Radar or pressure transmitter?
Nowadays, I see a lot of recommendations to use radar for level measurement. Would it benefit me to switch from a pressure transmitter to a radar level meter?.
Expert’s answer: Radar or pressure transmitter?
So, the question is whether you should choose a radar or pressure transmitter? And the answer is: Maybe, but maybe not. So, let’s find out…
Usually, the companies that promote radar point to the fact that pressure
transmitters don’t measure directly. And that’s true! A pressure transmitter derives its level measurement from the relation of height and density.
So, if your product has density changes, a pressure transmitter won’t provide good level measurements. That is unless you accurately factor in the variations.
Also, when you have a pressure transmitter using capillary, the temperature can affect the measurement. Plus, an incorrect installation can decrease the accuracy.
On the other hand, the radar meter measures the level directly without density influence. But, it has a much more complex setup. It also depends on the dielectric constant to work. Therefore, choose according to your application instead of recommendations. You know your situation and needs best.
DP pressure transmitters on the market:
Radars on the market:
Other resources that might interest you
Pressure transmitter basics
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I have to install and calibrate a Rosemount differential pressure transmitter. So, how do I do the offset and slope adjustment?
I have a new level measurement application. But the vendor wants to sell me wireless stuff with the radar. So, what kind of concerns should I have?