SBE 25 Sealogger CTD - DISCONTINUED

The SBE 25 was discontinued in 2012. Order the SBE 25plus in its place.

The list below includes (as applicable) the current product brochure, manual, and quick guide; software manual(s); and application notes.

For older SBE 25 product manuals, organized by instrument firmware version, click here.

Title Type Publication Date PDF File
SBE 25 Manual Product Manual Friday, January 22, 2010 25_017.pdf
NiMH Battery Pack and Charger Manual Product Manual Wednesday, June 29, 2016 NiMH_006.pdf
Seasave V7 Manual Software Manual Thursday, May 26, 2016 Seasave_7.26.0.pdf
SBE Data Processing Manual Software Manual Thursday, May 26, 2016 SBEDataProcessing_7.26.0.pdf
Field Service Bulletin 22: SBE 3 Frequency Shift with SBE 25 CTD and Cold Temperature Applications Field Service Bulletins Monday, June 20, 2011 FSB22.pdf
Field Service Bulletin 13: Jackscrew Replacements Field Service Bulletins Monday, March 8, 2010 FSB13.pdf
Field Service Bulletin 2: SBE 25 Damage from Transient Over-Voltage Condition Field Service Bulletins Monday, March 8, 2010 FSB2.pdf
SBE 25 Quick Guide Product Quick Guide Tuesday, March 27, 2007 25_referencesheet_003.pdf
Seasave V7 Quick Guide Software Quick Guide Tuesday, August 3, 2010 Seasave_ReferenceSheet_001.pdf
Technical Note: Avoiding Oil Contamination on Deployment in Oil Spill Technical Note Thursday, June 3, 2010 AvoidOilContaminationOnDeployment-General.pdf
Technical Note: Cleaning for CTDs used in Oil Spill Technical Note Thursday, July 21, 2011 SimpleCleaningProtocols_OilSpillRecovery_Jul2011.pdf
Technical Note: Oil Spill Deployment Protocols for SBE 25 and 25plus CTD Technical Note Thursday, June 3, 2010 SBE25_OilSpillDeploymentProtocols.pdf
AN02D: Instructions for Care and Cleaning of Conductivity Cells Application Notes Monday, June 13, 2016 appnote2DJun16.pdf
AN06: Determination of Sound Velocity from CTD Data Application Notes Tuesday, February 2, 2010 appnote06Aug04.pdf
AN10: Compressibility Compensation of Sea-Bird Conductivity Sensors Application Notes Tuesday, May 7, 2013 appnote10May13.pdf
AN12-1: Pressure Port Oil Refill Procedure and Nylon Capillary Fitting Replacement Application Notes Friday, September 12, 2008 appnote12-1Sep08.pdf
AN14: 1978 Practical Salinity Scale Application Notes Thursday, January 12, 1989 appnote14.pdf
AN15: TC Duct Assembly & Plumbing Installation Application Notes Friday, October 12, 2012 appnote15Oct12.pdf
AN16: Entering Calibration Coefficients for D&A Instruments (Campbell Scientific) OBS-3 Optical Backscatter Sensor Application Notes Thursday, September 18, 2014 appnote16Sep14.pdf
AN21: Instructions for Use of Nickel-Cadmium Battery Packs Application Notes Saturday, February 13, 2010 appnote21Feb10.pdf
AN27: Strain Gauge Pressure Sensor Error Sources - older instruments with Paine pressure sensors Application Notes Saturday, February 13, 2010 appnote27Feb10.pdf
AN27D: Minimizing Strain Gauge Pressure Sensor Errors Application Notes Wednesday, May 18, 2016 appnote27DMay16.pdf
AN31: Computing Temperature and Conductivity Slope and Offset Correction Coefficients from Laboratory Calibrations and Salinity Bottle Samples Application Notes Monday, June 13, 2016 appnote31Jun16.pdf
AN34: Instructions for Use of Conductivity Cell Filling and Storage Device PN 50087 and 50087.1 Application Notes Saturday, October 13, 2012 appnote34Oct12.pdf
AN36A: Installation of P/N 50094 Conductivity Cell Tubing Connector Kit Application Notes Monday, April 13, 1998 appnote36a.pdf
AN38: TC Duct Fundamentals Application Notes Tuesday, July 10, 2012 appnote38Jul12.pdf
AN42: ITS-90 Temperature Scale Application Notes Wednesday, May 18, 2016 appnote42May16.pdf
AN43: Universal Ni-Cad Battery Charger Operating Instructions Application Notes Friday, January 13, 1995 appnote43.pdf
AN57: Connector Care and Cable Installation Application Notes Tuesday, May 13, 2014 appnote57Jan14.pdf
AN59: A Load-Bearing Underwater Cable for Hand-Hauled, Real-Time Profiling Application Notes Thursday, October 11, 2012 appnote59Oct12.pdf
AN64-1: Plumbing Installation - SBE 43 DO Sensor and Pump on a CTD Application Notes Wednesday, April 16, 2008 appnote64-1Apr08.pdf
AN67: Editing Sea-Bird .hex Data Files Application Notes Monday, October 15, 2001 appnote67.pdf
AN68: Using USB Ports to Communicate with Sea-Bird Instruments Application Notes Friday, October 19, 2012 appnote68Oct12.pdf
AN69: Conversion of Pressure to Depth Application Notes Monday, July 1, 2002 appnote69.pdf
AN71: Desiccant Use and Regeneration (drying) Application Notes Wednesday, May 18, 2016 Appnote71May16.pdf
AN73: Using Instruments with Pressure Sensors at Elevations Above Sea Level Application Notes Thursday, May 19, 2016 appnote73May16.pdf
AN90: Absolute Salinity and TEOS-10: Sea-Bird's Implementation Application Notes Tuesday, September 3, 2013 AppNote90Sep13.pdf
AN94: Wide-Range Conductivity Calibration Application Notes Tuesday, June 4, 2013 Appnote94Jun13.pdf
AN95: Setting Up Teledyne Benthos Altimeter with Sea-Bird Profiling CTD Application Notes Sunday, January 12, 2014 Appnote95.pdf
Seaterm© is a terminal program for setup and data upload of a wide variety of older Sea-Bird instruments. Seaterm is part of our Seasoft V2 software suite.
Version 1.59 released October 10, 2007
Seaterm_Win32_V1_59.exe for Windows XP/Vista/7


