Flow Measurement & Control


Emerson’s new eight-path flowmeter

November 2019 Flow Measurement & Control

Emerson has introduced the Daniel 3418 eight-path gas ultrasonic flowmeter, which delivers highly accurate flow measurement in natural gas custody transfer applications with reduced upstream piping requirements and without flow conditioning. The meter compensates for flow distortions that result from pipe bends, shorter straight runs or smaller design footprints, allowing it to operate in more design configurations without sacrificing accuracy and long-term performance.

The 3418 is Emerson’s first ultrasonic flowmeter to pass all perturbation tests for OIML R-137 Accuracy Class 0.5 with only five pipe diameters in front of the meter and without a flow conditioner. It features eight interlocked direct chordal paths, positioned as two British Gas path layouts where the second is the mirror image of the first, allowing the meter to cancel out asymmetrical velocity effects. This design enables it to measure flow with greater resolution and accurately calculate swirl, reducing the need for flow conditioning and long upstream piping configurations.

As a part of the Daniel Gas Ultrasonic product line, the 3418 features the ability to calculate standard flow and directly integrate with temperature and pressure transmitters, gas chromatographs and flow computers while providing real-time meter and process diagnostics. The instrument uses Emerson’s proprietary MeterLink diagnostic software with specific enhancements designed to mimic the look and feel of the original Daniel four-path gas ultrasonic meter interface.

“The addition of this new model further supports our customers with the most technologically advanced fiscal measurement ultrasonic portfolio in the marketplace, yielding the highest level of measurement confidence available,” said Lonna Dickenson, director of product marketing for Daniel ultrasonic flowmeter products at Emerson.

Available in sizes DN250 to DN1050 (10-in to 42-in), the 3418 offers bidirectional flow capabilities, increased flow capacity and no incremental pressure drop, therefore reducing measurement risk and minimising operating cost.


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