The gas chromatographs of the PGC 9300 series are approved and designed for custody transfer gas analysis for hydrogen-containing natural gases with different hydrogen contents. The PGC 9304 is approved for natural gas containing hydrogen up to a hydrogen content of 20 mol-%.
The PGC 9303 and PGC 9302 are approved for natural gas and biogas with up to 5 mol% hydrogen, respectively.
The PGC 9301 is not approved for custody transfer measurement of gases containing hydrogen.