Seasave V7© acquires, converts, and displays real-time or archived raw data from Sea-Bird profiling CTDs and thermosalinographs, as well as the SBE 16 family of moored CTDs. Seasave V7 is part of our Seasoft V2 software suite.
Version 7.26.2 released September 6, 2016
SeasaveV7.26.2-b13.exe for Windows XP/Vista/7


SBE Data Processing© consists of modular, menu-driven routines for converting, editing, processing, and plotting of oceanographic data acquired with Sea-Bird profiling CTDs, thermosalinographs, and the SBE 16 and 37 families of moored CTDs. SBE Data Processing is part of our Seasoft V2 software suite.
Version 7.26.2 released September 6, 2016


How accurate is salinity measured by my CTD? What factors impact accuracy?

One of the reasons that this is not a simple question is that there are several factors to take into consideration regarding the error margin for practical salinity measurements. Salinity itself is a derived measurement from temperature, conductivity, and pressure, so any errors in these sensors can propagate to salinity. For example, Oour initial accuracy specification for the SBE 3plus temperature sensor and SBE 4 conductivity sensor on an SBE 9plus CTD is approximately equivalent to an initial salinity accuracy of 0.003 PSU (note that conductivity units of mS/cm are roughly equivalent in terms of magnitude to PSU).

However, another issue to consider is that this accuracy is defined for a clean, well-mixed calibration bath. In the ocean, some of the biggest factors that impact salinity accuracy are 1) sensor drift from biofouling or surface oils for conductivity in particular and 2) dynamic errors that can occur on moving platforms, particularly when conditions are rapidly changing, which will be true for all sensors that measure salinity. Sea-Bird provides recommendations, design features such as a pumped flow path, and data processing routines to align and improve data for the salinity calculation to account for thermal transients and hysteresis, and to match sensor response times.  Depending on the environment and the steepness of the gradient, and after careful data processing, this may continue to have an impact on salinity on the order of 0.002 PSU or more, for example. For more details, see Application Note 82.

Lastly, note that salinity in PSU is calculated according to the Practical Salinity Scale (PSS-78), which is defined as valid for salinity ranges from 2 – 42 PSU.

Many cables, mount kits, and spare parts can be ordered online.

