Yuelian PW-6616 Paper Air Permeability Tester

Overview

The Yuelian PW-6616 Paper Air Permeability Tester is a microprocessor-controlled, fully automated instrument engineered for precise and repeatable measurement of air permeance across paper, paperboard, and other thin sheet materials. It operates on the pressure-differential (manometric) principle: a conditioned specimen is clamped between two sealed test surfaces, establishing a controlled pressure gradient across the sample. The volumetric airflow rate through a defined test area (10 cm²) under calibrated differential pressure (adjustable from 0.05 to 6 kPa) is measured in real time using high-stability flow sensors. Permeance is then calculated per standardized definitions—expressed in SI-derived units (μm/(Pa·s)), Gurley seconds (s), cubic centimeters per minute (mL/min), or the dimensionless Canadian Unit (CU). Designed to meet the stringent metrological requirements of global pulp & paper laboratories, the PW-6616 supports multiple internationally recognized test protocols—including Schopper-Riegler (SR), Bentzen, and Gurley—ensuring methodological flexibility without compromising traceability or inter-laboratory comparability.

Key Features

• Triple-sensor architecture with imported U.S.-sourced pressure transducers and mass flow sensors, delivering long-term stability and measurement reproducibility <±0.5% RSD over 100 consecutive tests.
• Programmable pressure differential control enables adaptive testing: low-permeability substrates (e.g., cigarette paper, filter media) are evaluated at elevated ΔP (up to 6 kPa), while high-permeability grades (e.g., sack kraft, tea bag paper) are tested at lower gradients (down to 0.05 kPa) to maintain laminar flow conditions and minimize compressibility artifacts.
• Industrial-grade 7-inch capacitive touchscreen interface with dual-language (English/Chinese) firmware, supporting intuitive test setup, real-time flow monitoring, and on-device data review.
• Integrated thermal compensation algorithm corrects for ambient temperature fluctuations (15–30 °C operating range), ensuring consistent output regardless of lab environmental drift.
• Automated clamp actuation with pneumatic-assisted sealing eliminates operator-induced variability in specimen loading force and gasket compression—critical for maintaining uniform test area integrity and minimizing edge leakage.
• Onboard non-volatile memory stores ≥10,000 test records with timestamp, operator ID, method ID, and raw sensor outputs; exportable via USB 2.0 to CSV or XML formats.

Sample Compatibility & Compliance

The PW-6616 accommodates flat, non-porous, and semi-porous sheet materials up to 3 mm thickness and minimum dimensions of 100 × 100 mm. Its A-type configuration is validated for packaging papers (kraft, corrugating medium), technical papers (thermal, carbonless), filtration media (laboratory filter paper, coffee filters), and specialty grades (label facestocks, release liners). All measurement routines adhere to the physical definitions and procedural constraints outlined in ISO 5636-2 (air resistance at 1 kPa), GB/T 458 (Schopper-Riegler method), and YC/T 172 (cigarette paper permeability specification). Instrument calibration traceability follows ISO/IEC 17025 guidelines, with factory-certified verification against NIST-traceable laminar flow standards. The system supports GLP-compliant operation through configurable user access levels, electronic signature prompts, and audit trail logging (optional firmware module).

Software & Data Management

Embedded firmware provides full method management: users select preloaded test templates (Gurley, Bentzen, ISO 5636-2) or define custom pressure setpoints, dwell times, and unit preferences. Real-time graphs display flow vs. time curves with automatic endpoint detection based on flow stabilization criteria (±0.5% variation over 5 s). Data export includes metadata such as environmental humidity (optional external hygrometer input), barometric pressure, and calibration certificate IDs. For enterprise integration, optional PC software (Yuelian LabLink v3.2) enables remote instrument control, statistical process control (SPC) charting (X̄-R, Cpk), and automated report generation compliant with FDA 21 CFR Part 11 requirements—including electronic signatures, change history, and secure user authentication.

Applications

• Quality assurance of cigarette paper permeability for controlled burn rate and tar delivery in tobacco manufacturing.
• Validation of barrier performance in food-grade packaging boards subjected to modified atmosphere packaging (MAP) specifications.
• R&D evaluation of nanocellulose-reinforced papers where subtle changes in pore structure significantly affect breathability and moisture vapor transmission.
• Conformance testing of medical packaging papers (ISO 11607-1) to ensure sterilization compatibility and microbial barrier integrity.
• Process optimization in paper machine operations—correlating basis weight, refining degree, and filler content with permeance trends across production batches.

FAQ

What pressure differentials can be applied during testing?

The PW-6616 allows continuous adjustment from 0.05 kPa to 6.00 kPa in 0.01 kPa increments, enabling method-specific compliance and material-appropriate flow regime control.
Does the instrument support automatic calibration verification?

Yes—built-in self-diagnostic routines verify zero offset and span accuracy prior to each test sequence using internal reference resistors and flow restrictors; full calibration requires external certified flow standards.
Can test results be exported directly to LIMS systems?

When equipped with LabLink software and Ethernet connectivity, the PW-6616 supports ASTM E1384-compliant HL7 messaging and direct SQL database writes via ODBC drivers.
Is the 10 cm² test area configurable for alternative sizes?

No—the test head geometry is fixed at 10 cm² per ISO 5636-2 and GB/T 458 requirements; however, optional auxiliary fixtures (sold separately) enable adaptation to 20 cm² for specific R&D applications under documented deviation protocols.
How is operator error minimized during specimen loading?

The pneumatic clamping system engages only when proper gasket alignment and specimen flatness are confirmed by integrated proximity sensors—preventing invalid tests due to misalignment or wrinkling.