NPL offer a certification service to speciality gas producers and end users, which ensures their gas mixtures are traceable to international standards.
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NPL produces an extensive range of gas calibration mixtures through a chain of direct comparisons to the national measurement standards, for highly accurate measurements of ambient air quality, natural gas, industrial emissions, vehicle and aircraft emissions, odour measurement and occupational exposure.
Gas Standards
NPL specialise in the preparation of an extensive range of traceable calibration gas standards with guaranteed relative uncertainties levels.
Further information is available on NPL gas standards:
- Gas Standards for calibrating air quality monitors
- Gas Standards for calibrating stack emission monitors
- Gas Standards for calibrating vehicle emission monitors
- Gas Standards for calibrating breath alcohol analysers
- Standard mixtures of volatile organic compounds
- Natural Gas Standards
- Refinery gas standards & proficiency testing scheme
- Certification of gas mixtures
- Frequently asked questions
- Gas Standards available from NPL (
PDF 675 KB) - Accurate, nationally traceable gas calibration standards ( PDF 381 KB)
Larger cylinders with no rental costs
NPL's Gas Standards are supplied in 10 litre cylinders, filled in excess of 100 bar. The cylinders are sold, eliminating cylinder rental costs. This proves financially beneficial when customers require gas standards over significant periods of time.
High Purity Gas Analysis
The NPL Trace Gas Analysis Facility is capable of providing traceable measurements of the key contaminant species found in high-purity gases.
NPL can supply and certify a range of high-purity gases for trace impurities.
The range of high-purity gases and trace impurities includes: Air, SO2, NO, NO2, N2O, NH3, N2, CO, CO2, H2, O2, and Hydrocarbons (both CH4 and Non CH4 Species).
Other services available from NPL
AGAC (Analysis of Gases Awareness Club)
AGAC is a club for everyone interested in gas analysis topics including air quality, industrial and vehicle emissions, occupational exposure, legislation, instrumentation, sampling, process control, diffusive monitoring, natural gas and odour.
Join AGAC for free and receive updates on events and NPL gas analysis topics.
Instrument calibration and testing
We offer a range of services for the calibration of gas analysers. Calibration of your analysers at NPL, to internationally recognised standards, is a cost-effective way of ensuring that they are operating correctly and accurately.
Instrumentation sales
NPL supplies gas sensing systems for air pollution monitoring and instrumentation for the calibration and type approval of gas analysis equipment including breath alcohol analysers and vehicle emission monitors
Pollution monitoring and analysis services
The Environmental Monitoring Group at NPL provides high quality, cost effective pollution monitoring and analysis services, including comprehensive environmental measurement and consultancy services for industry, local authorities and the government. For more information, see the Environmental Measurements page.
Natural Gas Proficiency Testing Scheme
NPL's Natural Gas Proficiency Testing (PT) Scheme enables calibration and testing laboratories to achieve greater confidence in their analyses of natural gas composition.
If you would like further information, please complete the form, or contact us using the following:
Customer enquiry line: +44 (0)20 8943 6372
Customer fax: +44 (0)20 8614 0569
E-mail: gases@npl.co.uk
Gas Standards products & services
- Standard gas mixtures are an accurate and cost-effective method for calibrating air quality monitors. They are stable and provide a repeatable reference concentration that can be used for regular calibrations. They are suitable for calibrating all types of analyser (including flame photometric, UV fluorescence, chemiluminescence and optical UV or IR).
- Standard gas mixtures provide an accurate and cost-effective method for calibrating evidential breath-alcohol analysers. They are stable and provide a repeatable reference concentration that can be used for regular calibrations.
- Standard gas mixtures provide and accurate and cost-effective method for calibrating stack gas emission monitors. They are stable and provide a repeatable reference concentration that can be used for regular calibrations. They are suitable for calibrating all types of analyser (including non-dispersive infrared, flame photometric, UV fluorescence, chemiluminesence and optical UV or IR).
- Standard gas mixtures are an accurate and cost-effective method for calibrating vehicle exhaust monitors. They are stable and provide a repeatable reference concentration that can be used for regular calibrations.
- NPL provides primary reference natural gas mixtures (PRGMs) and liquefied petroleum gas standards for sale.
- NPL provides high-accuracy primary reference gas mixtures (PRGMs) for the analysis of a range of refinery gases (including coke oven gas, reformer gas, blast furnace gas, etc.).