Canadian Standard Freeness Tester (CSF Manual or Digital) - OpTest

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Canadian Standard Freeness Tester (CSF Manual or Digital)

Instrument to determining the pulps refining degrees, according to the Canadian method.

Product Name Canadian Standard Freeness Tester (CSF)
Product Code PTA-0702XX
Standards/Methods TAPPI T 227, ISO 5267/2, BS 6035/2, SCAN C21/M4
Test Material Pulp
Manufacturer The PTA Group / IDM (PTA)
Availability from OpTest Exclusive to Canada

070231 Manual model:
Testing sequence can be started by opening the air valve manually Results can be visually read out on the measuring cylinders


070236 Digital model:
Start button for commencing the process
Touch screen display to read out the measuring data (accuracy ≤ 1° CSF) Ability to save the data of 4 different testing processes


• Stainless steel housing
• Chamber and funnel made of special synthetic material
• Electrical Connection: 230 V / 50 Hz AC (digital model only)
• Weight (equipment only): 25 kg
• Dimensions (W x L x H - equipment only): 360 x 330 x 860 mm


Device Description:
The device consists of a robust stainless-steel frame where the brackets for the chamber and the spreader cone are mounted. The chamber drains into the spreader cone through a FP Innovations calibrated screen plate at its lower end. The chamber can be closed by a bottom lid and a top lid. The top lid holds the air valve, which starts the draining process by opening it. The spreader cone holds the bottom orifice and the side orifice. These orifices allow to measure the Canadian Standard Freeness of pulp.

Test Description:
One liter of suspension, which has been prepared with the standardized disintegrator, needs to be poured into the chamber while the bottom lid is closed. The top lid and the air valve both must be closed. Now the bottom lid can be opened. After opening the air valve mounted on the top lid the draining process starts. The suspension now runs through the calibrated screen plate and leaves behind a fiber mat, while the remaining water falls into the spreader cone. Depending on how fast the water gets to the spreader cone, more or less water will run through either one of the orifices. There is a measuring cylinder placed underneath each orifice. The slower the water drains from the chamber; the more water will flow through the bottom orifice. The amount flown through the bottom orifice in milliliters will give you the freeness of the pulp tested according to 5267-2 (Canadian standard method).



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