Paroscientific manufactures and sells a complete line of high precision pressure instrumentation. Resolution of better than 0.0001% and typical accuracy of 0.01% are achieved even under harsh environmental conditions. High precision and resolution are mandatory for applications such as oil, gas, and geothermal energy exploration, reservoir analysis, production monitoring and permanent downhole installations. Accuracy comparable to the primary standards make the Digiquartz® Transducers essential for a variety of application areas where high resolution, accuracy, reliability, ruggedness, long-term stability, low power consumption and low cost of ownership are important requirements.
The remarkable performance of these transducers is achieved through the use of a precision quartz crystal resonator whose frequency of oscillation varies with pressure induced stress. A quartz crystal temperature signal is provided to thermally compensate the calculated pressure and achieve high accuracy over a broad range of temperatures. The transducers include integral shock protection to withstand extremely high acceleration, shock, and vibrational loads. Welded buffer tubes, electrical connections, and housings ensure transducer integrity. All transducers may be installed without the need for additional isolating diaphragms or bellows.
These compact, rugged, integrated KR Series sensors are available in 6 different pressure ranges up to 20000 psi and can operate up to 177 deg C. The transducers are easy to install in downhole tools and interface easily with counters and digital computer systems.
FEATURES
- 0.01% Accuracy
- 0.0001% Resolution
- Frequency Outputs
- Small Rugged Package
- Low Power Consumption
- High Stability and Reliability
- Fully Calibrated and Characterized
- ISO 9001:2000 Quality System – NIST Traceable
APPLICATION AREAS
- Reservoir Analysis
- Production Logging
- Interference Testing
- Offshore Energy Exploration
- Oil, Gas and Geothermal Testing
PERFORMANCE
Repeatability ........... Better than ±0.01% Full Scale
Hysteresis ........... Better than ±0.01% Full Scale
Acceleration Sensitivity ........... Better than ±0.008% Full Scale /g (Three axis average)
CHARACTERISTICS
Pressure signal is a frequency output with a 10% frequency change within the frequency band 30 kHz to 42 kHz.
Temperature signal is a frequency output with a 45 ppm/°C sensitivity within the band 168 kHz to 172 kHz.
Both pressure and temperature output signals are nominally square waves of 4 volts amplitude peak to peak.
Conformance and temperature compensation equations and calibration coefficients are provided with each transducer.
Weight ........... 11.1 ounces (311 grams)
Power Requirements ........... +5 to +16 VDC. 1.3 mA Max
ENVIRONMENTAL
Overpressure ........... 1.2 times Full Scale
Shock ........... The transducer will survive a drop shock of 3500 G’s, 1/2 Sine, 0.25 msec on the tool axis, and a 2000G, 1/2, 0.25 msec shock on the radial axes. 42KR and 43KR survive 2000 G’s all axes.
Vibration ........... The transducer will survive a vibration test per NAVMAT P-9492 section 3.2.1.
