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VENTUS-UMB Ultrasonic Wind Sensor

Extremely precise and maintenance-free measurement of wind speed and wind direction even in the lowest temperature

The accurate wind sensor uses the run-time differential method for determining the wind speed and wind direction. It provides output for instantaneous values, vector and scalar means, the maximum gust of wind and wind direction, the maximum/minimum values and the virtual temperature. Data output through serial or analogue interfaces provides compatibility of the Lufft Ventus for commercially available hydrometeorological dataloggers and PLC systems. An automatic heater ensures reliable operation even in harsh environmental conditions.

  • Wind speed, wind direction, virtual temperature, barometric pressure
  • Ultrasonic
  • Wind detection with birdproof construction, maintenance-free measurement, suitable for extreme ambient conditions, ice-free operation, vibration and seawater resistant, compatible interfaces
  • SDI-12, RS-485 with supported protocols Binary, ASCII, NMEA, Modbus & analogue output
  • 8371.UMT
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  • Measuring wind direction and speed insusceptibly to bird nesting thanks to roofed construction
  • Built-in data pre-processing, universal interfaces and selectable output protocols – compatible with OTT-dataloggers, commercially available HydroMet dataloggers and PLS systems
  • Maintenance-free operation – no moving parts that can wear out thanks to ultrasonic measuring method; no need for re-calibration
  • Suitable for all climate zones; also for solar-powered automatic meteorological stations
  • Integrated heater that can be switched on if there is danger of frost – guarantees ice-free operation in extremely low temperatures until -40 °C
  • Vibration and seawater resistant – also applicable in coastal regions
  • Successfully tested and certified in extreme ambient conditions (temperature, air humidity, electromagnetic compatibility, vibration, salt spray, and icing)
  • Embedded algorithms that provides the wind speed and direction as actual and averaged values
  • Wind gust calculation regarding WMO (Guide to Meteorological Instruments and Methods of Observation)

The robust and maintenance-free wind sensor is designed for professional meteorological applications in all climate zones. It delivers reliable data, even in extreme ambient conditions.

Examples of Use:

  • Synoptical automatic weather stations of meteorological services
  • Weather stations at airports, marinas and onboard ships
  • Wind turbine control
  • Weather observation for road and traffic control systems
  • Mountain weather stations for avalanche and flood warning
  • Hydro-meteorological stations
EU declaration of conformity - Lufft VENTUS
EU declaration of conformity - Lufft VENTUS
Firmware - Lufft - Ventus-UMB
Version 37
Lufft - Ventus UL - Certificate (DE/EN)
Manual - Lufft - Ventus V200A (EN)
Manual - Lufft UMB Config Tool (EN)
RoHS - Declaration of Conformity / Konformitätserklärung - VENTUS
Software - Lufft - ConfigTool .NET
Version 1.6
Software - UMB Config Tool
Validation Study - Ultrasonic Wind Sensor VENTUS (EN)
Video - VENTUS - Produktfilm/Product film Lufft Ventus - UMB Wind Sensor
Video - Ventus: Cost Benefit Analysis for Replacement of Mechanical Turbine Control Wind Sensors
Video - Ventus: Easy Change of Wind Sensors on Wind Turbines - Windpower - WindBridge
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Dimensions Ø approx. 150 mm, height approx. 170 mm
Weight Approx. 1.62 kg
Permissible ambient temperature -40...60 °C
with heating 24 VDC / 240 VA (140 VA + 100 VA)
Bus operation Up to 32 devices
Operating voltage electronics 12 - 24 VDC / 1.9 VA, without heating
Electrical connection 8 pole plug
Housing material Aluminium, seawater - proof
Protection type IP68
Pole diameter 50 mm/2"
Factory certificate Yes
Data output digital
Interface RS485 semi-/full duplex, isolated
Baud rate 1200 - 57600
Measurement rate instantaneous value 250 ms; 1 - 10 s
Measurement rate Avg (arithmetic, vector), Min, Max 1...10 min
Status Heating, sensor failure
Data output analog
Data output analog Only semi - duplex mode
Output signal 0...20 mA, 4...20 mA, 0...10 V, 2...10 V,
2...2,000 frequency (instantaneous, avg, min, max)
Load Max. 500 Ohm
Resolution 16 bit
Jarring test According to IEC 60945
Corrosion test According to MIL-STD-810 Method 509.3
Ice-free test According to MIL-STD-810F Method 521.2
HALT Highly Accelerated Life Test
Maximum operating height 3500 m
Wind direction
Principle Ultrasonic
Measuring range 0...359.9 °
Unit °
Accuracy ±2° RMSE >1.0 m/s
Resolution 0.1 °
Wind speed
Principle Ultrasonic
Measuring range 0...90 m/s
Unit m/s
Accuracy ±0.2 m/s or ±2 % RMS of reading (whichever is greater) for 0...65 m/s - otherwise ±5 %
Resolution 0.1 m/s
Virtual temperature
Principle Ultrasonic
Measuring range -50...70 °C
Unit °C
Accuracy ±2.0 °C (without heater and without sun exposure or wind > 4 m/s)
Resolution 0.1 °C
Air pressure
Principle MEMS capacitive
Measuring range 300...1200 hPa
Unit hPa
Accuracy ±1.5 hPa
Resolution 0.1 hPa
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