NexSens CB-25 Data Buoy
Features
- 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
- Free ground shipping
- Expedited repair and warranty service
- Lifetime technical support
- More
Image | Part# | Product Description | Price | Stock | Order | |
---|---|---|---|---|---|---|
![]() | CB-25 | CB-25 data buoy for use with X2-SDLMC data loggers, 50 lb. buoyancy | $1,995.00 | Check Availability |

Image | Part# | Product Description | Price | Stock | Order | |
---|---|---|---|---|---|---|
![]() | X2-SDLMC | X2-SDLMC submersible data logger | Request Quote | Check Availability | ||
![]() | X2-SDLMC-C-2G3G | X2-SDLMC submersible data logger with 2G/3G cellular telemetry | Request Quote | Check Availability | ||
![]() | X2-SDLMC-C-NA4G | X2-SDLMC submersible data logger with North American 4G LTE cellular telemetry | Request Quote | Check Availability | ||
![]() | X2-SDLMC-C-CATM | X2-SDLMC submersible data logger with CAT-M1/NB2 LTE cellular telemetry | Request Quote | Check Availability | ||
![]() | X2-SDLMC-I | X2-SDLMC submersible data logger with Iridium satellite telemetry | Request Quote | Check Availability | ||
![]() | MCIL6MP-USB-DC | Direct connect USB PC cable with external 12VDC power leads, X2-SDLMC & X2-SVS | $295.00 | Check Availability | ||
![]() | M550-F-Y | Solar marine light with flange mount & 1-3 nautical mile range, 15 flashes per minute, yellow | $595.00 | 9 Available | ||
![]() | GPS24XD-MC | GPS 24xd HVS marine GNSS receiver with MCIL-8-FS connector, 3m cable | $695.00 | Check Availability | ||
![]() | CB-24XD-M | Garmin GPS 24xd receiver mount for CB-Series data buoys | $95.00 | Check Availability | ||
![]() | 200WX-IPX7-MC | 200WX-IPX7 Ultrasonic WeatherStation with RS-232 output & MCIL-8-FS connector, 3m cable | $2,295.00 | Check Availability | ||
![]() | CB-WX-M | Airmar WX-Series weather sensor mount for CB-Series data buoys | $195.00 | Check Availability | ||
![]() | CAGE-S | Stainless steel instrument cage, 28" | $795.00 | Check Availability | ||
![]() | MC-EXO2-S | EXO2s/EXO3s sonde mooring clamp set | $395.00 | Check Availability |








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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