WVTR Water Vapor Permeability Analyzer Water Vapor Transmission Rate Tester W401 2.0 for packaging films Application W401 water vapor permeability analyzer is to test the water vapor transmission rate (WVTR) of films or sheets materials. Applied to: 1) Plastic film, composite film, aluminum foil, aluminized film,etc; 2) Sheet, panel, rubber, ceramics,etc; 3) Packaging containers, such as:glass, bottle, cans, boxes, etc; 4) Expanding application: solar panel, LCD film, medical patch, etc. Widely used in quality inspection organizations, drug control institutions, research institutes, packaging, thin film, food companies, pharmaceutical enterprises, personal care industry, electronics industry and so on. Standard ASTM F1249, BS EN ISO 15106-2