Thermohygrograph
A thermohygrograph (also thermo-hygrograph ) is a combined recording device for the simultaneous measurement and recording of the air temperature and the relative humidity during a certain time. The individual devices are the thermograph and the hygrograph . Thermohygrographs are mainly used in meteorology as a component of weather stations , but are also used in museums, building services , storage and transport as well as in the construction industry (e.g. in building repair and sealing). A meteorograph is the extension with a barograph .
Classic models are realized as drum recorders with bimetal , natural hair and mechanical or electronic clockwork, whereby the drum can have a cycle time of one, seven, 14 or 31 days. The measured values are recorded as measurement curves on paper.