The GMK 100 is a capacitive material moisture measuring device with direct moisture  display in percent. It is optimally suited for home and handcraft. Depending on the application, it is possible to display the material moisture “u” or the water content “w”. The humidity is measured by a measuring plate on the back of the device. With a  side-mounted switch the measuring depths can be changed. With the help of measurements in different depth a statement could be made if for example the material dries  already or if the moisture is just on the surface of the material.