YT-ATQD Air Permeability Tester

The Air Permeability Tester is used to determine the air permeability of paper, paperboard, and other sheet-like porous materials. It meets the test requirements of various methods, including Schopper, Bendtsen, and Gurley, and is suitable for fields such as papermaking, packaging, printing, tobacco, electronic materials, quality inspection, and scientific research.

The instrument adopts servo-piston constant-pressure flow measurement technology and is equipped with a high-precision differential pressure detection system and an adaptive closed-loop pressure stabilization algorithm. It automatically adjusts the air supply rate according to the air permeability characteristics of the specimen, enabling the differential pressure across the specimen to quickly and smoothly reach the set value. Its overall measurement range covers 0.05–100 μm/(Pa·s). It can simultaneously display test results such as air flow rate, air permeability, CU air permeability, and 100 mL passage time, meeting the testing requirements of different materials and test methods.

The instrument features a fully automatic test design. After the operator places the specimen and starts the test, the instrument automatically completes specimen clamping, establishment of the differential pressure, stability determination, formal measurement, result calculation, and piston return stroke. No manual flow adjustment is required during the test. The test differential pressure, test parameters, and result units can be selected according to different materials, effectively simplifying operation and improving continuous testing efficiency.

The specimen is placed and clamped between the measuring heads. The servo system drives the piston to steadily supply air to the test chamber, creating a preset differential pressure across the specimen. Under the differential pressure, air permeates through the specimen from the high-pressure side to the low-pressure side. The closed-loop control system automatically adjusts the piston speed according to the real-time differential pressure, enabling the differential pressure to quickly enter and remain within a stable range. After the pressure stabilizes, the instrument records the piston displacement, measurement time, and actual average differential pressure during the formal measurement stage. The air flow rate through the specimen is calculated from the calibrated piston displacement volume, and the air permeability of the specimen is automatically calculated based on the test area and the actual differential pressure.

Paper, cultural paper, packaging paper, cardboard, low-to-medium permeability paperboard, cigarette paper, plug wrap paper, tipping paper, filter paper, specialty paper, industrial paper, mica tape, battery separators, as well as some non-woven fabrics, filtration materials, composite materials, and other porous sheets.

● Wide air permeability measurement range: The overall measurement range covers 0.05–100 μm/(Pa·s). Suitable test differential pressures can be selected for specimens with different air permeability characteristics, meeting the measurement requirements of both low-permeability and high-permeability materials.

● Adaptive closed-loop pressure stabilization control: An adaptive closed-loop algorithm is used to adjust the piston air-supply speed in real time according to the air permeability characteristics of the specimen, enabling the test differential pressure to quickly and smoothly reach the set value and reducing repeated manual parameter adjustment.

● Automatic stable-state identification: The system continuously monitors the actual differential pressure and its trend. Once the stability conditions are met, it automatically enters the formal measurement stage, balancing test speed and measurement validity.

● High-precision differential pressure detection: Equipped with a high-precision differential pressure sensor, the specified differential pressure indication error shall not exceed ±0.5%. It can monitor the differential pressure across the specimen in real time, providing reliable data for closed-loop control and result calculation.

● High-precision flow measurement: The air flow rate is calculated from the calibrated piston displacement volume, actual displacement, and measurement time. The specified flow measurement error shall not exceed ±1%. The formal calculation uses the actual average differential pressure during the test, reducing the effect of pressure deviation on results.

● Fully automatic test process: Specimen clamping, pressure build-up, pressure stabilization, measurement, calculation, and piston return stroke are completed with one click. No manual flow adjustment is required, making the instrument suitable for continuous laboratory testing.

● Multiple test modes: Supports timed measurement and fixed-volume measurement. The test differential pressure, stabilization time, and formal measurement time can be set according to material characteristics and testing requirements.

● Simultaneous display of multiple results and units: A single test directly provides air permeability, actual flow rate, average differential pressure, CU air permeability, and equivalent 100 mL passage time. Results are displayed simultaneously in units such as μm/(Pa·s), mL/min, kPa, CU, and s/100 mL, without manual unit switching or conversion.

● Real-time test curve display: Displays the pressure variation curve in real time during testing, facilitating observation of pressure build-up, pressure stabilization, and formal measurement processes and allowing intuitive judgment of the test status.

● Multiple safety protections: Features protection functions such as pressure over-limit, pressure stabilization timeout, sensor abnormality, insufficient piston stroke, and motion limit. In case of abnormality, the test is automatically terminated and the instrument returns to a safe state.

● Multiple data output methods: Supports thermal printing, USB flash drive export, USB/Wi-Fi communication, and other functions.

● Power-failure data protection and online upgrade: Supports saving test data upon power failure. The system and screen software support upgrades via network or USB flash drive.

● Yante Instruments Testing Platform Software (Optional): Supports communication with a computer via Wi-Fi or USB. Instrument control, test parameter setting, and testing operations can be performed on the software side, enabling real-time monitoring of the test process, automatic data acquisition, historical data storage, test curve display, and comparative analysis of multiple data sets. A single software package can connect to and manage multiple Yante testing instruments, facilitating unified management of instruments, test processes, and test data in the laboratory.

● QMS Quality Management System (Optional): Supports rapid upload, query, export, statistical analysis, and full-process traceability of test data. Samples and associated test results can be managed by testing task. It also provides functions such as data unit conversion, result judgment, and test report generation and output, achieving integrated management of testing tasks, instrument data, quality analysis, and reports.

GB/T458、ISO5636/2、QB/T1667、GB/T22819、GB/T23227、ISO2965、YC/T172、GB/T12655  Tappi T460