[AllyCat]

This system is interesting for the short gusts of wind.

Hi,

Yes it is a very interesting product, particularly for "extreme" weather conditions.  But the apparent price of 575 Euros + VAT is rather high.  It would be interesting to know how accurately it (or the Davis) can measure when there is  both wind and rain at the same time.

However, it is possible to achieve much shorter measurement intervals (or in very low windspeeds) by timing the period between two consecutive pulses from a cup anemometer (instead of counting the number of pulses in a fixed time).  But normally for meteorological purposes, a value over a "standard" time period (2 - 3 seconds for gust, 10 minutes for average) is required.

OT:  That a cup anemometer can respond quickly is demonstrated by the "Raymarine RotaVecta" principle which must change speed (and measure the time) within a small fraction of a single revolution of the cups.  See for example post#10 in another forum.

Cheers,  Alan.