BCO-DMO BlogInstrument: CTD Sea-Bird SBE 911plus
The Sea-Bird SBE 911 plus is a type of CTD instrument package for continuous measurement of conductivity, temperature and pressure. The SBE 911 plus includes the SBE 9plus Underwater Unit and the SBE 11plus Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 plus and SBE 11 plus is called a SBE 911 plus. The SBE 9 plus uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 plus and SBE 4). The SBE 9 plus CTD can be configured with up to eight auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). more information from Sea-Bird Electronics
CTD/Hydrographic Measurements Program
Two types of rosette/SBE9plus CTD casts (65 SIOR/30L-Niskin and 40 GT-C/15L-GoFlo) were made at 22 station locations during GEOTRACES 2011.
13 shallow and 13 deep McLane pump profiles were done at all Full and Super Stations, with an SBE19plus CTD attached to the end of the wire.
SIOR/30L-Niskin Rosette/CTD casts were performed with a package consisting of a 12-bottle rosette
frame (SIO/STS), a 24-place carousel (SBE32) and 12 30L General Oceanics bottles with an absolute
volume of 30L each. Underwater electronic components consisted of a Sea-Bird Electronics SBE9plus
CTD with dual pumps (SBE5), dual temperature (SBE3plus), reference temperature (SBE35RT) dual
conductivity (SBE4C), dissolved oxygen (SBE43), transmissometer (WET Labs C-Star), fluorometer
(Seapoint SCF) and altimeter (Tritech LPRA-200 or Simrad 807). A second dissolved oxygen plus oxygen
temperature sensor (JFE Advantech RINKO-III) was incorporated into the data stream for future sensor
evaluation; it was not processed for this cruise
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