SBE 16plus V2 SeaCAT C-T (Pressure optional) Recorder
Configuration Details

See:

• SBE 16plus-IM V2 for version with Inductive Modem interface in place of RS-232 interface.
• SBE 19plus V2 for similar CTD intended for profiling applications as well as moored applications.
• SBE 37-SM or 37-SMP MicroCAT for CTD (conductivity, temperature, and optional pressure) without auxiliary sensor input capability.
• SBE 37-SMP-IDO  or 37-SMP-ODO MicroCAT for CTD (conductivity, temperature, and optional pressure) and Dissolved Oxygen (no other auxiliary sensor input capability).

Pressure sensor is installed in connector end cap, & is not field replaceable / swappable. While highest pressure rating gives you most flexibility in using 16plus V2, 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 = 0.04 m (= 0.002% * 2000 m)
• 7000 m sensor:
  initial accuracy = 7 m (= 0.1% * 7000 m),
  resolution = 0.14 m (= 0.002% * 7000 m)

Digiquartz pressure sensors provide better accuracy (0.02% of full scale range vs 0.1% of full scale range) & resolution (Digiquartz resolution dependent on user-programmable integration time) than strain gauge pressure sensors. See SBE 16plus V2 Strain Gauge Pressure Sensor Options above for photo of pressure sensor port; when used with Digiquartz, nylon pressure capillary fitting screws into port.

Pressure sensor is installed in connector end cap, & is not field replaceable / swappable. While highest pressure rating gives you most flexibility in using 16plus V2, 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 psia (1400 m) & 6000 psia (4200 m) sensors --

• 2000 psia (1400 m) sensor:
  initial accuracy = 0.28 m (= 0.02% * 1400 m)
• 6000 psia (4200 m) sensor:
  initial accuracy = 0.84 m (= 0.02% * 4200 m)

SBE 5M pump is intended for providing pumped conductivity only. Pump provides better conductivity response & anti-foulant protection than non-pumped configuration. SBE 5M pump is rated to 600 m with plastic housing or 10,500 m with titanium housing.

Larger, more powerful SBE 5P or 5T is required if also planning to pump auxiliary sensors (such as dissolved oxygen, etc.). SBE 5P plastic pump is rated to 600 m; SBE 5T titanium pump is rated to 10,500 m. Operational characteristics of SBE 5P & 5T are identical.

Data I/O - Pump bulkhead connector on 16plus V2 is standard, so pump can be added in field without requiring any modifications to 16plus V2. These all include pump, pump mount, & data I/O - pump Y-cable. 16p-4c, -4d, -4g, & -4h include Y-cable compatible with wet-pluggable bulkhead connectors on 16plus V2 & on pump. See DN 31551 for standard connectors, DN 32896 for wet-pluggable connectors.

• Intake end of conductivity cell
• Exhaust end of conductivity cell, when 16plus V2 is not pumped

• Exhaust end of conductivity cell when 16plus V2 is pumped, for connection of Tygon tubing
• Intake end of conductivity cell during cleaning and storage only, to allow you to connect Tygon tubing for flushing plumbing

Notes:

• Sea-Bird does not supply Electrochem lithium batteries; you must purchase them elsewhere (see WGT's website for purchasing information). Shipping restrictions apply for Electrochem lithium batteries & assembled battery packs.
• Lithium battery packs cannot be used with a 16plus V2 that is integrated with SBE 5T or 5P pump, because of current limitations. They can be used with a 16plus V2 with no pump, or with an SBE 5M pump.

• 50434 for 16plus V2 with standard connectors -- See document 67196 for complete listing of parts.
• 50435 for 16plus V2 with wet-pluggable connectors -- See document 67197 for complete listing of parts.

• 4-pin end of pump-data I/O Y-cable (for 16plus V2 used with a pump), or
• 4-pin end of data I/O extension cable (for 16plus V2 used without a pump)