GBPI W303 Water Vapor Transmission Rate (WVTR) Tester
| Brand | GBPI |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Country of Origin | China |
| Model | W303 |
| Measurement Range | 0.02–10,000 g/(m²·24h) |
| Measurement Resolution | 0.001 g/(m²·24h) |
| Temperature Range | 15–45 °C |
| Temperature Control Accuracy | ±0.1 °C |
| Humidity Range | 30–90 %RH (standard setpoint: 90 %RH, dual-airflow humidity control) |
| Humidity Control Accuracy | ±2 %RH |
| Sample Thickness Limit | ≤2 mm |
| Sample Diameter | Ø90 mm |
| Test Area | 50.24 cm² |
| Specimen Capacity | 3 chambers |
| Dimensions (W×D×H) | 520×420×340 mm |
| Power Supply | 220 V AC, 50 Hz |
| Compliance | GB/T 1037–1988, GB/T 16928, ASTM E96, ASTM D1653, TAPPI T464, ISO 2528, DIN 53122-1, JIS Z0208, YBB00092003 |
Overview
The GBPI W303 Water Vapor Transmission Rate (WVTR) Tester is a gravimetric, three-chamber permeation instrument engineered for precise and reproducible measurement of water vapor transmission through packaging materials and barrier films. It operates on the principle of dynamic gravimetric analysis—where test specimens are sealed between conditioned dry and humid gas streams, and mass gain in desiccant-filled cups is monitored over time under strictly controlled temperature and relative humidity (RH) conditions. This method conforms to the fundamental requirements of ASTM E96 (desiccant method) and GB/T 1037–1988, ensuring traceable, standardized barrier performance evaluation for regulatory and quality assurance applications.
Key Features
- Triple independent test chambers enable parallel evaluation of up to three specimens—significantly improving throughput without compromising inter-chamber repeatability.
- High-stability dual-airflow humidity control system delivers precise RH regulation from 30% to 90% RH (±2% RH accuracy), with factory-default 90% RH alignment for standard compliance testing.
- Integrated Peltier-based temperature control maintains chamber setpoints from 15 °C to 45 °C with ±0.1 °C uniformity across all three cells—critical for evaluating temperature-dependent barrier behavior per ISO 2528 Annex A.
- 240,000-color capacitive touchscreen interface with embedded real-time data visualization, automatic calibration prompts, and built-in audit trail logging for GLP-aligned operation.
- Gravimetric detection resolution of 0.001 g/(m²·24h) supports low-permeability material characterization—including high-barrier PVDC, AlOx-coated PET, and multilayer coextrusions—within the full operational range of 0.02–10,000 g/(m²·24h).
- Standardized test area of 50.24 cm² (Ø90 mm) ensures compatibility with international specimen preparation protocols; maximum sample thickness accommodated is 2 mm.
Sample Compatibility & Compliance
The W303 accepts flat, rigid, or semi-flexible sheet materials—including polymer films (e.g., PP, PVC, PET), metallized laminates (Al foil, AlOx, SiOx), paper-plastic composites, pharmaceutical blister lidding, solar backsheet substrates, and medical transdermal patch films. Its design meets mechanical and environmental requirements for testing containers (e.g., bottles, pouches) when used with optional package-specific fixtures. All measurements adhere to internationally harmonized standards: ASTM E96 (Procedure B), ASTM D1653, ISO 2528, GB/T 1037–1988, and YBB00092003 (Chinese pharmaceutical packaging standard). Data output includes raw mass vs. time plots, linear regression slope calculation, and final WVTR values with coefficient of determination (R² ≥ 0.98 required for report validity).
Software & Data Management
GBPI’s proprietary WinWVTR software provides full instrument control, automated test sequencing, and compliant data handling. Features include user-level access control (administrator/operator roles), electronic signature support, and timestamped audit trails meeting FDA 21 CFR Part 11 requirements for electronic records. Raw data files are saved in encrypted .WVT format with embedded metadata (operator ID, calibration status, environmental logs). Export options include CSV, PDF reports (with configurable templates), and direct integration with LIMS via OPC UA or TCP/IP protocols. Software updates and remote diagnostics are supported through secure TLS-encrypted cloud channels—enabling proactive maintenance without onsite intervention.
Applications
- Quality control of food packaging films for shelf-life prediction under accelerated storage conditions.
- Development and validation of high-barrier coatings for flexible electronics encapsulation.
- Regulatory submission support for pharmaceutical primary packaging per ICH Q5C and USP <671>.
- Comparative analysis of biodegradable films (PLA, PHA, starch blends) under varying RH gradients.
- Failure analysis of moisture-induced delamination in multilayer laminates used in medical device pouches.
- Stability testing of OLED display encapsulation layers and photovoltaic backsheet adhesion integrity.
FAQ
What is the minimum detectable WVTR value for the W303?
The instrument achieves a resolution of 0.001 g/(m²·24h), with validated lower limit of quantification (LOQ) at 0.02 g/(m²·24h) under standard 90% RH / 38 °C conditions.
Can the W303 test non-planar packages such as bottles or sachets?
Yes—when equipped with optional container test fixtures, the system accommodates rigid and semi-rigid packaging forms per ASTM D3079 and GB/T 16928 guidelines.
Is calibration traceable to national standards?
All units ship with NIST-traceable 200 g calibration weights and certified reference membranes (certified by CNAS-accredited labs); annual recalibration services include uncertainty budgets per ISO/IEC 17025.
Does the software support 21 CFR Part 11 compliance?
Yes—WinWVTR implements role-based authentication, electronic signatures, immutable audit trails, and data integrity safeguards required for regulated environments.
What maintenance is required during routine operation?
Daily desiccant replacement in test cups, weekly seal inspection, and quarterly verification of RH sensor drift using saturated salt solutions per ISO 11140-1.
