Not only an increased supply of rawwood and woood residues in the form of chips, but also aspects concerning the economic use of material in the enterprises of the woodworking indstry make questions relating to the techniques and methods of measurement an issue of particular interest for specialists on behalf of their high accuracy. In order to elucidate practicable methods for this purpose investigations were carried through using commercial immersion probes, which function on the principle of scattered radiation, and enclosed γ sources operating on the principle of transmission in chips of various dimensions and origin. On the one hand the task consisted in the elaboration of calibration curves and in the collection of factors, which exert an influence on the accuracy of measurement, on the other.