W812 Water Vapor Permeability Analyzer (Cup Method) WVTR Testing Equipment For Packaging - GBPI

W812 Water Vapor Permeability Analyzer

The W812 Water Vapor Permeability Analyzer utilizes the cup method for precise WVTR (Water Vapor Transmission Rate) testing of packaging materials. This advanced equipment enables thorough analysis of water vapor permeability in various packaging samples.

Test Principle

The analyzer operates on two methods: weight gain or weight loss. In the weight gain method, desiccant is placed in the sample cup, while in the weight loss method, water is used. After sealing the cup with the sample, it is placed in a test box where temperature, humidity, and wind speed are controlled. The difference in humidity drives water vapor to penetrate the sample, causing the sample cup’s mass to increase or decrease. Regular weighing of the cup allows for calculation of water vapor transmission and other performance parameters.

Applications

The W812 Water Vapor Permeability Analyzer is ideal for testing packaging materials in industries where moisture barrier properties are critical, including food packaging, pharmaceutical packaging, and industrial materials.

Test range	Film: 0.05~10,000 g/(m2·24h) Container: 0.0002~30 g/(pkg·24 h)
Test precision	Film: 0.05 g/(m2·24h) Container: 0.0002 g/(pkg·24 h)
Test station	12 Pieces
Balance range	210 g
Balance indexing	0.1 mg
Temperature range	10~50±0.1 ℃
Humidity range	5%～95%，100% RH
Air speed	0.5~2.5 m/s (0.03~0.5 m/s optional)
Sample size	Φ74 mm
Sample thickness	≤3 mm
Test method	Weight gain method, weight loss method
Standard test area	33 cm2
Carrier gas specification	Air compressor
Air pressure	≥0.6 MPa
Connection size	Φ6 mm Polyurethane tube

W812 Water Vapor Permeability Analyzer (Cup Method) WVTR Testing Equipment For Packaging – GBPI