But introduce a small amount of entrained gas into the process, and things can change quickly.
The meter’s measuring tubes are designed to detect mass flow based on vibration. When gas bubbles enter the fluid, they alter the vibration characteristics, leading to unstable flow readings, density errors, and sometimes process alarms.
In many cases, the flowmeter is not faulty.
The real issue is the process condition.
Before blaming the instrument, check for air ingress, flashing liquids, cavitation, or inadequate upstream conditions.
Sometimes the problem is not the meter.
It’s the bubbles.