| Without Mask | With Mask |
---|---|---|
PM2.5, μg/m3 | 86 (52 – 120) | 140 (77 – 203) |
Particle count, number/cm3 | 24184 (22061 – 26306) | 23379 (21350 – 25409) |
CO, number of peaks | 6.2 (3.2 – 9.3) | 3.3 (1.3 – 5.2) |
NO2, number of peaks | Nil | Nil |
SO2, number of peaks | Nil | Nil |
Temperature, °c | 29.2 (28.6 – 29.8) | 28.1 (26.3 – 29.9) |
Relative humidity, % | 63 (58 – 68) | 64 (53 – 74) |