Used to determine the permeability of granular, gravel and sand soils. The specimen is formed in an acrylic permeability cell, and water is passed through it from a constant-level tank. The permeability cell has pressure points at different levels which are connected to the manometer tubes fixed on a stand with a graduated scale. Two constant head permeability cells, formed by an acrylic plexiglass body held between two aluminium anodized end plates.
To perform the permeability test it is also necessary to order: