NexSens CB-25 Data Buoy

The CB-25 Data Buoy is a compact, affordable, and easy to deploy platform for both water and atmospheric observations.


  • Integrated 4-watt solar panels for 12-watts of solar charging
  • Optimized for X2-SDLMC data logger with available 4G cellular or Iridium satellite telemetry
  • Topside plate supports solar marine light, weather stations, and other sensors
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NexSens CB-25 Data Buoy

The CB-25 Data Buoy is a compact, affordable, and easy to deploy platform for both water and atmospheric observations. At 18” hull diameter and 22 lb. (9.98kg) weight, it can be used for drifting, tethering or mooring applications. The buoy integrates the X2-SDLMC Submersible Data Logger, which includes external sensor ports to support weather stations, thermistor strings, multi-parameter sondes, Doppler current profilers, GPS, and other monitoring instruments.

Constructed of an inner core of cross-linked polyethylene foam with a tough polyurea skin, the CB-25 is designed for years of service. A rechargeable battery with integrated solar panels power the system continuously, and all electronics are housed in a quick-removable X2-SDLMC data logger package with wet-mate connectors. Three 1.5” pass-through holes facilitate cable routing of underwater sensors.

Available with integrated 4G cellular or Iridium satellite communications, the CB-25 buoy sends data in real-time to the cloud-based WQData LIVE datacenter. In a basic configuration, this free service allows users to securely access and analyze data, as well as share data through an API or auto-report. Subscription-based tiers of WQData LIVE are also available for advanced reporting, alarming, and data management.

  • Hull Outer Diameter: 18” (45.72cm)
  • Hull Height: 11” (27.94cm)
  • Center Hole Inner Diameter: 5.5” (13.97cm)
  • Center Hole Height: 11" (27.94cm)
  • Pass-Through Hole Diameter: 1.5" (3.81cm)
  • Tower Height: 8.2” (20.83cm)
  • Solar Panels: 3x 4-watts
  • Weight: 22 lb (9.98kg)
  • Net Buoyancy: 50 lb (22.68kg)
  • Hull Material: Cross-linked polyethylene foam with polyurea coating & stainless steel deck
  • Hardware Material: 316 stainless steel, 304 stainless steel (lifting handles); Galvanized steel (ballast chain)
  • Tethering Attachments: 4x 3/8” eye nuts
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NexSens CB-25 Data Buoy
CB-25 data buoy for use with X2-SDLMC data loggers, 50 lb. buoyancy
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