Rosemount™ 3416 4+2 Dual-Configuration Gas Ultrasonic Flow Meter
Dual-configuration meter with 4-path fiscal and 2-path check meters. Detects trace liquids and debris to reduce LAUF gas.
Key Features
- Detect trace liquids early with a dedicated vertical reflective path designed to identify contamination along the pipe bottom in real time.
- Identify pipeline wall buildup and contamination with a second reflective path that increases sensitivity to boundary layer changes.
- Reduce custody transfer uncertainty with independent verification from reflective and chordal measurement paths that are subject to different failure modes.
- Detect flow disturbances early with diagnostics that identify swirl, asymmetry, blockage, and changing gas conditions before measurement bias occurs.
- Minimize LAUF and protect revenue by identifying liquid accumulation and buildup before they impact measurement accuracy.
- Increase operational flexibility with >100:1 rangeability to support wide flow conditions with fewer meter runs.
Frequently Asked Questions
The Rosemount™ 3416 4+2 Dual‑Configuration Gas Ultrasonic Flow Meter improves custody transfer accuracy using a dedicated vertical reflective path that quickly detects trace of liquid or contaminants at the bottom of the pipe as soon as they appear and before they alter the effective pipe diameter and flow velocity, preventing measurement bias.
The Rosemount™ 3416 uses two reflective paths—one optimized for buildup detection and one vertical path for liquid accumulation at the pipe bottom—providing greater sensitivity to contamination and boundary layer effects than single- path designs, enabling earlier detection of process conditions that impact custody transfer measurement integrity.
The Rosemount™ 3416 is recommended for applications where liquid dropout or contamination need to be detected immediately as they appear to reduce measurement errors or avoid process upsets downstream.
Liquid contaminants in natural gas pipelines create measurement bias by occupying cross-sectional area and moving slower than gas, which distorts velocity profiles and leads ultrasonic meters to overestimate flow, making early detection critical for maintaining ±0.1% custody transfer accuracy.
The Rosemount™ 3416 differentiates between meter faults and process disturbances by comparing outputs from chordal and reflective paths with different sensitivities, allowing operators to identify whether deviations are caused by liquid accumulation, buildup, or flow disturbances rather than instrumentation failure.
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