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  • Flow Monitoring

    Get precise flow data in any lake, stream and river

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  • Ocean & Coastal Monitoring

    Accurate velocity data in any harbor, coast and ocean

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  • Irrigation Data

    Dependable irrigation flow data in agricultural canals

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Whether you are looking to collect flow data in rivers, streams or canals, or you need current profiles in deeper ocean environments, SonTek has an array of instrumentation that can be used in any body of water, at various depths. 

Industries & Applications

Surface & Groundwater

Surface & Groundwater

Surface water can be affected by land use, agricultural practices, pollution and climate change. As you already know, monitoring and treatment of surface water requires significant investments in time and money. These investments and public health may be jeopardized if surface water changes during extreme events or contamination. SonTek and other Xylem instruments work to provide a continuous and comprehensive record of water quantity and quality. Our instruments provide the reliable data you need to act quickly, work efficiently and reduce costs.

Irrigation Canals & Turnouts

Irrigation Canals & Turnouts

The demand for monitoring flow in open channels has evolved. Climate change and water scarcity issues have increased the demand to quantify increasingly smaller flows. In the past, the irrigation community has applied a variety of technologies that might have been "close enough". But today, smart water management authorities know that collecting precise data means saving time, money and our worlds most previous resource - water.

The award-winning SonTek-IQ is an intelligent acoustic Doppler instrument specifically designed for measuring flow in open channels. The innovative five-beam design incorporates a vertical beam and four velocity profiling beams, which work in tandem providing data that important water management decisions are based upon.

Ocean & Coastal

Ocean & Coastal

Sometimes all you need is a little insight into waves, tides, and currents. However, other projects require sophisticated, complex and long-term ocean monitoring solutions involving a multi-faceted approach to data collection.

Whether in shallow coastal environments, or deep blue ocean, Xylem provides solutions for environmental research used in oceanographic, hydrographic and climate research markets. Aanderaa, SonTek, Waterlog, and YSI deliver the most technologically advanced self-contained and integrated remote underwater observation systems, environmental monitoring buoys, telemetry, water quality and velocity sensors in the world.

About SonTek

About SonTek

SonTek, advancing environmental science in over 100 countries, manufactures affordable, reliable acoustic Doppler instrumentation for water velocity measurement in oceans, rivers, lakes, canals, harbors, estuaries, and laboratories.

Our instruments use sound waves to tell you how fast water is moving, where it is moving, and even if it is not moving at all.

Our customers are scientists, engineers, hydrologists, research associates, water resource planners and anyone that needs to collect velocity (speed) data in every kind of body of water imaginable.

At the core our rich history is our people — energetic about creating innovative new products, and supporting our customers in equal measure.  Our culture is collaborative and diverse, and we are passionate about making a measurable impact in all we do.  SonTek will continue to do the right thing by our customers, our people and our communities — delivering sound principles and good advice.

For more information and a full product catalog, please visit

Contact Us



9940 Summers Ridge Road
San Diego, CA 92121-3091

Phone & Email

Telephone: +1 (858) 546-8327
Fax: +1 (858) 546-8150