SYSTESTER GTR-7004 Gas Permeability Tester for Battery Separators and Functional Membranes

Overview

The SYSTESTER GTR-7004 Gas Permeability Tester is a precision-engineered instrument designed for quantitative determination of air permeance—expressed as time required for 100 mL of air to pass through a defined area of specimen under standardized differential pressure—across thin functional membranes and porous sheet materials. It operates on the principle of constant-pressure airflow measurement per ISO 5636-5 and ASTM D726, where a regulated air stream is driven across a clamped sample at fixed upstream pressure (20 kPa), and elapsed time for 100 mL volumetric displacement is recorded with 0.1 s resolution. This gravimetric-time method delivers high reproducibility for quality control and R&D applications in battery separator development, proton exchange membrane (PEM) validation, gas diffusion layer (GDL) characterization, and packaging barrier assessment. The instrument’s mechanical architecture prioritizes stability and repeatability over automation speed, making it suitable for laboratories requiring traceable, standards-compliant permeability data without full robotic integration.

Key Features

• Industrial-grade 7-inch TFT touchscreen with zero-level navigation UI—no menu nesting; all core functions accessible within one tap
• Manual sample clamping mechanism with calibrated torque feedback, ensuring consistent compressive load and eliminating gasket-induced variability
• Manually adjustable upstream pressure regulator with analog gauge and digital readout (±0.01 kPa accuracy)
• Multi-unit display capability: s/100 mL (air permeance) and μm/Pa·s (permeability coefficient) calculated in real time per ISO 5636-5 Annex B
• Integrated thermal-printer module supporting on-demand hardcopy output of test parameters, timestamp, operator ID, and result
• Hardware-based overpressure cutoff circuitry that halts airflow and alerts user upon detection of >20.5 kPa deviation
• Standard RS-232 and USB-B interfaces for bidirectional communication with LIMS or custom QA software; Modbus RTU protocol support available via firmware update

Sample Compatibility & Compliance

The GTR-7004 accommodates rigid and semi-flexible planar specimens up to 5 mm thick, including lithium-ion battery separators (polyolefin microporous films), anion/cation exchange membranes, carbon paper substrates, filter papers, nonwovens, and coated packaging laminates. Standard test area is 1.0 in² (6.45 cm²), with optional 0.25 in² (1.61 cm²) and 0.1 in² (0.645 cm²) measurement heads for small-area or high-gradient materials. All configurations comply with the geometric and procedural requirements of ISO 5636-5 (determination of air resistance of paper and board), ASTM D726 (standard test method for resistance of paper to passage of air), TAPPI T460 (air resistance of paper), and GB/T 36363–2018 (test method for air permeance of lithium-ion battery separators). Calibration traceability is maintained using NIST-traceable reference filters supplied with optional calibration kits.

Software & Data Management

While the GTR-7004 operates as a standalone unit, its serial interface enables seamless integration into regulated environments. Raw test data—including start/stop timestamps, pressure stabilization status, elapsed time, calculated permeance, and operator code—is exportable as CSV or TXT files. When deployed in GLP or GMP settings, the system supports audit trail generation via external data acquisition software compliant with FDA 21 CFR Part 11 (electronic records and signatures). Optional SYSTESTER DataLink™ software provides automated report generation, statistical process control (SPC) charting, and batch-level trending aligned with ISO 9001 documentation requirements. All firmware updates are digitally signed and version-logged to ensure configuration integrity during regulatory inspections.

Applications

• Quality assurance of microporous polyethylene (PE) and polypropylene (PP) battery separators during roll-to-roll production
• Comparative evaluation of hydrophobic/hydrophilic treatments on PEM fuel cell membranes
• Validation of pore uniformity and tortuosity in carbon fiber paper used in electrochemical reactors
• Regulatory testing of medical packaging breathability per ISO 11607-1
• R&D screening of nanocellulose aerogels and MOF-integrated composite films for controlled gas release profiles
• Supplier qualification against OEM-defined air permeance windows (e.g., 200–400 s/100 mL for EV battery stacks)

FAQ

What gases can be used besides compressed air?
Clean, oil-free, dry air is the default test medium per ISO 5636-5. Nitrogen may be substituted if inert atmosphere testing is required; however, viscosity corrections must be applied manually per ISO 5636-5 Annex C.
Is the instrument suitable for wet or humid samples?
No. The GTR-7004 is designed exclusively for dry-state permeance measurement. Samples must be conditioned per ISO 187 prior to testing to ensure stable moisture content.
How often does the system require recalibration?
Annual calibration is recommended. Full metrological verification—including pressure transducer linearity, timer accuracy, and flow-path geometry—should be performed using SYSTESTER-certified calibration standards traceable to national metrology institutes.
Can multiple test areas be switched without tooling?
Yes. The interchangeable measurement heads feature quick-lock bayonet mounts and automatic recognition via embedded RFID tags, enabling area switching in under 90 seconds without manual parameter re-entry.
Does the device meet FDA or EU MDR requirements for medical packaging testing?
While not a medical device itself, the GTR-7004 generates data fully compliant with ISO 11607-1 Annex A and EN 868-10 for permeability verification of sterile barrier systems, provided test protocols are documented and validated per QSR 820 and ISO 13485.