Many materials are sensitive to humidity and/or temperature. In changed climatic conditions, they can change their properties such as consistency, color or structure, thereby influencing their characteristics for further processing. It is therefore important that ideal environmental conditions prevail in the production, storage or processing of such products, e.g. paints, rubber, plastics, leather, fabrics and paper.
To this end, instruments are used to monitor relative air humidity, temperature or dew point.