This task aims to provide the traceability of leak flow rates, with reference to atmospheric pressure, at typical flow rates from 10-6 mol/s to 10-9 mol/s. Leak detectors are typically checked by means of leak artefacts, and these should be calibrated using a traceable gas flowmeter.
The gas flowmeters and techniques that will be developed in this task are complementary in their range of measurement, with an overlap in the decade of 10-7 mol/s, and also in their measurement technique. A cross-validation of the flowmeters is therefore possible and will be undertaken in this task.
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