Accuracy equals revenue
As natural gas systems grow more complex, operators require custody transfer metering solutions that do far more than simply measure flow. Today’s flow meters must be able to diagnose their own condition, verify measurement integrity and provide early warning of developing issues before they affect revenue
Rosemount Gas Ultrasonic Flow Meters from Emerson (figure 1) have been designed with this in mind, combining advanced diagnostics, embedded intelligence and powerful software tools to raise confidence in custody transfer measurement. These ultrasonic meters use high-performance onboard processing and advanced analytics to provide deeper insight into flow conditions and meter health, reducing unexpected problems, maintenance needs and measurement uncertainty.
TECHNOLOGY DESIGNED FOR REAL-WORLD CONDITIONS
Custody transfer applications demand consistently high accuracy, even when operating conditions are suboptimal. Traditional differential pressure technologies can struggle when exposed to flow disturbances caused by turbulence, debris or non-ideal upstream piping configurations. Ultrasonic metering technology addresses these challenges directly. Rosemount multipath designs, available in both four‑path and eight‑path configurations, measure the complete velocity profile across the pipe without restricting flow or introducing pressure loss. By sampling velocity at multiple points, the meter maintains reliable accuracy across a wide range of pressures and pipe sizes, delivers greater stability in turbulent or imperfect flow conditions, and preserves long‑term measurement integrity.
CLEAR INSIGHTS AT A GLANCE
Smart Meter Verification (SMV) is a diagnostic function that transforms complex data into an easily-interpreted, colour‑coded snapshot of meter health. Designed for automatic, unattended operation, SMV continuously monitors key parameters without requiring operator intervention. Verification reports can be generated on demand or scheduled over periods ranging from one day to six months, while up to 20 months of historical trend data is retained to support long‑term performance analysis. SMV results are accessible remotely via Emerson’s MeterLink configuration and diagnostic software or Modbus communications. This approach allows operators to confirm meter performance without extensive data analysis or routine field inspections, keeping teams focused on day-to-day operations.
DIAGNOSING MORE, GUESSING LESS
For deeper insight into meter behaviour and flow conditions, MeterLink software provides a comprehensive suite of tools. Flow‑based diagnostics help identify turbulence, swirl, asymmetry and velocity profile distortions (figure 2), while actionable alerts highlight conditions such as blockages, bore build-up, liquid presence, or deviations in speed of sound. MeterLink also supports secure user authentication, allowing up to 25 user profiles across three permission levels, and generates expanded inspection reports, complete with alarm summaries, charts and configurable visualisations. Advanced waveform and signal analysis tools support detailed troubleshooting, while Emerson’s Baseline Viewer tool enables operators to compare live operating data against known reference conditions. By converting raw diagnostic signals into clear, actionable information, MeterLink reduces reliance on manual interpretation and supports proactive decision‑making.
ONE VIEW FOR THE ENTIRE STATION
Included with MeterLink, Net Monitor brings all networked ultrasonic meters together in a single intuitive dashboard. From one screen, operators can quickly assess each meter’s status and condition, confirm flow direction and velocity, review the most recent SMV result, and check online or offline availability. This consolidated view improves situational awareness, simplifies maintenance planning, and helps teams rapidly identify abnormal conditions across multiple metering points.
IMPROVED RELIABILITY AND UPTIME
Natural gas pipelines often transport more than just gas. Scaling, rubber fragments, and other particulate debris can enter the flow, distorting velocity profiles and degrading measurement accuracy over time. Rosemount Gas Ultrasonic Flow Meters detect these disturbances early by comparing velocities across multiple acoustic paths, giving operators advance warning before custody transfer performance is compromised. Maintenance activities are also simplified. Transducers can be replaced under pressure without shutting down the meter or interrupting operations, while event logs stored for up to five years support audits, troubleshooting and regulatory compliance. Remote access reduces site visits and accelerates issue resolution, helping to lower operating costs and maximise uptime.
CERTAINTY YOU CAN STAND BEHIND
In custody transfer applications, measurement accuracy has a direct impact on revenue, making it essential for operators to deploy metering systems that can demonstrate and defend their performance. With advanced diagnostics and analytical software, and robust ultrasonic meter designs, Rosemount Gas Ultrasonic Flow Meters provide the level of certainty required to operate confidently within today’s demanding natural gas infrastructure. Engineered for real‑world operating conditions and long‑term stability, these solutions help operators protect measurement integrity, streamline maintenance strategies and maintain confidence in the measurements that matter most.
Mike Thackray is Rosemount ultrasonic product manager, Midstream Europe at Emerson. www.Emerson.com/RosemountUltrasonic
