VENTUS-X-UMB Ultrasonic Wind Sensor

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.

 

Advantages

Advantages of the ultrasonic anemometer VENTUS-X

  • Most powerful integrated heater with additional transducer heater, that can be switched on if there is danger of frost – guarantees ice-free operation in extremely low temperatures and freezing conditions
  • 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
  • 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)
Examples

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
Technical Data
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 ±1.5 hPa
Resolution 0.1 hPa