C390H Water Vapor Transmittance Testing System Product Sample

C390H Water Vapor Transmittance Testing System——This product is based on the testing principle of infrared moisture analysis sensor, designed and manufactured in accordance with ASTM F1249 and ISO 15106-2 standards, providing a wide range and rate of water vapor transmission detection tests for medium and high water vapor barrier materials. Equipped with three integrated testing chambers, high-precision sensors, and a built-in computer control system, it provides automatic adjustment and control of temperature, humidity, and flow rate, with * testing sensitivity and repeatability. Suitable for testing the water vapor transmission performance of films, sheets, paper, packaging and related materials in the fields of food, medicine, medical devices, daily chemical, photovoltaic electronics, etc.

C390H Water Vapor Transmittance Testing SystemTesting principle:
Clamp the pre processed sample between the testing chambers, and flow nitrogen gas with stable relative humidity on one side of the film, while dry nitrogen gas flows on the other side of the film; Due to the difference in humidity, water vapor will diffuse through the film from the high humidity side to the low humidity side; On the low humidity side, the transmitted water vapor is carried by the flowing dry nitrogen gas to the infrared moisture sensor. Different concentrations of water vapor produce different light signals, and the concentration values are analyzed and calculated to calculate the water vapor transmission rate of the sample. For packaging containers, dry nitrogen gas flows inside the container while the outside of the container is in a high humidity state.