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HD51.3D… – Ultrasonic Anemometer (technopolymer)

Make:  Delta ohm      Model:  HD51.3HD51.3D..(technopolymer)
✅ 2-axis ultrasonic static anemometer. Measurement of wind speed and direction, U-V Cartesian components of wind speed, Wind Gust and baro-metric pressure.
✅ Measurand : Wind speed and direction, U-V Cartesian components of wind speed, Wind Gust and baro-metric pressure.
✅ Sensor Type : Ultrasonic.
✅ Signal Output: RS232, RS485, and RS422 serial outputs, Analog (4÷20 mA , 0…1 V, 0…5 V or 0…10 V)
✅ Supplied With: Cable, Factory test/ Calibration Certificates

HD51.3D… is a series of high performance two-axis static ultrasonic anemometers for accurate measurements in all environmental conditions.

Available in different combinations for the measurement of: Wind speed (up to 85 m/s), Wind direction, Cartesian U-V components of wind speed, Wind Gust, relative humidity and temperature (optional), global solar radiation (optional), atmospheric pressure (optional).

This model is equipped with an upgraded heater, for quick defrosting, and an anodised aluminium alloy case with anti-corrosion coating that makes it possible to use the instrument even in particularly aggressive environments. The anemometer meets the requirements of MIL-STD-810G Method 509.6 (salt spray corrosion test). High immunity to electromagnetic interference makes it suitable for measurements in electrically noisy environments.

All models have RS232, RS485 and RS422 serial outputs. NMEA, MODBUS-RTU and proprietary ASCII communication protocols. Two analogue outputs for wind speed and wind direction, factory configurable as 4÷20 mA (standard), 0…1 V, 0…5 V or 0…10 V.

Operating temperature -40…+70 °C. Instrument power supply 12…30 Vdc. Heater power supply 24 Vdc. Software HD52.3D-S, for instrument configuration and monitor, downloadable here.


  • Wind farms monitoring
  • Remote weather stations
  • Buildings, constructions and bridges control
  • Ports, airports and heliports
  • Road and railway tunnels

Delta ohm



General Specification



640 g approx. (versions without T/RH) 1 kg approx. (versions with T/RH)


Serial outputs: Isolated RS232, RS485 and RS422
Analog outputs: 2 analog outputs, for wind speed and direction or for velocity U-V cartesian components.
Output 4…20 mA standard (max. load 500 W), on request 0…1 V,
0…5 V or 0…10 V
Analog outputs updating rate 10 Hz
The outputs are isolated from the power supply

Power Supply

12…30 Vdc

Operating Temperature

-40…+60 °C.

Power Consumption

60 mA @ 24 Vdc

Protection Level

IP 66

Wind speed

Measuring range:- 0…85 m/s (versions without T/RH), 0…75 m/s (versions with T/RH)
Resolution:- 0.01 m/s
Accuracy:-± 0.2 m/s or ± 2% of measure, the greatest (0…65 m/s), ± 3% of measure (> 65 m/s)

Wind direction

Sensor:- Ultrasounds
Measuring range:- 0…359.9°. In order to avoid oscillations of the analog output around 0°, the extended range 0…539.9° can be set.
Resolution:- 0.1°
Accuracy:-± 2° RMSE (wind speed > 2 m/s)


(Compass + Tilt angles)
Resolution:- 0.05°
Accuracy:- ± 1°


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