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EGM for Twin Straight Tube Coriolis Flowmeters

No Loss of Measurement

| Editor: Wolfgang Ernhofer

Twin straight tube Coriolis flowmeters Optimass 1400 and Optimass 2400 now available with Entrained Gas Management EGM: No loss of measurement with gas entrainment up to 100%
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Twin straight tube Coriolis flowmeters Optimass 1400 and Optimass 2400 now available with Entrained Gas Management EGM: No loss of measurement with gas entrainment up to 100% (Picture: Krohne)

Krohne introduces the Optimass 1400 and Optimass 2400 with the new signal converter MFC 400. Thereby, the Entrained Gas Management EGM feature is now available for the twin straight tube sensors, providing no loss of measurement with gas entrainment up to 100 %.

In the past, gas entrainments in liquid media presented a huge challenge for mass flowmeters because the relative movement between gas and fluid dampens the amplitude of the measuring tube. This dampening leads to inconsistent sensor amplitudes, which interfere with the electronics’ capability to determine the actual resonant frequency.

While other mass flowmeters simply "freeze" their last stable reading to cover this "loss of measurement", Optimass flowmeters with EGM are able to follow and correct for the varying amplitudes. This is achieved for entrained gas up to 100 % of volume and continues to present an actual measured reading, together with an indication or configurable alarm for the user. This indication can be very helpful to improve processes by identifying transient gas entrainments.

The EGM feature is mainly relying on the fast, completely digital, signal processing of the MFC 400 signal converter. The MFC 400 also provides enhanced diagnostic and status indications according to Namur NE 107.

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