W401 2.0 water vapor transmission rate tester is designed and manufactured according to GB/T 26253 and ASTM F1249 standards, based on the testing principle of infrared method, it provides wide range and high efficiency water vapor transmission rate test for high, medium and low barrier materials is suitable for water vapor transmission performance testing of films, sheets, paper, packaging and other related materials in the fields of food, medicine, medical equipment, daily chemistry, photovoltaic electronics, etc. It is an ideal configuration instrument for off-line or on-line testing of the barrier properties of packaging materials for production units in the packaging industr