Description
The Thetis Profiler is a submersible vertically profiling platform for use in coastal marine and fresh water environments. The purpose of the platform is to sample the water column distributions of physical, biological, chemical and optical properties at a fixed geographical location over extended periods of time.
Specifications
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General
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Type
Moored buoy
Year of introduction
2014
Length [m]
0.7875
Width [m]
0.7875
Height [m]
2.12
Antenna/mast height [m]
2
Hull material
6061-T6 Aluminum
Structure Material
6061-T6 Aluminum, Titanium,316 Stainless Steel,Acetal, HDPE
Ballast
10 kg (25 lb) net buoyancy
Weight [kg]
159
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Power Supply
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Battery
Y
Battery type
Rechargeable Lithium-Ion
Solar panels
No
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Software
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Type of mission planning software
Windows 7 and newer interface
Type of postprocessing software
Windows 7 and newer interface
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Wave and tide variables sensors
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Wave frequency
optional
Wave height
optional
Wave period
optional
Wave direction
Optional
Current speed
optional
Current direction
optional
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Operation Characteristics
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Operating temperature: min. [°C]
0
Operating temperature: max. [°C]
40
Deployment methods
Ship
Min deployment depth [m]
3
Max deployment depth [m]
100
Min weight of mooring
Deadweight anchor recommendations: Use a single lump of steel. Weight in air should be 45 to 60 kg (100 to 130 lb). (In water, steel weighs about 78% of its weight in air.)
Max weight of mooring
All-chain anchor recommendations: Use 12 m (40 ft) of 16 mm (5/8”) galvanized steel chain. This will weigh about 6 kg/m (4 lb/ft) in air. Weight in water will be about 4.7 kg/m (3.1 lb/ft). Assuming your profiler is 9 kg buoyant, it will lift 1.9 m of chain off the bottom under static conditions. When a wave orbital pulls the profiler up, it will gradually pull additional chain from the bottom. As the orbital passes, the excess chain will gently return the profiler to an equilibrium position. Actual chain weight will vary depending on the grade. Verify chain weight per length with your chain supplier.
Max wave conditions [m]
5
Max operating time
Depends upon Instrument payload, depth, and profiling period.
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Positioning and navigation
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Navigation lights
Yes
Navigation lights description
Orange colored strobe beacon for nighttime surfacing.
Other sensors or additional information
Sea-Bird Scientific Sensors: ECO, ac-s, C-Star, radiometers, SBE49, SUNA V2, SBE 43/63Nortek Aquadopp
GPS sensor
Y
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Water variables sensors
-
Max. depth rating of sensors
350
Water depth
Yes
Water temperature
Yes
Water salinity
Yes
Water turbidity
Yes
Chromophoric dissolved organic matter (CDOM)
Yes
Nitrate
optional
Dissolved oxygen
optional
Chlorophyll
Yes
Underwater radiance
optional
Sound Velocity
optional
Other sensors or additional information
Base System Instruments: SBE49 (CTD), ECO-BBFL2w, PAR. Base System: Frame and flotation, winch, morring controllor, Battery pack, GPS & antenna, strobe. Software: Host, file processor, mission planning
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Atmospheric and solar variables
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Air temperature
No
Air humidity
No
Barometric pressure
No
Wind speed
No
Wind direction
No
Solar radiation
No
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Application and Use
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Training facilities
Yes, optional
Main applications
The Thetis Profiler is a submersible vertically profiling platform for use in coastal marine and fresh water environments.
Distinguishable features:
• Modular, self-contained, winch-driven profiling platform • Integrated control, power, and telemetry systems • Full suite of available physical, chemical and biological sensors
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Communication and data
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Data logger description
Custom designed data logger and controller.
Acoustic communication
No
Iridium/Satellite communication
optional
Cellular comunication
optional
UHF/VHF communication
Yes
Other sensors or additional information
The base profiler comes with Freewave UHF line-of-sight communications. Cellular and Iridium communications are optional (where laws allow). Only one type of communication can be installed on the profiler.
Web based control and tracking
Videos
