METHOD AND DEVICE FOR MEASURING MOISTURE IN STRUCTURAL MATERIAL

摘要

The invention relates to a method and apparatus for measuring structural moisture. In the invention, only a measurement duct (2), in which sensors (7, 9) can be set for the duration of the measurement, is placed inside the structure. Measurement duct (2) is formed from a pipe that is impermeable by vapour, the first end of which is installed at the point inside the structure (1) that is to be measured and the second end of which extends to the surface of structure (1). The second end of measurement duct (2), which extends to the surface of structure (1), is shut off with a vapour-tight plug. A vapour-permeable plug (4) can be fitted to the first end of measurement duct (2) set inside structure (1). The measuring apparatus in turn comprises a measuring unit (5), to which a temperature and moisture sensor (7) and a second temperature sensor (9) are connected. When moisture is measured, the plug closing the second end of measurement duct (2) is removed and temperature and moisture sensor (7) is put in its place. The second temperature sensor (9) is pushed along measurement duct (2) to the first end of measurement duct (2). Once the moisture profile in measurement duct (2) has equalized, the moisture and temperatures are measured, and the moisture prevailing in the surroundings of the first end of measurement duct (2) is calculated from the results. Alternatively, a valve can be set in measurement duct (2), which valve is penetrated by a measuring head containing temperature and moisture sensors.