This unit measures the air permeability and smoothness of many different types of sheet materials. The Gurley Smoothness Tester & Densometer combines the capabilities of textile, standard and high-pressure densometers, S-P-S testers as well as programmable digital timers.

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Applications:

• Manufacturing and printing – to control the selection of materials affording the appropriate degree of liquid (ink, varnish, sizing) absorption
• Testing filters, porous bags and materials where controlled porosity is essential
• Testing insulating materials for air resistance
• As a supplement to other physical tests, enabling regulation of manufacturing process to give the desired formation, appearance or strength, there being a close correlation between air permeability and the other properties of a material

Overview:
Model 4340N differs from the traditional manual densometers in several ways:

It uses up-to-date mass flow and servo-regulator technology to provide a quick, accurate, oil-free test

Its pneumatic cylinders ensure a consistent clamping pressure and an automatic test feature, enabling a sample to be tested several times without the test area having to be opened continually and closed manually

The addition of an auto-drive mechanism enables the number of tests as well as the span that they are tested over to be programmed. A sheet or strip of paper can then be analysed automatically and with outputs in either Gurley seconds, Sheffield, Bendsten or Bekk equivalent seconds

It uses several state-of-the-art mass flow meters and a servo-regulator so that both low- and high-flow materials can be tested accurately between 0 and 50 Gurley seconds.

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