This table was reviewed on 14 July 2022 and refers to the ISO 17034 scope (Issue No. 003) and ISO 17025 scope (Issue No. 057) for EffecTech.

Primary Reference Gas Mixtures (PRGM)

All PRGM mixtures are issued with an ISO 17025 certificate.

 Certified Reference Materials (CRM)

All CRM mixtures are issued with a ISO 17034 certificate and an ISO 17025 certificate. To find out why, see our page on calibration gas certificates.
component range calibration and measurement capability (CMC)* range ISO 17025 calibration and measurement capability (CMC)*
amount fraction (ppm mol/mol) amount fraction (ppm mol/mol) amount fraction (ppm mol/mol) amount fraction (ppm mol/mol)
hydrogen sulphide 0.2 to 2 0.03 0.2 to 10 2 % relative + 0.03
2 to 200 1 % relative + 0.01
carbonyl sulphide 0.2 to 2 0.03 0.2 to 10 2 % relative + 0.03
2 to 200 1 % relative + 0.01
methanethiol (methyl mercaptan) 0.2 to 2 0.03 0.2 to 10 2 % relative + 0.03
2 to 200 1 % relative + 0.01
ethanethiol (ethyl mercaptan) 0.2 to 2 0.03 0.2 to 10 2 % relative + 0.03
2 to 200 1 % relative + 0.01
dimethyl sulphide 0.2 to 2 0.03 0.2 to 10 2 % relative + 0.03
2 to 200 1 % relative + 0.01
1-propanethiol (n-propyl mercaptan) N/A N/A 0.2 to 10 4 % relative + 0.03
2-propanethiol (iso-propyl mercaptan) 0.2 to 2 0.03 0.2 to 10 2 % relative + 0.03
2 to 200 1 % relative + 0.01
ethyl methyl sulphide (methyl ethyl sulphide) 0.2 to 2 0.03 0.2 to 10 2 % relative + 0.03
2 to 200 1 % relative + 0.01
1-butanethiol (n-butyl mercaptan) N/A N/A 0.2 to 10 4 % relative + 0.03
2-methyl-2-propanethiol (tert-butyl mercaptan) 0.2 to 2 0.03 0.2 to 10 2 % relative + 0.03
2 to 200 1 % relative + 0.01
2-methyl-1-propanethiol (iso-butyl mercaptan) N/A N/A 0.2 to 10 4 % relative + 0.03
1-methyl-1-propanethiol (sec-butyl mercaptan) N/A N/A 0.2 to 10 4 % relative + 0.03
diethyl sulphide 0.2 to 2 0.03 0.2 to 10 2 % relative + 0.03
2 to 200 1 % relative + 0.01
n-hexyl mercaptan N/A N/A 0.2 to 10 4 % relative + 0.03
tetrahydrothiophene (THT) 0.2 to 2 0.03 0.2 to 10 2 % relative + 0.03
2 to 200 1 % relative + 0.01
* 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

Why ISO 17034?

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About Calibration Gas Mixtures

ISO 17034 accredited certified reference materials are the industry-standard recommendation for customers.

Why buy calibration gases from EffecTech?

ISO 17034 accreditation for certified reference materials and ISO 17025 accreditation for primary reference gas mixtures provides confidence in the high quality gases you will receive from EffecTech

Video – EffecTech Calibration Gases

Find out more about the benefits of using EffecTech's calibration gases