Thies GmbH – 804751 – Nedbørsmonitor, ja/nei og analogutganger

 Operating principle: 

Precipitation in the form of drizzle, rain, snow, or hail falls through a light band, induced by light diodes, and lead to shadowing effects on the receiving side. The sent light is pulse-modulated so that outside light effects cannot falsify the measurement results. From the extent of shading along with the duration of falling through a factor is calculated that gives the information if there is a precipitation incident or not.

The instrument is equipped with a heating system for extreme weather condition. This avoids ice and snow forming on the housing surface. In addition, the surface retains a temperature of >0° by means of a regulated heating.