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Rosemount SeniorSonic 3414 Four-Path Gas Ultrasonic Flow Meter
Preferred worldwide for fiscal measurement, the next-generation Rosemount™ SeniorSonic™ 3414 Four-Path Ultrasonic Flow Meter retains the field-proven, British Gas-chordal design while significantly increasing sampling speed with ultra-fast Rosemount 3410 Series Electronics.
This powerful, high-performance meter minimizes measurement uncertainty by enabling rapid detection of changing flow dynamics such as blockages upstream of the meter, abnormal flow profiles and liquid hydrocarbons. MeterLink™ Software displays a wealth of predictive diagnostics generated by the meter, providing expert flow analysis, flow disturbance alerts and suggested corrective actions, to expedite detection before measurement is impacted.
Rosemount SeniorSonic 3414 Four-Path Gas Ultrasonic Flow Meter


Line Sizes
DN100 to DN1050 (4-in to 42-in)
DN100 to DN150 (4-in to 6-in) are 45° dual X orientation
DN200 (8-in) and larger are British Gas (BG) orientation
Fluid Type
±0.1% of reading relative over entire flow calibration range
±0.05% of reading for 5 to 100 ft/s (1.5 to 30.5 m/s)
Rated up to 100 ft/s (30 m/s) with over-range performance exceeding 125 ft/s (38 m/s) on some sizes
Operating Temperature Range
T-21 Transducers: -20°C to +100°C (-4°F to +212°F)T-22 Transducers: -50°C to +100°C (-58°F to +212°F)
Operating Pressure Range
T-21/T-22 Transducers: 689 to 27,579 kPag (100 to 4,000 psig)T-21/T-22 Transducers: 345 kPag (50 psig) minimum operating pressure available with reduced QmaxT-22 Transducers: 0 to 689 kPag (0 to 100 psig) isolated transducer mou
Carbon steel and stainless steel


  • Speed issue resolution with 3D view of the flow profile that indicates swirl, crossflow, asymmetry and turbulence
  • Reduce manual errors with automatic calculations of AGA 8 Compressibility and AGA 10 Speed of Sound
  • Expedite flow disturbance detection with patented transducer synchronization that prevents interference and noise
  • Reduce measurement uncertainty with process alerts for wall buildup, liquids, blockage and deviating gas quality
  • Increase I/O with new Type 4 CPU Module with up to six frequency or digital outputs
  • T-200 Transducers are safely extractable under pressure without special tools (for line sizes up to 42")
  • Significantly reduce time previous spent on data analysis and troubleshooting with the new Smart Meter Verification Basic feature now included in the latest 3410 Electronics firmware update
  • T-200 Transducers are safely extractable under pressure without special tools (for line sizes up to 12”)


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