We are able
to both generate and measure pneumatic gauge pressures over the range
0 kPa to 7MPa with the lowest measurement uncertainties available outside
National Standards.
Our gauge pressure facility uses standards having three fundamentally
different principles which provides us with excellent cross-comparison
opportunities
to reduce our uncertainties yet further.
The low-range gauge and differential standards consist of three transfer
standard capacitance manometers, each having at least 4 decades of overlap
with the next, providing unparalleled opportunity for confidence-building
in cross-comparison. These standards are calibrated each year in a well-respected
UKAS laboratory and our uncertainties are enhanced further by in-house
cross-comparisons with the Schwien manometers.
The low-range calibration facility is, in fact, a pressure control system
and has stabilities in the 2 x 10-3 Pa region, giving an opportunity
to evaluate the performance of manufacturer’s high integrity “dp
cells”.
Higher gauge pressure calibrations are performed using, from –100
kPa to 278 kPa, the Schwien manometers and from 5 kPa to 7 MPa, the DHI
7601 pressure balance. Details of both devices may be seen on the [Absolute]
pressure page.
In addition to standard pressure sensors and gauges, the following
generic types of pressure instruments are also supported:
- Pressure transducers / transmitters
- Micro-manometers
- Inclined manometers
- Capacitance manometers
- Gauge pressure switches
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