The Campbell Scientific DMM600 duff moisture meter measures volumetric water content of organic forest floor material. It is a portable, battery-powered device that uses measurement methods sensitive to the dielectric properties of the material being measured.
The unit consists of a cylinder that houses the electronics, a sample chamber with a compression knob and an LCD readout.
To measure duff water content, the sample is placed in the sample chamber and the compression knob is turned until an audible indicator signals the sample is properly compressed and the measurement is complete. Total time for measurement is about 30 s. Readings are displayed in real time only and measurements are not stored.
