Daniel JuniorSonic 3411 One-Path Gas Ultrasonic Flow Meter


Daniel JuniorSonic 3411 One-Path Gas Ultrasonic Flow Meter


Cost-effective and reliable, the field-proven Daniel™ 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.


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
  • Transducers: -20°C to +100°C (-4°F to +212°F)
  • Electronics: -40°C to +60°C (-40°F to +140°F)
Operating Pressure Range
1,034 to 27,579 kPag (150 to 4,000 psig)
Carbon steel and stainless steel


  • Inspections and audits keep you ahead of issues that force unplanned downtime and jeopardize asset integrity. With our Flow Audit Services, we identify potential and hidden issues to ensure confidence in all your flow measurement devices. We also can integrate new technologies into your system that elevate accuracy and performance.

    Emerson’s Flow Audit Service provides expert advice to help you get the most out of your flow measurement devices. Understanding the status of your instrumentation is critical to ensuring accuracy, optimal uptime and extending the lifetime of your flowmeters.

    The Flow Audit Service identifies issues and ensures your meters are accurate and precise – within your operating environment. From the survey to spare parts inventory review, and transmitters or sensors standardization to recommendations and a final report, we cover every facet of meter operation to ensure confidence in your flow measurement devices.

    Flow Audit Service benefits:

    • Manage cost and proactively deal with obsolescence issues
    • Optimize your spare parts inventory
    • Reduce reactive maintenance situations
    • Increase core competencies of your technicians through training
    • Ensure your devices are installed and sized correctly
    • Improve plant availability
    • Support plant turnarounds in the preparation phase
  • 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 Daniel 3410 Series Electronics to minimize uncertainty
  • Monitor flow analysis and receive an intuitive view of meter health with integrated Daniel MeterLink Software
  • Enhance performance in harsh conditions long term with rugged Daniel 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

Documents & Drawings