Anemometer to measure the wind speed and the wind direction

Wind Direction, Heavy Duty Design


Wind Direction Sensor; heavy duty design with CNC-manufactured metal housing (seawater resistant aluminium alloy Al Mg  Si 1, black anodized). Special rugged design with improved dynamic features  basing on high precision bearings and optimised balancing.

This sensor is designed for the acquisition and electronic transmission of wind direction data. It is suitable for applications in the field of meteorology and environmental monitoring, e. g. for automatic weather stations, at airports, on research vessels, at industrial sites, for mobile measuring systems etc.

The instrument’s rugged construction and its dust- and water repellent surface, as well as the optional high performance heating enable heavy duty applications like wind energy measurement or operation under severe climatic conditions.

Thanks to various outputs and further options there is a wide range of measuring tasks (refer to Varations).

Electrical design and principle of operation

A rotating magnet at the shaft consist of a magnetic north- and south pole, which venerates a rotating field vertical to the shaft. This rotating field will be detected by an encoder chip on a PCB. The chip has 1024 segments. A full turn of the wind vane equals to 360°.

An electronic circuitry provides an analogue data output.

  • Technical Specification
  • Variations
  • Measuring method: magnetic, contact free
  • Measuring range: 360°
  • Resolution: 0.35°
  • Accuracy: < 1°
  • Max. load: 100 m/s
  • Threshold: < 0.2 m/s (at 90° initial deflection)
  • Damping ratio: < 0.3 (at v = 3 m/s and initial deflection = 15°)
  • Supply: Electronics:
    12…28 VDC; approx. 50 mA

    24 VDC; 0.7 A
  • Data output signal: Analogue:
    0...10 V / 0...20 mA / 4...20 mA
  • Admissible load: approx. 400 Ω
  • Operating temperature: -20…+70°C;
    -40…+80°C (heated)
  • Heating: controlled by thermostat, max. 7 W
    (max. 60 W with high-performance heating)
  • Connection: connector, metal
    IP 67, when plugged in
  • Protection class: IP 65, when operated upright
  • Housing material: Aluminium alloy
  • Dimensions: length: approx. 370 mm
    max. turning radius: 350 mm
    max. housing Ø: 80mm
    pivot: Ø 34 x 40 mm
    weight: approx. 1,015 Kg
  • Compliances: WMO Guide No. 8/7th ed.
    VDI 3786, T.2, 12/2000
  • note 4137.10000…10 V (Supply: 20…28 VDC)
  • note 4137.12000…20 mA (Supply: 12…28 VDC)
  • note 4137.14004…20 mA (Supply: 12…28 VDC)
  • note 4137.1010heated 0…10 V (Supply: 20…28 VDC)
  • note 4137.1210heated 0…20 mA (Supply: 12…28 VDC)
  • note 4137.1410heated 4…20 mA (Supply: 12…28 VDC)
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Heavy Duty Wind Direction Sensor



Combined Wind Speed and Wind Direction Sensor. We recommend the additional installation of a lightening rod.