Vaisala Wind Set WA15


Wind Set WA15 Anemometer and wind vane with crossarm and power supply


    • High-performance wind measurement set
    • Long and successful track record in meteorological applications
    • Low measurement starting threshold
    • Conical anemometer cups provide excellent linearity
    • Heated shaft prevents bearings from freezing
    Technical Specifications

     Technical Specifications

    Wind speed


    Sensor / transducer type
    Measurement range
    Starting threshold
    Distance constant
    Accuracy (range 0.4...60 m/s)
        with characteristic transfer function
        with transfer function U=0.1xR

    cup anemometer / opto-chopper
    0.4...75 m/s
    <0.5 m/s *
    2.0 m

    ±0.17 m/s **
    ±0.5 m/s

    * Measured with cup wheel in position least favoured by flow direction. Optimum position gives approx. 0.35 m/s threshold.
    ** Standard deviation.

    Wind direction

    ​Sensor / transducer type
    vane / optical code disc

    ​Measurement range
    (wind speed 0.4...75 m/s)

    ​Starting threshold ​<0.4 m/s

    ​Delay distance ​0.4 m

    ​Resolution ​±2.8°

    ​Accuracy ​better than ±3°

    Inputs and outputs

    ​Operating power supply
          WAA151, WAV151

    U=9.5...15.5 VDC, 20 mA typical

    ​Heating power supply
          WAA151, WAV151

    20 VAC or VDC, 500 mA nominal

    ​Output for WAA151 (wind speed)

    ​      Transducer output ​0...75 m/s = 0...750 Hz square wave

    ​      Transfer function U = 0.328 + 0.101 x R
    (U = wind speed [m/s], R = o/p pulse rate [Hz])

    ​      Transducer output
    ​​(Iout < +5 mA) high state > Uin-1.5 V
    (Iout > -5 mA) low state < 2.0 V

    ​Output for WAV151 (wind direction)

    ​     Transducer output ​6-bit parallel GRAY code

    ​     Transducer output
    ​(Iout < +5 mA) high state > Uin-1.5 V
    (Iout > -5 mA) low state < 1.5 V          

    Operating temperature


    With shaft heating
    Storage temperature

    -50...+55 °C (-58...+131 °F)
    -60...+70 °C (-76...+158 °F)

    For complete specifications, please see the datasheet or user guide in "Documents".

    Related Services
    • Warranty 
    • All Vaisala products and services are covered by a 12-month warranty as standard, with selected products covered for up to 24 months. During this period you benefit from free repair or replacement of faulty equipment.
    • Warranty 
    • Service Center Repair  
    • If your instrument requires repair.