GBPI W401-1 Water Vapor Transmission Rate (WVTR) Tester
| Brand | GBPI |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Manufacturer |
| Country of Origin | Domestic (China) |
| Model | W401-1 |
| Pricing | Upon Request |
Overview
The GBPI W401-1 Water Vapor Transmission Rate (WVTR) Tester is a gravimetrically referenced, dual-chamber, controlled-environment permeation analyzer engineered for precise and reproducible measurement of water vapor transmission through packaging and functional barrier materials. It operates on the principle of dynamic carrier-gas coulometric detection: a conditioned humid gas stream flows over the test specimen’s upstream side while dry nitrogen sweeps the downstream side; water molecules permeating through the sample are carried to a high-stability electrolytic moisture sensor, where real-time concentration quantification enables calculation of WVTR in g/(m²·24h). This method complies with internationally recognized standard test protocols—including ASTM F1249–2013 (for thin films using modulated IR detection), ISO 15106-2:2005 (infrared detection), and GB/T 26253–2010 (Chinese national standard for plastic film WVTR)—and delivers traceable, metrologically sound data suitable for regulatory submissions, quality control, and R&D validation.
Key Features
- Triple independent test chambers with individual temperature/humidity control and autonomous operation—enabling concurrent testing of up to three distinct samples under identical or varied conditions.
- High-resolution detection capability: 0.001 g/(m²·24h), validated for ultra-low-permeability materials including aluminum foil, PVDC-coated films, and SiOx/AlOx barrier layers.
- Precise environmental control: Temperature regulated from 15–45 °C (optional extension to 60 °C) with ±0.1 °C stability; relative humidity controlled across 0%, 30–90%, and 100% RH ranges at ±1% RH accuracy via dual-stream dry/wet gas mixing.
- Modular sample interface: Standard 50.24 cm² test area (Φ100 mm); optional mini-cells support down to 0.785 cm² for micro-scale or high-value specimens.
- Integrated ARM-based embedded system with 7-inch color touchscreen—no external PC required for routine operation, real-time curve visualization (temperature, RH, sensor signal, WVTR), and report generation.
- Comprehensive GMP-aligned software architecture supporting user role-based access control (administrator, operator, viewer), full audit trail (system, method, and run-level), electronic signatures, and 21 CFR Part 11–compliant data integrity protocols.
Sample Compatibility & Compliance
The W401-1 accommodates diverse geometries and material classes per ISO 2528, ASTM D3045, and YBB 00092003–2015 specifications. Film formats include monolayer plastics (e.g., LDPE, PET, OPP), laminates (paper-aluminum-plastic, glassine-Alu), metallized substrates, and barrier-coated webs. Rigid and semi-rigid forms comprise injection-molded containers (PET bottles, HDPE fuel tanks), thermoformed trays (PP, PS), pouches (stand-up, vacuum-sealed), blister packs (PVC/PVDC, cold-form foil), and medical devices (sterile wound dressings, transdermal patches). Specialized fixtures enable testing of cylindrical, conical, and irregularly shaped packages—including beverage cans, pharmaceutical vials, solar backsheet panels, and lithium-ion battery enclosures—under standardized headspace conditioning.
Software & Data Management
The proprietary GBPI PermeaSoft™ platform provides intuitive workflow configuration, automated sequence execution (baseline equilibration, purge, test, recovery), and real-time multichannel monitoring. All raw sensor outputs, environmental setpoints, and calculated WVTR values are timestamped and stored in an encrypted local SQLite database. Reports conform to GLP/GMP documentation requirements: auto-generated PDF/Office exports include instrument ID, calibration history, operator log, environmental deviation logs, and uncertainty statements. Calibration verification uses NIST-traceable GBW(E)130543/4 certified reference standards—certified by the State Administration for Market Regulation (SAMR) of China—and supports in-house recalibration without third-party intervention.
Applications
This system serves critical functions across regulated and industrial sectors: packaging development labs validating shelf-life models for food, pharma, and agrochemicals; QC departments auditing incoming barrier films against ISO 11607–1 for sterile medical packaging; R&D teams evaluating next-generation encapsulation materials for OLED displays and perovskite photovoltaics; automotive suppliers characterizing fuel tank polymer blends per SAE J1737; and battery manufacturers assessing moisture ingress resistance of Li-ion cell housings. Its adaptability to container testing makes it indispensable for compliance with USP , EP 3.2.1, and FDA guidance on primary packaging integrity.
FAQ
What carrier gas is required, and what purity specification must it meet?
High-purity nitrogen (≥99.999% N₂) is mandatory; inlet pressure must be ≥0.1 MPa, with adjustable flow between 5–120 mL/min.
Can the instrument measure oxygen transmission rate (OTR) as well?
No—the W401-1 is specifically configured for water vapor detection using an electrolytic sensor; OTR requires separate instrumentation with coulometric or paramagnetic detection.
Is hardware modification needed to test non-planar samples like bottles or pouches?
Yes—container testing requires optional accessory kits (e.g., custom sealing fixtures, headspace adapters) sold separately; all accessories maintain ISO/ASTM-compliant test geometry and boundary conditions.
How is instrument accuracy maintained over time?
Through periodic verification with GBW(E)130543/4 certified moisture permeation standards and scheduled sensor diagnostics; the system logs all calibration events with digital signature and timestamp.
Does the software support networked data export to LIMS or ERP systems?
Yes—via configurable CSV/XML export protocols and optional OPC UA integration for enterprise-level data synchronization.
