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. • In shallow coastal areas with significant algae blooms • In fjords or other areas with limited exchange of water • Around fish farms • Areas 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: • Not stirring sensitive (it consumes no oxygen) • Less affected by fouling • Measures absolute oxygen concentration without repeated calibrations • Better long-term stability • Less affected by pressure • Pressure behaviour is predictable • Faster 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

O2-Concentration Air Saturation 1) 0 – 500 µM 0 - 150% < 1 µM 0.4 % 2) 3) <8 µM or 5% <5 % whichever is greater Response Time (63%): 4330F (with fast response foil) <8 sec 4330 (with standard foil) <25 sec Temperature: Range: -5 to +40°C (23 - 104˚F) Resolution: 0.01°C (0.018°F) 4) Accuracy: ±0.03°C (0.18°F) Response Time (63%): <2 sec Output format: AiCaP CANbus, RS-232 Output Parameters: O2-Concentration in µM, Air Saturation in %, Temperature in °C, Oxygen raw data and Temperature raw data Sampling interval: 2s – 255 minutes Supply voltage: 5 to 14 Vdc Current drain: Average: 0.16 +48 mA/S...