Development of measuring units for vessels and buoys to detect water parameters

Aim of the BMBF project about the measuring system for ships of opportunity is the optimisation and qualification of a robust and sea water resistant flow path for ships for the on-line detection of water parameters. The Blue Box contains timely high precision sensors for temperature, conductivity, turbidity, oxygen, fluorescence (Chl.a content), and pH-value. The system will be sold in the future by the factory coordinator of the project GO Systemelektronik GmbH (Kiel).

Measuring unit of the Blue-BoxMeasuring sensors of the Blue-Box. © K. H. Vanselow, FTZ

Project description

Within the project FTZ works on the optimisation of the fluorometric algae group detection for marine phytoplankton. The used unit, the Algae online analyser (AOA), was created for limnical investigations by BBE Moldaenke GmbH (Kiel). The algae group differentiation acts by the analysis of the chlorophyll-fluorescence answer. The actinic light was created by five different wavelengths. The fluorescence answers will be distinguished by specific fingerprints of different algae groups of known algae.

The optical nitrate sensor ProPS from the manufacturer TriOS GmbH (Oldenburg) was integrated successfully in the system. In the Wadden Sea area we now can realise an accuracy of 2 µmol/litre nitrate by optimising and adapting the fit routines.

Funded by:


Funding period:

09.2003 to 11.2005


Dr. Klaus H. Vanselow, Dr. A. Ruser