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Dynasonics Tfx Ultra Flow Meter Review: Pros, Cons, and Applications
Quick Answer: The Dynasonics Tfx Ultra is a clamp-on transit time ultrasonic flow meter for clean liquids on pipes from DN15 to DN1500. It works well for temporary surveys and HVAC balancing but not for dirty or aerated flow. For those cases consider a Silver Instruments electromagnetic or Coriolis flow meter.
What Is the Dynasonics Tfx Ultra?
This meter clamps on the outside of a pipe. No pipe cutting is needed. No process shutdown is needed. Operators use it on clean water, glycol, and light chemical lines. The display shows flow rate and totalizer.
Setup is quick. You enter pipe material, outside diameter, wall thickness, and fluid type. The transmitter then calculates flow. The meter has no wetted parts. That means no pressure drop and no leak risk.
Key Specifications That Matter to Engineers
The standard transducer set covers pipe sizes from DN15 to DN1500 on carbon steel, stainless steel, copper, and PVC. Velocity range is 0.03 m/s to 12 m/s. Outputs include 4-20 mA, pulse, and RS485 Modbus. Accuracy is about 1% of reading on clean water with a good straight run. Repeatability is around 0.2%. The standard transducer temperature range is -40 °C to 150 °C.
The unit has a built-in datalogger. That is useful for flow audits on water lines in Australia and Southeast Asia. Many field engineers also use it to check pump performance.
Pros of the Dynasonics Tfx Ultra
The main benefit is fast non-invasive installation. A single technician can mount the transducers in about 30 minutes. The meter helps with temporary flow measurement without cutting pipes or stopping production.
The menu is simple. Most technicians learn it after one job. The datalogger records flow data for later download. The unit is portable enough for site audits. In practice, we have seen stable signals on clean water and HVAC chilled water lines.
Cons and Limitations
The transit time method fails when the liquid has bubbles or solids. Raw sewage, sludge, and many slurry lines will cause signal loss. For those applications choose an electromagnetic flow meter.
Accurate pipe data is required. If the pipe has internal scale or unknown wall thickness, error increases. The coupling compound can dry out in hot climates like Saudi Arabia or Qatar. You need to replace it often. The meter also needs straight run. Plan for 10 pipe diameters upstream and 5 downstream.
Price can be an issue. A new Tfx Ultra kit is often more expensive than a fixed inline electromagnetic meter for DN100 clean water. If you need permanent flow monitoring, consider a Silver Instruments electromagnetic flow meter.
Typical Applications and Installations
The Tfx Ultra works well for HVAC balancing, pump aud
For permanent clean water service the meter can work. But for high viscosity fluids, slurries, or custody transfer you need a Coriolis or electromagnetic meter. A paint manufacturer in Vietnam asked us to compare this unit with a Silver Instruments Coriolis flow meter. The Coriolis meter gave stable mass flow on high viscosity paint. The Tfx Ultra could not handle the pigment solids.
Silver Automation Instruments Alternative for Your Flow Measurement
Silver Instruments supplies clamp-on ultrasonic flow meters, Coriolis mass flow meters, electromagnetic flow meters, and vortex flow meters. Our clamp-on ultrasonic meter supports pipe sizes from DN15 to DN1200, 4-20 mA HART output, RS485 Modbus, and a datalogger. Accuracy is 1% of reading on clean water. The price is competitive for distributors and end users in Southeast Asia, Latin America, the Middle East, and Africa.
For dirty water or sludge choose our electromagnetic flow meter. For high viscosity oils, adhesives, or paint choose our Coriolis mass flow meter. Send us your flow range, pipe size (DN), pressure (bar), temperature (°C), and fluid type. We will quote a meter that fits your process.
Contact Silver Automation Instruments at Tel: +86-25-68650347, Whatsapp: +86-25-52155837, WeChat: +86 15365082610. Our sales engineers answer technical questions weekdays during China business hours.
FAQ
What pipe sizes does the Dynasonics Tfx Ultra support? The standard transducer set covers DN15 to DN1500 depending on pipe OD and wall thickness.
Can the Dynasonics Tfx Ultra measure dirty or aerated liquids? No. The meter is not reliable when bubbles or solid particles disturb the acoustic path. For dirty water or wastewater use a Silver Instruments electromagnetic flow meter.
Is the Dynasonics Tfx Ultra ATEX approved? Some versions carry ATEX Zone 1 certification. Confirm the exact model and transducer type before you order for a hazardous area.
How does the Dynasonics Tfx Ultra compare to Silver Instruments clamp-on meters? Both are transit time clamp-on meters for clean liquids. Silver Instruments meters offer similar pipe sizes, 4-20 mA HART, RS485, and a datalogger. The main difference is price and local China based support.
What flow accuracy can I expect in the field? On clean water with a straight run of 10D upstream and 5D downstream you can expect 1% to 2% of reading. Poor pipe condition or short straight runs reduce accuracy to 3% or more.
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