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Dynasonics® TFX Ultra®

Clamp-on ultrasonic flow and energy meters for liquids

Ultrasonic flow meter TFX Ultra with EasyRail sensors
  • Reduced material cost: 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
Water, Lubricant oil
max. flow:
from 3.18 up to 5260284 l/min
from -40 up to 176 °C
Water & waste water industry, Chemical industry, Pharmaceutical industry, Food & beverage industry, General industry, Oil industry, Aerospace industry, Automotive industry
Dynasonics® TFX Ultra®
Dynasonics® TFX Ultra®

General information

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, MBTU, MMBTU, Tons, kJ, kW, MW and is ideal for retrofit, chilled water and other HVAC applications.

Technical data

Liquid typesMost clean liquids or liquids with small amounts of suspended solids
Pipe sizesDN 15 up to DN 3000
Accuracy±1 % of reading resp ±0.003 m/s
Power supplyAC: 95 – 264 VAC 47 – 63 Hz @ 17 VA max. resp. 20 – 28 VAC 47 – 63 Hz @ 0,35 A max.
DC: 10 – 28 VDC @ 5 W max.
Ambient conditions-40 °C up to +85 °C
Velocity rangeBi directional 0,03 up to 12 m/s
DisplayTwo line LCD, LED backlit
Sensors TFX Ultra® Easy Rail systemsmall / big
Pipe sizeDN 50 - DN 150 / DN 50 - 300
Pipe surface temperatureup to +120 °C
Sensor frequency1 MHz
Sensors TFX Ultra®
Pipe sizeDN 15 – DN 3000
EnclosureDTTR = Ultem®
DTTS = PVC, Ultem®
Pipe surface temperatureDTTR = -40 °C up to +121 °C
DTTC / DTTL = -40 °C up to +90 °C
DTTN = -40 °C up to +90 °C
DTTH = -40 °C up to +176 °C
DTTS = PVC: -40 °C up to +60 °C
DTTC = CPVC: -40 °C up to +85 °C
Sensor frequencyDTTS / DTTC = 2 MHz
DTTL = 500 KHz

Measuring principle

Heat meters

Heat meters

The heat meters use the highly precise ultrasonic transit time measuring principle, for which two ultrasonic sensors are externally mounted on the pipeline and connected to the electronic. The ultrasonic sensors work alternately as transmitter and receiver, and mutually send ultrasonic signals. During these transmissions, the respective signal transit times of the to-and-from signals (t1, t2) are measured.  

The electronic measures the difference of the transit time of the ultrasonic signals going with and against the flow direction t1 and t2. These signals are either decelerated or accelerated by the medium flow. The difference produced in both signal transit times is proportional to the flow rate and is used together with the pipeline geometry for a precise flow calculation


Detecting water distribution leaks in the municipality of Ludvika in Sweden


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Do you have questions on this product?

Your contact person:

Badger Meter Swiss AG
Mittelholzerstrasse 8
CH-3006 Bern