Application Notes
24
Hydromette BL A plus
5 Application Notes
5.1
Notes for wood moisture measurement
The measurement of wood moisture is carried out with the
Hydromette BL A plus using resistance measurement or capacitive
measurement. The wood moisture is displayed in percent by weight
in relation to absolutely dry wood (ATRO).
5.1.1
Notes for resistance measurement
For resistance measurement, the Hydromette BL A plus works
according to the method of electrical resistance or conductivity
measurement which has been known for years. This process is
based on the fact that electrical resistance is highly dependent on
the amount of moisture in the wood. The conductivity of oven-dried
wood is very low, or the resistance so high that no current worth
mentioning can flow. The more water that is present, the greater
the conductivity of the wood, or the lower the electrical resistance.
Figure 5-1: Measuring across the fibre
direction with M 20
