This study shows the feasibility of measuring the density of a material with an X-ray generator. X-rays are detected in transmission, with a shielded and collimated scintillator. The first measurements were made with homogeneous limestone and aluminium plates. An algorithm has also been developed to determine from the detected photons, the density of the material. The density was resolved with a good accuracy (<5%). The chemical composition was also determined but with lower accuracy (10%).