This table was updated on 26 February 2020 and refers to the scope for EffecTech in the UK only (Issue No. 052). 

For the most up-to-date information, as well as the scopes for EffecTech Gases PvT Ltd (India) and EffecTech Qatar, see EffecTech’s ISO 17025 scope.

Primary Reference Gas Mixtures (PRGM)
Component Range Calibration and Measurement Capability (CMC)*
amount fraction (mol/mol) amount fraction (mol/mol)
carbon monoxide in nitrogen 10 ppm to 100 ppm 0.13 % relative + 0.3 ppm
100 ppm to 1000 ppm 0.40 % relative
carbon dioxide in nitrogen 0.1 % to 5 % 0.25 % + 7.5 ppm
5 to 15 % 0.10 % relative + 85 ppm
oxygen in nitrogen 10 ppm to 100 ppm 0.80 % relative + 0.1 ppm
100 ppm to 1000 ppm 0.45 % relative + 0.25 ppm
0.1 % to 1.0 % 0.35 % relative +0.5 ppm
1.0 % to 22.5 % 0.10 % relative + 15 ppm
nitric oxide in nitrogen 10 ppm to 60 ppm 0.10 % relative + 0.13 ppm
60 ppm to 600 ppm 0.20 % relative + 0.07 ppm
nitrogen dioxide in synthetic air 5 ppm to 500 ppm 2.0 % relative
sulphur dioxide in nitrogen 10 ppm to 200 ppm 0.10 % relative + 0.5 ppm
200 ppm to 1000 ppm 0.30 % relative + 0.1 ppm
methane in nitrogen 0.1 % to 2 % 0.18 % relative + 5 ppm
2 % to 5 % 0.10 % relative + 25 ppm
methane in synthetic air 0.1 % to 2 % 0.18 % relative + 5 ppm
2 % to 2.5 % 0.10 % relative + 25 ppm
propane in nitrogen 1 ppm to 1000 ppm 0.40 % relative + 0.05 ppm
0.1 % to 2 % 0.14 % relative + 2.6 ppm
propane in synthetic air 1 ppm to 1000 ppm 0.40 % relative + 0.05 ppm
0.1 % to 1.1 % 0.14 % relative + 2.6 ppm
* The calibration and measurement capability is based on a standard uncertainty multiplied by a coverage factor k=2, providing a level of confidence of approximately 95 %. The uncertainty evaluation has been carried out in accordance with UKAS requirements.

 

 

Secondary Reference Gas Mixtures (SRGM)
Component Range Calibration and Measurement Capability (CMC)*
Binary emission gas mixtures Amount fraction (mol/mol) Amount fraction (mol/mol)
carbon monoxide in nitrogen or synthetic air 10 ppm to 100 ppm 0.25 % relative + 0.55 ppm
100 ppm to 1000 ppm 0.80 % relative
carbon dioxide in nitrogen or synthetic air 0.1 % to 5 % 0.50 % relative + 15 ppm
5 % to 15 % 0.20 % relative + 170 ppm
oxygen in nitrogen 10 ppm to 100 ppm 1.6% relative + 0.1 ppm
100 ppm to 1000 ppm 0.9% relative + 0.5 ppm
0.1 % to 1.0 % 0.7% relative + 1.0 ppm
1.0 % to 22.5 % 0.18% relative + 30 ppm
nitric oxide in nitrogen 10 ppm to 60 ppm 0.20 % relative + 0.25 ppm
60 ppm to 600 ppm 0.40 % relative  + 0.13 ppm
nitrogen dioxide in synthetic air 5 ppm to 500 ppm 4.0 % relative
sulphur dioxide in nitrogen or synthetic air 10 ppm to 200 ppm 0.17 % relative + 1.0 ppm
200 ppm to 1000 ppm 0.60 % relative + 170 ppm
methane in nitrogen 0.1 % to 2 % 0.25 % relative + 10 ppm
2 % to 5 % 0.15 % relative + 50 ppm
methane in synthetic air 0.1 % to 2 % 0.25 % relative + 10 ppm
2 % to 2.5 % 0.15 % relative + 50 ppm
Tertiary emission gas mixtures Amount fraction (mol/mol) Amount fraction (mol/mol)
nitric oxide 10 ppm to 60 ppm 0.20 % relative + 0.25 ppm
60 ppm to 600 ppm 0.40 % relative  + 0.13 ppm
nitrogen dioxide in nitrogen 5 ppm to 500 ppm 4.0 % relative
* The calibration and measurement capability is based on a standard uncertainty multiplied by a coverage factor k=2, providing a level of confidence of approximately 95 %. The uncertainty evaluation has been carried out in accordance with UKAS requirements.