Table 2.

Instruments for indoor air quality assessment for the Taipei Rapid Transit System (TRTS).

Iterm	Equipment	Company	Analytical Principle	Detectable Range	Resolution	Calibration
CO	PPMonitor SAS monitor	PPM Technology Ltd., Caernarfon, UK	Non-Dispersion Infrared Detector	0–100 ppm	0.1 ppm	100.4 ppm
CO2	PPMonitor SAS Monitor	PPM Technology Ltd., Caernarfon, UK	Electrochemical	0–5000 ppm	1 ppm	2018 ppm
Humidity	PPMonitor SAS Monitor	PPM Technology Ltd., Caernarfon, UK	CMOSens Technology	0%–100%	0.01%	100%
Temperature	PPMonitor SAS Monitor	PPM Technology Ltd., Caernarfon, UK	CMOSens Technology	−40 °C–128 °C	0.01 °C	100 °C
O3	PPMonitor SAS Monitor	PPM Technology Ltd., Caernarfon, UK	Electrochemical	0–1 ppm	0.01 ppm	1.02 ppm
PM10	DUSTTRAK Aerosol Monitor 852	TSI Inc., Shoreview, MN, USA	Laser Photometer	0.001–100 mg/m3	0.001 mg/m3	0 mg/m3
PM2.5	DUSTTRAK Aerosol Monitor 852	TSI Inc., Shoreview, MN, USA	Laser Photometer	0.001–100 mg/m3	0.001 mg/m3	0 mg/m3
HCHO	PPMonitor SAS Monitor	PPM Technology Ltd., Caernarfon, UK	Electrochemical	0–10 ppm	0.001 ppm	2.51 ppm
TVOCs	RAE PGM-7240	RAE Systems, San Jose, CA, USA	Photoionization	0–10,000 ppb	1 ppb	10,000 ppb
Bacteria	SKC Biostage	SKC Inc., Covington, GA, USA	Impaction and Culture	-	-	-
Fungi	SKC Biostage	SKC Inc., Covington, GA, USA	Impaction and Culture	-	-	-

CO, carbon monoxide; CO₂, carbon dioxide; O₃, ozone; PM, particulate matter; HCHO, formaldehyde; TVOCs, total volatile organic compounds.