Answering the buyer’s search for clamp-on ultrasonic flow meters, this guide highlights five reliable options suitable for non-invasive flow measurement on a wide range of pipes and liquids. These meters are best for industrial facilities, water treatment, chemical processing, and laboratories that need quick installation without shutting down systems. Each pick is evaluated for accuracy, sensor setup, data logging, and compatibility with different pipe sizes. A quick summary table follows to help you compare key specs at a glance.
| Product | Best For | Key Benefit |
|---|---|---|
| Bonvoisin Handheld Ultrasonic Flow Meter | Seawater and industrial fluids | Data logger and flexible units |
| ValueStoreUS Ultrasonic Flow Meter | General liquids and high-temp environments | Broad temperature range |
| CGOLDENWALL Handheld Ultrasonic Flowmeter | Copper/PVC piping | Wide pipe coverage with dual transducers |
| EnSyuSuMa Tuf-2000B Series | Water, sewage, and light oil | Multiple outputs and rugged transducers |
| FXEIPOL TS-2 / TM-1 Kit | Residential to light commercial water flows | High-quality construction and accuracy |
Bonvoisin Handheld Ultrasonic Flow Meter
The Bonvoisin device uses S1+M2 transducers for non-destructive flow measurement and supports DN15-700mm pipes. It offers unit switching between liters and gallons, aiding users who track volume across systems or regions. The meter features an internal data logger capable of storing up to 2000 measurement records and can display real-time data on the unit while enabling software-based historical review. Best for industrial settings where non-stop operation is essential and data export is required.
Who it’s best for: mid- to large-diameter pipe systems in seawater, chemical, or wastewater contexts that need periodic data downloads and on-site monitoring without interrupting process lines.
Limitation: While data export is available, you may need to obtain the companion software first, and higher-order sensor options (L2) require direct contact with the supplier.
ValueStoreUS Ultrasonic Flow Meter
This meter uses small and medium transducers designed for pipes from 0.76 to 27 inches (20 to 700 mm). It claims 99% accuracy and supports both liquids like water and seawater as well as fuels. High-temperature transducers extend its utility to environments up to 320°F (160°C). It is suitable for a broad material range including plastics and metals. Best for facilities needing a flexible, high-temperature capable solution with broad liquid compatibility.
Who it’s best for: facilities handling liquids from clean water to fuels where high-temperature tolerance reduces the need for multiple instruments.
Caution: Compatibility with extreme chemical aggressiveness should be verified per liquid type before deployment, and couplant considerations exist for the older panel version.
CGOLDENWALL Handheld Ultrasonic Flowmeter
CGOLDENWALL’s model uses S1+M2 transducers with DN15-100 mm and DN50-700 mm coverage, spanning small to large pipes. The device includes a digital display showing cumulative flow, instantaneous flow, velocity, and status. It includes a built-in data logger with up to 2000 records and RS232 output for PC download. Note that couplant is not included, and substitutes such as butter or dish soap can be used. Best for users who want on-device readouts and a straightforward data pipeline to a computer.
Who it’s best for: plants that need quick deployment with clear on-device measurements and a simple data export path. Choose this if you value ready-made digital readouts and RS232 compatibility.
Limitation: Couplant is not included, so procurement planning should consider a suitable alternative to ensure good transducer contact on site.
EnSyuSuMa Tuf-2000B Series
The Tuf-2000B system includes TS-2 and TM-1 transducers with a robust listing of outputs (4-20 mA, Oct Pulse, Relay) and inputs, designed for broader monitoring and control tasks. It supports DN20-700 mm ranges and is pitched for water, seawater, sewage, oil, and alcohol contexts. Best for integrated process control where multiple signal outputs are needed to feed SCADA or PLC systems.
Who it’s best for: industrial processes requiring multiple signal types for automation and supervisory control, especially where non-contact measurement is a priority.
Limitation: The kit’s breadth can be overkill for small-scale applications; confirm required outputs align with existing control hardware to avoid unnecessary complexity.
FXEIPOL Ultrasonic Flow Meter
FXEIPOL offers a TS-2 & TM-1 transducer setup designed for DN20-700 mm pipes with a TUF-2000B body. The unit emphasizes durability with high-quality ABS and steel construction, providing ±1% accuracy and broad applicability across liquids. It is suitable for water supply and similar systems where robust build quality matters. Best for users seeking a compact, durable solution with strong accuracy in typical water-related applications.
Who it’s best for: facilities that require a well-built, cost-effective option for water and similar liquids with standard pipe sizes. Choose this if durability and consistent accuracy are priorities in a mid-range deployment.
Caution: While described as durable, verify compatibility with your exact liquid chemistry and ensure proper installation to maintain accuracy over time.
Buying Guide
What to consider when selecting a clamp-on ultrasonic flow meter:
- Pipe size and range: Ensure the device covers your DN size (from small to very large diameters) and check DN15-700 mm versus wider options.
- Transducer type: S1+M2 vs TS-2/TM-1/TL-1 configurations affect measurement range, installation, and maintenance needs.
- Accuracy and repeatability: Look for ±1% accuracy with 0.5% linearity and 0.2% repeatability for reliable long-term data.
- Non-destructive design: Non-contact, clamp-on measurement protects pipes and minimizes downtime.
- Data logging and output options: Consider built-in data logs (often 2000 entries) and available interfaces (RS232, 4-20 mA, pulse, relay) for integration with SCADA or PLC systems.
- Temperature and liquid compatibility: Ensure the meter supports your liquids (water, seawater, fuels, alcohol) and ranges from sub-freezing to high temperatures if needed.
- Couplant needs: Some models don’t include couplant; plan for a suitable substitute and maintenance to maintain transducer contact.
- Installation and maintenance: Prioritize models that require no pipe cutting and feature straightforward transducer mounting for quick commissioning.
FAQ
- What is a clamp-on ultrasonic flow meter?
It is a non-invasive device that measures flow by attaching transducers to the outside of a pipe and using ultrasonic waves to infer velocity and volume.
- Do clamp-on meters require shutting down the process for installation?
No. They are designed to be non-destructive and to install while the system operates in most cases.
- What liquids can these meters measure?
Typical options include water, seawater, sewage, oil, and various chemicals. Always verify compatibility with the exact liquid and pipe material.
- Is data logging common on these meters?
Yes. Many units store thousands of records and support PC data download via RS232 or other interfaces.
- What should I look for in an industrial version?
Durability, multiple output options, wide pipe coverage, and robust construction help ensure reliability in challenging environments.
- What is the best option if I need high-temperature operation?
Look for transducers rated for temperatures up to 320°F (160°C) or higher, as found in several models listed here.