Conductivity, Temperature and Depth The new AADI SEAGUARD® CTD is a robust instrument based on the SEAGUARD® Platform. It is a self contained instrument for measuring conductivity, temperature and depth. The instrument can be used as a platform for additional measurements (like e.g. current, dissolved oxygen, turbidity, wave and tide). Advantages: • High Resolution and low drift • Low maintenance needs • Selectable interval from 2 seconds to 2 hours • SEAGUARD® Studio vizualisation software • Smart sensor topology based on a reliable CANbus interface (AiCaP) • Output parameters: Pressure, Temperature, Conductivity. The CTD also provides raw data of the Pressure, Temperature and Conductivity measurements. • Windows CE based datalogger with TFT based color touch panel for configuration • Real-time XML Output on RS-422(optional) • For use in sea and fresh water • 3 Measurement ranges: 0 - 300m, 0 - 2000m, 0 - 6000m The SEAGUARD® CTD is a primary tool for determining essential physical properties of sea and fresh water. Standard parameters are Conductivity, Pressure/ Instrument depth and Temperature. From these parameters the salinity of the water as well as the density are calculated. The SEAGUARD® CTD is designed for continuous recordings of salinity (via conductivity measurements), temperature and depth (via pressure measurements) used in long term deployments. Typical application areas are related to e.g. coastal circulation, climatic studies and aquaculture. The SEAGUARD® CTD can also be used as a multi-parameter platform for additional measurements. The included Conductivity Sensor (4319B) is an intelligent sensor based on an inductive principle. This provides for stable measurement with­ ut electrodes that are o easily fouled and may wear out in the field. The included Temperature Sensor (4880/4060) is an intelligent sensor based on a thermistor-bridge. AADI is a trademark of Xylem Inc. or one of its subsidiaries. The included Pressure Sensor (4646/4117) is a compact yet intelligent sensor based on a silicon piezoresistive bridge sampled and temperature compensated by an advanced Digital Signal Processor. The output parameters from the SEAGUARD® CTD are easily presented in SEAGUARD® Studio. Salinity, Density, Depth and Sound of speed is post- calculated in SEAGUARD® Studio. The SEAGUARD® CTD 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® CTD can be used with AADI Real-Time Collector for real-time data. The SEAGUARD® CTD has 2 battery compartments for long deployment time.

Top-end Plate: Recording system: Storage capacity: Battery: Multiparameter platform Data Storage on SD card ≤ 2GB 1 or 2 batteries inside the instrument Alkaline 3988 9V, 15Ah (nominal 12.5Ah; 20W down to 6V at 4°C) or Lithium 3908: 7V, 35Ah Supply voltage: 6 to 14VDdc 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): OD: 139mm H: 356mm Intermediate Water (IW): OD: 140mm H: 352mm Deep Water (DW): OD: 143mm H:...