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Rosemount™ 3418 Eight-Path Gas Ultrasonic Flow Meter

High-accuracy custody transfer 8-path meter with swirl immunity. Requires minimal straight run and no flow conditioner—ideal for compact installations.

The Rosemount™ 3418 Eight‑Path Gas Ultrasonic Flow Meter delivers high‑accuracy custody transfer measurement with advanced swirl immunity for challenging installations. Its eight‑path design compensates for flow disturbances, enabling OIML R137 Class 0.5 performance with as little as 5D upstream piping and no flow conditioner—helping reduce installation cost, simplify design, and ensure reliable, audit‑ready measurement in natural gas applications.​

Key Features

  • Maintain custody transfer accuracy with minimal upstream piping and no flow conditioner using an eight-path design that compensates for swirl, asymmetry, and crossflow, reducing pressure loss, blockage risk, and maintenance requirements.​
  • Enable compact installations with as little as 5D upstream piping while maintaining OIML R137 Class 0.5 performance.​
  • Increase operational flexibility with >100:1 rangeability to support wide flow conditions with fewer meter runs. ​
  • Simplify troubleshooting with Smart Meter Verification that converts diagnostic data into clear, actionable insights.​
  • Improve measurement confidence using multi-path diagnostics that detect changing flow profiles and process disturbances early.​
  • Minimize downtime with non-wetted transducers that can be serviced or replaced under pressure without special tools.​
  • Support advanced calculations with electronics that compute corrected volume, mass, and energy flow rates in real time.​
  • Automate compliance with integrated AGA 8 and AGA 10/GERG- 2008 calculations for consistent, audit-ready gas measurement.​
  • Enable flexible integration with high-speed electronics offering Ethernet connectivity and multiple I/O options.