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SBE 25 SEALOGGER CTD
Configuration Details

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Brochure/specifications     Manual     Reference Sheet

Note: We do not publish prices on the website. Please contact us [seabird@seabird.com or (+1) 425-643-9866] for pricing.

Part # Description Notes
25 SEALOGGER CTD - With modular temperature & conductivity sensors (SBE 3F & SBE 4C) & TC Duct, submersible pump, modular strain gauge pressure sensor (SBE 29), 8 Mbyte memory, protective cage, & seven 12-bit auxiliary A/D input channels (four 0 - 5 volt single-ended; two 0-5 volt differential; one current-input log amplifier for PAR sensor). Includes SEASOFT software, complete documentation, & 20 m data I/O cable (801380). Specify: housing (depth), & pressure sensor selections. SBE 25, a profiling CTD, is powered by internal batteries & records data in memory.

In addition, SBE 25 can be deployed:

  • With SBE 36 CTD Deck Unit & Power Data Interface Module (PDIM), which provide power & real-time data handling capability over single-conductor sea cables. For PDIM, specify 25-7a or -7b; order SBE 36 separately.
  • With SBE 32 Carousel Water Sampler & SBE 33 Deck Unit, which provide power, real-time data handling capability, & real-time water sampler control over single-conductor sea cables. Order SBE 32 (32, 32C, or 32SC) & SBE 33 separately.
  • With SBE 32 Carousel Water Sampler & Auto Fire Module (AFM), which provide autonomous water sampling capability. Order SBE 32 (32, 32C, or 32SC) & AFM (by selecting appropriate Carousel operating mode configuration in 32, 32C, or 32SC listing) separately.
  • With SBE 55 ECO Water Sampler & SBE 33 Deck Unit, which provide power, real-time data handling capability, & real-time water sampler control over single-conductor sea cables. Order SBE 55 & SBE 33 separately.
  • With SBE 55 ECO Water Sampler, which has built-in capabilities similar to that of an SBE 32 integrated with an AFM, providing autonomous water sampling capability. Order SBE 55 separately.
Notes:
- Optional auxiliary sensors on CTDs not shown.
- (real-time systems) Computer, slip-ring-equipped winch, conductive cable, & NMEA 0183 navigation device not supplied by Sea-Bird.
- (real-time systems) Seasave version 7.18 or later also supports acquisition of data from a NMEA device connected directly to computer (instead of deck unit).

For photos of standard shipment, click here.

For other profiling CTDs, see SBE 9plus & 19plus V2.
SBE 25 Housing (depth rating) Selections -- MUST SELECT ONE
25-1a 600 m plastic housing for CTD and SBE 5P plastic pump Housing material & depth rating does not apply to sensors -- SBE 3F temperature sensor, 4C conductivity sensor, & 29 pressure sensor are aluminum, regardless of SBE 25 housing option, & are rated for 6800 m.

