Concept
Aanderaa Oxygen Optode 3930 oxygen sensor
| URI | http://vocab.nerc.ac.uk/collection/L22/current/TOOL1421/1/ | |
|---|---|---|
| Within Vocab | SeaVoX Device Catalogue | |
| Alternative Labels | Aanderaa Oxygen Optode 3930 | |
| Definition | A dissolved oxygen sensor which can be connected via cable to AADI SR10/VR22 Data logger. Measurement based on the ability of selected substances to act as dynamic fluorescence quenchers. The fluorescent indicator is a special platinum porphyrin complex embedded in a gas permeable foil that is exposed to the surrounding water. A black optical isolation coating protects the complex from sunlight and fluorescent particles in the water. This sensing foil is attached to a window providing optical access for the measuring system from inside a watertight titanium housing (depth rating 6000m). The foil is excited by modulated blue light, and the phase of a returned red light is measured. By linearizing and temperature compensating, with an incorporated temperature sensor, the absolute O2 concentration can be determined. Accuracy < 8uM or 5% (whichever is greater). | |
| Date | None | |
| Identifier | TOOL1421 | |
| Note | accepted | |
| Is Version Of | TOOL1421 | |
| version | 1 | |
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