| American Sigma, Inc. (USA): Manufacturer of Open Channel Flow Meters, Water Quality Monitors, Wastewater Samplers and Sewer System Management Software. |
| Badger Meter, Inc. (USA): Manufacturer of products using flow measurement and control technology serving industrial and utility markets worldwide. |
| Compuflow (USA): Ultrasonic Doppler Flowmeter. |
| Control Electronics Inc.: Manufacturers and designers of ultrasonic open-channel flowmeters, doppler flowmeters, level monitors and pump controllers. All meters have built-in data-logging. |
| Dynasonics (USA): Ultrasonic and magnetic flow measurement. |
| EES Ultrasonic Flowmeter Division: Supply and rent out ultrasonic flowmeters for liquid control and measurement applications. |
| Eesiflo Ultrasonic: Supplier of ultrasonic instrumentation and clamp on flow meters |
| Flotec UK Limited (UK): Transit-time clamp-on Ultrasonic flowmeter for fluid flow measurement |
| Greyline Instruments (USA, Canada): Manufacturer of non-contacting Flow Meters, Portable Doppler Flow Meters, Ultrasonic Level Controls, Tank Farm Monitors, Doppler Flow Meters, Flow Switches, Open Channel Flow Monitors |
| J-TEC Associates, Inc. (USA): founded in 1968, providing quality ultrasonic vortex flowmeters for engine, air, gas, steam, liquid applications. |
| Kam Controls Inc. (USA): Ultrasonic Flowmeter |
| Kamstrup (DK): Kamstrup energy metering, ultrasonic flowmeters. |
| Keison Products: The Prosonic Flow ultrasonic flow measurement, a clamp-on ultrasonic measurement. |
| Krohne: Variable area, magnetic-inductive, ultrasonic, mass flowmeters; level measuring instruments; flow controllers. Manufacturer, global supplier. |
| NE Sensortec (Norway): highly specialised company producing Ultrasonic Current Meters with optional sensors. |
| Quantum Hydrometrie GmbH (Germany): develops and sells hydrometric measurement solutions. |
| Siemens (Germany): SITRANS F ultrasonic flowmeter for industrial applications |
| Signal Processing SA (Switzerland): Ultrasonic Doppler velocimeters that measure in real time velocity profiles in liquid (used mainly for research applications - to understand how liquids flows - in university and industry. |
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