The tubular penetrometer is used to classify soil samples according to their compressive strength. This operation is simple, practical and fast. To perform the test simply push the sliding ring until the lower valve on the scale is reached, then press the penetrometer against the soil sample to the line engraved on the piston, then read the result. The scale reads directly the compressive strength in Kg/sqcm or in Kg. As in most non-destructive diagnostic tests, for a higher reliability on the data security, it is advisable to perform more tests on the same kind of soil.
A table that helps reading the data, giving the ideal ranges of permissible load depending on the kind of soil analyzed, is provided with the tool.