Microwave Tomography is a test conducted by emitting microwave to the surface of the material via a microwave sensor head. Different materials has different dielectric rate, water has high dielectric constant and this allows trapped moisture to be captured in the tomography. Microwave is emitted from the probes will result in the molecules of water trapped inside the material to vibrate and rearrange. Locations with trapped moisture can be detected by the difference in dielectric constant between the dry areas and those with moisture.

Measuring at 3 depth (30mm, 110mm and 300mm), the location and depth of the trapped moisture can be identified. This is a non-destructive method of testing for presence of trapped moisture and is recommended to be conducted as part of initial tests before conducting specific treatments.

The measurement points will be mapped with the software to generate a tomography, showing the moisture distribution and location of trapped moisture.