Bendtsen Roughness and Air Permeability Tester

The Bendtsen Roughness and Air Permeability tester determines the air permeability and surface roughness according to Bendtsen method and the Gurley porosity is calculated from the measured values.

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Beskrivning

Bendtsen Roughness and Air Permeability Tester

Fully automatised measuring cycle

This device comes with a built in touch-screen and an industrial computer. All the parts are built into a sturdy aluminum frame. The device is equipped with up to 3 measuring heads for top and bottom roughness measurements as well as for air permeability. Flow rate range is 25 – 5000 ml/sec. Other flow rates ranges upon request.

 

Test description

The sample to be tested is placed in the measuring area. By pushing
the start button on the touch screen the measurement cylinders
lower onto the sample. The measuring head is set free and actuated
by gravity on the sample. A pressure difference is generated
between the inner measuring head and the environment. The device
detects the air that’s flowing out between the blade of the measuring
head and the sample. As soon as the flow is stable the device shows
the values in ml/sec on the display. The air permeability head lowers
on the surface of the sample as well and locks the measuring area
towards the outer air. An air stream through the paper is established
and as soon as the flow rate is stable the device shows the values in
ml/min and in Gurley seconds (calculated) on the display.

 

Specifications

  • Flow rate of 5-1000ml; other or extended flow rates upon request
  • Up to two measuring heads: roughness top and air permeability
  • Test pressure selectable according to standard: 0,74kPa, 1,47kPa, 2,20kPa
  • Statistic with graphs, max, min, mean, standard deviation
  • Photocell detection of the sample, automatic start of the measurement
  • RS232 and USB port, Windows based software, CE mark
  • Holder for automatic alignment of the sample made from acrylic glass
  • Automatic compensation of atmospheric pressure
  • Paper thickness range from 60 g/m² up to 200 g/m² and from
    40 µm to 200 µm thickness
  • Testing heads for air permeability and for roughness with photo
    detection cell
  • Display of the values (Instrument with 2 heads) and calculation
    of the Gurley values in seconds

 

Technical specifications

  • 3 machine configurations available
    • Bendsten Roughness
    • Bendsten/Gurley Porosity
    • Bendsten Roughness-Porosity
  • Fully automated measuring cycle, sample is not influenced manually.
  • Adjustable feet for the equipment leveling.
  • Connections
    • Electricity: 110-230V, 50-60Hz (40W)
    • Compressed air: 400-600 kPa
  • Dimensions: 27 x 68 x 60 cm (W x D x H)
  • Net weight: 1 head 23kg, 2 head 28kg

 

Standards

  • ISO 5636-3
  • ISO 5627
  • Tappi T569
  • Tappi 833
  • TAPPI T749
  • DIN 53107
  • BS 4420
  • ISO 8791-2

 


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