SBE 25 SEALOGGER CTD
Configuration Details

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.
  

For photos of standard shipment, click here.

SBE 25 Housing (depth rating) Selections -- MUST SELECT ONE

SBE 25 Pressure Sensor Range (Depth) Selections -- MUST SELECT ONE

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)

Connectors on SBE 3F Temperature Sensor shown to illustrate difference between standard & wet-pluggable connectors

• 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, and 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 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.

SBE 25 Accessories

• 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.