Spatial Extent and Distribution of Ambient Airborne Particulate Matter (PM_2.5) in Selected Land Use Sites in Nairobi, Kenya

Table 2

Average standard gravimetric measurement and sensor-based averages of different PMS7005 sensors and their scaling factors.

Average gravimetric concentrations (μg/m³)	Sensors	Average sensor concentrations (μg/m³)	Scaling factor
20.70 ± 4.12	PMS7003Z	16.23 ± 9.27	1.28 ± 0.74
	PMS7003N	18.92 ± 10.62	1.09 ± 0.58
	PMS7003M	15.78 ± 8.47	1.31 ± 0.78
	PMS7003A	18.37 ± 9.80	1.13 ± 0.60
	PMS7003C	14.16 ± 3.61	1.46 ± 0.93
	PMS7003D	17.60 ± 10.13	1.18 ± 0.65
	PMS7003L	18.87 ± 9.17	1.10 ± 0.58
	PMS7003I	17.33 ± 11.13	1.19 ± 0.66

Note: the letters Z, N, a, K, A, C, D, L, and I are used to differentiate the sensors since they are the same model (PMS7003).