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The PORG-200 is specifically designed to assist universities and other teaching
institutions with the hands on instruction process.
The PORG-200 provides a modern state of the art measuring instrument that allows
the student to go through the measurement process in a structured transparent method.
This instruction-focused design allows the student to build on his basic knowledge
The instrument is based on Boyle’s law and allows the student to make
grain volume measurements on core plugs. This information combined with bulk volume
data allows for the calculation of sample porosity.
The instrument is forgiving in it’s operation and requires neither mercury nor elevated
confining pressures to operate, enhancing user safety.
The core sample is seated in the matrix cup. Helium is isothermally expanded into
the matrix cup from the reference cell. The initial helium pressure of the reference
cell is recorded. The reference cell volume is known and also recorded. The resultant
equilibrium pressure is then measured. Both pressures are measured with the digital
transducer and visually displayed. The original volume of the matrix cup cell is
known. The only unknown is the grain volume and this is resolved using Boyles law.
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