The rocks are porous so they have lots of small connected holes which water can seep into. Before the rock is put in the water the pores contain air at either standard atmospheric pressure or at -0.9 atmospheres (we often partially evacuate the samples to speed up the rate at which they soak up...
Thanks for the suggestions.
Suspending the sample on a wire that passes through the wall of the pressure vessel would require some pretty good seals and I would be worried about what effect they would have on the recorded weight.
Weighing the whole pressure vessel introduces some interesting...
We want to measure the rate of water absorption of rock samples placed in a flooded pressure vessel.
Traditionally to do this you would have to depressurise the chamber, open its top and weigh the sample while it is still suspended in the water. We are looking for a way to skip having to open...
