The GeoPyc from Micromeritics is based on a unique displacement measurement method that uses Dry Flo; a quasi-fluid composed of tiny, rigid spheres with a high degree of flow-ability. The sample is positioned in a bed of Dry Flo, which is then agitated and smoothly consolidated about the sample. The GeoPyc gathers the displacement data, performs the calculations, and prints or displays the results.
- Rapid operation in a small bench-top instrument
- Data acquisition and reporting is fully automated
- Intelligent touch panel for easy operation and reporting
- Highly accurate and reproducible results
- Nondestructive analysis helps to maintain sample integrity
The GeoPyc automatically determines the density and volume of a solid object by displacing Dry Flo, which is a solid medium. This solid medium is a narrow distribution of tiny and rigid spheres that have a high degree of flow-ability, and achieve close packing around the object under analysis.
The particles are small enough that during the consolidation process conform closely to the surface of the object, but do not invade pore space.
Reproducibility and repeatability are accomplished by a controlled process of compaction. The sample cell in which the dry medium is positioned is a precision cylinder. As the cell vibrates, a plunger compresses the powder; the force of compression is selectable and repeatable from test to test.
An initial compaction with only the displacement medium in the cell determines a zero-volume baseline.
Later, the sample is placed in the cylinder with the dry medium and the compaction process is performed again. The difference between the distance (ht) the piston penetrates the cylinder during the test and the distance (h0) the piston penetrates during the baseline procedure (h=h0 - ht) is used to measure the displacement volume of the medium using the formula for the volume of cylinder of height h, V= π r2h.