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The University of Southampton

Research project: Denuault: Electrochemical sensors for Oceanography

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In collaboration with the Ocean Engineering Division at the National Oceanography Centre Southampton we are developing microelectrode dissolved oxygen sensors for the measurement of deep sea oxygen profiles.

The figures illustrate a prototype which we successfully tested in the laboratory and deployed on a conductivity, temperature, depth (CTD) probe. This sensor was based on the steady state response of microdisc electrodes. We are currently investigating new sensors based on the transient response of the microdiscs.

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Electrochemical DO sensor: (i) schematics of the flow cell and electrodes, (ii) device mounted on the fin of a CTD, (iii) close up of the device.




Sosna, Oxygen Reduction at Microelectrodes: Application to the Dissolved Oxygen Sensor for in situ Oceanographic Measurements, PhD thesis, University of Southampton, Southampton, 2006.

Sosna, Denuault, Pascal, Prien and Mowlem, Development of a reliable microelectrode dissolved oxygen sensor, Sensors and Actuators B, 123, 2007, 344-351.

Sosna, Denuault, Pascal, Prien, Mowlem, Field assessment of a new membrane-free microelectrode dissolved oxygen sensor for water column profiling. Journal of Limnology and Oceanography: Methods, 6, 2008, 180–189.

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