By studying various test methods of water vapor transmission rate, Labthink manufactures many water vapor permeability testers based on ASTM E96/GB 1037 (gravimetric method), ISO 15106-2/ASTM F1249 (infrared sensor method), ISO15106-3 (electrolytic sensor method) and ISO15106-1/ASTME398 (humidity sensor method). Labthink has the most complete product line of water vapor permeability testers in packaging industry worldwide.
Water vapor permeability is a measure of the passage of water vapor through a membrane. It is the rate of water vapor transmission per unit area per unit of vapor pressure differential under test conditions.
It is also known as water vapor transmission rate (WVTR) or moisture vapor transmission rate (MVTR).
C390M, also Water Vapor Permeation Analyzer, is based on infrared sensor method and conforms to the requirements of ISO 15106-2/ASTM F1249 to measure wvtr of packaging materials.
Based on infrared sensor method, C301 is suitable for water vapor permeability test of barrier materials. C301 is featured with one chamber, high precise and wide range.