Besides the use standard sample holders with a diameter of 13, 25 and 47 mm, it can be advisable to upscale the size of the sample. If the pore density per mm2 is too low to obtain stable, readable gas flows, then the use of e.g. a sample with a diameter of 50 cm can be really helpful.

Porometer.com is happy to create costumer specific designs for special samples: large cilinders, assembled fiter-setups, etc.