WVTR-W6A Water Vapor Permeability Tester for Building Materials

Model: WVTR-W6A
Test range: 00001g~210 or 0.001~3100g(dry method, wet method)
Test Accuracy of WVTR: 0.01 g/m2·24h
Payment Terms: TT , LC , Others

Brief Introduction 

WVTR-W6A Water Vapor Permeability Tester is designed in strict accordance with "Test Method for Water Vapor Transmission Performance of Building Materials and Products". It adopts two test principles, dry and wet, and is suitable for building materials with a water vapor equivalent air layer thickness between 0.1-1500m.

Technical Features

- Supports dry and wet dual test modes

- Satisfy the large-scale and large-thickness test range required for heavy and loose materials such as cement and thermal insulation foam

- Support the customization of 7 kinds of test dishes specified by the standard, so as to meet the test of various materials

- The software supports testing of mass change rate, wet flow density, moisture permeability, moisture permeability resistance, moisture permeability coefficient, moisture resistance factor, and water vapor equivalent air layer thickness.

Advanced Technology

- Equipped with high-resolution Sartorius imported balance, which significantly improves the sensitivity and stability of system testing

- Using a new generation of circular structure test cavity design, making the temperature and humidity distribution in the test cavity more uniform

- Upgraded 360°circulating sweeping wind, user-adjustable wind speed

- Wide range and high-precision of automatic temperature and humidity control to support various combinations of non-standard test conditions

- The wind speed is designed in strict accordance with the standard, and the air flow rate is controlled at 0.02m/s-0.3m/s to ensure a constant humidity difference between the inside and outside of the test dishes

- Independent research and development standard periodically weighing method and auto zero before each weighing guarantee the accuracy and uniformity of the testing data

- Equipped with fast access calibration ports for temperature and humidity which is convenient to the user

- Reference standard weight for fast and accurate calibration

- The precise mechanical structure design not only ensures the ultra-high precision of the system, but also greatly improves the detection efficiency

Advanced Configuration

- 11.6-inch PAD with intelligent data processing functions, providing users with a comfortable and smooth operating experience

- Windows-based operation interface, convenient for user operation and fast learning

- The whole test process is automatically recorded, and the process data can be reproduced

- Powerful curve chart analysis function, convenient for comparison test and analysis

- Support multi-format storage of test data, convenient for data import and export

- Powerful functions such as window display, curve overlay pair analysis, test report customization, raw data export, printing, seamless connection with Office software, etc.

- Equipped with data traceability, which can realize functions such as multi-level authority management, audit trail, electronic signature, etc., which meets the requirements of GMP (optional)

- Provide professional customization services to meet the individual needs of users in fixtures, software, etc.

- Free software upgrade service for life

Test Principle

Under a certain test temperature, a constant humidity difference is generated between two sides of the test specimen. The water vapor permeates through the specimen and into the dry side. By measuring the weight changes of the test dish in different time, water vapor transmission rate and other parameters can be obtained.


Basic Applications Composite Material Various plastic films, plastic composite films, paper-plastic composite films, geomembranes, co-extruded films, aluminized films, aluminum foils, aluminum foil composite films, waterproof and breathable films, etc.
Cement, Mortar Various self-supporting building materials
Thermal Insulation Foam Various loose or granular materials
Film, Aluminum Foil Film and aluminum foil with certain toughness
Adhesives, Sealants High viscosity material
Paint, Waterproof Paint, Varnish When applied, it is liquid, when brushing, it is formed into solid and dried into film

Technical Specifications

Test Range
00001g~210 or 0.001~3100g(dry method, wet method)
Number of Specimens
1~6 (Data are independent)
Test Accuracy of WVTR
0.01 g/m2·24h
Resolution of Balance
0.001 g (Customizable)
Test Temperature
5 °C ~ 95 °C (standard)
Temperature Accuracy
±0.1℃ (standard)
Test Humidity
5%RH ~ 98%RH ±2%RH
(Will change at different temperatures)
Humidity Accuracy
Air Velocity
0.02~0.3 m/s (customization is available)
Specimen Thickness
120 mm (customization is available)
Test Area
33 cm2
Specimen Size
Φ74 mm
Gas Supply
Gas Supply Pressure
0.6 MPa
Port Size
Φ6 mm PU tubing
Power Supply
220VAC 50Hz / 120VAC 60Hz
Instrument Dimension
800 mm (L) x 850 mm (W) x 620 mm (H)
Net Weight
1110 kg


GB 17146-2015, GB 1037, GB/T 16928, ASTM E96, ASTM D1653, YY/T0471, TAPPI T464, ISO 2528, DIN 53122-1, JIS Z0208, YBB 00092003

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