Gurley Standard Densometer (Type B)

Description

 Paper is composed of a mesh structure with an infinite number of through-holes, concaves, and closed spaces. Air permeability test measures resistance to air that passes through the specimen. There is a relationship between air permeability and paper density, formation, water absorption and printability. Air permeability is a measure of the porosity of paper. This machine measures the air permeability of porous materials including papers, filter paper and packaging paper. The inner cylinder of a specified mass gradually moves oil downward in the outer cylinder. The time necessary for a specified volume of air to pass through the specimen is measured by stopwatch. 

Outer Cylinder: 82.5mm in inner diameter, 254mm high
Inner Cylinder: 76.2mm in outer diameter, 74mm in inner diameter, mass 567 + 0.5g
Air Capacity: up to 350cc (standard 100cc) (optional 400cc)
Circular Area: 645.16mm² (1.00in²)
Outer Dimensions: 230 x 250 x 540mm
Instrument Weight: 12kg