Noun
A mechanical device that measures the ease of penetration of an object into a semisolid
A device that measures the penetrating power of electromagnetic radiation (especially X-rays)
Source: en.wiktionary.orgEach rover had both a densitometer and a dynamic penetrometer, to test the density and the bearing strength of the soil. Source: Internet
There, they dug a double core and conducted several penetrometer tests along a line stretching convert east of the ALSEP. Source: Internet