uSonic-3 Omni

3-Axis anemometer for measuring wind speed and direction
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uSonic-3 Omni 3-axis ultrasonic anemometer

Compact and affordable sensor for wind speeds up to 60m/s

The uSonic-3 Omni ultrasonic anemometer provides a cost effective and accurate solution for the measurement of air flow in three dimensions. With no moving parts and rugged stainless steel construction the uSonic-3 Omni is suitable for use in a wide range of applications that require three dimensional wind measurement. The optional online turbulence calculations extend the range of applications to include research projects such as eddy correlation flux studies. The compact rugged design makes the sensor easy to install and ensures that maintenance is virtually eliminated.

Where icing is a problem, the optional heating will ensure continuity of data. New heating technology provides better control and power consumption as it heats only the appropriate elements and only when it is needed, ensuring 100 per cent data availability regardless of weather.

Comprehensive online data quality checks and automatic health status reports ensure the user has full confidence in the data and that should any fault develop it is immediately reported.

Serial data communication is provided as standard with both RS422 and RS485 capabilities. When analogue outputs are required the analogue output option provides four output channels of either current or voltage.


  • 3D wind speed and direction measurement
  • wind speed range: 0.01 – 60 m/s (0 – 134 mph)
  • wind direction range: 0 – 359°
  • up to 25 Hz sampling rate
  • virtual temperature output
  • high resolution and accuracy
  • no moving parts
  • maintenance free
  • digital outputs RS422 and RS485
  • low power requirement and wide supply range (9-36 VDC)
  • all stainless steel construction
  • optional heated measuring head for error-free operation down to -40°C
  • optional four channel analogue outputs
  • optional online turbulence calculations
  • optional field calibration kit

Technical Description

The uSonic-3 Omni ultrasonic anemometer provides the following information in various data outputs which can be polled or output automatically:

  • instantaneous and averaged data for the three wind vectors x, y & z
  • horizontal wind speed plus vertical component
  • sonic temperature

Data can be averaged by:

  • scalar or vector
  • clock synchronised or running average
  • separate output rates and sampling times

Some other important features:

  • perfect linearity from 0 to 60 m/s
  • user definable north orientation (range 0-359º alignment off axis)
  • data quality control to perform confidence checks on raw data
  • date / time stamps with several options
  • check sum information
  • calibration validity output monitoring

Optional features:

  • online calculation of turbulence parameters
  • four current or voltage analogue outputs

Common Specifications

Wind Speed

0.01 - 60 m/s (0 - 134 mph)
+/- 2 % (full scale output)
0.01 m/s (steps)

Wind Direction

0 - 359°
+/- 2°
0.1° (steps)

Digital Output

RS422 OR RS485
Sampling rate
25Hz (selectable)


9-36 VDC operation
Current draw
180 mA (@ 24 VDC), ~5W

Other Data

Sonic temperature
-40°C to 70°C in non-condensing environments
Units of measure
m/s, knots, mph, km/h, °C


IP rating
30 cm x 54 cm (11 x 21 inches)
3.4 kg (7.4 Ibs) depending on model


Sensor head
stainless steel (V4A)
Electronic housing
Powder-coated die-cast aluminium

Optional items & Accessories

Analogue outputs
Four channels, either 0-5 0-±5Vdc or 0-20 4-20mA 12 Bit, scalable.
Sensor head heating
Heating of the sensor head 55W. Both manual and automatic control
Mains power supply
Weather proof mains power supply available for either 110Vac or 240Vac. Supplies both sensor and heating power
Calibration kit
A calibration kit is available to check the performance of the sensor

Sales & Support

Contact Biral for more information

To find out more about this instrument or to discuss your application requirements please do not hesitate to contact Biral.

After Sales Support

Biral offers free advice and technical support for the lifetime of the instruments we sell. Once you have purchased the unit you can always contact us for help using the links on our Service Support page.

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