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, are available:
To perform the permeability test it is also necessary to order: