | 34.9 | 86.2 |
| 4.01.2018 | 5.1 | 13.0 | 10.4 | 51.0 | 25.0 |
| 7.01.2018 | 23.9 | 57.2 | 24.1 | 0.8 | 137.3 |
| 14.01.2018 | 2.8 | 11.5 | 4.2 | 33.31 | 173.8 |
| 20.01.2018 | 17.5 | 48.5 | 23.0 | 23.9 | 110.9 |
| 28.01.2018 | 41.1 | 117.6 | 46.6 | 11.8 | 152.4 |
| 3.03.2018 | 21.5 | 64.3 | 31.0 | 30.6 | 107.4 |
| Arithmetic mean | 17.4 | 44.7 | 21.4 | 33.9 | 100.1 |
Contribution of airborne particles with a diameter between 1 and 2_5 µm to the mass concentration of PM2_5 indicated by the Grimm instrument and the low-cost sensor
| Day | Concentration of airborne particles, µg m-3 | PM2.5-PM1 | ||||
|---|---|---|---|---|---|---|
| PM1 | PM2.5 | PM2.5 | ||||
| Grimm | Sensor | Grimm | Sensor | Sensor | Grimm | |
| 27.10.2017 | 3.4 | 11.0 | 4.0 | 15.0 | 26.7 | 15.0 |
| 30.10.2017 | 1.0 | 3.0 | 1.4 | 4.0 | 25.0 | 28.6 |
| 3.11.2017 | 2.9 | 11.1 | 3.5 | 15.0 | 26.0 | 17.1 |
| 8.11.2017 | 7.6 | 19.0 | 8.3 | 31.1 | 38.9 | 8.4 |
| 21.11.2017 | 5.5 | 15.8 | 6.1 | 22.0 | 31.8 | 9.8 |
| 22.11.2017 | 11.3 | 28.0 | 12.3 | 39.0 | 28.2 | 8.1 |
| 17.12.2017 | 33.4 | 33.3 | 37.1 | 51.2 | 35.0 | 10.0 |
| 4.01.2018 | 4.5 | 9.3 | 5.1 | 13.0 | 28.5 | 11.8 |
| 7.01.2018 | 21.9 | 39.2 | 23.9 | 57.2 | 31.5 | 8.4 |
| 14.01.2018 | 2.6 | 9.0 | 2.8 | 11.5 | 21.7 | 7.1 |
| 20.01.2018 | 15.8 | 34.0 | 17.5 | 48.5 | 29.9 | 9.7 |
| 28.01.2018 | 38.8 | 74.5 | 41.1 | 117.6 | 36.6 | 5.6 |
| 3.03.2018 | 18.1 | 43.1 | 21.5 | 64.3 | 33.0 | 5.8 |
| Arithmetic Mean | 12.8 | 25.3 | 14.2 | 37.6 | 30.2 | 11.2 |