With a multi-unit, different measuring tasks can be performed (depending on the field of application) by selecting the appropriate probe or accessories.
For measuring devices of this type, accessories or a measuring probe can be added at a later date (within the respective area of application).
As an example we take the Hydromette BL H 40, which is suitable for resistance-based wood moisture measurements. A different wood moisture probe can be connected to the Hydromette at any time. So if you own the starter set with the M 20 drive-in electrode, you can expand it by purchasing an M 18 ram-in electrode.