The penetrometer measurement is a simple and yet very sensitive method of determining the penetration resistance in the soil. This value is of great importance both for agriculture and for the assessment of building ground. The soil compaction, for example in the driving tracks of agricultural equipment, but also the success of processing technologies can be assessed. For construction projects the penetration resistance is a sign of stability and the load bearing capacity of the soil. Type of soil, density, soil moisture, humus content and coarse soil content are factors influencing the penetration resistance. In view of this bandwidth of influencing parameters and the simple handling, penetrometers are very well suited to make statements about the homogeneity of soil areas.