Piezoelectric Pressure Transducer
Pressure Piezo Transducer
Piezoelectric pressure transducer is synonymous with rugged, stable and extremely efficient and accurate transducers.
These transducers make use of the ability of certain materials, especially ceramics, to generate an electrical charge when the pressure or mechanical stress is exerted on the substances.
Needless to say, the substances are perfect as far as construction of the diaphragm of the pressure sensors is concerned. The pressure exerted on the piezoelectric material is passed on to the sensor which leads to the generation of the electric charge which is then measured by digital or analog means.
The biggest advantage that a piezoelectric pressure transducer offers over all other transducers is that it is extremely rapid and involves a virtually zero deflection due to the compression.
One of the biggest disadvantages of mechanical devices was that the interconnection of the various parts often led to lack of accuracy. This may not be a big deal.
However even the slightest reduction or increase in pressure may be very harmful for productivity or even unsafe in the automobile industry, the nuclear or aerospace industry.
This piezoelectric pressure transducer uses direct-sensing materials such as crystals or plastics. Piezoelectric materials as they become subject to strain, stress or as in this case extreme pressure exhibit a change in resistance a necessary ingredient in high frequency electrical output.
These advantages apart, the piezoelectric pressure sensor is absolutely inert to radiation, temperature variations and electromagnetic fields. This makes it perfect to be used in the nuclear industry.
If you think that the piezoelectric pressure transducer is used only in fancy devices and expensive equipment, then think again. The basic logic underlying these transducers are utilized in cell phones that offer touch pad facilities. Hence, the next time you whip out of the cell phone and use the screen to operate the device, remember that you are just making use of a piezoelectric transducer to get the job done.
You will have to pay special emphasis on the sensing material used and the sensing design utilized in the device. Different ceramic and devices have different piezoelectric qualities.
Hence, you should choose the right substance depending upon your requirements. Further, the design has a significant impact on the size and the weight of the final product that will be installed.
Design becomes very important in underwater or high altitude equipment as increase or decrease in weight and size will have a significant impact on productivity and efficiency.
Piezoelectric Pressure Transducer Devices
Following are some of the piezoelectic pressure transducer devices available in the market.
1) 902 Absolute Piezo Vacuum Transducer
2) 910 DualTrans MicroPirani/Absolute Piezo Vacuum Transducer
Blood pressure transducers - relying on the same old blood pressure measurement device that gives vague and inaccurate readings is not advisable.
Honeywell Pressure - a very well known and reputable brand in the market. That is the reason why it is very important going for good quality and accurate pressure transducers.
Ashcroft Pressure Transducer, one you can rely on when it comes to pressure measurements.
Digital Pressure has always been considered a great improvement over analog devices. Conversion of the electrical output of the transducer from analog to digital takes place with the use of microprocessor based data acquisition system. As the name suggests, a digital pressure transducer is a device that provides a digital reading of the pressure exerted on the diaphragm.
Current To Pressure - normally this type of pressure transducer has an output of 4-20 mA converted to pressure values of 3-15 psi. It is obvious that you will have to use the transducer only when the current and the pressure are within the specified range.
Submersible Pressure - making liquid measurements less cumbersome! A submersible pressure transducer is normally used to measure water or liquid quantity in factories and other industrial units. Employing labor specifically for the task of measurement of liquid is a very expensive and cumbersome process. Further, there are storage holding tanks which cannot be accessed again and again.
Vacuum Transducer does not mean a pressure sensor that operates in a vacuum. It is impossible to create an absolute vacuum on earth. In fact, a vacuum does not exist even in space as there always is some matter, even if it is invisible to the ordinary eye, in space.
Absolute Pressure. They need to deliver accurate measurements even when subject to extreme environmental conditions. Because of their importance in data gathering even on the ocean floor, they have to withstand the effects of corrosive elements. They have to be rated highly in terms of safety or ingress protection (IP rating).
Differential pressure transducer - typically used in pressure or flow measurements.
Pacific transducer - a name trusted in metrology, manufacture of transducers, pressure gauges and many others.
Taking a look at the critical functions and features of each Fairchild transducer will give you a better sense of direction when you're making your choice of industrial pressure transducers.
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