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2-wire Coriolis flow meter

03 June 2019

Emerson has released the Micro Motion 4200 2-wire loop-powered Coriolis transmitter, a new design that makes it possible to replace existing 2-wire flow devices with minimal effort and without the need for additional power or cabling.

The device can accommodate the largest line size (4in) of any 2-wire flow meter and is said to be the only product of its kind to offer an onboard real-time clock for improved diagnostics. 

The flow meter is available in a remote-mount option for applications that require the transmitter to be located separately from the sensor.

The transmitter is said to provide a viable migration path in applications where Coriolis meters were not previously practical as a 2-wire solution, either due to restrictions on running additional wiring or a lack of power sources. By using existing wires and eliminating the need for AC panels and transformers, the 4200 shortens engineering and planning time and reduces installation safety hazards. The unit is also suitable for greenfield applications where it is necessary to minimise wiring costs without compromising measurement performance.

To ensure reliability, the device comes as standard with Smart Meter Verification diagnostic tool which has the ability to check the structural integrity of the tubes. 

The 4200 is also SIL 2-capable with single use and SIL 3-capable with multiple meters.

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