Ventus

Ultrasonic Wind Sensor

Description

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.

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

Advantages

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)

Examples of Use

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

  • 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

Resources

Manual VENTUS-UMB Ultrasonic Wind Sensor
Leaflet – Ultrasonic Wind Meter Lufft Ventus

Technical Data

Data
Measured wind speed, wind direction, virtual air temperature, barometric pressure
Calculated instantaneous values in intervals from 1 to 10 seconds, vector and scalar means in intervals from 1 to 10 minutes
max/min values of the wind direction sectors
maximum gust of wind and wind direction, virtual temperature
Wind speed
Measuring method 4 x 10 Hz ultrasonic sensors
Measuring range 0 … 75 m/s
Resolution 0.1 m/s
Accuracy ±0.2 m/s or ±2 % RMS
Threshold 0.1 m/s
Wind direction
Measuring method 4 x 10 Hz ultrasonic sensors
Measuring range 0 … 359,9°
Resolution 0.1°
Accuracy < 2° (> 1m/s) RMSE
Threshold 0.1 m/s
Virtual air temperature
Measuring method ultrasonic technology
Measuring range -50 … +70 °C
Resolution 0.1 °C
Accuracy ±2 K (no heating, no solar irradiation, or wind speed above 4 m/s)
Barometric pressure
Measuring method MEMS-Sensor, capacitive
Measuring range 300 … 1200 hPa
Resolution 0.1 hPa
Accuracy ±1.5 hPa
Electrical data
Interfaces selectable using the Lufft-Config tool (PC-SW for Windows OS)
SDI-12 release 1.3 (factory setting)
RS-485 galvanically isolation, halb-duplex, baud rates 1200 … 19200
RS-485 protocols binary, ASCII, TLS2002FG3, MODBUS, NMEA-WIMWV
Analog output 4 … 20 mA or 2 … 10 VDC, 16 bits
Power supply
Input voltage 10,5 … 28 VDC
Power consumption (sensor) 50 mA @ 12 VDC
Heater 24 VDC/240 Watt
Ambient
Operating temperature range -40 °C … +60 °C (with heater), -20 °C … +60 °C (without heater)
Storage temperature -55 °C … +80 °C
Relative humidity 0 … 100 % R.H.
Mechanical data
Dimensions (H x Ø) 170 mm x 150 mm
Weight
Material seawater resistant AlMg3Si aluminium alloy
Color
Fastener (Ø)
Protection and standards
Type of protection
Standard
EMC directive 2004/108/EG
Emitted interference EN 55011:2009, EN 61000-6-3
Immunity EN 61000-6-6 and EN 61000-4-2/3/4/5/6/8
Vibration IEC 60068-2-6/IEC 60945
Salt spray MIL-Std 810, 509.3
Ice MIL-Std 810F, 521.2

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