NexSens CB-650 Data Buoy

When extra buoyancy is not required, the CB-650 offers a compact platform with convenient tower mounting for met sensors, navigation lights, and radar reflectors

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The platform integrates three 30-watt solar panels on the tower with space for up to three 28 A-Hr batteries in the data well.




The stainless steel tower includes a top mounting plate for solar marine light and radar reflector. Mounts are also available for weather sensors, video cameras and other topside instruments.


Data Well:


A 10-inch diameter by 22-inch tall data well provides a watertight housing for batteries, data loggers, sensors, and other hardware.




The data well lid provides pass-through connections for sensors, power, venting, and more. When integrated with the optional NexSens data logger and connectorized lid, the system is truly plug-and-play.


Top-to-Bottom Ports:


Three 4-inch pass-through ports allow for sensors to be mounted underwater while securely routing the cable. Instrument deployment pipes and custom sensor mounts attach to 4-inch NPT bottom threads.


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:


The data well lid is pre-configured to accommodate the NexSens data logger. Alternatively, third party data loggers can be housed inside the data well.


Wireless Communication:


Waterproof telemetry modules securely mount to the buoy top plate. Communication options include radio-to-shore, cellular and Iridium satellite.


Built to Last:


Constructed of cross-linked polyethylene foam with a heavy polymer skin and an indestructible stainless steel frame, the CB-650 is designed for years of service.


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    Additional information

    Hull Dimensions

    38" (96.52 cm) outside diameter; 22" (55.88 cm) tall

    Tower Dimensions

    40" (101.60 cm) tall, 7/8 tubular

    Data Well Dimensions

    10.3" (26.16 cm) inside diameter; 21.5" (54.61 cm) tall


    275 lbs. (97.52 kg)


    650 lbs. (294.84 kg)

    Hull Material

    Cross-linked polyethylene foam with polyurea coating and stainless steel deck

    Hardware Material

    316 stainless steel

    Mooring Attachments

    1 or 2 point, 3/4" eyenut

    Solar Panel

    (3) 30-watt 12 VDC solar panels