Ultrasonic Transit Time Flow meter

TFX Ultra ultrasonic flow and energy meters clamp onto the outside of pipes and do not contact the internal liquid.

The technology has inherent advantages over alternate devices including: low-cost installation, no pressure head loss, no moving parts to maintain or replace, no fluid compatibility issue, and a large, bi-directional measuring range that ensures reliable readings even at very low and high flow rates.

TFX Ultra is available in a variety of configurations that permit the user to select a meter with features suitable to meet particular application requirements.


Dynasonics TFX Ultra - Clamp-on Ultrasonic Flow & Energy Meter for Liquids

  • Ability to measure liquids with small amounts of suspended solids or aeration (e.g., surface water, sewage).
  • Bi-directional flow measurement system. Totalizer options include forward, reverse and net total.
  • Modbus RTU over RS485 communications; Ethernet connection includes BACnet/IPĀ®, EtherNet/IP™ and Modbus TCP/IP protocols.
  • Compact enclosure uses large, easy-to-read digital display.
  • Rugged, aluminum enclosure ensures a long service life in harsh environments.
The TFX Ultra is available in two versions: a stand-alone flow meter, and an energy flow meter used in conjunction with dual clamp-on RTDs. The energy flow meter measures energy usage in BTU or Tons, and is ideal for retrofit, chilled water and other HVAC applications.
Ultrasonic Transit Time Flow meter

clamp-on flometer views



  • Reduced material costs: clamp-on sensor eliminates the need
  • for in-line flanges, pipe fittings, strainers, and filters.
  • Reduced installation time: the TFX Ultra may be installed and
  • fully operational within minutes.
  • Reduced maintenance costs: with no moving parts, there is
  • nothing on the TFX Ultra to wear down - no repair kits or
  • replacement parts are needed.
  • No need to shut down the process for installation or maintenance
  • due to clamp-on sensor design.


One Download

TFX Ultra Datasheet (897 KB)

Instruction Manual

One Download

TFX Ultra Manual (3330 KB)

See also

High Performance Ultrasonic Flow Meter

High performance Flow Meter from Fuji Electric, with advanced features such as the Anti Bubble Measurement system.

Ultrasonic flowmeters sub

Hybrid Flow Meter

Hybrid flow meter utilizes both Doppler and transit time ultrasonic sound technologies.

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