Galvanic Applied Sciences AccuChrome Manual - Page 8

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Section 1

Overview of the NEMS C9 Module

The NEMS C9 Module is combined with an AccuChrome GC to provide C6 through C9

hydrocarbon measurement. This allows the AccuChrome GC to perform the measurement of

up to C9 hydrocarbons in hydrocarbon gas streams and integrate the results for a more

robust range of hydrocarbon characterisation.

The AccuChrome GC is responsible for the measurement of nitrogen, carbon dioxide,

methane, ethane, propane, iso-butane, normal-butane, neo-pentane, iso-pentane, and

normal-pentane. Oxygen and carbon monoxide can be added optionally. The NEMS C9

Module extends measurement to the hexane isomers, heptane isomers, octane isomers and

nonane isomers in parallel. The results of the two analyses are combined to arrive at a full

C9 analysis of hydrocarbon gases. If required the analysis can be extended out to C12.

The NEMS C9 Module employs an advanced technology Nano-Electromechanical Systems

(NEMS) detector. This type of detector has a response that is proportional to the mass of the

molecule being detected. Heavier molecules produce a stronger response which makes this

detector ideal for higher molecular mass C6 through C9 detection, even with decreasing

concentrations.

The user should first become familiar with the AccuChrome manual. This manual is intended

to be an addendum to the AccuChrome manual and will highlight the details of operation that

are specific to the NEMS C9 Module.

Revision 1

2021/10/01