Application
WVTR-2501 is based on the weighing method and available for the water vapor permeability test of plastic films, aluminum foil, aluminized films, plastic composite films and many others.

Features
 Weighing method
 Dual weighing modules, patent technology
 18 specimens, continuously test
 One-button test, test automatically in whole process
 Multiple test modes optional
 Temperature and humidity auto control
 Data curves display
 Computer control
 Environment temperature and humidity sensor inside
 Unit based on embedded system,24bit Δ-Σ AD
 Traceable reference film calibration
 Supports DSM system (DSM, lab data management system)

Principles
Test dishes filled with distilled water in a controlled dry atmosphere, a constant humidity difference is generated between two sides of the test specimen, the water vapor permeates through the specimen and into the dry side, water vapor transmission rate and other parameters can be obtained  by measuring the weight changes of the test dish in different time.

Technical indexes
Test range：0.1~19,000 g/m2·24h (standard)
Test accuracy: 0.01 g/m2·24h
Specimen amount: 18 specimens, independent                              
Temperature range:  15C – 65C
Temperature accuracy: ±0.1C
Differential humidity range: Room%RH-97%RH,standard condition 90%RH
Humidity accuracy: ±1%RH
Test area: 28.26 cm2
Specimen size: Φ76 mm
Air velocity:  0.5~2.5 m/s (customization available)
Test chamber volume: 65L
Gas supply: Air
Gas interface: Φ8
Power supply: AC 220V 50Hz
Dimension:  830 mm(L) * 750 mm(W) * 675(H)mm
Net weight:  120kg

Standard
ISO 2528, ASTM E96, ASTM D1653, GB 1037, GB/T 16928, TAPPI T464, DIN 53122-1, JIS Z0208, YBB 00092003

Configuration
Standard configuration: Mainframe, computer, W-CTrans software, test dishes, desiccant tube, pressure regulator, automatic moisture filter, calibration weight, communication cable, sample cutter.
Optional:  Reference film, air compressor and desiccant, sample cutter, DSM system.

Note: Specifications are subject to change without prior notice.