SEAGUARD® O2 Oxygen Recorder The new AADI SEAGUARD® O2 is a robust instrument based on the SEAGUARD® Platform. It is a self contained instrument for measuring oxygen concentration. The instrument can be used as a platform for additional measurements (like e.g. CTD, current, turbidity, wave and tide). Features of the SEAGUARD® O2: • High Resolution and low drift • Low maintenance needs • Optical measurement principle • Long time stability • More than one year without recalibration • Selectable interval from 2 seconds to 2 hours • SEAGUARD® Studio vizualisation software • Smart sensor topology based on a reliable CANbus interface (AiCaP) • Output parameters: O2 concentration in mM, the Air Saturation in % and the Temperatur in °C. • Real-Time XML Output on RS-422(optional) • For use in sea and fresh water • Windows CE based datalogger with TFT based colour touch panel for configuration • 300m/2000m/6000m versions Since oxygen is involved in most of the biological and chemical processes in aquatic environments, it is the single 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. • n shallow coastal areas with significant algae blooms. I • n fjords or other areas with limited exchange of water. I • round fish farms. A • n areas interesting for dumping of mine or dredging waste. I 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. A black optical isolation coating protects the complex from sunlight and fluorescent 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. AADI is a trademark of Xylem Inc. or one of its subsidiaries. The lifetime-based luminescence quenching principle offers the following advantages over electro-chemical sensors: • ot stirring sensitive (it consumes no oxygen). N • ess affected by fouling. L • easures absolute oxygen concentrations without M repeated calibrations. • etter long-term stability. B • ess affected by pressure. L • ressure behaviour is predictable. P • aster response time. F The output parameters from the SEAGUARD® O2 are easily presented in SEAGUARD Studio. The SEAGUARD® O2 and the AADI smart sensors are interfaced by means of a reliable CANbus protocol (AiCaP) using XML for plug and play capabilities. The smart sensors can be mounted directly on the top end plate of an AADI SEAGUARD® and are automatically detected and recognized. The SEAGUARD® O2 can be used with AADI Real-Time Collector for Real-Time data.

Top-End Plate: Recording system: Storage Capacity: Battery: Alkaline 3988 Multiparameter platform Data Storage on SD card ≤ 4GB 2 batteries inside the instrument 9V, 15Ah (nominal 12.5Ah; 20W) down to 6V at 4°C) or Lithium 3908: 7V, 35Ah Supply voltage: 6 to 14Vdc Operating temperature: -5 – +40˚C (23 – 104˚F) Deployment depth: Shallow Water (SW): 0 - 300m (0 - 984.3ft) Intermediate Water (IW): 0 - 2000m (0 - 6590ft) Deep Water (DW): 0 - 6000m (0 - 19690ft) Platform Dimensions: Shallow Water (SW): H: 356mm OD: 139mm Intermediate Water (IW): H: 352mm OD: 140mm Deep Water (DW): H: 368mm OD: 143mm...