The W303‑2.0 Water Vapor Transmission Rate Tester adopts the classic gravimetric (weight loss) test principle, developed and manufactured in strict accordance with global authoritative standards including GB/T 1037 and ASTM E96. It is professionally applicable to the water vapor permeability testing of films, sheets, paper, packaging containers and various barrier materials across food, pharmaceutical, medical device, daily chemical, photovoltaic electronics and new energy industries.

Featuring a wide testing range and high testing efficiency, the instrument delivers accurate and stable detection of water vapor transmission rate (WVTR) for materials with high, medium and low water vapor barrier properties, serving as a core testing equipment for material barrier performance quality control.

The core testing principle follows the standard weight loss method. Distilled water is added into a dry and clean permeability cup, and the pre‑treated test specimen is used to tightly seal the cup. The sealed permeability cup is then placed in the constant temperature and humidity test chamber.

By precisely controlling the internal temperature and humidity of the chamber, the distilled water in the cup evaporates steadily. Water vapor penetrates through the test specimen at a specific transmission rate, causing a continuous decrease in the total weight of the permeability cup. The instrument's high‑precision sensor continuously monitors and records the weight change of the cup over time.

Professional algorithm calculation is performed based on weight loss data, test time, specimen area and environmental parameters to accurately obtain core indicators including water vapor transmission rate and water vapor permeability coefficient of the specimen.

Supporting visual asset: Gravimetric Test Principle Diagram (optimized image alt: W303‑2.0 gravimetric weight loss water vapor transmission test principle diagram)

The instrument fully complies with domestic and international mainstream industry standards, meeting the certification and testing requirements of global regulatory bodies:

• Chinese Standards: 2025 Version Chinese Pharmacopoeia <4010 Water Vapor Transmission Test Method for Pharmaceutical Packaging Materials>, GB/T 1037, GB/T 16928, YBB 00092003
• ASTM Standards (USA): ASTM E96/E96M, ASTM D1653
• ISO Standards (International): ISO 2528
• European & Japanese Standards: DIN 53122‑1 (Germany), JIS Z0208 (Japan)

• Pharma GMP Compliance: Designed in line with GMP Computerized System Annex, equipped with complete audit trail, multi‑level user authority management and data traceability functions, fully meeting pharmaceutical industry regulatory requirements for data integrity and authenticity.
• Authoritative Calibration Certification: Equipped with national standard reference materials (GBW(E)130543 / GBW(E)130544) approved and certified by the State Administration for Market Regulation of China. Self‑developed standard substances are used for instrument calibration and verification, ensuring test data accuracy, universality and global authority.
• Global Standard Compatibility: Supports simultaneous testing and data output in line with Chinese, American, European and Japanese standards, adapting to global market access and third‑party laboratory testing requirements.
• Standardized Data Output: Supports customizable test reports, multi‑format data export and electronic signature & online review functions, realizing standardized and compliant laboratory data management.

1. Pharmaceutical Industry

Ideal for barrier performance testing of pharmaceutical packaging materials, including solid pharmaceutical hard sheets (PP/PVC/PTP), pharmaceutical packaging films, medical adhesive plasters, ointment tubes, infusion hoses, pharmaceutical plastic trays and polyethylene medicine bottles. It ensures the moisture‑proof performance of pharmaceutical packaging, avoids drug deterioration and guarantees drug shelf‑life stability, fully complying with Chinese Pharmacopoeia and YBB pharmaceutical packaging standards.

2. Food & Daily Chemical Industry

Applicable to water vapor permeability testing of food packaging films, composite films, aluminum‑plastic packaging materials, coated paper, tobacco packaging aluminum‑coated paper and daily chemical packaging sheets. It effectively verifies the moisture barrier capacity of food and daily chemical packaging, prevents product moisture deterioration, and supports quality inspection and formula optimization of packaging materials.

3. New Energy & Photovoltaic Electronics Industry

Widely used in barrier performance testing of photovoltaic backsheets, electronic packaging films, flexible circuit board sheets and new energy battery packaging materials. Precise WVTR detection helps evaluate the moisture resistance of electronic and new energy materials, preventing component oxidation and failure caused by water vapor penetration, and improving the service life and stability of photovoltaic and electronic products.

4. Packaging & Paper Industry

Supports testing of various paperboards, silicone‑coated paper, paper‑plastic composite materials, biodegradable packaging films (PLA/PBAT/PBS) and various flexible/rigid packaging containers. Customizable clamps enable integrated testing of flat materials and finished packaging products (bags, bowls, bottles), covering full‑scenario production and inspection needs.

• Patented High‑precision Testing Technology: Equipped with high‑sensitivity precision weighing sensor, achieving a resolution of 0.0001 g/(m²·24h) with stable and efficient weighing performance. Adopts semiconductor refrigeration bidirectional automatic temperature control technology, with temperature control accuracy up to ±0.1℃ and humidity control accuracy of ±2%RH, ensuring ultra‑stable test environment and accurate data.
• Wide Range & High Throughput: The test range covers 0.1~10000 g/(m²·24h), fully adapting to high, medium and low barrier materials. 3 independent test cavities support simultaneous testing of 3 samples with separate data recording, greatly improving laboratory test efficiency. Optional accessories support finished packaging container testing to expand application scenarios.
• Intelligent Visual Operation System: Ergonomic 3D printed shell with streamlined and fashionable appearance. Fully automatic one‑click test operation with automatic judgment and automatic stop functions. Real‑time display of 4 sets of dynamic curves (transmission rate‑time, temperature‑time, humidity‑time, weight‑time) with preview and hiding functions, realizing visualized whole‑process monitoring.
• Industrial‑grade Intelligent Management: Self‑developed modular intelligent operating system with flexible parameter setting and intuitive operation. Supports multi‑level user authority, audit trail, electronic signature and online report review, meeting GMP and laboratory standardized management requirements.
• IoT Remote Management Platform: Compatible with laboratory intelligent IoT system, supporting remote authorized login, real‑time experimental data management, remote fault diagnosis and equipment operation monitoring. Users can freely download instrument manuals, operation videos and technical documents online.

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