An instrument is beeing designed for measurements of difference in absolute humidity. The aim of the project is to enable cheap (energy saving) and efficient control of water content in buildings (especially old churches). This can be done primarily by ventilation when favourable, that is when the difference between indoors and outdoors absolute humidity has the right sign. Relative humidity is measured by means of resistive or capacitive sensors and converted into absolute humidity by means of thermistors.
|Period||01-01-99 → …|