Within the sensor construction the
diaphragms are hydraulically linked, the lower diaphragm
is "rated" to suit the density span whilst the
upper is compliant and provides a pressure transfer, via
the hydraulic fill, to the rear of the rated diaphragm.
Actual displacement of the lower diaphragm is measured
using the proven LVDT principle. An amplifier module
receives the LVDTs output signal and conditions it
to provide a 4 to 20 mA output over the required span.
For convenience this amplifier may be sited up to 100
Metres away from the sensor.
PSMs
unrivalled experience in the design and application of
pressure sensitive diaphragms and a versatile approach to
unit construction, ensures optimum performance on all
applications. Previous successes include drilling Mud storage
vessels where mechanical protection and rugged
construction are essential.
Units can be
manufactured to suit either external flanged, threaded, or as a completely submersible unit
suitable for pole suspension or clamping in place
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