SBE 5P plastic pump is rated for 600 m; SBE 5T titanium pump is rated to 10,500 m. Operational characteristics of SBE 5P & 5T are identical.
25-1c 6800 m aluminum housing for CTD and SBE 5T titanium pump
SBE 25 Pressure Sensor Range (Depth) Selections -- MUST SELECT ONE
25-2a 20 m strain gauge pressure sensor SBE 29 modular pressure sensor is integrated with SBE 25, & is field replaceable / swappable. While highest pressure rating gives you most flexibility in using SBE 25, it is at expense of accuracy & resolution. It is advantageous to use lowest range pressure sensor compatible with your intended maximum operating depth, because accuracy & resolution are proportional to pressure sensor's full scale range. For example, comparing 2000 & 7000 m sensors --
  • 2000 m sensor:
    initial accuracy = 2 m (= 0.1% * 2000 m),
    resolution = 0.3 m (= 0.015% * 2000 m)
  • 7000 m sensor:
    initial accuracy = 7 m (= 0.1% * 7000 m),
    resolution = 1.05 m (= 0.015% * 7000 m)
25-2b 100 m strain gauge pressure sensor
25-2c 350 m strain gauge pressure sensor
25-2h 600 m strain gauge pressure sensor
25-2d 1000 m strain gauge pressure sensor
25-2e 2000 m strain gauge pressure sensor
25-2f 3500 m strain gauge pressure sensor
25-2g 7000 m strain gauge pressure sensor
SBE 25 Wet-Pluggable Connector Option
25-4 Wet-pluggable (MCBH) connectors instead of Standard (XSG) connectors on C, T, P sensors, pump, related cables, & data I/O cable This option includes wet-pluggable bulkhead connectors on SBE 25 main housing & standard sensors & pump as well as associated cables.
Wet-pluggable connectors may be mated in wet conditions. Their pins do not need to be dried before mating. By design, water on connector pins is forced out as connector is mated. However, they must not be mated or un-mated while submerged. Wet-pluggable connectors have a non-conducting guide pin to assist pin alignment (exception: 6-pin connectors) & require less force to mate, making them easier to mate reliably under dark or cold conditions, compared to our standard (Impulse XSG/RMG) connectors. Like standard connectors, wet-pluggables need proper lubrication & require care during use to avoid trapping water in sockets.
Connectors on SBE 3F Temperature Sensor shown to illustrate difference between standard & wet-pluggable connectors
SBE 25 Auxiliary Sensor and Integration Options
25-5a SBE 43 Dissolved Oxygen Sensor (Profiling Configuration), 7000 m (cable & mount included) General Information:
  • 25-5 & -6 include auxiliary sensor, mount, & straight cable to connect sensor to SBE 25 bulkhead connector. See auxiliary sensor specification sheets (SBE 43, 18, 27) for sensor descriptions. Auxiliary sensor connector type (standard or wet-pluggable) must match SBE 25 connector type.
  • SBE 25 has 4 single-ended A/D channels, 2 differential input A/D channels (differential A/D channel is differentially amplified to reject noise), & 1 log-amplified PAR channel. Auxiliary sensors plug into one of three auxiliary sensor bulkhead connectors on SBE 25 main housing (1 each for single-ended A/D, differential A/D, & PAR. If connecting 2 or more sensors to 1 bulkhead connector, YMOLD (to create y-cable) applies in addition to 25-5 & -6 price.
  • Additional sensors not listed here ‑- fluorometers, transmissometers, turbidity meters, PAR sensors, etc. from third party manufacturers ‑- are compatible with SBE 25. These sensors can be purchased from Sea-Bird & integrated with SBE 25 at our factory, or you can purchase mount kits & cables from Sea-Bird & perform integration yourself. See Third Party portion of price list.
  • User can change sensors on SBE 25 in field. However, bulkhead connector(s) that support 2 or more A/D channels each require Y-cables to connect auxiliary sensors to SBE 25; each Y-cable is unique to sensors being integrated, so changing sensors may require changing Y-cable. In addition, sensor mechanical mountings may need to be changed to suit selected combination of sensors.

Sensor-Specific Information:

  • SBE 43 -- Sensor is plumbed between conductivity sensor & pump. SBE 43 is available in 7000 m titanium (25-5a or -5b) or 600 m plastic (25-5c or -5d) housing.
  • SBE 18 & SBE 27 -- Note that these sensors are only available with a depth rating to 1200 m.
25-5b SBE 43 Dissolved Oxygen Sensor (Profiling Configuration) with Wet-pluggable connector, 7000 m (cable & mount included, requires option 25-4)
25-5c SBE 43 Dissolved Oxygen Sensor (Profiling Configuration), 600 m plastic (cable & mount included)
25-5d SBE 43 Dissolved Oxygen Sensor (Profiling Configuration) with Wet-pluggable connector, 600 m plastic (cable & mount included, requires option 25-4)
25-6a SBE 18 pH sensor, 1200 m (cable & mount included)
25-6b SBE 27 pH/ORP sensor, 1200 m (cable & mount included)
25-6c SBE 18 pH sensor with Wet-pluggable connector, 1200 m (cable & mount included – Requires option 25-4)
25-6d SBE 27 pH/ORP sensor with Wet-pluggable connector, 1200 m (cable & mount included – Requires option 25-4)
YMOLD Extra charge for Y-cable to connect 2 or more sensors to 1 auxiliary sensor input bulkhead connector on CTD
25-7a Underwater power/data interface module (PDIM) integrated for use with SBE 36 CTD Deck Unit or 33 Carousel Deck Unit (includes PDIM, interface cable, & mounting hardware) SBE 36 CTD Deck Unit & PDIM provide surface power & real-time data acquisition & control for SBE 25, allowing deployment with 10,000 m long single-conductor sea cables. SBE 36 is installed on ship, while PDIM is mounted on or near SBE 25. See SBE 36 description for more information on interface.

