A
range of laminar flow and sonic nozzles are used as our flow standards
ensuring good transfer of international standards directly to your
instruments.
All
standards have a large degree of range overlap and a programme of periodic
cross-flow checks ensures a high level of confidence in the standards
used.
Our extensive experience in the thermal
mass flow measurement and control market has enabled us to accumulate a
wealth of knowledge in
the service and calibration of all major manufacturer’s thermal
mass flow instruments. Test gases available are dry filtered air,
pure oxygen free Nitrogen, Helium* and Argon. Instruments ranged
for other
gases are calibrated by applying the manufacturer’s published
gas correction factor (usually from Nitrogen or Air) calculated from
empirical data or theory based on the thermodynamic properties of
the gas.
Although the majority of our work involves
the calibration & test
of electronic thermal mass flow meters & controllers, we are also
able to calibrate the following types of gas flow instruments:
- Coriolis meters
- Variable area meters
(Rotameters)
- Turbine flow meters
- Orifice plate / venturi
flow meters
- Piston provers / bubble meters
- Gas blenders / dividers
Our low differential pressure capability also enables us to
perform pressure drop measurements across primary flow devices
at known flow
rates. This provides valuable flow data on customer artefacts such
as laminar flow elements, orifice plates, sintered discs, filters
and standard leaks.
* A 25% surcharge applies
to calibrations performed using helium.
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