Can pump vibrations cause problems with my Coriolis flow meter?

Flow Q&A

Hey, I have a pump installed upstream of my Coriolis flow meter. Can the pump vibration affect the flow measurement? The vendor said it works in a high frequency so I don't need to worry about that. What does that mean?

Expert’s answer: Can pump vibration cause problems with my Coriolis flow meter?

Yup, that vibration can affect your measurement! But don’t get upset yet. If this model works with a high frequency, then you won’t have the vibration resonating in the same frequency as your flow meter.

You only need to worry if the resonance of the pipe achieves the same resonance of your measuring tube. Vendors have found a number of ways to fix that issue, not just high frequency.

Image result for Yokogawa Coriolis flow meter
Courtesy of Yokogawa

For instance, Yokogawa uses an inner box connected to the outer box, with the idea that the outer box will absorb the vibrations. The crew from Azbil put a torsion bar inside the detector that vibrates the tube indirectly.

You can also find companies suggesting that you install vibration isolators. Funnily enough, although some companies claim their technology eliminates external vibration, their calibration rigs have vibration isolators installed. Is this double security? Dunno.

Anyway, this video can tell you more about Coriolis flow meters:

And if you want to read more, then these articles will help:

Coriolis effect: the physics behind Coriolis flow meters

If you work with automation, you’ve at least heard of Coriolis meters. But do you know how they work? The physics behind them? Don’t worry, we got you covered.

TOP 5 Coriolis flow meters on the market

Do you have questions about which flow meter to choose for your application? Don’t worry, we can help! Welcome to the TOP 5, where we grab the five best options on the market and roll through the stats on each so you can decide.

Related tags: Coriolis flow meter devices English Flow Intermediate Measurements Q&A troubleshooting Vibration
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