The GMK 210 is a capacitive material moisture measuring device with direct moisture  display in percent. It is optimally suited for home and handicraft. 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 sidemounted switch the measuring depth 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.