Installing User-Supplied Electronics in CB-Series Data Buoys

NexSens CB-Series data buoys are flexible platforms that allow for use with both NexSens and user-supplied electronics. For those wishing to integrate their electronics, including batteries, data loggers, and modems, several accessories are available to facilitate installation inside the watertight data well located in the center of the buoy.

Common Accessories

Battery mountsĀ – While user-supplied electronics systems may receive power from NexSens-issued CB-A01-2 and CB-A05-x battery harnesses, users may also supply and install their battery and solar regulator systems in the data well. The bottom of the data well has two welded standoffs for connection of battery mount posts, and hardware for securing user-supplied batteries, including mounting posts, brackets, and foam inserts. Consult a NexSens Applications Engineer for available parts.

Data well plates – Buoys may be delivered with various data well top plate options:

  • CB-PTL pass-through lid with gland fittings for running user-supplied flying lead cables into the data well, also compatible with bulkhead cable assemblies
  • Blank plate with only screw holes for users to drill custom hole patterns
  • No plate, user may machine custom plate using screw hole pattern from NexSens

In most cases, the CB-PTL is delivered with the buoy as it offers both flexibility and ease of use.

CB-PTL pass through lid.


Bulkhead cable assemblies – Ports on a CB-PTL may be interchanged with bulkhead cable assemblies for power, RF signals and sensor data cables. The following options are available:

  • UW6-BULK – 6-pin power cables for connection of batteries, solar panels and regulator
  • RF-BULK – N-style female to SMA male RF cable assembly for use with modems placed inside data well
  • UW-BULK – 8-pin sensor receptacle for use with sensor cables with factory-installed UW plug connector; allows for external waterproof connection of user-supplied sensors

Instructions for installation and use of these bulkhead connector cables is available here.

UW6-BULK power cable assembly.

RF Bulkhead Connector Assembly

RF-BULK antenna cable assembly.

UW-BULK sensor cable assembly.


Securing Data Well Plate

Any time the data well plate will be resealed, first verify that the large O-ring is in good condition, clear of debris, and lightly greased. Align the plate with the bolt holes on the buoy and place the provided bolts with lock washer. Tighten incrementally using a 9/16″ socket wrench in a cross-pattern as shown below (2-3 passes recommended) to ensure even load distribution and proper seal of the data well.

Tighten bolts in a cross-pattern to seal properly.