Conversion factors for gases - AQT530

Conversion from ppb to µg/m³ is calculated with the following formula:

µg/m³ = ppb * conversion_factor

Table 1. Conversion factors for conversion from ppb to µg/m³

Gas	Conversion factor
NO2	1.912
SO2	2.66
CO	1.16
H2S	1.417
O3	2.00
NO	1.247

The conversion assumes a temperature of +20 °C (+68 °F) (European standard).