Ultrasonic Flowmeters

Flow, whether volumetric or mass, is one of the most measured variables in industrial processes. Water, natural gas, steam, oil, chemicals, and wastewater are just a few examples of the different liquids or gases that are measured on a daily basis. As there is no universal technology suitable for all of these applications, we offer you the support to choose the right tecnology and sizing.

Ultrasonic Flowmeters

Measurement Principle

This method uses two sensors, positioned facing each other on the measuring tube. Each sensor can alternately transmit and receive ultrasonic signals, while simultaneously measuring the transit time of the signal. As soon as the fluid in the tube begins to flow, the signals accelerate in the direction of the flow but are delayed in the opposite direction. The differential transit time, measured by the two sensors, is directly proportional to the flow rate.


Independent measurement of pressure, density, temperature, conductivity and viscosity (for homogeneous fluids)

Free pipe section, without pressure loss, clamp-on version available with installation external to the pipeline without process interruption

No moving parts, minimal maintenance and cost of ownership

Measurement accuracy from ± 0.3% to ± 2% depending on version

Nominal sizes available DN15 to DN4000 (1/2 to 160”), -40 to 200 ° C

Long service life, no abrasion or corrosion of the fluid in external mounting version

In-line or clamp-on design for stationary or temporary flow measurements


Prosonic Flow W
Standard applications

Prosonic Flow P
Process applications

Prosonic Flow F
Chemistry or energy industry applications

Prosonic Flow B
Methane / biogas applications

Prosonic Flow T
Portable or temporary applications

Prosonic flow E
Standard applications in liquids

Prosonic flow G
Applications in natural gas with changing conditions

ECN Automation
offers comprehensive solutions.

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