This table was updated on 06 October 2020 and refers to the new ISO 17034 scope for EffecTech in the UK only (Issue No. 001).

For the most up-to-date information, see EffecTech’s ISO 17034 scope.

Binary Emission Gas Mixturesamount fraction range (mol/mol)
carbon monoxide10 ppm to 1000 ppm
carbon dioxide0.1% to 15%
oxygen0.5% to 25%
nitric oxide10 ppm to 600 ppm
nitrogen dioxide5 ppm to 500 ppm
sulphur dioxide10 ppm to 1000 ppm
methane (in nitrogen)0.1% to 5%
methane (in synthetic air)0.1% to 2.5%
Oxygen Gas Mixtures 
oxygen in natural gas mixtures or nitrogen10 ppm to 22.5%