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Rosemount™ JuniorSonic 3411 One - Path Gas Ultrasonic Flow Meter
Rosemount 3411 Gas Ultrasonic Flow Meter
Cost-effective and reliable, the field-proven Rosemount JuniorSonic™ 3411 One-Path Gas Ultrasonic Flow Meter offers a single-bounce path design for accurate, stable performance during allocation and other non-fiscal measurement applications.
This next-generation design features ultra-fast 3410 Series Electronics that generate a wealth of predictive diagnostics in real time. MeterLink™ Software displays the diagnostics in an intuitive user interface that enables operators to expedite detection of flow disturbances to enhance measurement reliability while reducing maintenance time and costs.
Rosemount™ JuniorSonic 3411 One - Path Gas Ultrasonic Flow Meter


Line Sizes
DN100 to DN900 (4-in to 36-in)
Fluid Type
±0.2% of reading with calibration (±1.5% of actual flow volume without calibration)
±0.1% of reading for 5 to 100 fps (1.5 to 30.5 m/s)
Rated up to 100 fps (30 m/s) with over-range performance exceeding 125 fps (38 m/s) on some sizes
Operating Temperature Range
T-21 Transducers: -20°C to +100°C (-4°F to +212°F)
T-41 Transducers: -50°C to +100°C (-58°F to +212°F)
Electronics: -40°C to +60°C (-40°F to +140°F)
Operating Pressure Range
T-21 Transducers: 1034 to 27,579 kPa (150 to 4000 psig)
T-41 Transducers: 1034 to 27,579 kPa (150 to 4000 psig)
Carbon steel and stainless steel


  • Virtually eliminate incremental pressure drop and reduce energy costs with the meter’s full-bore design
  • Improve maintenance practices and lower costs with no internal moving parts
  • Detect flow disturbances in real time with ultra-fast Rosemount 3410 Series Electronics to minimize uncertainty
  • Monitor flow analysis and receive an intuitive view of meter health with integrated MeterLink Software
  • Enhance performance in harsh conditions long term with rugged Rosemount T-21 Transducers
    Field-replaceable transformer module simplifies maintenance and maximizes uptime
  • Reduce manual errors with automatic calculations of AGA 8 Compressibility and AGA 10 Speed of Sound
  • Increase I/O with new Type 4 CPU Module with up to six frequency or digital outputs