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NO2: Nitrogen dioxide

NO2 at very high concentration Typical background concentration: 5 ppb

Conversion mixing ratio to mass density (1 atm, 25 ºC): 1 ppb = 1.88 μg/m³

Air quality standards in Europe (in μg/m³):

limit value alert threshold
hourly average 200 1) 400 2)
daily average
annual average 40

Active sensors

Passive samplers

Sensor boxes containing NO2 sensors

1) max. 18 hours of exceeding this limit value allowed per year
2) When exceeded for 3 consecutive hours in an area of at least 100 km2.
no2.txt · Last modified: 15-01-2018 13:33 by admin