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Pressure sensors are a type of transducer that can convert physical phenomena into measurable electric signals, such as mechanical pressure, heat, light, sound, humidity, acceleration, rotation, etc. Pressure sensors can be used to measure pressure in many different application fields, from in-control systems to medical and environmental application fields. There are two major types of pressure sensors, the piezoelectric pressure transducer and the strain gauge pressure transducer.

Piezoelectric Pressure Transducer

Piezoelectric pressure transducer is a device which can accurately measure and convert pressure to electric signals. It is made up of a quartz crystal diaphragm which is exposed to the pressure to be measured. When the pressure is applied, it causes the quartz crystal to produce a small amount of elastric charge. This charge is transferred to a circuit which produces an electric output signal proportional to the applied pressure. The output signal can then be used to control pressure in the system.

The advantages of piezoelectric pressure transducer are its high accuracy and stability, the wide range of pressure measurement, low level electrical noise, fast response time, and a variety of mounting options. It is suitable for applications involving the measurement of high-voltage and low-pressure. The disadvantages of this type of transducer are its relatively high cost and difficulty in installation.

Strain Gauge Pressure Transducer

The strain gauge pressure transducer is a type of device that uses a strain gauge to convert pressure into an electrical output. The strain gauge is a device which is attached to the diaphragm and a spring is used to transmit the force from the diaphragm to the strain gauge. When the pressure is applied, the diaphragm is displaced and the strain gauge deforms, producing a small electrical signal. This signal is then amplified and converted to an electrical output, which is proportional to the applied pressure.

The advantages of a strain gauge pressure transducer are that they are simple to install, require no electricity, have a low cost, and have a fast response time. The disadvantages of this type of transducer are that it is not as accurate as other pressure sensors, and its range is limited. It is also sensitive to temperature extremes and may require frequent calibration.

Conclusion

Both the piezoelectric pressure transducer and the strain gauge pressure transducer are important types of pressure sensors and transducers which can be used in a variety of application fields. Each type has its own advantages and disadvantages, so it is important to consider the type of application before choosing the appropriate pressure sensor or transducer.

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