G. Lufft Mess- und Regeltechnik GmbH

- Model Ventus-UMB - Ultrasonic Wind Sensor

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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 the lowest temperature.

  • Parameters measured: Wind speed, wind direction, virtual temperature, barometric pressure
  • Measurement technology: Ultrasonic
  • Product highlights: Maintenance-free measurement, suitable for extreme ambient conditions, ice-free operation, vibration and seawater resistant, compatible interfaces
  • Interfaces: SDI-12, RS-485, various RS-485-protocols, analogue output

  • 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)

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

  • General :
    • 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 / 1.2 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 : 1 - 10 s
    • Measurement 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 : ±1.5hPa
    • Resolution : 0.1 hPa

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