Gurley 4340 Smoothness Tester and Densometer

Gurley microprocessor controlled densometer to provide a result in seconds, regardless of the sheet porosity. Measures smoothness and porosity. Sample strip drive included.

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.


  • 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

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.

• Air permeability and smoothness testing with one instrument
• Automatic and manual testing
• RS-232 interface and printer connection
• Automatic sample transport
• Rapid results
Statistical analysis of results including: Air permeability Smoothness
• standard Gurley (corresponding Model 4110, 4190) • standard Gurley
• low-pressure Gurley (corresponding Model 4118) • calculated Sheffield units
• high-pressure Gurley (corresponding Model 4150, 4250) • calculated Bekk units
• calculated Sheffield units • calculated Bendtsen units
• calculated Bendtsen units
Physical specifications:

  • Dimensions – 23.5 x 40 x 32 cm (W x L x H)
  • Net weight – 13 kg

  • Compressor and air filter/regulator/dryer combination
  • Dot matrix printer, roll fed
  • Interchangeable orifices
    (1.0 standard, 0.25 and 0.10 sq in optional)
Performance data:

  • Power requirements – 220 V, 50 Hz
  • Air supply – Requires at least 4.5 bar

  • Instrument air – minimum 4.5 bar
  • Power – switchable 110/220 V

  • ISO 5636/5, BS 5926, CPPA D-14, SCAN P19, P53, APPITA/AS 1301-420, TAPPI T-460, T-490, T-536-88, ASTM D726-5, D202-77

For further information please contact our sales team on 01223 492081 or via