Pressure transmitters are versatile devices based on a simple working principle. And you can use them to measure more than pressure, like level and flow. If you are wondering how does a pressure transmitter work, you are in the right place. If you would know how to install one, click here.

The pressure transmitter’s working principle

Like other transmitters, a pressure transmitter consists of electronics connected to a sensor. You can find transmitters with many types of sensors on the market – capacitive, piezo-electric, resonant silicon, and more. This article will focus on the capacitive sensor, as it is the most common, although that doesn’t make it the best.

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So pressure applied to capacitive cells will produce a change in the capacitance of the sensor. This change will affect the oscillator frequency, and the pressure transmitter will detect this change. Then the transmitter translates this data into a standard output signal that we can read.

Using a local setup or a handheld, you can adjust the transmitter, changing information like the unit, measuring range, and output.

More than just a pressure device

Pressure transmitters can measure more than pressure. Using different primary elements, you can measure flow through the differential of pressure. You can also measure the level of closed and open tanks. For that, you can use a transmitter with differential, absolute, or gauge pressure.

Today we have other principles that work as well or better to measure flow or level. However, you’ll still find pressure devices across many segments, processes, and measurements.

To know more about such products, you can get in touch with our engineers!

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