Home Test Methods Soil Testing Constant Head Permeability Soil Test Equipment Constant Head Permeability Soil Test Equipment The constant head test simply maintains a constant differential in pressure between the top and the base of the specimen (top pressure is always set higher than the base pressure). The flow is then measured on the top controller and the base controller. Please note: Some apparatus may require additional components or software modules to perform certain tests. The following soil test equipment can perform the Constant Head Permeability soil test:- Resonant Column Apparatus (Hardin Type) for constant head permeability soil test Hydraulic Load Frames for Rock for constant head permeability soil test 1000kN (1MN) / 2000kN (2MN) Static Compression Only Loadframe for constant head permeability soil test Environmental Triaxial Testing System for constant head permeability soil test Environmental Triaxial Automated System for constant head permeability soil test GDS Small-Strain Hollow Cylinder Apparatus for constant head permeability soil test GDS Constant Rate of Strain Cell (CRS in Load Frame type) for constant head permeability soil test GDS Consolidation Testing System (Rowe and Barden Type) for constant head permeability soil test Resonant Column Apparatus (Stokoe Type) for constant head permeability soil test GDS True Triaxial Apparatus for constant head permeability soil test GDS Large Diameter Cyclic Triaxial Testing System for constant head permeability soil test Advanced Dynamic Triaxial Testing System for constant head permeability soil test GDS Enterprise Level Dynamic Triaxial Testing System for constant head permeability soil test Hydraulic Load Frames for Soil for constant head permeability soil test Virtual Infinite Stiffness Load Frames for constant head permeability soil test Triaxial Automated System (Load Frame type) for constant head permeability soil test Triaxial Testing System (Automated Stress Path type) for constant head permeability soil test Triaxial Cells for constant head permeability soil test Infinite Volume Controller for constant head permeability soil test High Pressure Volume Controllers 8MPa to 100MPa for constant head permeability soil test Advanced Pressure Volume Controller for constant head permeability soil test Enterprise Level Pressure Volume Controller for constant head permeability soil test Standard Pressure Volume Controller for constant head permeability soil test