Coriolis Mass Flowmeters

Coriolis Mass Flowmeters

Coriolis mass flowmeters use the Coriolis effect in one or more oscillating measuring tubes to determine mass flow directly. As product moves through the vibrating tube, its inertia creates a measurable twist; sensors detect the resulting phase shift and convert it to mass flow. Tube frequency also provides a direct density signal, while integrated temperature measurement supports compensation and an additional temperature output.

Because the primary measurement is mass flow, performance is largely independent of changing fluid properties and velocity profile. Modern Coriolis instruments provide multivariable outputs - mass flow, density and temperature - enabling calculated values such as volume flow, solids content and concentration (including density references such as °Brix, °API, or °Plato). This makes Coriolis technology a strong fit where custody transfer, quality attributes, or tight dosing tolerances are critical.

Coriolis meters are applied across liquids, gases and liquefied gases, including challenging products such as solvents, fuels, oils, latexes, and viscous food products. They are frequently selected for batching, blending, additive injection, and recipe control, where true mass measurement improves repeatability and reduces reliance on temperature/pressure correction. The same multivariable data can be used for in-line product verification and early detection of off-spec density or entrained gas.

From an installation standpoint, Coriolis meters are typically specified as in-line devices with attention to mechanical supports, vibration isolation, and allowable pressure drop. Material selection and hygienic or high-pressure design options align the meter with corrosion, cleanability, and regulatory requirements. Where process conditions vary widely, the ability to maintain accuracy without long inlet/outlet runs simplifies piping layouts and skid packaging.

Selection is usually driven by required accuracy, turndown, available straight run, and whether density or concentration is a control variable. Considerations include two-phase flow tolerance, allowable line vibration, and the economic value of the measured stream versus installed cost. When applied within these boundaries, Coriolis technology delivers traceable, highly repeatable mass measurement that tightens material balance and improves process insight.

Miller Mechanical Specialties, an exclusive authorized representative of sales and service for Endress+Hauser.