Rugged build quality with high-end ADV® performance is what the ADVOcean-Hydra is all about. Representing the ultimate solution to measuring precise 3D velocity in the most challenging environments, the ADVOcean/Hydra can be integrated with an array of external sensors for a complete oceanographic data collection system. With the optional RPT pressure sensor, this powerful system is able to sample both pressure and velocity at up to 25 Hz, making it the definitive solution for studying nearshore processes.

  • Features
  • Specifications
  • Software

The Hydra (package option featuring the ADVOcean probe) is a fully integrated, 3-axis (3D), ocean sensor system that includes a powerful data acquisition system, a high-resolution velocity sensor, a strain gage pressure sensor, and top-of-the-line sensors from other manufacturers all in one seamless package.

ADVOcean/Hydra Mount

Hydra Standard Features

  • ADVOcean in an autonomous configuration
  • 5MHz ADVOcean Probe with integrated compass/tilt sensor and piezoresistive pressure sensor
  • Processor electronics package in cylindrical underwater canister with 2 GB recorder and two alkaline battery packs
  • ViewHydra Windows data analysis software

Hydra Optional Features

  • Internal RPT silicon resonance pressure sensor
  • SeaBird CT Sensor serial interface
  • Optical Backscatter Sensor analog interface
  • 10 MHz ADV Probe on stem or flexible cable with 10 cm distance to sampling volume
  • ViewHydra Pro advanced data analysis software
Programmable Velocity Range Scales 5, 20, 50, 200, 500 cm/s
Velocity — Resolution 0.1 cm/s
Velocity — Accuracy ±1% of measured velocity, ±0.5 cm/s at up to 25 Hz
Temperature — Resolution 0.01°C
Temperature — Accuracy ±0.1°C
Power — Input 12-24 VDC
Typical Continuous Operating Power Consumption 2.5 to 4.0 W
Battery capacity — Alkaline, 2 packs 1200 W·h
Compass/Tilt Sensor — Heading, Pitch, Roll Resolution 0.1°
Compass/Tilt Sensor — Heading Accuracy ±2°
Compass/Tilt Sensor — Pitch, Roll Accuracy ±1°
Operating Temperature -5° to 45°C
Storage Temperature -10° to 60°C
Depth Rating - Delrin probe 400 m
Depth Rating - Stainless Steel probe 400 m
Canister Dimensions - Diameter x Height 16.5cm x 74.9cm
Hydra Optional Resonance Pressure Transducer (RPT) - Accuracy 0.01%
RPT - Maximum Depth 20 m

HorizonADV Screenshot

HorizonADV — v 1.20 — 05Jul2007

ADVField and MicroADVField data collection and review software.

*Note: ADV systems using HorizonADV must have ADV CPU firmware version 8.0 or later installed. If you need to update your system's firmware, contact SonTek Support.

Important: If you have a version of HorizonADV earlier than v1.00, we recommend that you UNINSTALL the "old" version before installing the "new" version. This is REQUIRED for any of our beta testers.

ViewHydra Screenshot

ViewHydra Software — v 2.93 — 04Feb2004

Hydra data display and analysis software (Windows).

ViewHydraPro Screenshot

ViewHydraPro — v 2.93 — 04Feb2004

Hydra data display and analysis software (Windows). This "Pro" version supports directional wave measurement studies and advanced data analysis. Requires directional waves option.

*Note: A software license is required to run this program. This license requires that you purchase the directional waves option. If you have this option, but have not received the required software license, you can request a ViewHydraPro software license.

Request a License

Get Software

Options & Accessories

Flexible ADV probe

Flexible ADV Probe

ADV Probe on stem or flexible cable with 10 cm distance to sampling volume.


Acoustic Doppler Velocimeter Making Waves

Acoustic Doppler Velocimeters

Understanding wave behavior has huge implications, from the most casual surfer to the most rugged Navy special-ops warrior and plenty of people in between.  Surfers are looking for a beautiful curl and a long ride; Navy SEALs are careful to avoid dangerous currents, but want enough wave action to hide them from enemy radar.  Then there are zoning authorities looking for guidance on beachfront development, park commissioners trying to determine whether to site a public beach on a strip of shoreline, and health agencies hoping to predict where – and how quickly – a toxic spill will travel along the coast. (As published in Sea Technology magazine.)