CB-50 Data Buoy

CB-50 Data Buoy

The CB-50 data buoy is an ultra-portable real-time system for short-term or seasonal monitoring of dredging projects, industrial spills, natural disasters, and other emergency response situations.




With an overall 18-inch diameter by 37.5-inch height, the CB-50 can be deployed quickly and easily from a small boat. Fully configured systems typically weigh around 50 lbs.



A removable topside foam tower protects the electronics, supports solar marine lights, and offers a convenient lifting point via (3) 5/8” eyenuts.

Buoy deployment pipe

Center Hole

The 5.5” ID center hole is designed to securely house X2-SDL data loggers. Empty canisters are also available for user-supplied electronics.

Sensor Connections

Sensor Connections

The X2-SDL is configured with three sensor ports for connection to industry standard communication protocols including SDI-12, RS-485 and RS-232.

Water quality sonde deployment

Instrument Cage

An optional instrument cage provides a secure mounting location for water quality sensors, multi-parameter sondes, depth sonar and more.

Data buoy navigation beacon

Solar Beacon

The optional solar marine light has a one to three nautical mile range and securely mounts to the buoy top plate for maximum visibility.

Data Logging

Data Logging

The CB-50 data buoy is designed to accommodate the X2-SDL submersible data logging system, which includes integrated power supply and optional wireless telemetry.

Cellular data buoy

Wireless Communications

The X2-SDL data logger is available with radio-to-shore, cellular and Iridium satellite communications. An integrated antenna mounts securely beneath the tower.

Small durable data buoy

Built to Last

Constructed of cross-linked polyethylene foam with a heavy polymer skin and an indestructible stainless steel frame, the CB-50 is designed for years of service.

Tech Specs

  • Hull Outer Diameter: 20.0” (50.8cm)
  • Hull Height: 12.0” (30.48cm)
  • Center Hole Inner Diameter: 5.5” (13.97cm)
  • Tower Height: 10.0" (25.4cm)
  • Weight: 35 lb (16kg)
  • Net Buoyancy: 50 lb (23kg)
  • Hull Material: Cross-linked polyethylene foam with polyurea coating & stainless steel deck
  • Hardware Material: 316 stainless steel
  • Mooring Attachments: 1x 3/4” eyenut


Why is the CB-50 buoy best suited for short-term applications?

The CB-50 is light enough to ship in a box rather than on a pallet, which significantly reduces freight costs. It also deploys easily, as no large boat or crew is necessary. Once deployed, relocating the system is as easy as lifting the anchor, moving to the appropriate location, and dropping the anchor.

Instead of using solar charging, the CB-50 buoy supports the X2-SDL Submersible Data Logger that is powered by sixteen user-replaceable D-cell alkaline batteries. When outfitted with wireless telemetry, the data logger transmits battery voltage as a diagnostic parameter to take the guesswork out of battery replacement frequcency (typically necessary every several months). The integrated X2-SDL submersible data logger is compatible with most water sensors on the market, making it a very flexible platform for short-term, portable, and even seasonal projects.

What important considerations are necessary for ballast weight?
An instrument cage is an optional addition to the CB-50 buoy. No extra weight is needed if the system includes any instrument cage model (CAGE, CAGE-EXO, etc.). If the system does not include an instrument cage, at least 20-25 pounds of extra weight should be added to the buoy frame. NexSens offers an optional 25 lb. ballast weight (PN# BAL25) that can be integrated between the buoy frame and mooring eye.
Can I integrate my own electronics on this platform?
While the CB-50 is designed for use with the X2-SDL Submersible Data Logger, the buoy has a 5.5" diameter hole in the center of the hull for user-integrated waterproof hardware. Upon request, NexSens can offer a size-compatible empty waterproof canister for integrating third-party electronics. For more information on custom electronics integration options, contact us at info@nexsens.com.

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