Coriolis Mass Flowmeters

Coriolis Mass Flowmeters

Coriolis Mass Flowmeters determine mass flow directly by exciting one or more measuring tubes into controlled oscillation. When fluid moves through the vibrating tube, inertial forces impose a twist that appears as a measurable phase shift between sensors. That phase difference is proportional to mass flow, while the tube’s oscillation frequency provides density; an integrated temperature measurement supports thermal compensation and additional computed variables.

This “direct mass” approach is largely insensitive to changing flow profile and many fluid properties, which is valuable when line conditions are not ideal or when product properties vary during a campaign. Typical performance is about ±0.1% of rate, with tighter uncertainty available via premium calibration options. Because straight-run requirements are minimal, Coriolis can simplify piping layout and reduce sensitivity to upstream disturbances.

Multivariable outputs enable more than throughput measurement. Density and temperature can be used for product identification, interface detection, and concentration calculations (for example, °Brix or °API referenced density conventions), supporting real-time quality monitoring. The result is tighter control of blending ratios, improved batch consistency, and reduced giveaway in filling and packaging operations where small errors accumulate into material loss.

Applications span liquids, gases, and liquefied gases across industries, including solvents, fuels, crude oil, alcohols, food products, and hygienic media. Coriolis technology is frequently applied to batching, dosing, blending, additive injection, and custody-transfer service when traceable accuracy and stable long-term performance are required. It is also a strong choice for mass-balance programs and loss accounting because it measures the quantity of matter moved rather than an inferred volume.

Selection typically balances required uncertainty, turndown, allowable pressure drop, and the likelihood of two-phase effects (entrained gas, flashing, or solids). Material compatibility and pressure rating drive reliability, and installation choices address vibration, mounting support, and zero stability. Where density information is used for control, verification practices and diagnostic strategy should be aligned with the process risk profile and compliance requirements.

Forberg Smith, an exclusive authorized representative of sales and service for Endress+Hauser.