#WishIknew – What’s a multivariable pressure transmitter?

Pressure

When you have a question about process automation that needs a short answer, let us know with #WishIknew and @Visaya! We’ll reply with a #WishIknew post. It’ll give a quick explanation, then some related articles, videos, or reviews if you want to know more.

I wish I knew what a multivariable pressure transmitter is!

Basically, this pressure transmitter can handle more measurements. But that doesn’t tell you much, does it? Let’s go into more detail.

Once upon a time, to measure mass flow using a pressure transmitter, you had to combine elements – differential pressure transmitter, static pressure transmitter, temperature sensor, local indicator, and a computer to collect and calculate everything.

Courtesy of Emerson Automation Solutions

You still can find this sort of solution on the market, and depending on your needs it may make a good solution. On the downside, it costs more than a multivariable pressure transmitter because it needs more structure, devices, and time to set up.

A multivariable pressure transmitter puts all of that in a single device. So you have built-in differential and static sensors, and you can connect a temperature sensor as well. The transmitter will measure mass flow accurately while requiring less structure and time to set up and run.

Courtesy of Emerson Automation Solutions

You can get a bunch of data from these multivariable pressure transmitter, such as temperature, mass flow, energy flow, and static pressure. Of course, you can find other devices that give the same or better performance. For instance, in a steam measurement, you can use a vortex flow meter instead. It just depends on what you need.

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#WishIknew - What's a multivariable pressure transmitter?
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