Ventus - A State-of-the-Art Wind Sensor from OTT HydroMet

The precise wind sensor calculates wind speed and direction using the run-time differential approach. 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. 

The Lufft Ventus can output data through serial or analog interfaces, making it compatible with PLC systems and widely available hydrometeorological dataloggers. Even in the coldest temperatures, an automatic heater guarantees steady operation.

Ventus - State-of-the-art Wind Sensor from OTT HydroMet

Image Credit: OTT HydroMet GmbH – Meteorology

Ventus - State-of-the-art Wind Sensor from OTT HydroMet

Image Credit: OTT HydroMet GmbH – Meteorology

  • Parameters calculated: Wind speed, virtual temperature, wind direction, barometric pressure
  • Measurement technology: Ultrasonic
  • Product highlights: Measurement that requires no maintenance and is appropriate for harsh environmental conditions, operates without ice or vibration and has compatible interfaces
  • Interface: SDI-12, RS-485, numerous RS 485 protocols, analog output


  • Seawater and vibration resistance that is useful in coastal areas
  • An inbuilt heater that can be activated in the event of a frost threat ensures ice-free operation down to -40 °C
  • Maintenance-free operation — There are no moving parts that can wear out, and recalibration is not necessary, thanks to the ultrasonic measurement technique
  • Accomplished testing and certification under challenging circumstances (air humidity, temperature, electromagnetic compatibility, salt spray, vibration, and icing)
  • Appropriate for all climate zones and for solar-powered automatic meteorological stations
  • OTT-dataloggers, widely available HydroMet dataloggers and PLS systems are compatible with built-in data pre-processing, global interfaces, and configurable output protocols

Examples of Use

The sturdy, maintenance-free wind sensor is intended for use in all climate zones in commercial meteorological applications. Even in harsh environmental circumstances, it produces reliable data.


  • Synoptical involuntary weather stations of meteorological services
  • Hydro-meteorological stations
  • Mountain weather stations for avalanches and flood warning
  • Weather stations at airports, onboard ships, and marinas
  • Wind turbine control
  • Weather surveillance for road and traffic control systems

Technical Data

Source: OTT HydroMet GmbH - Meteorology

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/second
Resolution 0.1 m/second
Accuracy ±0.2 m/second or ±2% RMS
Threshold 0.1 m/second
Wind direction  
Measuring method 4 x 10 Hz ultrasonic sensors
Measuring range 0 ... 359,9°
Resolution 0.1°
Accuracy < 2° (> 1m/second) RMSE
Threshold 0.1 m/second
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/second)
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
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
Material seawater resistant AlMg3Si aluminum alloy
Fastener (Ø)
Protection and standards  
Type of protection
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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