Coriolis meter is best described as what?

• A. A volumetric flowmeter with turbine
• B. A mass flowmeter consisting of specially formed tubing that is oscillated at a right angle to the flowing mass of fluid.
• C. A density meter
• D. A pressure differential flow meter

Answer: (B)

Coriolis meters determine mass flow by using vibrating tubing. The tubes are formed in a specific shape and driven to oscillate; when fluid moves through them, Coriolis forces act on the moving mass and cause a measurable twist or phase shift between the inlet-side and outlet-side vibrations. Sensors detect that twist and convert it into a mass flow rate. Some designs can also yield density information from the vibration behavior, but the defining feature is directly measuring how much mass is flowing per unit time.

That’s why describing it as a mass flowmeter made of specially formed tubing that's oscillated at a right angle to the flowing mass fits best. In contrast, a turbine-based meter measures volumetric flow, a density meter measures density, and a differential-pressure meter relies on pressure drop rather than tube vibration.