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It is suitable for the water vapor transmission rate (WVTR) testing of various film materials such as plastic films, paper-plastic composite films, co-extruded films, aluminized films, aluminum foil composite films, glass fiber aluminum foil paper composite films, etc. in fields like food, pharmaceuticals, medical devices, daily chemicals, photovoltaics, electronics, etc. It is also applicable to the WVTR testing of sheet materials such as PP sheets, PVC sheets, PVDC sheets, metal foils, rubber sheets, silicon wafers, and the water vapor transmission performance testing of related materials.

It is based on the testing principle of an infrared moisture sensor. The pre-treated sample is clamped between the test chambers. Nitrogen with a stable relative humidity flows on one side of the film, and dry nitrogen flows on the other side of the film. Due to the presence of a humidity difference, water vapor will diffuse through the film from the high-humidity side to the low-humidity side. On the low-humidity side, the permeated water vapor is carried by the flowing dry nitrogen to the infrared moisture sensor. Different water vapor concentrations generate different optical signals. By analyzing and calculating,an electrical current value is obtained, and then the water vapor transmission rate of the sample is calculated.

1.Equipped with an imported infrared moisture sensor, it can achieve a lower test limit. It is designed in reference to the ASTM F1249 standard. It has an extremely long service life and is non-consumable. It has an over-limit alarm and automatic protection function.

2.Accurate data: Adopting the 360° air circulation constant temperature technology, it has better temperature stability. It is equipped with a high-precision temperature and humidity sensor to monitor and record the changes in temperature and humidity in real time. During the test, it can achieve automatic control of flow rate, temperature and relative humidity with higher precision. It can achieve a higher test repeatability of 0.005 g/(m²·24h).

3.Intelligent operation: Controlled by a 10.1inch touch screen, the operation is more convenient. In the automatic mode, you can input the test temperature and humidity and start the full-automatic test with one click. It has a new test chamber, which is pneumatically pressed and easy to replace.

4.Safe and reliable: Safe operation - It is embedded with the unique high-end electronic system of ourselves, eliminating system failures caused by computer viruses, etc., ensuring the reliability of operation and the security of data storage. Safe control - Equipped with various intelligent sensors such as optical sensors, it has intelligent prompts such as alarms to ensure the safety of operation. Safe performance - The instrument uses components from globally renowned brands, which are stable and reliable.

5.Powerful functions: The professional test mode provides flexible and rich control functions to meet the needs of scientific research. It provides water vapor transmission rate curves, temperature curves and humidity curves. It has an ultra-wide test range to meet the barrier property tests of various materials (customized). It has an ultra-wide temperature range to meet the barrier property tests at different temperatures (customized).