Oxygen optodes 4330/4330F0 pages

Oxygen Optode 4330/4330F
is a compact fully integrated sensor for
measuring the O2-concentration.
Fast Response Foil (4330F, refer overleaf)
Advantages:
• Optical measurement principle
• Lifetime-based luminescence quenching
principle
• Long time stability
• More than one year without recalibration
• Low maintenance needs
• User friendly
• Use with AADI SEAGUARD® Platform
• Automatically detected and recognized
• Use as stand-alone sensor
• Output format: CANbus AiCaP, RS232
• Three depth ranges maximum 6000 meter

Since oxygen is involved in most of the
biological and chemical processes in aquatic
environments, it is one of the most important
parameter needed to be measured. Oxygen
can also be used as a tracer in oceanographic
studies. For environmental reasons it is critical
to monitor oxygen in areas where the supply
of oxygen is limited compared to demand
e.g.
•tIn shallow coastal areas with significant
algae blooms
•tIn fjords or other areas with limited exchange
of water
•tAround fish farms
•tAreas of interest for dumping of mine or
dredging waste
The AADI Aanderaa oxygen optodes are
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. For the standard version
4330 a black optical isolation coating protects
the complex from sunlight and fluorescent

AADI is a trademark of Xylem Inc. or one of its subsidiaries.

particles in the water. This sensing foil is
attached to a sapphire window providing
optical access for the measuring system from
inside a watertight housing.
The lifetime-based luminescence quenching
principle offers the following advantages
over electro-chemical sensors:
•tNot stirring sensitive (it consumes no oxygen)
•tLess affected by fouling
•tMeasures absolute oxygen concentration
without repeated calibrations
•tBetter long-term stability
•tLess affected by pressure
•tPressure behaviour is predictable
•tFaster response time
The oxygen optode outputs data in
AiCaP CANbus and RS-232. The sensor can
present the O2 concentration in µM, the Air
Saturation in % and the Temperature in °C.
The SEAGUARD® data logger and the smart
sensor are interfaced by means of a reliable
CANbus interface (AiCaP), using XML for
plug and play capabilities.
D378 - Feb 2012