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Gas reference materials

Gas standards for industrial emissions monitoring

Gas standards for industrial emissions monitoring

Monitoring of industrial emissions is required in order to demonstrate conformity to legislation, such as the European Directive on industrial emissions (Directive 2010/75/EU).

NPL provides gas standards for calibrating a wide variety of analysers for measuring stack and other industrial emissions gases. Binary and multi-component gas mixtures can be prepared to the requirements of the customer. The table below gives an indication of the available mixtures; others may be available on request.

Component Matrix gas Amount fraction range
From To
Carbon monoxide Nitrogen or air 1 μmol/mol 750 mmol/mol
Carbon dioxide Nitrogen or air 1 μmol/mol 750 mmol/mol
Oxygen Nitrogen 1 μmol/mol 750 mmol/mol
Nitrogen monoxide Nitrogen 1 μmol/mol 10 mmol/mol
Nitrogen dioxide Nitrogen 1 μmol/mol 5 mmol/mol
Ammonia Nitrogen 10 μmol/mol 1 mmol/mol

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