GBPI W900e Gravimetric Water Vapor Transmission Rate (WVTR) Tester
| Brand | GBPI |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Manufacturer |
| Origin Category | Domestic |
| Model | W900e |
| Price | ¥900,000 |
Overview
The GBPI W900e Gravimetric Water Vapor Transmission Rate (WVTR) Tester is a precision-engineered instrument designed for quantitative determination of water vapor permeation through packaging and barrier materials under controlled environmental conditions. It operates on the fundamental principle of gravimetric cup-based methods—specifically, the dual-mode (gain-weight and loss-weight) desiccant/water-cell approach—as standardized in ASTM E96 and GB/T 1037. The system measures mass change over time across a defined test area (33 cm²), enabling direct calculation of WVTR in g/m²·24h (for films/sheets) or g/pkg·24h (for containers). Its architecture integrates thermodynamic stability, laminar airflow control, and high-resolution microbalance technology to ensure reproducible results across low-, medium-, and high-barrier material classes—including polymer films, coated papers, pharmaceutical blister packs, medical device pouches, solar backsheet laminates, and fuel tank polymers.
Key Features
- Nine independent test stations with simultaneous multi-sample capability, supporting parallel evaluation under identical environmental conditions.
- Dual-mode operation: seamless switching between gain-weight (desiccant-filled cup) and loss-weight (water-filled cup) configurations via reversible cup orientation (upright/inverted).
- High-stability microbalance: 210 g capacity, 0.1 mg readability, thermally isolated and humidity-shielded to maintain long-term calibration integrity during extended tests (up to 168 h).
- Precision climate control: temperature range 10–50 ±0.1 °C; relative humidity 5–95% RH (with optional 100% RH mode); programmable air velocity (0.5–2.5 m/s, or low-flow 0.03–0.5 m/s for delicate substrates).
- Patented test chamber design based on computational fluid dynamics (CFD) and thermal uniformity modeling—ensuring spatial homogeneity of T/RH profiles across all nine stations.
- Integrated gas conditioning system: self-regenerating desiccant module and ultrasonic humidification unit eliminate need for consumable cartridge replacement during continuous operation.
- Automated diagnostics: power-on self-test sequence verifies balance zero stability, sensor calibration status, airflow integrity, and environmental setpoint convergence prior to test initiation.
Sample Compatibility & Compliance
The W900e accommodates flat specimens up to Φ74 mm diameter and ≤3 mm thickness—including monolayer and multilayer plastic films (e.g., PET, OPP, PVDC, EVOH), metallized foils, paperboard laminates, nonwovens, hydrocolloid dressings, and rigid containers (bottles, trays, pouches, cans). It complies with international regulatory and industry standards including ASTM E96 (Procedure A/B), ASTM D1653, ISO 2528, DIN 53122-1, TAPPI T464, GB/T 1037, GB/T 16928, GB/T 17146, GB/T 12704, GB/T 19082, GB/T 21332, and YBB00092003-2015. For GxP environments, optional validation packages support IQ/OQ/PQ documentation aligned with FDA 21 CFR Part 11 and EU Annex 11 requirements.
Software & Data Management
Control and analysis are executed via GBPI’s proprietary WinWVTR software, featuring intuitive workflow navigation, real-time mass drift visualization, automatic slope-based endpoint detection, and customizable reporting templates. The optional GMP Computerized System Module provides role-based user access control, electronic signatures, full audit trail (including parameter changes, balance calibrations, and manual interventions), and data export in CSV/PDF formats compliant with ALCOA+ principles. All raw mass vs. time datasets are timestamped and stored with metadata (operator ID, test ID, environmental logs), ensuring traceability for GLP/GMP audits.
Applications
- Packaging R&D: Barrier optimization of food packaging films, retort pouches, and modified atmosphere packaging (MAP) structures.
- Pharmaceuticals: WVTR validation of blister foil lidding, sachets, IV bags, and desiccant-containing HDPE bottles per USP & Ph. Eur. guidelines.
- Medical Devices: Moisture ingress assessment of sterile barrier systems (SBS), wound contact layers, transdermal patches, and surgical drapes.
- Renewables: Long-term moisture resistance testing of photovoltaic backsheet laminates (e.g., PET/EVA/PE) under accelerated aging protocols.
- Automotive: Fuel permeation screening of polyethylene fuel tanks and EV battery enclosures per SAE J1708 and ISO 11614.
- Consumer Goods: Performance verification of disposable cups, noodle bowls, cosmetic tubes, and hygiene product packaging.
FAQ
What standards does the W900e support for regulatory submissions?
It fully implements ASTM E96 (Procedures A and B), GB/T 1037, ISO 2528, and other cited national/international standards—providing documented compliance for FDA, NMPA, and EMA submissions when used with validated SOPs.
Can the system test rigid containers such as bottles or cans?
Yes—the W900e supports container testing with custom fixtures; WVTR is reported in g/pkg·24h using standardized fill volumes and sealing protocols per GB/T 21332 and ASTM D3078.
Is the balance protected against environmental drift during long-duration tests?
Yes—patented thermal isolation and active humidity shielding minimize thermal expansion and condensation effects; 48-hour repeatability is ≤0.05 g/m²·24h for film samples under ISO-controlled conditions.
Does the system require external compressed air or deionized water?
It requires clean, oil-free compressed air (≥0.6 MPa) for pneumatic actuation and airflow control; no external DI water supply is needed—the integrated ultrasonic humidifier generates saturated vapor on demand.
How is data integrity ensured in regulated environments?
With the GMP module enabled, all user actions, parameter modifications, calibration events, and raw measurements are cryptographically logged with immutable timestamps—meeting 21 CFR Part 11 and Annex 11 electronic record requirements.
