National Physical Laboratory

What is a Calibrated Gas Mixture (CGM)? (FAQ - Gas Standards)

Calibrated Gas Mixtures are lower down in the gases hierarchy than PRGM or SGS. These are mixtures that have been supplied by reputable gas companies and individually certified against NPL's Primary Standard Misxtures held on site.

See also:

Last Updated: 25 Mar 2010
Created: 2 Aug 2007