GBPI W401X Single-Chamber Water Vapor Transmission Rate (WVTR) Tester
| Brand | GBPI |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Manufacturer |
| Origin Category | Domestic |
| Model | W401X |
| Price Range | USD 28,000 – 42,500 |
| Test Range | 0.001–100 g/(m²·24h) |
| Resolution | 0.001 g/(m²·24h) |
| Temperature Control Range | 15–45°C (optional up to 60°C) |
| Temp. Accuracy | ±0.1°C |
| Humidity Control Range | 30–90% RH |
| RH Accuracy | ±1% RH |
| Permeation Area | 50.24 cm² (down to 0.785 cm² with optional fixtures) |
| Specimen Diameter | Φ100 mm |
| Max. Specimen Thickness | ≤3 mm |
| Sample Capacity | 1 unit |
| Carrier Gas | ≥99.999% N₂ (user-supplied) |
| Gas Pressure | ≥0.1 MPa |
| Gas Flow Rate | 5–120 mL/min |
| Gas Inlet | 1/8″ metal tubing |
| Dimensions | 600 × 400 × 330 mm |
| Weight | 80 kg |
| Power | 750 W |
| Supply | AC 220 V, 50 Hz |
Overview
The GBPI W401X Single-Chamber Water Vapor Transmission Rate (WVTR) Tester is a gravimetric-coulometric hybrid instrument engineered for precise, traceable measurement of water vapor permeation through flat and contoured packaging materials under controlled temperature and relative humidity conditions. It operates on the principle of dynamic moisture detection via high-stability infrared (IR) sensor technology coupled with dual-stream humidity generation—where dry and saturated carrier gas streams are proportionally mixed to achieve programmable, stable RH setpoints across the test chamber. This architecture complies with core physical principles defined in ASTM F1249, ISO 15106-2, JIS K7129, and Chinese national standards GB/T 26253 and YBB 00092003, ensuring metrological consistency for regulatory submissions in pharmaceutical, food, medical device, and electronics packaging development and quality control.
Key Features
- High-resolution gravimetric detection with 0.001 g/(m²·24h) resolution—validated using GBW(E)130543/4 certified reference materials issued by China’s National Institute of Metrology.
- Electromagnetic stepwise temperature control system delivering ±0.1°C stability over 15–45°C (extendable to 60°C), minimizing thermal drift during extended permeation assays.
- Dual-gas stream humidity control enabling ±1% RH accuracy from 30–90% RH—critical for evaluating moisture-sensitive barrier layers such as AlOx-coated PET or SiOx-laminated films.
- ARM-based embedded control architecture supporting standalone operation; color touchscreen interface eliminates dependency on external PCs for routine testing.
- Three-tier permeation mode selection (high/mid/low barrier) automatically adjusts gas flow, dwell time, and signal averaging to optimize measurement fidelity across material classes—from ultra-barrier solar backsheet films to breathable medical patches.
- Modular hardware design with field-replaceable IR sensor modules, sealed gas manifolds, and auto-protect circuitry preventing sensor overload during out-of-range excursions.
Sample Compatibility & Compliance
The W401X accommodates planar specimens up to Φ100 mm and 3 mm thickness—including monolayer polymers (e.g., LDPE, PP), coextruded structures, metallized foils, ceramic substrates, rubber elastomers, and rigid thermoplastics. Optional fixtures enable quantitative WVTR assessment of 3D containers (bottles, pouches, trays) per ASTM F2622 methodology adaptations. All calibration, verification, and routine operation procedures align with GLP and GMP Annex 11 requirements: full audit trail logging (system, method, and run-level), role-based user access (administrator/operator/observer), password-protected parameter modification, and electronic signature support. Instrument validation documentation satisfies FDA 21 CFR Part 11 data integrity criteria and supports IQ/OQ/PQ execution per ISO/IEC 17025 laboratory accreditation frameworks.
Software & Data Management
The integrated GBPI WVTR Control Suite provides real-time visualization of four synchronized parameters: chamber temperature, RH profile, IR-detected vapor concentration, and calculated transmission rate. Curve overlay, zoom, and hide functions facilitate comparative analysis across multiple runs. Test methods—including preconditioning duration, equilibration thresholds, and endpoint logic—are fully customizable and stored with version-controlled metadata. Reports comply with ISO 17025 reporting clauses: automatic inclusion of instrument ID, operator ID, environmental logs, uncertainty estimates (based on NIST-traceable calibrations), and digital signatures. Export formats include PDF/A-2, XLSX, and CSV with timestamped database backups retained for ≥15 years.
Applications
- Pharmaceutical packaging qualification per USP and YBB 00092003—evaluating blister lidding foil, cold-form aluminum, and child-resistant closures.
- Food packaging shelf-life modeling—quantifying moisture ingress into retort pouches, snack bags, and vacuum-sealed trays.
- Flexible electronics encapsulation validation—measuring WVTR through thin-film barriers used in OLED lighting panels and flexible photovoltaic backsheets.
- Medical transdermal patch development—assessing hydration-dependent drug release kinetics via controlled moisture flux simulation.
- Academic and industrial R&D—supporting structure-property studies of nanocomposite films, biodegradable PLA blends, and graphene-enhanced barrier coatings.
FAQ
What carrier gas is required for operation?
Ultra-high-purity nitrogen (≥99.999%) is mandatory; compressed air or other gases introduce uncontrolled humidity and CO₂ interference, invalidating measurements.
Can the instrument measure both flat films and rigid containers?
Yes—standard configuration supports planar samples; container testing requires optional fixture kits (e.g., bottle cradle, pouch clamp) calibrated per ASTM F2622-derived protocols.
Is third-party certification available for this instrument?
GBPI provides factory calibration certificates traceable to CNAS-accredited laboratories; users may engage ISO/IEC 17025-accredited service providers for on-site verification and uncertainty budgeting.
How is data integrity ensured during long-duration tests (e.g., 7-day WVTR)?
The ARM controller maintains uninterrupted sampling at 10-second intervals; all raw sensor outputs, environmental logs, and calculation intermediates are written to non-volatile memory with cyclic redundancy check (CRC) validation.
Does the software support multi-user environments in regulated labs?
Yes—role-based permissions, forced re-authentication after idle timeout, and immutable audit trails meet FDA 21 CFR Part 11 and EU Annex 11 requirements for computerized systems in GxP environments.
