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SonTek CastAway-CTD

The CastAway-CTD® is first handheld castable instrument that provides instantaneous profiles of temperature, salinity, and sound speed. Designed for coastal profiling, it incorporates a 6-electrode conductivity cell, coupled with a fast response

  • SonTek CastAway-CTD
SonTek
9940 Summers Ridge Rd
92121-3091 San Diego
United States of America
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Description

The CastAway-CTD® is first handheld castable instrument that provides instantaneous profiles of temperature, salinity, and sound speed. Designed for coastal profiling, it incorporates a 6-electrode conductivity cell, coupled with a fast response thermistor to provide accurate, high-resolution data to 100m.

Specifications

  • Year of initial development
    2010
  • Weight in air [kg]
    0.45
  • Diameter [mm]
    8.4
  • Length [mm]
    20.3
  • Max. depth [m]
    100
  • Max. pressure [bar]
    100
  • Battery type
    AA Alkaline
  • Battery duration [hr]
    40
  • Standard sensor
    Measures conductivity, temperature, pressure and includes GPS. Also, calculated salinity, sound speed, density, depth and specific conductivity.
  • Min. depth increment [m]
    0.01
  • Min. time increment [s]
    0.2
  • Resolution of salinity [psu]
    0.01
  • Uncertainty of salinity [psu]
    0.1
  • Min. sound velocity [m/s]
    1400
  • Max. sound velocity [m/s]
    1730
  • Resolution of sound velocity [m/s]
    0.01
  • Uncertainty of sound velocity [m/s]
    0.15
  • Max. conductivity [S/m]
    10
  • Resolution of conductivity [10^-3 S/m]
    0.001
  • Uncertainty of conductivity [10^-3 S/m]
    0.05
  • Min. temperature [°C]
    -5
  • Max. temperature [°C]
    45
  • Resolution of temperature [°C]
    0.01
  • Uncertainty of temperature [°C]
    0.05
  • Resolution of pressure [% FS]
    0.01
  • Uncertainty of pressure [% FS]
    0.25
  • Max. number of samples for self-recording [10^3]
    750
  • External recorder required
    N
  • Dedicated surface data logger
    N
  • Dedicated sub-surface data logger
    Y
  • Telemetry link to remote location
    Y
  • Data display on dedicated hardware
    Y
  • Display of analogue data
    Y
  • Method of first recording
    digital
  • Recording with third party software
    N
  • Software name
    CastAway - CTD
  • Graphical presentation
    Y
  • Raw data editing
    Y
  • Re-computation with raw data
    Y
  • CTD Probe controller
    Y
  • Distinguishable features
    5Hz response time; 5Hz sampling rate; 6 electrode flow through cell design

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