Enhancing PM_2.5 Measurement Accuracy: Insights from Environmental Factors and BAM-Light Scattering Device Correlation

Table 4

Accuracy of the measurement method by devices.

Symbol	Definition	Accuracy of the measurement method
PM2.5
PM2.5	PM2.5 measurement value	Exceeds US-EPA Class III PM2.5 FEM standards for additive and multiplicative bias
Temperature
	Outdoor temperature	Metal sheath type of platinum resistance thermometer
-	Outdoor (temperature–dew point temperature)	Includes temperature and relative humidity errors
Relative humidity
RH	Outdoor relative humidity	1% @ 10–95%
Wind
WS	Wind speed	Uses the average of 10 min
WD	Wind direction	Uses the average of 10 min
Other elements
	Pressure	±0.1 hPa
	Precipitation