Artificial ventilated weather protection

artificial ventilated protective cover against precipitation and solar UV radiation used with sensors for relative humidity of air and temperature, 
with 7 segments made of weatherproof aluminum,
a good reflectance of radiation and a low heat capacity is provided.
The artificial ventilation is realized by an brushless DC fan inside of an white coated aluminum tube with a diameter of 60 mm the velocity of air inside the tube is approx. 1.5 m/s. This ensures accurate measurement even in absolute calm.