The first experiment of autonomous and high frequency measurements at the station biologique de Roscoff, were obtained throughwas the implementation, on thebottom, of SBE 39 mooring systems, from Sea-bird inc, on the sea floor.
The first point locationwas located near the Bloscon cardinal buoy, which was installedin 2003. The sensor, protected by a stainless frame, is fixed on a concrete platform at 19 m depth.
Measurements are made every 10 minutes. The water column height is also measured too during the scheduled cycle scheduled (pressure measurement) : this parameter provides data on the tidal cycles.
These sensors are removed by divers every 3 months for maintenance:anti-fouling, batteries battery replacement….
sensors specifications :
Measurement Range : Temperature -5 to +45 °C
Initial Accuracy : Temperature ± 0.002 (-5 to +35 °C); ± 0.01 (+35 to +45 °C)
Optional Pressure ± 0.1% of full scale range
Typical Stability : Temperature 0.0002 °C per month
Optional Pressure 0.05% of full scale range per year
Resolution : Temperature 0.0001 °C
Optional Pressure 0.002% of full scale range