Datawell DWR4 Waverider Buoy

DWR4 Wave Measurements: same sensor, new data processing

Key Features

The industry gold-standard directional wave measurement buoy. Now featuring the option for acoustic current meters for the measurement of surface currents.

  • The DWR4 can now be fitted with acoustic current meters for measuring surface currents (DWR ACM)
  • The wave sensor of the DWR4 is identical to those in the well-known MkI, II and III
  • Processing of the measured data is now operated at a doubled sampling frequency of 2.56 Hz
  • The limit of the heave and direction signals was increased from 0.58 to 1.0 Hz, this means the high frequency limit is now determined by the hydrodynamic response of the hull
  • The DWR4 transmission protocol allows for a superior heave and horizontal displacement resolution
  • Data output from the DWR4 is easily compared to those of the DWR-MkIII via the use of the waves4 software and WaveView Connect Software integration

Operational Improvements

Additional features of the DWR4 compared to the DWR-MkIII:

  • The buoy is tagged with an electronic ID-number which is transmitted alongside the data
  • The temperature of the Hippy-40 sensor and that of the hatch cover electronics are measured as a health parameter
  • The energy used from both the batteries and optional solar panel is measured to improve energy management
  • A power switch is included as standard on the hatch cover
  • The flashlight now operates on a sunset/sunlight algorithm based on the time and the buoys GPS position

DWR4 Downloads

Additional Features for the DWR4 Buoy

Iridium Communication

The DWR4 buoy offers more messages and a greater flexibility regarding communication using the Iridium Satellite Network, meaning you can communicate with your buoy anywhere in the world.

The messages are of a reduced size, which in turn reduces transmission costs. We offer Iridium services, meaning we can produce a turn-key solution with your buoy.

Compact Air Temperature (CAT4)

This newly developed option integrates the HF antenna, flashlight and an air temperature sensor.

The CAT4 antenna measures the air temperature approximately two meters above the sea surface, complimenting the wave measurements. This new meteorological parameter applies a concept  which corrects the measured temperature for solar radiation and detects adverse effects, such as evaporation.
Click here to learn more about the CAT4

Port Log

Port Log is an online portal which can be used for data display and download, provided by OceanWise. It can be delivered as as either a ‘cloud based’ or installed system. Totally instrument and transmission independent, it is robust and flexible and recognises data inputs from a wide range of different sensors.

RS Aqua can provide Port Log alongside a DWR buoy, providing you with everything you need.

Datawell Buoy Calibration Information

RS Aqua is home to the only Datawell-installed Wave Rider buoy Calibration and Service Centre, outside of the Netherlands (the home of Datawell)

  • All calibrations and services are offered with the same certification and warranty than those by Datawell
  • We carry the full range of Datawell spares and consumables
  • We can test and repair measurement and telemetry systems and undertake hardware and firmware upgrades
  • This calibration unit gives customers the reassurance and convenience they need with minimal downtime


“The Channel Coastal Observatory have used Datawell Direction Waverider MkIII wave bouys for monitoring coastal nearshore wave climates for over 17 years. Over this time period, they have proven to be a very reliable and robust instrument. As such, they are an integral part of our coastal monitoring programme, allowing us to provide realtime wave data to a huge range of coastal managers and users from our website"

Channel Coastal Observatory, Southeast Regional Coastal Monitoring Programme, England

About the Company

Datawell is a private company based in the Netherlands, which develops and produces oceanographic measuring instruments.

Their state-of-the-art Waverider buoy is offered in a sensor-based or GPS-based version, which can measure wave height, wave direction and sea surface temperature. Some buoys can also measure air temperature, surface current speed and direction and sensors for other climatological parameters, such as wind speed and direction are being developed.

Datawell products are particularly robust and proven to excellently withstand the harsh marine environment. The use of low power sensors and electronics enables long time continuous operation and the design stands for reliable products with long life expectation.