After trying a Beisser purchased and the plant, I can say that these public power plants may be decorative but are absolutely not measuring instruments. Accuracy is ridiculous, measuring the wind speed is completely distorted by a very low sampling frequency surely not too draining the batteries but suddenly the measurements are at least halved? The rain sensor is very sensitive to horizontal vibrations and therefore easy to use. The battery compartments are fitted with seals. THANK YOU AMAZON FOR RETURN MANAGEMENT WITHOUT DISCUSSION, PERFECT. I ended up buying a central DAVIS, obviously more expensive but it looks like a deliberate instrument and measurements are finally reliable.
