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Transit Time Ultrasonic Flow Meters

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Series TFX Ultra™ – Clamp-on Ultrasonic Flow & Energy Meter for Liquids


TFXL Integral Mount Transit Time Ultrasonic Flow Meter

TFX Ultra Flow Meter


TFX Ultra Brochure (1,158KB PDF)
Specification Data Sheet (1,157KB PDF)
Specification Data Sheet Spanish (1,157KB PDF)
Operations Manual (3,067KB PDF)
TFXB Engineering Specifications (134KB PDF)
TFXE Engineering Specifications (142KB PDF)

Software Downloads

Ethernet/IP™ Conformance
Test Report
(149KB PDF)

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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.

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.

Features of the TFX Ultra include:

  • 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/IP®, 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.


BACNET is a registered trademark of American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE).
EtherNet/IP is a trademark of ControlNetInternational under license by ODVA.

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