Country version: UK

WS400-UMB compact weather station for air temperature, relative humidity, precipitation intensity, precipitation type, precipitation quantity and air pressure. Relative humidity is measured by means of a capacitive sensor element; a precision NTC measuring element is used to measure air temperature. Precipitation is measured by way of a 24 GHz Doppler radar, which measures the drop speed of an individual drop of rain/snow. Precipitation quantity and intensity are calculated from the correlation between drop size and speed. The difference in drop speed determines the type of precipitation (rain/snow). Maintenance-free measurement offers a major advantage over the common tipping spoon and tipping bucket processes. Measurement data are available for further processing in the form of a standard protocol (Lufft-UMB protocol).