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WATCH IT: RiverSurveyor M9
The RiverSurveyor M9 is the first river discharge measurement system of its kind to use multifrequency acoustics. This is important when responding to extreme flood events, such as what you can see in this video featuring recent flood events in North Dakota.
Rivers • Streams • Canals
With water conservation demands growing every year, accurate and reliable flow measurements have become critical to water management decisions. Now you can enjoy the benefits of high-precision flow measurements in less time than ever, while keeping it affordable.
Whether looking to measure flow in rivers, streams or canals, SonTek hydrology instruments are renowned for their robustness, ease of use and practicality.

News
Jun 11th, 2009
YSI Acquires Design Analysis Associates
YSI welcomes WaterLog® datalogger maker DAA to its global family of businesses.
Mar 17th, 2009
SonTek/YSI is Hiring!
Be a part of our international team. NEW careers posted weekly. Check out our listings.
Feb 2nd, 2009
YSI and SonTek/YSI to Demonstrate
Advanced, Cost-Saving Technology at OceanBusiness ‘09
Ocean • Coastline • Harbors
High performance and accuracy is the trademark of SonTek’s wide range of multi-purpose oceanographic systems. The development of new and exciting instruments is driven by a skilled team of engineers with backgrounds in almost every aspect of oceanographic data collection.
SonTek offers a wide range of sophisticated equipment to provide insight into waves, tides, currents, sediment transport mechanisms, and climate changes, providing solutions to the most critical challenges facing the oceanographic community.

Current Promotion
Laboratory • Flumes • Wave Basins
Researchers in the lab are interested in detailed fluid dynamic phenomena, such as turbulence on small spatial and temporal scales, high sampling rates and small sampling volumes. With an abundance of probe options and configurations, both the SonTek MicroADV and the ADV give today's laboratory user plenty of choices for their research experiments.
Other extreme measurement conditions such as very shallow or slow-flowing water are also possible with the SonTek laboratory systems.
