Vaisala Wind Set WA25

  • 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
Wind speed
Sensor/transducer typecup anemometer/opto-chopper
Measurement range0.4...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 typevane/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
Accuracybetter than ±3°
Inputs and outputs
Operating power supply
WAA252Uin = 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 output0...75 m/s = 0...750 Hz square wave
Transfer functionU = 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 output6-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".
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