Catalog excerpts
PRODUCT CATALOGUE Piezoelectric Pressure Sensors
Open the catalog to page 1pressure measurement Introduction 4-5 That’s our conviction. That’s why we at BD|SENSORS have been committed to electronic pressure measurement technology from the very beginning. Our consistent product and quality strategy has led us to become one of the world’s leading suppliers of electronic pressure sensors within only a few years. With about 260 employees at 4 different locations (Germany, Czech Republic, Russia and China) BD|SENSORS provides solutions from 0.1 to 8000 bar: • Pressure sensors, transducers and transmitters • Electronic pressure switches • Pressure sensors with...
Open the catalog to page 3pressure measurement They have extraordinary signal properties, a low temperature drift, as well as a high temperature application range. These pressure sensors can be used uncooled in temperature ranges of up to 400 ° C (in special series up to 700 ° C). Therefore, the piezoelectric pressure sensors in the DAC series perfectly complement our existing product range. Features • Pressure ranges up to 8,000 bar • Temperatures up to 400 ° C without cooling • Measurement over 100 kHz • High resolution of approx. 1 mbar with a 500 bar measuring range • Compact and robust PIEZOELECTRIC PRESSURE...
Open the catalog to page 5Q&A What is gallium phosphate GaPO4? Gallium phosphate is a patented, unique, high temperature resistant crystal with a long life expectancy and excellent properties for the construction of robust sensors for extreme applications. For highly dynamic pressure measurement under extreme thermal and mechanical loads, it is probably the most suitable piezoelectric material available, allowing an excellent signal-to-noise ratio at extreme temperatures and offering a combination of several unique features. Contrary to many other piezoelectric materials, gallium phosphate is not pyro-electric,...
Open the catalog to page 6How does a piezoelectric pressure sensor actually measure? The basic measurement principle of piezoelectric sensors is simple. The GaPO4 crystals are placed in the sensor directly behind a thin membrane. This membrane then converts the pressure into a force onto the crystal, which then linearly reacts with a charge displacement, thus an electrical charge on the surface. This is a direct physical conversion of pressure into an electrical signal and as a result does not require any further sensor bridges, temperature compensation, etc. like other similar technology. Another advantage is that...
Open the catalog to page 7STRUCTURE OF THE MEASUREMENT CHAIN Piezoelectric Pressure Sensor Charge Amplifier Cable Low-Noise Extension Cable A piezoelectric sensor is at the beginning of the measuring chain, which is followed by an external charge amplifier. The connection between the sensor and the charge amplifier must be transmitted using a special low-noise cable. The sensor discharges in the pico-coulombs, which is why the cable must be well protected and be specifically constructed for the prevention of triboelectric effects.
Open the catalog to page 8D|AQ BOX with Laptop (PC) The pC output signal is converted into measurable 0-10V voltage in the charge amplifier. This voltage can then be passed on through a standard cable. The data acquisition system is the last step in the measuring chain. This is not absolutely mandatory, but is used in most applications. Because piezoelectric sensors are usually used in fast pressure cycles in the kHz range, suitable data recording with high sampling rates is necessary. Own data collection evaluation system
Open the catalog to page 9Laboratory and testing technology Machine and plant construction Hydraulics Development and quality assurance Compressors and pumps Turbochargers Water turbines Pipe(line) monitoring (water hammer effect) Explosive pressure measurement Explosive pressure measurement (airbag development) Pressure sensors for precise and reliable measurement of extremely rapid pressure increases of more than 1000 bar/μs and, in some cases, the extreme maximum pressure of up to 8000 bar. These high-pressure sensors are used, for example, in airbag development, medical technology, or even ballistic testing....
Open the catalog to page 10Pressure peaks during switching operations (transmissions) Transmissions are always subject to particular stress and must function under extreme operating conditions. During the development process, pressure peaks, among other things, are measured during switching operations. These measurement are used to draw conclusions about the future development of the transmission and the selection of components, for example, actuators, valves and control units. Laboratory technology (Testing of rupture discs) Rupture discs are implemented to, for example, protect steel bottles, pipes or containers...
Open the catalog to page 11OVERVIEW MATRIXfor the DAC series Product Pressure Range (bar) Sensitivity (pC/bar) Mechanical Connection Preferred Application For precision measurement, Front flush installation (Shoulder sealing) M5x0.5 For highly vibrating systems, acceleration compensated M5x0.5 For high pressure at moderate An all-round sensor for dynamic pressure without any special additional requirements M5x0.5 An all-round sensor for dynam ic pressure without any special additional requirements M5x0.5 H For high pressure at high temperatures An extremely fast sensor for high pressure
Open the catalog to page 12pressure measurement Sensitivity (pC/bar) 45 20 5.2 3 2.3 Preferred Page Precision measurement, Front flush installation (Shoulder sealing) Very robust construction for 27 - 28 continuous use High pressure sensor for extreme pressure peaks High-pressure sensor for extreme pressure peaks High-pressure sensor for extreme pressure peaks
Open the catalog to page 13DAC 102 Piezoelectric Pressure Sensors • High output signal • Internal heat transfer elements for high thermal stress capacity • High linearity over the entire pressure and temperature range • High temperature resistance (400 °C / 752 °F) • Continuous sensitivity over total life span This versatile sensor was developed for dynamic and quasi-static pressure monitoring of up to 250 bar. The sensor element with Crystal Match™ technology allows for extraordinary signal readings over the entire tempera ture range. The single crystal GaPO4 sensor element allows for constant sensitivity ensuring...
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