Instrumented buoy

nke produces and installs instrumented buoys for real time or differed measurement of sea water and environmental parameters.

Main characteristics :

• Implementation in coastal areas, estuary, river, lake ...
• Low consumption autonomous system : power provided by batteries and solar panel.
• Data transmission via radio link or cellular telephone network (TCP/IP protocol), secured transmission.
• Remote control for the operation of the sub-assemblies.
• Large storage capacity of the measurements within the buoy (longer than 1 year).
• Onshore data retrieval and archiving onto computer, link towards client network.

Possible instrumentation for the measurement of the parameters :

• Temperature : multi-sensor chain or fixed point.
• Current : integration of an Acoustic Doppler Current Profiler (ADCP).
• Water level : including atmospheric pressure compensation.
• Wave characterisation : parameters obtained from ADCP measurements.
• Meteorological : wind speed and direction, air temperature.
• Conductivity.
• Dissolved Oxygen.
• Turbidity.
• pH.
• Chlorophyll.

In 2005 nke has implemented 2 instrumented buoys in the Gironde estuary on behalf of EDF, for the monitoring of the reject water temperature from the Blayais nuclear power station.
This installation has been carried out in partnership with Mobilis.