The Water Vapour Permeability Tester is also called the Water Vapor Transmission Rate Tester (WVTR Tester). It measures the water vapor permeability of textiles and garments. It also measures it for coated fabrics, composites, sportswear, and industrial fabrics. This moisture vapor transmission rate tester complies with ASTM E96, GB/T 12704, JIS L1099, etc.

Product Detail

Scope of application:

This machine tests vapor permeability. It can also test the Moisture Vapor Transmission Rate of medical protective clothing.

Test Principle of Water Vapor Transmission Rate Testing.

In a constant temperature and humidity test room, we place the permeable cup. We put the specimen in the cup and sealed it with a rubber gasket. We then place the permeable cup with water and fabric in the sealed room. The room has the specified temperature and humidity. We calculate the permeable amount by measuring the change in the cup’s quality. The cup includes the specimen and moisture absorbent or water. This change occurs within a certain period.

Instrument features:

The refrigeration system adopts the French Taikang refrigeration unit to ensure the stable operation of the whole machine for a long time;

The temperature and humidity sensor imported from Switzerland is adopted to ensure the accuracy of the temperature and humidity in the experimental cabin;

Adopt industrial color touch screen operation, Chinese and English menu display;

The instrument adopts the function of automatic water addition, which is convenient for testing and suitable for long-term testing needs.

The temperature and humidity recorded once per minute can be queried in real time, and can be printed out by connecting to a printer;

The two-layer sample rack is adopted, with 9 test cups per layer, which greatly increases the number of samples in a single test.

Reduce the user's operating costs and improve efficiency;

The sample cups are respectively provided with small doors, which reduce the impact on the test environment after the opening of the door due to the period of sample taking, and shorten the re-stabilization time; After closing the test chamber door, it must be equilibrated again within 3 minutes)

Rotary table sample holder, the test is more uniform than the fixed sample holder.

Applicable standards:

ASTM E96: Standard Test Methods for Water Vapor Transmission of Materials

GB/T 12704: Textiles-Test method for water-vapor transmission of fabrics-Part 1: Desiccant method

JIS L1099

Technical parameter:

Adjustable temperature control accuracy:	20～50℃±0.1℃;
Adjustable humidity Relative humidity:	40～95% ±1% RH
Standard test temperature and humidity:	23℃±0.5℃ 50%±2%RH; 20℃±0.5℃ 65%±2%RH; 38℃±0.5℃ 50%±2%RH; 38℃±0.5℃ 90%±2%RH; 40℃±0.5℃ 50%±2%RH; 40℃±0.5℃ 90%±2%RH;
Wind speed range:	0.02～0.8m/s
Wind speed adjustment method:	manual adjustment through touch screen menu
Moisture permeable cup holder layers:	two layers
Number of permeable cups:	18 in total; (GB)
Moisture permeable cup holder rotation speed:	5rpm/min
Power supply:	AC220V±10%
Power:	4KW
Dimensions:	700×880×1760mm
Net weight:	320Kg

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