The sketch on the right shows the electrical field in a uniform material. The field is distorted if the material is not uniform as in the centre and right sketch.
When combined with the sonic tomograph, the EI tomographs offer advanced information about the tree. In many cases the result can be used to analyse the type of decay or help to distinguish between cavities and ‘wet’ diseased wood. Water transportation in the trunk can be analysed by scanning a tree at several levels.
The tests are easy to perform: the wires of the TreeTronic are connected to the nails used for the sonic investigation and the measurement runs automatically.