Preparing for El Niño

Want to learn more about impact your region and how acoustic technology can play a role before, during and after an extreme event? Watch our previously recorded webinar (YouTube), featuring guest presenter NOAA Meterologist, Alex Tardy. 

NOAA Advisory predicts there is a 90% chance that El Niño will continue in the Northern hemisphere through fall 2015, and an 85% chance it will last through winter 2015-16. Are you prepared, or need a second opinion? Check out some of our featured products below, or review the latest Stormwater Monitoring catalog (9MB).

Contact SonTek and we will be happy to answer your questions. Read more about El Niño at

SonTek Products

SonTek-SL Series

SonTek®-SL Series

Inspired by the need for a simple way to measure water velocity and level in open channels

YEAR END PROMOTIONAL OFFER! Between now and December 31, 2018, every SonTek-SL 1500 or 3000 purchase will receive a free canal mount (view demo) which includes a 1.2m (4ft) length mounting frame section, slide assembly with adjustable angle mounting plate, and handle bar!* Mention promo code SLMOUNT during order. Additional mounting frame sections available for purchase.

Inspired by the need for a SIMPLE way to measure water velocity and level in open channels, the SonTek-SL (affectionately known as the Side-Looker or "SL") has earned worldwide acceptance as a long-term monitoring solution. Now, with two new (3G) models turbo-charged by our proprietary SmartPulseHD®, the SonTek-SL features  accessories, mounting options, software, and a variety of integration formats to ensure it fits your application. [View online webinar - Recorded version]

Designed specifically for side mounting on bridges, canal walls, or riverbanks, the SL's SLEEK, low-profile housing makes installation easy.  With three models to choose from, the SL can be used in channels as small as you can jump across to rivers as wide as the Amazon. Ultra narrow beam widths combined with unmatched side lobe suppression provide the SUPERIOR acoustic directivity necessary for achieving maximum horizontal range free of interference from surface or bottom boundaries.

*Cannot be combined with other offers. Terms and conditions apply

RiverSurveyor M9 & S5

RiverSurveyor® S5 and M9

A new perspective to the notion of measuring open channel hydraulics

The RiverSurveyor S5/M9 systems just keep on getting better! Our engineers continue to improve and build upon the award-winning technology, with features to include:

  • No tagline/tape measure required: With RiverSurveyor Stationary Live, automatically measure distance between stations with DGPS or RTK GPS equipped systems.
  • Manual configuration: Now you can set blanking distance, cell size and number of cells for moving boat measurements.
  • Real-time QA/QC warnings: Know when there could be a problem before there is one.
  • Zipped files: New and improved compression and auto-decompression, providing faster access to large amounts of data.
  • Sample filter: Remove your random velocity outliers with ease!

The patented and award-winning RiverSurveyor®, S5/M9 systems give a new perspective to the notion of measuring open channel hydraulics. Using SonTek's exclusive SmartPulseHD®, multiple acoustic frequencies are fused with precise bandwidth control for the most robust and continuous shallow-to-deep discharge measurements ever. A deterministic microcontroller expertly apportions the proper acoustics, pulse scheme, and cell size to get the highest definition possible so you can focus on the measurement, not the instrument setup. The system even has a vertical beam for precise channel definition and it's all designed to work intuitively.

And just like the name implies - SmartPulseHD (just like your TV) lets you see the clearest velocity picture possible with cell sizes down to 2 cm.

SonTek-IQ series

SonTek-IQ® Series

Ideal for monitoring flows in canals, culverts, pipes, and natural streams

Ideal for monitoring flows in canals, culverts, pipes, and natural streams, the SonTek-IQ starts with a custom flow algorithm derived from hundreds of field measurements. Four velocity beams profile water velocity along both the length and width of the channel, to ensure best possible coverage and most accurate representation of the velocity field. The built-in pressure sensor and vertical acoustic beam work in tandem to measure water level. Simply input the channel geometry using the intuitive SonTek-IQ software and you are outputting flow data in minutes.

NEW! All stainless steel hardware makes the IQ even more capable in difficult environments such as stormwater and certain wastewater where corrosion is a potential concern.



Exclusive 5-beam depth sounding device

FEATURED on National Geographic's IMAX movie: Extreme WeatherView Movie Trailer | Find a Theater

NOW INTEGRATED WITH HYPACK® [Learn more] The HydroSurveyor is a system designed to collect bathymetric, water column velocity profile, and acoustic bottom tracking data as part of a hydrographic survey.  The two key components of the system are the HydroSurveyor Acoustic Doppler Profiler (ADP®) platform, and the powerful, yet user-friendly, data collection software. With the HydroSurveyor platform, SonTek is able to offer an exclusive 5-beam depth sounding device, with built-in navigation, full water column velocity (currents) profiling, full compensation for speed of sound (with the CastAway-CTD), and integrated positioning solution.



The first handheld castable instrument that provides instantaneous profiles of temperature, salinity, and sound speed

Designed for coastal profiling, the CastAway-CTD® incorporates a 6-electrode conductivity cell, coupled with a fast response thermistor to provide highly accurate, high resolution CTD measurements to depths of 100 m. Now Integrated with HYPACK!

COMING SOON! The CastAway-CTD educational curriculum with emphasis on ocean chemistry for use by high school and university level instructors who wish to provide students:

  • The theory behind SALINITY: why is the ocean salty and how is salinity measured?
  • What is the Law of Constant Proportions and how does it apply to salinity?
  • Hands-on CastAway field activity emphasizing proper scientific data collection procedures;
  • Post-field work analysis of CastAway data and comparisons to global ocean temperatures and salinity data-sets available online;
  • Conservative and non-conservative elements;
  • Residence Time worksheet for tracers;
  • and more!

Other Xylem Brands



Multiparameter 6-port water quality sonde with anti-fouling wiper

The EXO advanced water quality monitoring platform includes the versatile multiparameter EXO2 sonde for oceanographic, estuarine, or surface water applications. Smart Sondes and sensors allows the user to automatically configure a sonde with different sensor for different applications in minutes.

WaterLOG Storm 3 Data Logger

WaterLOG Storm 3 Data Logger

Basic to complex communication and I/O solutions.

The Storm 3 has emerged faster, smarter and more specifically designed for today's technological advances while maintaining simplicity and ease of use. The Storm 3 is our mid-range data logger with an ideal cost-to-performance ratio. The Storm 3 incorporates a balanced set of inputs for analog, digital I/O and SDI-12 smart sensors to allow communication through cellular modems and GOES satellite. You'll love how easy it is to configure and collect data using the browser-based graphical user interface (GUI) with all standard web browsers on PCs, tablets and smart phones. You can also view your password-protected and public data anywhere with internet access using our cloud hosted data solution Storm Central.