The Lufft WS300-UMB is a product of professional intelligent measurement tranducers with digital interface for environmental applications. The WS300-UMB is a compact weather station for air temperature, relative humidity 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. Measurement data are available for further processing in the form of a standard protocol (Lufft-UMB-protocol).