penetrometer(redirected from step wedge)
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pen·e·trom·e·ter(pĕn′ĭ-trŏm′ĭ-tər) also pen·e·tram·e·ter (-trăm′ĭ-tər)
1. A device for measuring the penetrating power of radiation, especially x-rays.
2. A device for measuring the penetrability of semisolids.
(General Physics) physics an instrument used to measure the penetrating power of radiation, such as X-rays
an instrument for measuring the degree of penetrability of a solid.See also: Instruments