Product Introduction / Product 简介
The freeness tester operates on the Canadian Standard Freeness method. A diluted pulp suspension of defined quantity is introduced into the instrument, and the time required for a specific volume of water to drain through the fiber mat or the volume of water discharged under standard conditions is measured, with the result expressed as CSF value. The instrument consists of a measuring chamber, drainage chamber, and upper/lower containers, with precision-designed outlet tubes and screens for standardized measurement. It is easy to operate with intuitive results, and is widely used in groundwood pulp production control, monitoring of drainability changes during chemical pulp beating and refining, and providing reliable data support for process optimization and product development.

Key Features / 核心特点
Multi-Standard International Compliance Fully complies with TAPPI T227, ISO 5267/2, AS/NZ 1301, BS 6035 part 2, CPPA C1, SCAN C21 and other international standards, ensuring internationally recognized data.
Wide Range, High Applicability Measuring range of 0~1000 CSF covers various pulp types from low to high freeness, suitable for both groundwood and chemical pulps.
Professional Drainability Evaluation Specifically designed to evaluate drainability changes during beating and refining, providing a core indicator for process control and fiber quality research.
Standard Vertical Structure Standard dimensions of 300×1120×400mm, sturdy structure, intuitive operation, suitable for benchtop placement in laboratories.
Wall-Mounted Structure Option Wall-mounted installation structure available for overseas users, saving floor space and accommodating different laboratory layouts.
Durable and Reliable Construction Net weight of 57.2kg with robust materials ensuring long-term stable operation and measurement repeatability.
False Freeness Indication The instrument can reveal false freeness caused by fines during pulp processing, helping users understand pulp characteristics more comprehensively.
Broad Industrial Application Suitable for pulp and paper, fiber composites, research and quality inspection, and other industries, serving as a fundamental instrument for drainability evaluation.

Main Technical Specifications / 主要技术参数

FAQ / 常见问题
1. What is the difference between freeness (CSF) and beating degree (°SR)?
Freeness (CSF) uses the Canadian Standard Freeness method, measuring the drainage capacity of a pulp suspension, where higher values indicate faster drainage. Beating degree (°SR) uses the Schopper-Riegler method, where higher values indicate more beating and slower drainage. Both evaluate pulp drainability from different perspectives and are suitable for different standard systems and pulp types.
2. Under what circumstances does false freeness occur?
If processing generates a large amount of fine fibers, these fines can block drainage channels and may cause abnormally high freeness readings (false freeness), meaning the values are lower than expected. Actual measurement should be combined with fiber morphology analysis for comprehensive judgment.
3. Is freeness directly related to drainage performance on the paper machine wire?
Not necessarily. Freeness mainly reflects drainage capacity under standard laboratory conditions, while wire section drainage performance is also affected by wire structure, vacuum level, mat thickness, and many other factors. Freeness can serve as a reference indicator but cannot fully replace actual wire drainage performance evaluation.
4. What are the advantages of the wall-mounted structure?
The wall-mounted structure can be installed on a laboratory wall, saving floor space and suitable for laboratories with limited space. This structure is mainly available for overseas users upon request.

5. What is the operating procedure of the instrument?
Inject a quantitative pulp suspension into the measuring chamber, conduct drainage measurement under standard temperature conditions, record the discharged water volume or time, and calculate the CSF value according to the standard method. Specific operations should follow the corresponding standard adopted.
6. Does the instrument require regular calibration?
Periodic verification using standard pulp samples is recommended to ensure measurement accuracy. If deviations beyond the allowable range are detected, contact our after-sales service for professional calibration and technical support.

After-Sales Service / 售后服务
Established in 2007 and with nearly two decades of experience, Shandong Annimet Instrument Co., Ltd. is a professional manufacturer integrating R&D, production, and sales of laboratory testing and sample preparation equipment. Quality is our foundation. We are your bridge from concept to reality. We deliver more than just instruments — we deliver confidence. This Freeness Tester comes with a 12-month warranty and lifetime technical support. Our professional team offers 24/7 service response, free installation guidance, operation training, and freeness testing method consultation. For any inquiries, please contact our customer service team; we are dedicated to providing comprehensive pre-sales, in-sales, and after-sales support. Hotline: 400-9933-057, Email: anmt_test@126.com.