• When the wind speed is lower than 5m/s,the
dispersion of wind direction will increase.
• The primary power source for the sensor is the solar
panel. When available solar power (light over recent
period) is insufficient, the batteries will be used.
9.Attention
9.1 About daily rain deviation
Figure 7: Daily rain deviation for WH40 and WS90
The daily rain deviation of WS90 is very small in the
long run, but under certain conditions the deviation
can be larger: as the rain drop size and wind speed can
have different impacts on the sensor output which lead
to this variance.
The WS90 product suffer from this imperfectness. If
you are very demanding on rain data accuracy, we
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