Table 1
Measured environmental variables, instruments and accuracy of instruments and
sensors.
Variable Symbol Unit Instrument Accuracy
Air temperature Ta C Campbell HMP45C-type ±0.2 C
Relative humidity RH % Campbell HMP45C-type ±2%
Wind direction Wd degree Young 05103 anemographs 3
Wind velocity Ws m/s Young 05103 anemographs ±0.3 m/s
Global radiation Gr w/m2 Kipp&Zonen pyranometer
CMP6
±0.075 w/m2
Net Radiation Nr w/m2 Siemens-Erskine,
Frederickssund
5%
Carbon monoxide CO ppm Drager Pac III sensors 1 ppm
Nitrogen oxide NOx ppb 42C NOeNO2eNOx
Monitor Labs 9841A
±0.4 ppb
Respiratory
particles
matters
PM10 mg/m3 TEOM1400AB ±1.5 mG/m3
Ozone O3 ppb TEi 49C 1 ppb
Noise Leq dBA Quest pro DL dosimeter 0.1 dB