Piezoelectric, Quartz Pressure Sensors for
Dynamic Pressure Measurements
The PCB® full line of piezoelectric pressure sensors are used for a variety of dynamic pressure measurements. Some examples include: compression, pulsations, surges, cavitation, hydraulic and pneumatic pressure fluctuations, high-intensity sound, fluid borne noise detection, shock and blast waves, ballistics, explosive component testing (e.g. detonators, explosive bolts), closed bomb combustion studies, and other dynamic pressures from <0.0001 psi to >100,000 psi (<0.690 Pa to >690 MPa).
The ability to measure small pressure fluctuations at high static pressure levels is a unique characteristic of piezoelectric pressure sensors. With ICP® amplified output, the sensors are well suited for continuous operation in “dirty” environments, underwater, and in field test applications across long cables. Since special low-noise cable and charge amplifiers are not required, ICP® sensor systems are substantially lower in cost per channel. Because of the ICP® sensor’s low impedance output, superior signal-to-noise ratio, ability to drive long low-cost coaxial cables, they are ideal for virtually all dynamic pressure applications where sensor temperatures range from -320 to +275 °F (-196 to +135 °C). For higher temperature applications, charge output sensors are available for use up to +750 °F (+399 °C).
Although piezoelectric pressure sensors are primarily recommended for dynamic pressure measurements, some quartz pressure sensors have long discharge time constants that extend low-frequency capability to permit static calibration and measurement of quasi-static pressures over a period of a few seconds.
Solid state construction of a piezoelectric pressure sensor allows for a wide linear measuring range such that PCB® confidently provides calibrations at 100% and 10% of full scale output for most models. Multiple strain gage or piezoresistive type sensors, with their narrow measuring ranges, would be required to make the range of measurements possible with a single quartz piezoelectric sensor.
Standard or specialized sensors and mounting adaptors can be provided to facilitate sensor installation in existing mounting ports.
To discuss specific applications, or if a special pressure sensor or adaptor is required, please contact PCB® for assistance. |
