Digital wind speed sensor DHV 39

DHV39 is a rotating, optoelectronic sensor with frequency pulse out, for measuring wind speed. 

  • Low-threshold starting speed
  • Resistant to all weather conditions
  • Anodized aluminum
  • Different output signal
  • Type calibrated in wind tunnel
  • Minimal maintenance
  • Suitable for national met office


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DHV39 is made of naturally anodized aluminum. High-quality sealed radial ertalyte and sapphire bearings are used in the rotating measuring system. Lightweight polymer three-cup assembly (Robinson’s cross) rotates a stroboscope disc across the light beam, generated by a long-life IR diode. Interruption of the beam causes a pulse output of a frequency proportional to the wind speed. All electronic elements are protected against overvoltages by resistors and Zener diodes.

DHV39 is connected to the measuring system by 4-pin weatherproof connector, located on the bottom of the sensor. There is also a mounting support (hole 25 mm in the diameter, 40 mm deep).

Construction of sensor requires minimal maintenance. Even after years of use, when inexpensive and easily replaceable bearings are worn, measurements are almost unchanged. Normal additional mechanical load (freezing) cannot damage the sensor. The DHV39 wind speed sensor is usually paired with a DSV39 wind direction sensor, it is usual fixed to the CRSA39 crossarm, which contains a junction box and all required cables. 

Product references

Measuring range

0 m/s – 50 m/s

Starting speed

0.1 m/s

Distance constant

aprox. 3m fluid flow past the sensor required to cause it to respond to 63,2%


+/- 0,5 m/s


0,1 m/s


20 imp/m

Measuring system

stroboscopic disk, optoelectronic transducer

Output signal

pulse signal, frequency 1 kHz at 50 m/s

voltage output 0…10V

current output 4…20 mA

Power supply

12 VDC

Power consumption

10 mA

Operating temperature

-50 to + 60 ° C

Storage temperature

-50 to + 80 ° C


Souriau, 4-pole, weatherproof


3 wire, shielded


ϕ 200 x H 270 mm


500 g


mounting bracket, bore ϕ 25mm X deep 40mm


body - anodized aluminium
Robinson's cup – UV stabilized plastic


Datasheet DHV39  DHV39_EN.pdf 
Wind speed factory test   
Digital wind speed sensor DHV 39
Digital wind speed sensor DHV 39
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