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SBE 911plus CTD

The SBE 911plus CTD is the primary oceanographic research tool used by the world’s leading institutions, providing 24 Hz sampling with an SBE 9plus CTD Unit and SBE 11plus V2 Deck Unit . The 911plus system provides real-time data colle

Sea-Bird Scientific
13431 NE 20th Street
98005 Bellevue
United States of America
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Description

The SBE 911plus CTD is the primary oceanographic research tool used by the world’s leading institutions, providing 24 Hz sampling with an SBE 9plus CTD Unit and SBE 11plus V2 Deck Unit . The 911plus system provides real-time data collection over 10,000 meters of cable (single- or multi-conductor electro-mechanical sea cable, slip-ring equipped winch, and computer for data display and logging supplied by user). The 911plus is easily integrated with an SBE 32 Carousel Water Sampler for real-time or autonomous auto-fire operations. The 911plus’ pump-controlled, T-C ducted flow minimizes salinity spiking caused by ship heave and allows for slow descent rates without slowing sensor responses, improving dynamic accuracy and resolving small scale structure in the water column. One Conductivity and one Temperature sensor (fitted with TC Duct and constant-flow pump) are included. An optional second (redundant) pair of T and C sensors and pump can be easily installed. The 911plus supports numerous auxiliary sensors with eight A/D channels.

Specifications

  • Year of initial development
    1980
  • Weight in air [kg]
    29.00
  • Diameter [mm]
    30
  • Length [mm]
    100
  • Max. cable length [m]
    10500
  • Max. depth [m]
    10500
  • Max. pressure [bar]
    1050
  • Battery type
    alkaline or Nicad in optional Searam battery pack
  • Battery duration [hr]
    12
  • Standard sensor
    Conductivity; Temperature; Pressure
  • Description of additional sensors
    dissolved oxygen, pH, fluorescence, PAR, light transmission, optical backscatter, and other voltage-output sensors, plus optional RS-232 sensor
  • No. of additional sensors
    9
  • Max. conductivity [S/m]
    7
  • Resolution of conductivity [10^-3 S/m]
    0.04
  • Uncertainty of conductivity [10^-3 S/m]
    0.3
  • Min. temperature [°C]
    -5
  • Max. temperature [°C]
    35
  • Resolution of temperature [°C]
    0.0002
  • Uncertainty of temperature [°C]
    0.001
  • Resolution of pressure [% FS]
    0.001
  • Uncertainty of pressure [% FS]
    0.015
  • Max. number of samples for self-recording [10^3]
    1333
  • External recorder required
    N
  • Display of analogue data
    Y
  • Software name
    Seasoft
  • Graphical presentation
    Y
  • Raw data editing
    Y
  • Re-computation with raw data
    Y
  • CTD Probe controller
    Y
  • Distinguishable features
    Used by leading oceanographic institutions; known for performance; reliability; ease-of-use; 24Hz sampling.

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