Vaisala Wind Set WA25

​​​​​​​​

Anemometer Wind Set WA25 fully heated, accurate wind speed and wind direction measurement
    Overview

     Overview

    • Non-freezing, all-weather wind set for arctic conditions
    • Fully heated anemometer and wind vane (heating in cups and vanes, sensor bodies and bearings prevent snow build-up and ice formation)
    • High performance, accurate wind speed and wind direction measurement
    • Low measurement starting threshold
    • Conical anemometer cups provide excellent linearity
    Technical Specifications

     Technical Specifications

    Wind speed


    ​Sensor / transducer type                                         
    ​cup anemometer / opto-chopper

    ​Measurement range ​0.4...75 m/s

    ​Starting threshold ​<0.5 m/s *

    ​Accuracy (range 0.4...60 m/s)
        with characteristic

    ±0.17 m/s **

    ​transfer function
        with transfer function U=0.1xR

    ±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)
    ​0...360°

    ​Starting threshold
    ​<0.4 m/s

    ​Delay distance ​<0.5 m

    ​Resolution ​±2.8°

    ​Accuracy ​better than ±3°

    Inputs and outputs


    ​Operating power supply

    ​     WAA252 ​Uin = 24 VDC ±10%, max. 3.2 A
    72 W below +2 °C (+36 °F) (heating on)
    1 W above +6 °C (+43 °F) (heating off)

    ​      WAV252
    ​Uin = 24 VDC ±10%, max. 2.1 A
    50 W below +2 °C (+36 °F) (heating on)
    1 W above +6 °C (+43 °F) (heating off)

    ​Output for WAA252 (wind speed)


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

    ​      Transfer function ​U = 0.39 + 0.10 x R
    (U = wind speed [m/s], R = o/p pulse rate [Hz])

    ​      Transducer output level ​(Iout < +5 mA) high state > 11 V
    (Iout > -5 mA) low state < 2 V

    ​Output for WAV252 (wind direction)

    ​      Transducer output ​6-bit parallel GRAY code

    ​      Transducer output level ​(Iout < +5 mA) high state > 11 V
    (Iout > -5 mA) low state < 2 V        

    Operating temperature


    ​With shaft heating ​-55...+55 °C (-58...+131 °F)

    ​Storage temperature ​-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.