Meteograph

A thermo-hygrograph (also thermo-hygrograph) is a combined recording device for simultaneously measuring and recording air temperature and relative humidity during a certain period of time. The individual devices are the thermograph and the hygrograph. Thermohygrographs are mainly used in meteorology as part of weather stations, but are also used in museums, building services, storage and transport, as well as in construction (e.g. building repair and sealing). A meteorograph is an extension with a barograph.