Cables

  • 801380 To computer COM port (from XSG connector), shielded, 20 m, DN 31222
    Note: 801380 connects to 4-pin end of Y-cable 17709.
  • 801225 To computer COM port (from XSG connector), 2.4 m, DN 32421
    Note: 801225 connects to 4-pin end of Y-cable 17709.
  • 801421 To computer COM port (from Wet-pluggable connector), shielded, 20 m, DN 32789
    Note: 801421 connects to 4-pin end of Y-cable 171883.
  • 801374 To computer COM port (from Wet-pluggable connector), 2.4 m, DN 32715
    Note: 801374 connects to 4-pin end of Y-cable 171883.
  • Part # varies with length, To computer COM port, load-bearing cable (from XSG connector), DN 32284 (also see Application Note 59)
    Note: Load-bearing cable connects to 4-pin end of Y-cable 17709.
  • Part # varies with length, To computer COM port, load-bearing cable (from Wet-pluggable connector), DN 32643 (also see Application Note 59)
    Note: Load-bearing cable connects to 4-pin end of Y-cable 171883.
  • 17086 To SBE 3 or SBE 4 (RMG connectors), 0.64 m, DN 30566
  • 171669 To SBE 3 or SBE 4 (Wet-pluggable connectors), 0.76 m, DN 32671
  • 17709 To SBE 5M, 5T, or 5P (Y-cable to pump and data I/O, RMG/AG connectors), DN 31551
  • 171883 To SBE 5M, 5T, or 5P (Y-cable to pump and data I/O, Wet-pluggable connectors), DN 32896
  • 17595 To SBE 18 (RMG/AG connectors), 1.1 m, DN 30918
  • 171828 to SBE 18 (Wet-pluggable connectors), 1.1 m, DN 32845
  • 171704 To SBE 27 (AG connectors), 1.1 m, DN 31749
  • 171826 To SBE 27 (Wet-pluggable connectors), 1.1 m, DN 32844
  • 17168 To SBE 29 (AG connectors), 1.1 m, DN 30568
  • 171798 To SBE 29 (Wet-pluggable connectors), 1.0 m, DN 32758
  • 17595 To SBE 18 (RMG/AG connectors), 1.1 m, DN 30918
  • 171704 To SBE 27 (AG connectors), 1.1 m, DN 31749
  • 17292 To SBE 32 (RMG connectors), 2 m, DN 30567
  • 171912 To SBE 32 (Wet-pluggable connectors), 2 m, DN 32810
  • 172447 To SBE 43 (RMG/AG connectors), 1.1 m, DN 32496
  • 172448 To SBE 43 (Wet-pluggable connectors), 1.1 m, DN 32654
  • 172259 To SBE 55 (RMG/AG connectors), 1.2 m, DN 33191
  • 172260 To SBE 55 (Wet-pluggable connectors), 1.2 m, DN 33192
  • 17821 To Auto Fire Module (AFM) (RMG connectors), 1.2 m, DN 31670
  • 17884 To Auto Fire Module (AFM) (RMG connectors), 1.8 m, DN 31670
  • 171846 To Auto Fire Module (AFM) (Wet-pluggable connectors), 1.8 m, DN 32859
  • 17088 To Power & Data Interface Module (PDIM), (RMG connectors), 1.1 m, DN 30567
  • 171792 To Power & Data Interface Module (PDIM), (Wet-pluggable connectors), 1.1 m, DN 32810
  • 171130 To Benthos/Datasonics PSA-916 (from AG connector), 1.8 m, DN 32075
  • 17610 To Biospherical QSP-200L or QSP-2300L (from AG connector), 2 m, DN 30701
  • 17342 To Biospherical QSP-200PD (from AG connector), 1.1 m, DN 30922
  • 171640 To Biospherical QSP-2200 (from AG connector), 1.5 m, DN 32648
  • 17602 To Chelsea AquaTracka or AlphaTracka (from AG connector), 1.2 m, DN 31253
  • 17361 To D&A OBS-3 (from AG connector), 0.76 m, DN 30954
  • 172130 To D&A OBS-3+ (from AG connector), High & Low range, 1 m, DN 33080
  • 172131 To D&A OBS-3+ (from Wet-pluggable connector), High & Low range, 1 m, DN 33081
  • 172109 To D&A OBS-3+ (from AG connector), Low range (1X), 1 m, DN 33058
  • 172111 To D&A OBS-3+ (from Wet-pluggable connector), Low range (1X), 1 m, DN 33060
  • 172110 To D&A OBS-3+ (from AG connector), High range (4X), 1 m, DN 33059
  • 172112 To D&A OBS-3+ (from Wet-pluggable connector), High range (4X), 1 m, DN 33061
  • 17343 To Li-Cor 192-SA/193-SA (from 25/25plus AG connector), 1.1 m, DN 30923
  • 172215 To Satlantic SatPAR (from AG connector), 2 m, DN 32628
  • 172214 To Satlantic SatPAR (from Wet-pluggable connector), 2 m, DN 32654
  • 171099 To Seapoint fluorometer or turbidity meter (1X) (from V2 AG connector), 1.1 m, DN 32073
  • 171147 To Seapoint fluorometer or turbidity meter (3X/5X) (from AG connector), 1.1 m, DN 32101
  • 172221 To Seapoint fluorometer or turbidity meter (10X/20X) (from AG connector), 1.1 m, DN 31933
  • 171845 To Seapoint fluorometer or turbidity meter (30X/100X) (from AG connector), 1.1 m, DN 31924
  • 171908 To Turner Cyclops-7 (1X) (from AG connector), 1.1 m, DN 32910
  • 171907 To Turner Cyclops-7 (10X) (from AG connector), 1.1 m), DN 32909
  • 171909 To Turner Cyclops-7 (100X) (from AG connector), 1.1 m, DN 32911
  • 171418 To Turner SCUFA (from AG connector), 1.1 m, DN 32417
  • 17876 To WET Labs C-Star or WETStar with old-style 4-pin connector (from AG connector), 1.1 m, DN 31725
  • 171953 To WET Labs ECO-AFL, ECO-FL, C-Star, or WETStar with new-style 6-pin connector (from AG connector), 1.1 m, DN 32491
  • 172437 To WET Labs ECO-AFL, ECO-FL, C-Star, or WETStar with new-style 6-pin connector (from Wet-pluggable connector), 1.1 m, DN 32853
  • 171869 To WET Labs ECO-FL-NTUS or ECO-FL-NTU(RT) (from AG connector), 1.1 m, DN 32812
  • 172285 To WET Labs ECO-FL-NTUS or ECO-FL-NTU(RT) (from Wet-pluggable connector), 1.1 m, DN 32846
  • 17015 To AC power supply from NiMH Battery Charger (U.S. Standard)
  • 801509 To NiMH battery pack (from NiMH Battery Charger), DN 32935

