Table 1.
The 1-min mean PM2.5 concentration, the Pearson r, the mean absolute error (MAE), and the coefficient of variation of the mean absolute error (CvMAE) of the six project Air Quality Egg (EGG) lost-cost sensors that were co-located at Kensington Park (Figure 2) prior to the study period. The EGG 4 and EGG 6 sensors were later deployed to the facility inside the ground floor lobby and outside a second-floor window, respectively. However, EGG 6 failed shortly after the beginning of the study period.
| Mean PM2.5 (µg/m3) |
Pearson r | Mean MAE (µg/m3) |
Mean CvMAE | |
|---|---|---|---|---|
| EGG 1 | 5.92 | 0.82 | 2.70 | 0.50 |
| EGG 2 | 13.77 | 0.73 | 4.88 | 0.91 |
| EGG 3 | 5.82 | 0.83 | 2.61 | 0.48 |
| EGG 4 | 7.21 | 0.78 | 3.01 | 0.56 |
| EGG 5 | 6.95 | 0.83 | 2.66 | 0.49 |
| EGG 6 | 6.21 | 0.82 | 2.73 | 0.51 |