Concept
Aanderaa 4835 oxygen optode
| URI | http://vocab.nerc.ac.uk/collection/L22/current/TOOL2179/1/ | ||
|---|---|---|---|
| Within Vocab | SeaVoX Device Catalogue | ||
| Alternative Labels | AA optode 4835 | ||
| Definition | A dissolved oxygen sensor designed to mount on an Aanderaa SeaGuard or SmartGuard platform or be used as a stand alone sensor. 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 300 m). 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 < 4 uM or 3 %. | ||
| Date | 2025-06-26T13:58:47 | ||
| Identifier | SDN:L22::TOOL2179 | ||
| Note | accepted | ||
| Is Version Of | TOOL2179 | ||
| version | 1 | ||
| Broader | L05:351 |
dissolved gas sensors | |
| Related | L35:MAN0007 |
Aanderaa | |
B75:ORG00228 |
Aanderaa Data Instruments AS | ||
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