Thetis Profiler

The Thetis Profiler is a submersible, vertically profiling platform for use in coastal marine and fresh water environments.

The WET Labs, Inc Thetis Profiler is an autonomous moored profiler that is a submersible vertically profiling platform for use in marine to freshwater water bodies.  The platform is designed to sample the water column distributions of physical, biological, chemical and optical properties at a fixed geographical location over extended periods of time, providing sub-meter scale vertical resolution over the water column.   The Thetis design includes a modular, self-contained, winch-driven profiling platform with an integrated control system, a power system, and a telemetry unit. It is designed to carry a number of physical, optical and biological sensors, with expansion ports for up to a total of 8 instruments. Since the Thetis is a completely self-contained profiler the recovery, deployment and maintenance of the unit is greatly simplified.

Key aspects:

  • Operates in water depths of 5-100 m
  • Can profile in horizontal water current speeds up to 0.65 m/s
  • User configurable profiling speeds (1-30cm/s)
  • Freewave, Iridium, and cell telemetry options available
  • Supports a suite of science instrumentation
  • Easily deployable from a small vessel
  • Remote control of profiling mission parameters


University of Minnesota uses AMP in the Great Lakes:

First Continuous Data Collection In Lake Superior


Most Recent Data

WET Labs scientists, Michael Twardowski and James Sullivan, recently deployed an AMP system off San Diego, CA as part of an Office of Naval Research project to support real-time collection of optical data for model performance prediction.  The profiler was deployed in ~ 30m water depth on 19 September 2012, located about 1km offshore of the Scripps Institute of Oceanography pier, offshore of La Jolla, CA.  The science sensor suite included a CTD, downwelling irradiance, chlorophyll fluorometer, backscattering, and beam attenuation sensors.  A RF radio link was used for real-time data offload and control of the AMP.  The AMP typically performed 4 profiles per day during the daylight hours. The profiler was recovered on 12 December 2012. The plots show the time series of some of the data collected over the 95 day deployment.   AMP was serviced in early November to replace the on board batteries.



Application Note

Thetis Profiler Application Note

Thursday, October 3, 2013
Thetis Coastal Profiler Description v8.pdf
Application Note

Thetis Anchor Rigging and Deployment Instructions

Friday, March 27, 2015
Thetis Anchor Rigging and Deployment Instructions.pdf
Product Brochure

Thetis Profiler Summary Brochure

Tuesday, October 14, 2014
Product Datasheet

Thetis profiler datasheet

Monday, December 5, 2016
Technical Note

Cable and Bulkhead Connector Maintenance

Thursday, March 9, 2017

What should I use to lubricate bulkhead connectors?

WET Labs recommends keeping the connectors on your meter lubricated using a good quality silicone spray lubricant, such as 3M Silicone Spray or Loctite 8021 spray. These can be purchased at your local hardware store. Avoid silicone grease. It is messy and attracts contaminants. 

Do not use WD-40. It will destroy connectors.