One test chamber water vapor permeability analyzer using weight reduction method is to test the water vapor transmission rate (WVTR) of films or sheets materials.

Infrared method water vapor transmission rate tester W405L is a high-end precision packaging material testing instrument, newly developed and upgraded by GBPI Research and Development Team based on ASTM, GB standard requirements and market demand. It is used to test the water vapor transmission rate of samples under set temperature and humidity conditions. It is suitable for the water vapor transmission rate performance test of films, sheets, papers, packages and various materials in the fields of food, medicine, medical equipment, daily chemistry, photovoltaic electronics, etc.