Concept
Aanderaa Oxygen Optode 4130
| URI | http://vocab.nerc.ac.uk/collection/L22/current/TOOL0102/ |
|---|---|
| Within Vocab | SeaVoX Device Catalogue |
| Preferred Label | Aanderaa Oxygen Optode 4130 |
| Definition | A dissolved oxygen sensor for use with Aanderaa data loggers. 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.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. |
| Broader |
L05:
dissolved gas sensors |
| Related |
B75:
Aanderaa Data Instruments AS L35: Aanderaa |
| Note | accepted |
| Deprecated | false |
| Alternative Label | AA Optode 4130 |
| Version | 1 |
| Has Current Version | http://vocab.nerc.ac.uk/collection/L22/current/TOOL0102/1/ |
| Authored On | 2010-05-18 16:10:58 |
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