water permeable tube height is very big, the testing precision can be closer to the real one

TST-70 Permeability Testing Mchine (Permeameter)

Main technical parameters:

lnner tube diameter	φ100+0.22mm
Water permeable tube height	400mm
Distance between measuring pressure pipes	100±0.44mm

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Permeability Testing Mchine (Permeameter)