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58-27 Bendtsen Roughness Tester

The 58-27 Bendtsen Roughness Tester is an advanced microprocessor-controlled instrument for measuring the roughness and air permeance of paper and board using the Bendtsen method. The instrument incorporates significant technological advances to offer accuracy and reproducibility.

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  • Interactive touch screen display
  • Unique extended range 0-5000 ml per minute
  • Easily interchangeable measuring lands
  • Selectable air permeance units in ml/min. or µm/Pa.s
  • RS232 serial data output


  • Included:
    • Ground glass plate, plan weight (four measuring positions), measuring head, roughness only
  • Optional:
    • Air permeance measuring head, hardness weight

Instrument Size (DxHxW)

  • 250 mm (14 in.) x 240 mm (10 in.) x 250 mm (14 in.)


  • 25 kg (55 lb)