The Types of Pressure Transducers

Pressure transducers can be categorized into two main types based on their technology: strain gauge-based pressure transducers and capacitive pressure transducers. Both types of pressure transducers feature a wide range of advantages, depending on the intended application.

Strain gauge pressure transducers

Strain gauge pressure transducers are devices used to measure the pressure of fluids and gases. They work by converting the applied pressure into a strain on a diaphragm which is measured by a strain gauge attached to the diaphragm.

The strain gauge measures the change in resistance caused by the strain on the diaphragm, which provides an accurate measure of the pressure being applied. The output signal from the strain gauge is amplified and converted into a voltage or current signal that can be read by a pressure indicator or controller. Strain gauge pressure transducers are commonly used in quasi-static applications such as pressure monitoring of a process or instrumentation. 

Capacitive pressure transducers

Capacitive pressure transducers are devices that convert pressure into an electrical signal by measuring changes in capacitance. They typically consist of a sensing element and a reference element separated by a diaphragm. When pressure is applied to the diaphragm, it causes a deflection that changes the distance between the sensing and reference elements, which in turn changes the capacitance. This change in capacitance is then converted into an electrical signal and transmitted to a data acquisition system for processing and analysis.

Capacitive pressure transducers are commonly used in industrial, automotive, aerospace, and medical applications, where accurate and reliable pressure measurement is essential. They offer high accuracy, stability, and linearity, and can operate over a wide range of pressures and temperatures. They are also typically small, lightweight, and durable, making them ideal for use in harsh environments.

We hope this article has helped you understand the types of pressure transducers.

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