Krohne has introduced the Optimass 6400 to enhance its portfolio of Coriolis mass flowmeters. The Optimass 6400 is an all-new twin bent tube Coriolis mass flowmeter to meet standard liquid and gas applications in the chemical and petrochemical, oil & gas, pharmaceutical, food & beverage and power industries.
The flowmeter features advanced entrained gas management (EGM). 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’ the last stable reading to cover this, Krohne says this new instrument with EGM is able to follow and correct for 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.
Compliant to Namur standard installation lengths, units are available in sizes DN 08-250 covering a temperature range up to 400°C, as well as cryogenic applications down to -200°C and pressures up to 200 bar.
These specifications, together with the unique feature of EGM and custody transfer approvals for both liquids (OIML R-117-1/MI005) and gases (OIML – R137/MI002), make the Optimass 6400 suitable for process industries and specialist applications like LNG, CNG or supercritical gases in terminal or storage/bunkering, along with custody transfer applications. Housings are available in stainless steel 316L, Hastelloy C22 and Duplex steel UNS S31803.
This is the first Krohne mass flowmeter to feature the new signal converter MFC 400, Krohne’s latest state of the art digital electronics. The fast, completely digital, signal processing of the MFC 400 provides the EGM feature as well as dynamic density measurement, together these provide a very accurate volume flow output and mass measurement. The MFC 400 provides enhanced diagnostic and status indications according to Namur NE 107 and will subsequently be available for all Optimass mass flowmeters.
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