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  •   Noviprofibre
  •   Made in France

Device to determine the degree of refining of a pulp suspension in water and expressing it in terms of the Schooper-Riegler (SR) number, and to determine the de-watering time.

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  • N6600
  • ISO 5267-1
  • SCAN C 19M3
  • BS 6035/1
  • Product description

    The Schopper-Riegler test is designed to provide a measure of the rate at which a dilute suspension of pulp may be dewatered.


    It has been shown that the drainability is related to the surface conditions and swelling of the fibres, and constitutes a useful index of the amount of mechanical treatment to which the pulp has been subjected. In principle, this method is applicable to all kinds of pulp in aqueous suspension. However, in practice, the Schopper-Riegler test provides acceptable results only if a sufficiently dense mat of fibres is formed on the wire screen. For this reason, the test is not recommended for some extremely short-fibred pulps, such as those from well-beaten hardwoods, as most of the fibres will pass through the wire screen, resulting in anomalous reduction of the SR number. The most reliable results are obtained within the range of 10 to 90 SR number.


    The results of this test do not necessarily correlate with the drainage behaviour of a pulp material on a commercial paper machine.

    How does it work ?

    Technical specifications

    General data
    • Ease of operation and cleaning.
    • Robust equipment made of stainless steel.
    • Adjustable speed of the closing cone (standard 100 mm/s).
    • Pneumatic activation of the release and closing system.
    • Reading of the direct grade of the graduated glass
    • Simple system for recovering paste/pulp.
    • CE Marking
    Log in
    Air : 400 - 600 KPa
    Product weight and dimensions
    38 Kg
    360 x 330 x 850 mm ( WxLxH )
    Scope of delivery
    • Pneumatic Schopper Riegler apparatus
    • 1 sampling cup for concentration to choose between 3, 4 , 5, 6 or 7%
    • 2 Measuring cylinders graduated plastic
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