How Does a Pressure Transmitter Work?

How Does a Pressure Transmitter Work?

by Pressure Vacuum Level Limited on July 18, 2023 Categories: Product News

Pressure transmitters are essential devices used in various industries to accurately measure and monitor pressure levels. They play a crucial role in ensuring the safety and efficiency of many processes. But have you ever wondered how a pressure transmitter works?

In this blog post, we will explore the basic functioning of a pressure transmitter.

To understand how a pressure transmitter works, let's break it down into three main components: the sensing element, the signal conditioning circuitry, and the output display.

1. Sensing Element

At the heart of a pressure transmitter lies the sensing element, which detects the pressure and converts it into an electrical signal. The sensing element is typically a diaphragm or a thin metal membrane that deforms when exposed to pressure. This deformation causes a change in resistance, capacitance, or voltage, depending on the sensing technology employed.

2. Signal Conditioning Circuitry

Once the sensing element has converted the pressure into an electrical signal, the signal conditioning circuitry comes into play. This circuitry processes and refines the signal to make it suitable for transmission and interpretation. It may include components like amplifiers, filters, and temperature compensation mechanisms to ensure the accuracy and stability of the signal.

The signal conditioning circuitry also compensates for various factors that can affect the accuracy of the pressure measurement. These factors may include temperature changes, vibration, and ambient pressure fluctuations. The pressure transmitter provides reliable and precise measurements by accounting for these variables.

3. Output Display

The final component of a pressure transmitter is the output display. This can take different forms, such as a digital readout, an analogue gauge, or a signal sent to a control system. The purpose of the output display is to present the pressure measurement in a user-friendly format that can be easily interpreted by operators or integrated into automated systems.

Pressure transmitters often have additional features, such as adjustable ranges, calibration capabilities, and communication protocols that allow them to interface with other devices or systems. These features enhance the versatility and functionality of pressure transmitters, making them adaptable to a wide range of applications.


A pressure transmitter utilises a sensing element to detect pressure changes, converting them into electrical signals. The circuitry then conditioned and processed these signals to account for environmental factors and ensure accuracy. Finally, the pressure measurement is displayed in a user-friendly format or transmitted to other devices or systems. Understanding how pressure transmitters work can help us appreciate their significance in manufacturing, oil and gas, healthcare, etc. They enable precise control, monitoring, and safety in processes where accurate pressure measurement is crucial.

PVL Pressure Transmitters

Pressure Vacuum Level Ltd has been selling high-quality pressure transmitters for over 28 years. PVL provides these devices for various industries.

Don't hesitate to contact us if you have any questions about our pressure transmitters or other products by emailing or calling +44 (0) 1892 66 44 99