Constant / Falling Head Permeability Test Sets

Constant / Falling Head Permeability Apparatus Set is used to determine the coefficient of permeability for the laminar flow of water through granular soils. These economical Permeameters have the versatility for use with either constant head or falling head methods. Each set includes a permeameter, Single Tube Manometer with Constant Head Reservoir, and Porous Stones or Perforated Plates, depending on permeameter size. They are not equipped with sidewall manometer ports, therefore do not meet requirements of ASTM / AASHTO methods. Permeameters are offered with inside diameters from 2.5in (63.5mm) — 9in (228.6mm) and are sized for sample lengths two times the diameter.

All models have clear acrylic chambers for observation during testing and anodized aluminum end caps. A spring applies 5-10lb (2.2-4.5kg) of force against the top stone or screen to prevent soil density changes during the test. Each chamber is equipped with valves, fittings, and either Porous Stones or Perforated Plates. Porous Stones are provided for 2.5in (63.5mm) through 4.5in (114.3mm) diameter models and Perforated Plates are included for 6in (152.6mm) and 9in (228.4mm) versions.

Features:

• Economical and versatile for either constant head or falling head methods
• Anodized aluminum end caps
• Clear acrylic test chamber
• Quality fittings for easy operation and long life

Included Items:

• Constant / Falling Head Permeability Test Sets
  • 2.5in includes two 50247014 Porous Stones
  • 3in includes two 50295514 Porous Stones
  • 4.5in includes two 50448012 Porous Stones
  • 6in includes two 38061P Perforated Plates
  • 9in includes two 38091P Perforated Plates
• 3859 Single Tube Manometer with Constant Head Reservoir
• Tubing

Accessories:

• 3880 or 3881 Constant Head Tanks supply water to permeameters during testing
• 3701 Permeability Compaction Hammer for compacting remolded soil samples
• 3858 Single Tube Manometer is an additional manometer for multiple tests when measuring soil permeability
• 3859 Single Tube Manometer with Constant Head Reservoir is included and can also be purchased as an additional unit for use in conducting multiple tests
• Constant / Falling Head Permeameters are available in five diameters and are used in determining permeability of granular soils
• 50247014 2.47in Diameter Porous Stone, 0.25in Thick helps keep fine sample particles from passing into the permeameter during testing
• 50295514 2.955in Diameter Porous Stone, 0.25in Thick fits in chamber to allow permeants to flow during testing
• 50448012 4.48in Diameter Porous Stone, 0.50in Thick for use with 4.5in permeameter to minimize the amount of fine particles flowing during testing
• 38061P 6in Perforated Plate supports the soil sample and allows for flow of permeant liquid
• 38091P 9in Perforated Plate for use with 9in permeameter to support sample