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Measures the rate of drainage of a diluted pulp suspension

The drainage rate is related to the surface conditions and swelling of the fibers and the test is widely used to track the changes during the beating and refining process. Applicable to all kinds of pulp in aqueous suspension.

In principal the instrument is the same as the Canadian Freeness Tester except that the pulp samples have a lower concentration and the scale is reversed in comparison with the amount of water collected. Complies to ISO 5267/1

The tester has a cast iron base with bullseye level and levelling feet; a stainless steel structure; nickel plated bronze drainage chamber; funnel; spreader cone and sealing cone; Plexiglas safeguard and handle for drainage chamber; ISO standard pneumatic components; hook spanner and fixing base for comfortable exchange of phosphor bronze wire screen

Optional Accessories

  • SR-DDD – Digital Drainability Device for instantaneous and accurate readings
  • SR-DR – Quick Drain Device enables quick and complete remotion of the fiber layer from the drainage chamber
  • Filter for water model GS200UV – 5 L/min according to ISO 14487
Air pressure 2 kgf/cm2 / 0.1 m3/h - instrument quality
Air consumption 0.1 m3/h
Speed of sealing cone (100 ±10) mm/s
Calibrated bottom orifice (149.0 ±1.0) s for 1l of water
Drainage chamber volume 1000 ml
Drainage area 100 cm2
Pneumatic drive 2.0 kgf/cm2
Measuring scales (0-100)
°SR Resolution 1°SR

Dimensions: (330 x 470 x 1440) mm (W x L x H)
Weight: 25 kg

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

Schopper Riegler Freeness Tester
Regmed – Rycobel

Regmed – Rycobel