Air Pollution Monitoring and Control System for Subway Stations Using Environmental Sensors

Table 1

Specifications of PM measuring instruments.

Instrument	Ebam	Esampler	HCT-PM326
Method	β-ray absorption	Light scattering	Light scattering
Range	0~100 mg/m^3	0~65 mg/m^3	0~1 mg/m^3
Sampling flow rate	16.7 L/min	2 L/min	0.8 L/min
Sampling period	60 min	1 sec	6 sec