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AUTO W812 Dual Mode WVTR Tester (Weight Gain & Weight Loss Method)
Product Introduction
Designed and manufactured based on cup-type water vapor transmission test principle, complying with ASTM E96 and GB/T 1037 standards. It provides wide-range and high-efficiency WVTR testing for materials with low, medium and high water vapor barrier properties. It is applicable to test water vapor transmission performance of films, sheets, paper, fabric, non-woven fabrics and related materials used in food, pharmaceutical, medical device and daily chemical industries.
Get QuotationTest Principle
Fill desiccant in sample cup for weight-gain method, or fill pure water for weight-loss method. Seal the cup with test specimen and place the cup into test chamber. Control temperature, humidity and wind speed inside the chamber accurately. The humidity difference between inside and outside the cup drives water vapor to penetrate through the specimen, resulting in weight increase or decrease of sample cup. Weigh the cup at fixed intervals to calculate water vapor transmission rate and other material barrier parameters.
Compliant Test Standards
- Chinese Pharmacopoeia 2025 Edition, 4010 Water Vapor Transmission Test Method for Pharmaceutical Packaging Materials
- ASTM E96, ASTM D1653
- GB/T 1037, GB/T 16928, GB/T 17146, GB/T 12704, GB/T 19082, GB/T 21332
- ISO 2528, TAPPI T464, DIN 53122-1, YBB 0009-2003
Technical Specifications
| Test Range | 0.05~10,000 g/(m²·24h) |
| Resolution | 0.0001 g/(m²·24h) |
| Test Stations | 12 pcs |
| Balance Range | 220 g |
| Balance Division Value | 0.1 mg (0.01 mg optional) |
| Temperature Control Range | 10~50℃, ±0.1℃ |
| Wind Speed | 0.3~2.5 m/s (0.03~0.5 m/s optional) |
| Humidity Control Range | 5～90 %RH |
| Humidity Control Accuracy | ±2%RH |
| Effective Test Area | 33 cm² |
| Specimen Size | Φ74 mm |
| Max Specimen Thickness | ≤3 mm |
| Test Methods | Weight-gain method, Weight-loss method |
| Carrier Gas | Compressed air |
| Air Source Pressure | ≥0.6 MPa |
| Overall Dimension | 830 mm*670 mm*440 mm |
| Air Interface Size | Φ6 mm PU tube |
| Net Weight | 75kg |
| Power Supply | AC 220 V, 50 Hz |
Product Advantages
1. Upgraded Test Chamber & Moisture Cup Design, High-efficiency Multi-mode Test
Adopts newly designed test chamber and circular moisture permeable cups with fully automatic rotating tray to improve weighing efficiency. The inner chamber realizes 360° three-dimensional constant temperature and humidity environment, with ultra-high test resolution up to 0.0001 g/(m²·24h). Equipped with 12 independent test stations, supporting both weight-gain and weight-loss test modes.
2. Precise Control of Temperature, Humidity & Wind Speed
Semiconductor cooling chips realize bidirectional automatic temperature control with accuracy of ±0.1℃. Dual airflow (dry gas & wet gas) humidity control, auto adjustable wind speed and fog-free humidity regulation technology ensure stable humidity at ±2%RH precision, meeting long-term continuous testing demands.
3. Self-diagnosis & Professional Safety Protection
Automatic self-inspection after startup to prevent testing under faulty state. The balance is equipped with heat insulation and moisture-proof technology to ensure stable weighing performance and extend service life.
4. Ergonomic Appearance & Real-time Visual Curves
Artistic appearance design combining ergonomics and technical aesthetics, with exquisite 3D printed shell, smooth lines, stylish and unique look. Fully automatic one-click operation, with automatic judgment and auto-stop functions. Four groups of curves are displayed in real time: WVTR-Time, Temperature-Time, Humidity-Time and Weight-Time, curves support show/hide toggle function.
5. Intelligent Operating System, Global Pharmaceutical Compliance
Self-developed modular graphic intelligent operating system supports flexible parameter setting of test process with intuitive operation. Designed in accordance with GMP Annex for Computerized Systems, equipped with audit trail and multi-level user access control to satisfy data traceability requirements of pharmaceutical industry. Custom test reports can be set as required, supporting multi-format data export, electronic signature and online report submission & review functions.
6. Authorized Calibration, Accurate & Reliable Test Data
Our company holds National Standard Reference Material Certificate for WVTR (GBW(E)130543 / GBW(E)130544) approved and issued by State Administration for Market Regulation of China. The instrument is calibrated and verified with self-developed national standard reference materials to guarantee accurate, universal and authoritative test results.
7. Intelligent Lab IoT Cloud Platform Connection
The tester can connect to IoT cloud platform to realize digital network management. Remote authorized login supports experimental data management and remote fault diagnosis. Customers can independently download instrument manuals, documents and operation videos on the cloud platform.
Application Fields
Films
WVTR test for plastic films (PP/PET/PE/PVC/BOPP/CPP), composite films, paper-plastic laminates, metal composite films, co-extruded films, metallized films and biodegradable packaging films (PLA/PBAT/PBS).
Sheets
Water vapor transmission test for pharmaceutical rigid sheets (PP/PVC/PTP), metal composite sheets, rubber sheets and other sheet materials.
Paper, Paperboard & Composite Materials
WVTR test for coated paper, silicone coated paper, cigarette metallized paper, paper-aluminum-plastic composite sheets and other paper & paperboard materials.
Medical Adhesive Patches
Water vapor permeability test for medical therapeutic plaster patches.
Standard & Optional Configuration
Standard Accessories
Main machine, power cord, communication cable, moisture cups, sample cutter, sealing grease, mouse, calibration weights, 4A molecular sieve desiccant, standard test film
Optional Accessories
Metrological calibration certificate, air compressor
Laboratory Installation Requirements
- No vibration source nearby; test bench must be horizontal and vibration-free
- Standard laboratory environment: ambient temperature 23℃±2℃
- Power supply: stabilized 220V power, one 3-hole switch socket
- Supporting computer: Windows 10 64-bit standard configuration
- Muffle furnace or drying oven (max temperature ≥500℃) for regenerating special desiccant (reusable after drying)
- Desiccator (all samples need dehydration and degassing for 24h before test)
- Primary distilled water, 2L (bottled acceptable)