Mount Kits

To SBE 32
50121 SeaCAT/Sealogger/AFM to SBE 32 Bottle Position Mount Kit (document 67020)

To SBE 55
50422 SBE 55 Universal CTD / Electronics Installation Kit (document 67179)

Spare Parts

Batteries

  • 801511 9 NiMH cells in rechargeable drop-in pack (10.8V/8 Ah)
  • 90504 NiMH battery charger for 6, 9, or 12 cells / 8 Ah D-cell packs. Provides full recharge in 2 hours, includes AC power cord & battery charging cable
  • 801641 9 Ni-Cad cells in drop-in rechargeable pack (10.8V/4.4 Ah)
    Note: As of 2011, Sea-Bird does not manufacture the 90226 Ni-Cad battery charger, because parts are no longer available. We are still able to provide the battery pack, for customers who already have a charger.

Hardware & O-ring Kits

  • 50069 Small hardware & O-ring kit for SBE 25 (document 67030)
  • 60021 Battery end cap hardware & O-ring kit for SBE 16/16plus/16plus-IM/16plus V2/16plus-IM V2, 17plus, 19/19plus/19plus V2, 25, 26/26plus, 53, 54, 55, or AFM (document 67042)
  • 50026 Magnetic switch kit for SBE 19 or 25 (document 67035)
  • 50246 Conductivity disconnect fitting spare O-ring kit
  • 50092 Jackscrew kit for SBE 16, 17plus, 19, 21, 25, 26/26plus, 52-MP, 53, 54, AFM, or PDIM
  • 90199 CTD plumbing kit (document 67022)
  • 90088 CTD plumbing & TC duct tubing kit (document 67018)
  • 90085 TC duct & plumbing kit (document 67051)
  • 50025 Pressure sensor oil refill kit (document 67066)
  • 50332 Support kit for SBE 25 with XSG/AG connectors (hardware, O-rings, cables, connectors, dummy plugs, zinc anodes, etc.) (document 67127)
  • 50331 Support kit for SBE 25 with wet-pluggable connectors (hardware, O-rings, cables, connectors, dummy plugs, zinc anodes, etc.) (document 67126)

Cage

  • 23302C SBE 25 stainless steel protective cage

Miscellaneous