SBE 33 Deck Unit is typically used to provide surface power & real-time data acquisition & control for SBE 25 & SBE 32 (32, 32C, or 32SC) Carousel Water Sampler or SBE 55 ECO Water Sampler. However, it can be used with PDIM instead of Carousel or ECO to provide same functionality as SBE 36 & PDIM.

PDIM housing is anodized aluminum, & is rated to 6800 m. PDIM connector type (standard or wet-pluggable) must match SBE 25 connector type.

25-7a & -7b do not include SBE 36 or 33 Deck Unit; order separately.
Can substitute SBE 33 Carousel Deck Unit for SBE 36 CTD Deck Unit.
For SBE 33, both NMEA & PAR interfaces are optional.
25-7b Underwater power/data interface module (PDIM) with Wet-pluggable connectors, integrated for use with SBE 36 CTD Deck Unit or 33 Carousel Deck Unit (includes PDIM, interface cable, & mounting hardware – Requires option 25-4)
SBE 25 Hardigg Shipping Case Option
25-8 Hardigg shipping case (AL4915-1105) instead of standard wood crate Hardigg shipping case with custom foam inserts holds SBE 25 with auxiliary sensors in standard cage (SBE 9plus shown; SBE 25 similar).
  • Rotationally molded high-impact polyethylene with reinforced corners & edges, molded-in corrugations, reinforced corners & edges, tongue-in-groove seal, positive anti-shear locks, comfort-grip handle, recessed hardware. Meets airline luggage regulations.
  • Inner dimensions:
    49 x 14.8 x 16.2 inches (124 x 38 x 41 cm).
  • Outer dimensions:
    52 x 17.8 x 18.4 inches (132 x 45 x 47 cm).
Price for 25-8 reflects a credit for deletion of our standard wood crate.

Notes regarding features of Hardigg case supplied by Sea-Bird:
1. Case does not have wheels, because we prefer that the case is not rolled along the ground:
- Rolling along the ground could cause unnecessary vibration of the CTD.
- Rolling over a curb could cause unnecessary impact to the CTD.
2. Case has small holes on each metal latch, into which you could insert a small, TSA-approved lock or some zip ties. Case cannot accommodate a large padlock.
SBE 25 Spares & Accessories
23302C SBE 25 stainless steel protective cage (DN 20310) 50308 cage comes standard with SBE 25; these are spares.
50308 SBE 25 stainless steel protective cage (23302C) with standard sensor mounts (temp/cond/press/pump) (DN 41192)
801511 9 NiMH cells in rechargeable drop-in pack (10.8V/8 Ah)
SBE 25 comes standard with alkaline batteries, but can be powered with rechargeable NiMH batteries instead. Batteries are easily accessed by unscrewing battery end cap.
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
801225 Data I/O cable, Standard connector (RMG-4FS) w/ DB-9S, 2.5 m (DN 32421) Data I/O cable connects to 4-pin end of pump-data I/O Y-cable. These test cables are used for setting up system & uploading data from memory after recovery. Applicable 20 m cable is included with SBE 25; these are spares.
801374 Data I/O cable, Wet-pluggable (MCIL-4FS) w/ DB-9S, 2.5 m (DN 32715)
801380 Data I/O cable, Standard connector (RMG-4FS) w/ DB-9S, 20 m shielded (DN 31222)
801421 Data I/O cable, Wet-pluggable connector (MCIL-4FS) w/ DB-9S, 20 m shielded (DN 32789)
20200 USB to Serial Port Adapter, FTDI UC232R-10 (connects computers with USB ports to RS-232 instruments) Many newer PCs & laptop computers have USB port(s) instead of RS-232 serial port(s). USB serial adapter plugs into USB port, & allows a serial device to be connected through adapter. Multi-port adapters are available from other companies; see Application Note 68.
50332 SEALOGGER CTD Support Kit (updated); contains spare communication cables, C,T,P sensor cables, pump/data Y-cable, connectors, dummy plugs, maintenance supplies, & other mechanical spares. Order appropriate spares kit for connector type on SBE 25:
  • 50332 for SBE 25 with standard connectors -- See document 67127 for complete listing of parts.
  • 50331 for SBE 25 with wet-pluggable connectors -- See document 67126 for complete listing of parts.
50331 SEALOGGER CTD Support Kit with Wet-pluggable connectors - contains spare communication cables, C,T,P sensor cables, pump/data Y-cable, connectors, dummy plugs, maintenance supplies, & other mechanical spares.
801641 9 Ni-Cad cells in drop-in rechargeable pack (10.8V/4.4 Ah) SBE 25 comes standard with alkaline batteries, but can be powered with rechargeable Ni-Cad batteries instead. Batteries are easily accessed by unscrewing main housing battery end cap.

