FAST PRESSURE TRANSIENTS
Quartzdyne
downhole pressure transducers are designed to respond to very
rapid changes in pressure. The problem to be solved by the
transducer engineer is that large, rapid changes in pressure
produce temperature changes (due the work required to compress
fluids), this is commonly called "PV heating".
Although the pressure sensor responds instantaneously to pressure, it cannot
respond instantaneously to temperature. It does have some thermal mass. Quartzdyne
includes both pressure and temperature sensors inside the transducer; matching
the response of these sensors to both pressure and temperature events provides
the rapid response to pressure steps and temperature ramps.
Quartzdyne has designed the transducers for optimum performance
in the downhole environment of simultaneously increasing pressure
and temperature. Experimental results showing the response
to extreme conditions are demonstrated in a  technote.
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