The Lufft WS401-UMB is a product from the "WS" compact weather station family. The compact WS weather stations are intelligent, digital sensors for various meteorological applications. The WS401-UMB has a forced ventilated weather cabin and measures air temperature, relative humidity, precipitation and air pressure. The tipping bucket measures 0.2 or 0.5 mm of rain per pulse. Optionally, one external temperature sensor can be connected. As standard, the WS weather stations have a digital output with, among other things, Modbus RTU.