Note: As of January 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.
17709 Y cable, Pump-Data I/O (DN 31551) Cable comes standard with SBE 25; this is spare. Cable connects to J1 (data I/O - pump - external power) connector on SBE 25 end cap.
Note: If SBE 25 is mounted vertically on an SBE 32C or 32SC Carousel (i.e., without cage), a cable with longer arms is required, because pump is typically mounted onto Carousel rather than onto SBE 25 housing.
90087 Universal plumbing kit (includes pump air release valve, Y-fitting, & tubing) -- Application note 64-1 Application Note 64-1 details installation of plumbing for SBE 43 & pump on a CTD.
50087 Cell filler/storage device For cleaning conductivity cell after each use & storing instrument between uses. See document 67043 & Application Note 2D: Instructions for Care and Cleaning of Conductivity Cells.
various Load-bearing Data cable These cables are for hand-hauling SBE 25 & acquiring real-time data. Cables are not intended for static working loads above 45 kg (100 lbs); working loads above 18 kg (40 lbs) may be difficult to handle without winch. Minimum recommended cable bend radius is 10 cm (4 in.) (e.g., 20 cm sheave block nominal diameter). See Application Note 59: A Load-Bearing Underwater Cable for Hand-Hauled, Real-Time Profiling for specifications; see SBE 19plus V2 Configuration Details for part numbers.
various Plumbing spares For air bleed valve & y-fitting, snap-on connector, & assorted sizes of Tygon tubing, see SBE 5M Configuration Details.
31634 Hardigg shipping case (AL4915-1105) Hardigg shipping case with custom foam inserts holds SBE 25 with auxiliary sensors in standard cage (SBE 9plus shown; SBE 25 similar).
  • Rotationally molded high-impact polyethylene with reinforced corners & edges, molded-in corrugations, reinforced corners & edges, tongue-in-groove seal, positive anti-shear locks, comfort-grip handle, recessed hardware. Meets airline luggage regulations.
  • Inner dimensions:
    49 x 14.8 x 16.2 inches (124 x 38 x 41 cm).
  • Outer dimensions:
    52 x 17.8 x 18.4 inches (132 x 45 x 47 cm).
Notes regarding features of Hardigg case supplied by Sea-Bird:
1. Case does not have wheels, because we prefer that the case is not rolled along the ground:
- Rolling along the ground could cause unnecessary vibration of the CTD.
- Rolling over a curb could cause unnecessary impact to the CTD.
2. Case has small holes on each metal latch, into which you could insert a small, TSA-approved lock or some zip ties. Case cannot accommodate a large padlock.

 

Product configuration options listing for all products

Additional cables, mount kits, and spares may be found at: Cables, Mount kits for Sea-Bird sensors, Mount kits for Third Party sensors, Spare parts

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Last modified: 01 Feb 2011

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