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Marine Measurements

Sentinel ADCP
The global leader in high accuracy data collection...

Teledyne's RDI Sentinel ADCP

The self-contained Sentinel is Teledyne RD Instruments’ most popular and versatile Acoustic Doppler Current Profiler (ADCP) configuration, boasting thousands of units in operation in over 50 countries around the world.

By providing profiling ranges from 1 to 165m, the high-frequency Sentinel ADCP is ideally suited for a wide variety of applications. The Sentinel also offers unbeatable precision, with unmatched low power consumption, allowing you to collect more data over an extended period.

The lightweight and adaptable Sentinel is easily deployed on buoys, boats, or mounted on the seafloor. Real-time data can be transmitted to shore via a cable link or acoustic modem, or data can be stored internally for short or long-term deployments. The Sentinel is easily upgraded to include pressure, bottom tracking, and/or directional wave measurement—for the ultimate data collection solution.

New integrated solution!
WH Sentinel ADCP / Citadel NXIC CTD
Key Specifications
Frequency: 300, 600 or 1200 kHz
Max Range: <1 to >150 meters
Configuration: Self-contained or vessel mount

Download Workhorse Sentinel ADCP Datasheet (299 Kb) >>click here

Application Information
Workhorse Sentinel Applications
>> view app notes

ADCPs for Internal Wave Measurements? >>Click here

Data Samples
Workhorse Sentinel Data Samples
>> view data

Not sure which ADCP is right for you? Consult our product selection guide >>download PDF

Workhorse Sentinel Product FAQs 
>>learn more


  • Versatility: Direct reading or self contained, moored or moving, the Sentinel provides precision current profiling data when and where you need it most.
  • A solid upgrade path: The Sentinel has been designed to grow with your needs. Easy upgrades include pressure, bottom tracking, and directional wave measurement.
  • Precision data: Teledyne RDI’s patented BroadBand signal processing delivers very low-noise data, resulting in unparalleled data resolution and minimal power consumption.
  • A four-beam solution: Teledyne RDI’s patented 4-beam design improves data reliability by providing a redundant data source in the case of a blocked or damaged beam; improves data quality by delivering an independent measure known as error velocity; and improves data accuracy by reducing variance in your data.
  • Budget an issue? This product is available in our new value priced basic Express Configuration. Same broadband quality, with basic current profiling capabilities >>learn more

Need a turnkey mooring solution?
RDI has partnered with DeepWater Buoyancy to provide you with one stop shopping.

Sentinel ADCP Applications

Highlighted Application: Real-time Current Monitoring Requirement for the Miami Ocean Dredged Material Disposal Site (1995-2000)
Collecting ADCP data to analyze and assess the impacts on dredging operations and the potential for disposal plume interaction with nearby coral reefs.
» read on

Highlighted Application:
When traditional PUV processing of ADCP data can be more beneficial
» read on

ASA's COASTMAP used in Narragansett Bay Highlighted Application: ADCPs for Real-Time Observatories
ASA's COASTMAP used in Narragansett Bay Real-Time Observation System >>read full story

ADCPs for treasure hunting Highlighted Application:ADCPs aid in Treasure Hunt
...The ship sank at the entrance to a channel between two of the islands. Heavy tidal currents, funneled through the islands, are exacerbated by strong winds. Once the Sauternes was located, approximately 100m down, a self-contained RD Instruments 300kHz Workhorse Sentinel ADCP™ was bottom-mounted in the area to determine the patterns of current fluctuation.  >>Read full story

ADCPs on ROVs Highlighted Application:
Innovative ROV/ADCP Combination Extends Range
Fugro GEOS Innovation in Gulf of Mexico
Fugro GEOS had a problem: their client BHP was about to drill the second-deepest well in the world, on the Walker Ridge Block in the Gulf of Mexico. The well was located at a depth of 2680m (8800 feet) in an area where water currents could threaten the marine riser. Traditional ADCP (acoustic Doppler current profiler) current measurement equipment could only reach up a little over 1000 meters in good conditions. What to do?

Get innovative, that’s what.  >>read full story

ADCPs on rigs Highlighted Application: ADCP Data Helps Moves Big Rig
Imagine the costs and risks involved in moving an oil-drilling rig to a location affected by both tidal currents and the Gulf Stream.   or a recent operation, Coastal Ocean Associates (COA) of Nova Scotia used a new approach. They installed a downward-looking 300 kHz Workhorse Sentinel ADCP™ on a buoy moored adjacent to the destination production platform. >>read full story

H-ADCP application Highlighted Application:
ADCPs for marine renewable energy projects
>>read on

  Highlighted Application: ADCP for Sediment Concentration
Acoustic Doppler current profilers (ADCP) are becoming the standard for measuring current speed both at stationary locations and as ship-borne, moving sensors. Over the past decade there has been increased activity in developing methods to measure SSC using acoustic backscatter intensity from such acoustic current profiling systems. >> read more


Have an application you'd like to share?
We'd love to hear from you! (And, as a token of our appreciation, we'll send you a special gift!)
Please fill in this brief online form; and e-mail any accompanying photos or data sets to
Short on time? Contact Margo to schedule a quick telephone interview.


Sentinel ADCP Data Samples

Sentinel data


Sentinel data


Sentinel data



Sentinel ADCP FAQs (Frequently Asked Questions):

FAQs to follow soon.

Looking for more information?
Contact the Marine Measurements group for immediate assistance. >>contact info