Geotech Mastehead


Water Level & Pressure Equipment

SonTek Acoustic Doppler
Water Velocity Measurement

Geotech is a SonTek representative in Colorado, New Mexico, Utah, and Wyoming.

with Probe Attached

SonTek FlowTracker®2

The FlowTracker®2 (FT2) handheld Acoustic Doppler Velocimeter (ADV®) has all the technology you have grown to know and trust with the original FlowTracker, but now comes with functional, modernized features (Bluetooth, GPS and large color screen, to name only a few) based on the evaluation and feedback from hydrologists, researchers and scientists who have made the FlowTracker their instrument of choice.

  • Large color screen
  • Set up and save templates — no need to re-enter data every time you visit a site
  • Embedded GPS for georeferencing with automatic or manual fixes
  • Visual prompts guide you through the measurement process
  • Bluetooth or direct USB interface with PC
  • Battery life icon on the screen at all times
  • Tactile, rugged keypad and IP-67 waterproof rating
  • 2-year warranty and 24/7 tech support
  • Multi-language

Call 1-800-833-7958

SonTek FlowTracker2 Specifications
SonTek FlowTracker2 Quickstart Guide
SonTek FlowTracker2 User's Manual

The SonTek Flow Display, with options for 4-20 mA outputs
The SonTek Flow Display,
with options for 4-20 mA outputs


The SonTek-IQ™ starts with a custom flow algorithm derived from hundreds of field measurements. The four velocity beams profile water velocity both vertically and horizontally ensuring complete coverage of the velocity field. The built-in pressure sensor and vertical acoustic beam work in tandem to measure the water level. Simply input the channel geometry using the intuitive SonTek-IQ software and you are outputting flow data in minutes.

  • Easy Installation: User friendly mounting brackets allow for the SonTek-IQ to be installed by simply inserting two bolts
  • Simple Integration: The SonTek-IQ supports communications via RS232, SDI-12 and Modbus.
  • Self contained all-in-one design
  • Proprietary flow algorithms for small irrigation canals
  • Uses SonTek's exclusive SmartPulseHD adaptive sampling
  • Self-calibrating water level using vertical beam and pressure
  • Standard package includes, SonTek-IQ Software, easy mounting hardware, cable, adaptor and power supply

Call 1-800-833-7958

SonTek-IQ Specifications

RiverSurveyor® M9 & S5
RiverSurveyor® M9 & S5

SonTek Hydroboard used as a floatable platform for Riversurveyor systems
SonTek Hydroboard
used as a floatable platform for
Riversurveyor systems

RiverSurveyor® S5 and M9

The 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.

Primary Applications

  • Moving Vessel Discharge
  • Wading Discharge Measurements
  • Irrigation Canals/Natural Streams/Rivers
  • Velocity Indexing
  • Flood Alert
  • Water Supply
  • Pollution Monitoring
  • Tide Studies
  • Flow/Current Field

Call 1-800-833-7958

SonTek RiverSurveyor Specifications

SonTek CastAway-CTD

SonTek CastAway®-CTD

The CastAway-CTD is a lightweight, easy to use instrument designed for quick and accurate conductivity, temperature, and depth profiles. Starting with a unique six-electrode conductivity cell and fast response thermistor the CastAway makes use of modern technology to provide state of the art CTD measurements.

  • 5Hz response and sampling rate
  • Accurate to 0.1 PSU, 0.05°C
  • Internal GPS
  • Bluetooth wireless data download
  • No user calibration required
  • No tools, computers or cables required


  • Coastal Oceanography
  • Hydrology
  • Aquaculture/Fisheries
  • Saltwater Intrusion
  • Surveying/Hydrography
  • Sound Velocity Profiles
  • Field Sensor Verification
  • Estuarine Research

Call 1-800-833-7958

SonTek CastAway-CTD Specifications



The Argonaut-SL is a side-looking Doppler current meter that precisely measures 2-D water velocity in a horizontal layer. Because it is easily installed on a riverbank, bridge abutment, or other vertical structure, it is the perfect choice for long-term current monitoring. Options for water level measurement, water quality, telemetry, and flow calculation extend the capability of the Argonaut SL to a wide variety of applications.

Call 1-800-833-7958

SonTek Argonaut-SL Specifications



Providing robust, laboratory-precision flow measurements in a compact and easy-to use package, the Argonaut-ADV is the ultimate solution to shallow water flow monitoring. Ideal for low-flow applications, it is equally versatile in higher velocity environments and when precise water velocity is needed close to a boundary.

Call 1-800-833-7958

SonTek Argonaut-ADV Specifications



Designed specifically for mounting on the bottom and looking up, the low-profile Argonaut-XR is an advanced Doppler sonar for 3-D water velocity measurement. Because the Argonaut-XR vertically integrates water velocity from the bottom all the way to the surface, it is an ideal tool for sites where bi-directional flows are present. Optional CTDs and multiprobes can make it a complete environmental monitoring solution.

Call 1-800-833-7958

SonTek Argonaut-XR Specifications

Not sure which SonTek/YSI instrument is best for your application?
Go to the Instrument Selection Guide for help in matching your interests.

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