NexSens CB-75-SVS Wave Buoy

The CB-75-SVS Wave Buoy offers the latest in real-time wave observations in a compact, affordable, and easy to deploy platform.
  • – Measures wave height, period and direction
  • – Designed for tethered moorings
  • – Integrated SeaView Systems SVS-603HR wave sensor
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With an 53.34cm hull diameter and less than 20KG, the CB-75 is ideally suited for tethered moorings.


Self Powered:


Three integrated 4-watt solar panels are evenly spaced around the buoy to capture sunlight from any direction and charge the internal buoy battery


Data Logging:


The CB-75 data buoy is designed for integration with the X3-SUB submersible data logger with integrated power supply, wet-mate marine connectors and optional wireless telemetry.


Integrated Wave Sensor:


Wave height, period and direction are measured with the industry-leading SeaView Systems SVS-603HRi inertial wave sensor built directly into the waterproof buoy electronics.


Wireless Communications:


The X3-SVS submersible data logger is available with 4G cellular or Iridium satellite communications. The integrated antenna is nestled securely beneath the solar top.


Top to Bottom Ports:


Three 1.5-inch pass-through ports allow for sensors to be mounted underwater while securely routing the cable. Each port includes a slotted cap secured by hex bolts.


Mooring Connections:


Three eye nuts on the bottom frame provide mooring points for tethering and mooring applications. The stainless steel instrument cage provides ballast weight and also includes a mooring eye.


System Expansion:


Two additional sensor ports on the X3-SVS wave data logger allow for optional expansion with GPS receivers, meteorological stations, water quality sondes and other sensor types.


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.

Built to Last:


Constructed of cross-linked polyethylene foam with a heavy polymer skin and an indestructible stainless steel frame, the CB-75 is designed for years of service.


Wave Sensor: SeaView Systems SVS-603HRi

Parameters: Hs Wave Height (Significant Wave Height), TP (DPD) Wave Period, Dominant Wave Direction, Mean Wave Direction (MWD), Te Energy Period, RMS Tilt Angle, Max Tilt Angle
Range: Wave Height: 0.2-20m; Wave Period: 1.5-20 seconds; Wave Direction: 0-360°
Resolution: Wave Height: 0.001m; Wave Period: 0.001 seconds; Wave Direction: 0.001°
Accuracy: Wave Height: +/- 0.5cm; Wave Period: <1%; Wave Direction: +/-2°

Buoy: NexSens CB-75

Hull Outer Diameter: 21” (53.34cm)
Hull Height: 13” (33.02cm)
Tower Height: 8.2” (20.83cm)
Solar Panels: 3x 4-watts
Weight: 40 lb. (18.20kg)
Net Buoyancy: 75 lb. (34.00kg)
Tethering Attachments: 3x 3/8” eye nuts

Data Logger: NexSens X3-SVS

Operating Temperature: -40°C to 70°C
Rating: IP68
User Interface: Wireless Bluetooth or wired RS-485 via USB adapter to CONNECT Software; WQData LIVE Web Datacenter with optional wireless telemetry; Status beeps
Real Time Clock (RTC): <30sec/month drift1; Auto-sync weekly2; Internal backup battery
Data Logging: 8 MB non-volatile flash memory; >1 year storage with 20 parameters at 15-minute interval; Max 200 parameters per log interval
Log Interval: User configurable from 5-minute (20-minute default)3; Unique interval per sensor
Transmit Interval: User configurable from 5-minute (10-minute default)
Transmission Trigger: Time-based; Selective parameter upload option
Sensor Interfaces: RS-232 (2 Channels), SDI-12, RS-485, Pulse Count
Built-in Sensors: Temperature (-40° to 100°C, 0.016°C resolution, ±0.3°C accuracy); Humidity (0% to 100%, 0.03% resolution, ±4% accuracy from 5 to 95% RH; System voltage; System current; System power; Real-time clock (RTC) battery voltage
Sensor Ports: (2) MCBH-8-MP for sensor interface (RS-232, RS-485, SDI-12, Power, GND)
Power Port: (1) MCBH-6-FS for power and communication (12V Solar In, Power Switch, RS-485 Host, GND)
Telemetry Options: 4G LTE global cellular; Iridium satellite
Antenna Port: Type N female

1Assumes 25ºC operating temperature
2Requires the X3-SVS to be connected to the internet
3Minimum log interval dependent on sensor limitations and processing time


More information from NexSens Technology


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    Additional information

    Hull Dimensions

    48" (121.92 cm) outside diameter; 28" (71.12 cm) tall

    Tower Dimensions

    50" (127.00 cm) tall, 7/8 tubular

    Data Well Dimensions

    10.3" (26.16 cm) inside diameter; 27.5" (69.85 cm) tall


    300 lbs. (136.08 kg)


    1250 lbs. (566.99 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) 55-watt 12 VDC solar panels