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Pressure Sensors, Transducers

P51-15-G-UB-D-20MA-000-000 Application Field and Working Principle

Pressure sensors, also known as pressure transmitters, are a type of transducer. They are devices that measure and monitor the pressure of liquids and gases. The data is then converted into an electrical signal for use in a variety of applications. Pressure sensors are used in a wide variety of applications, including aerospace, automotive, industrial, medical, and military.

Working Principle

Pressure sensors are designed to measure absolute pressure, which is the total pressure of a system, or gauge pressure, which is the pressure of a system relative to ambient pressure. The working principle of a pressure sensor is based on the principle of a capacitive transducer. When the pressure of a system is increased, the capacitance of the sensor is also increased due to the increased area of contact between the metal plates. This increase in capacitance is then converted to an electrical signal which can be monitored and used to measure the pressure in the system.

Types of Pressure Sensors

Pressure sensors come in many different types, including: mechanical, diaphragm, capacitive, piezoelectric, piezoresistive, and strain gauge. Mechanical pressure sensors use a mechanical system, such as a bellows, to convert pressure to a mechanical displacement. Diaphragm pressure sensors use a diaphragm to detect pressure. Capacitive pressure sensors use two metal plates separated by an insulator to detect pressure. Piezoelectric pressure sensors use a piezoelectric crystal to detect pressure. Piezoresistive pressure sensors use a resistor to detect pressure. Finally, strain gauge pressure sensors use a strain gauge to detect pressure.

Applications

Pressure sensors are used in a wide variety of applications, including aircraft, automotive, industrial, medical, and military systems. In aircraft, pressure sensors are used to provide a real-time indication of engine performance and cabin pressure. In the automotive industry, pressure sensors are used to measure engine performance and emissions. In industrial applications, pressure sensors are used to measure liquid flow, and are used in HVAC systems to regulate airflow. In medical applications, pressure sensors are used to measure blood pressure. In the military, pressure sensors are used to measure the pressure of tanks and other military vessels.

Conclusion

Pressure sensors are a type of transducer used to measure and monitor pressure. They are designed to measure either absolute pressure or gauge pressure, and come in a variety of types. Pressure sensors are used in a wide variety of applications, including aerospace, automotive, industrial, medical, and military.

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