KROHNE Introduces OPTIMASS 5400 Coriolis Mass Flowmeter

KROHNE has introduced the OPTIMASS 5400, a twin semi-bent tube Coriolis mass flowmeter developed for standard process measurement tasks involving liquids and gases. The instrument is positioned to bridge entry-level and high-tier Coriolis devices, targeting chemical processing, oil and gas, marine, food and beverage, and pharmaceutical installations. Its compact footprint also allows integration into mobile units, transport tankers, and skid-mounted process machinery.

Process Capabilities and Measurement Accuracy
Operating across a broad envelope, the device measures direct parameters including mass flow, density, and temperature, alongside calculated values for volume flow, flow velocity, and concentration. The meter withstands operating pressures up to 100 barg and media temperatures up to +180°C. Plant safety is reinforced by a sensor enclosure with a typical burst case pressure resistance of up to 200 barg. For flow rates surpassing 10% of the nominal scale, an optional mass flow measurement accuracy of ±0.1% is offered.

Flow Stability and Digital Connectivity
Handling of multi-phase media is managed through integrated Entrained Gas Management (EGM) technology, which maintains measurement continuity under variable gas fractions, provides two-phase flow alerts, and tracks liquid gas volume fractions. Communication architecture relies on modular electronics supporting HART 7, Modbus, FOUNDATION Fieldbus, PROFIBUS-PA/DP, PROFINET, PROFINET over Ethernet-APL, and EtherNet/IP. The unit includes three configurable 4 to 20 mA outputs and wireless Bluetooth connectivity.

Field verification and commissioning can be conducted without disrupting processes using the OPTICHECK Flow mobile application or remotely via OPTICHECK DTM. Integrated OPTICHECK diagnostics continually track device health and operational conditions. The meter is manufactured in compact or remote setups, incorporates a material-saving eco-design, operates on a modular supply model targeting two-week standard delivery schedules, and functions as a flange-to-flange replacement for existing OPTIMASS 1000 installations.

Additional Context
This section details technical specifications not included in the original news release.

Coriolis mass flowmeters calculate mass throughput directly by detecting phase shifts caused by the Coriolis force across vibrating measuring tubes, while fluid density is determined concurrently from the resonant frequency of the oscillating tube assembly. Twin semi-bent tube configurations optimize the balance between minimal pressure drop and resistance to external pipeline vibrations, typically providing line-size coverage spanning nominal diameters from DN10 (1/2 inch) to DN100 (4 inches). By integrating Ethernet-APL (Advanced Physical Layer) support, process meters can transmit 10 Mbit/s full-duplex digital field diagnostics and dynamic variables across two-wire Ethernet lines extending up to 1,000 meters into intrinsic safety zones without separate power feeds. Furthermore, self-draining geometries compliant with NAMUR NE 132 dimensional standards enable clean-in-place (CIP) and steam-in-place (SIP) cycling, mitigating cross-contamination in shear-sensitive or hygienic fluid pathways.

Edited by Romila DSilva, Induportals Editor, with AI assistance.