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Krohne adds entrained gas management to Optimass Coriolis flowmeter range

Flow measurement specialist Krohne has upgraded its entire range of Optimass Coriolis mass flowmeters to feature entrained gas management (EGM) technology.

With the latest additions of Optimass 3400 and 7400, the whole Optimass series now offers continuous and repeatable mass flow or density measurement with two-phase flows, such as liquids mixed with gas, slurries with gases, or highly viscous fluids with gas entrainments.

In the past, this presented a huge challenge for mass flowmeters, as without gas entrainments the measuring tubes in the Coriolis mass flowmeter have the desired regular oscillation.

Gas entrained in the liquid dampens this regular oscillation, and as the gas content increases, it can come to a complete stop.

To overcome this, Krohne developed powerful control algorithms that allow the meter to maintain oscillation and continue to measure even with complex flow conditions.

This is possible even during a complete transition from a pure liquid phase to a gas phase and back, from 0 to 100% gas content.

Mass flow and density measurements remain stable, continuous, and repeatable.

Since the introduction of the EGM technology in 2012, Optimass flowmeters with EGM have proven themselves in two-phase flow and batch/loading/empty-full-empty applications in various industries, including food and beverage, chemical, and oil and gas.

Together with the indication or configurable alarm for the user, EGM can also be used to improve processes by identifying transient gas entrainments.