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FLOW & LEVEL CONTROL
It’s helpful for users to be able to utilise known lab measurement parameters for the process
due to a lack of alternatives, they were also used for measuring concentrations in completely different media. Normally this has limited significance because other sugary foods don’t possess the same physical attributes. If you add temperature differences between the lab and the process on top of that, then the measurement values simply cannot be compared to one another. The thermal expansion of sugared water is just different than in almond milk or oat milk. Many users talk about brix, but don’t necessarily mean sugar, although that’s what the definition calls for. As a consequence, they assume that the density value properly measured in a Coriolis flowmeter is not correct. Q: How do you deal with that? A: One possibility is to compare the
instrument and lab values with one another. Although scientists frown upon this approach, it represents a practical example of how users can successfully control their processes in many cases. This “fine-tuning” can be a final step of the concentration measurement. In many applications it’s not even necessary. We have also taken an extensive look at the user-
friendliness, which begins with commissioning of the instrument. The starting point was the launch of the Promass Q, which boasts extraordinarily good density performance. While enhancing the density measurement parameter, it became clear to us that we had to upgrade the operating software as well. The first thing we did was provide a dedicated “concentration” application package for the food industry, in addition to a package for the oil and refinery sector. This was followed by an important step that involved designing each of the application packages to make them more user-friendly. The user can choose from a selection of different media in the software. The simplest way to set up the parameters is via the Promass web server access. Q: So that eliminates manual intervention? A: Not entirely. With tricky applications or
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when measuring exotic media, manual intervention can be important and the right thing to do just like before. But even here, there are already ideas about how to make things easier for the user. It will be interesting to see what lies ahead. Q: Are there any other innovations?
A: One big step will take place in May of this
year with the availability of our Promass Q in the nominal diameter range of DN 25 with the premium density option, which is usually deployed in the bypass as a pure density monitor. With a density specification of 0.1kg/m3
,
we’re improving accuracy once again. Q: In your opinion, in what sectors do
concentration measurements still play an especially important role? A: By far the largest field of application is the
previously mentioned food industry. We also have a lot of customers in the chemical, mining and wastewater sectors. The interview was conducted by Frank
Jablonski, freelance journalist, mylk+honey, Würzburg, Germany.
Endress + Hauser
www.endress.com
MAY 2022 | PROCESS & CONTROL 29
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