WF-36S Dressing Water Vapor Transmission Rate Tester

Model: WF-36S
Test range: 0.1~10,000 g/m2·24h (water method)
Resolution of WVTR: 0.01 g/m2·24h
Payment Terms: TT , LC , Others

Brief Introduction 

WF-36S Dressing Water Vapor Transmission Rate Tester is based on the cup method, and is professionally applicable to the water vapor transmission rate test of medical tapes, surgical films, wounds, silicate dressings, silver ion dressings, hydrogels, wound care materials, PU films and other contact wound dressings, non-woven fabrics, cloth and other fabric materials, masks, wet wipes , Diapers, sanitary napkins and other daily necessities.

Technical Features

Professional Design

- The first to launch a water vapor transmission rate tester for dressings and fabrics

- The 36-station design meets the needs of the industry with a large amount of testing

- Quick test, compared with manual test, the test process is more time-saving

- The shape of the vapor-permeable cup can be customized according to requirements, which fully meets the standard test requirements

- Equipped with high-resolution 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

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

- Standard air velocity to prevent the humidity difference spread which ensures the accuracy of the test

- 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 film or 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 Contact Wound Dressing Various medical tapes, surgical films, wound dressings, silicate dressings, silver ion dressings, hydrogels, wound care materials, PU films
Textiles and Nonwovens Textiles and non-woven materials
Daily Necessities Various facial masks, wet wipes, diapers, sanitary napkins
Extended Applications Inverted Cup Method Mount film or sheeting in test dish, cover upper surface of specimen with distilled water, and make the lower side in certain humidity. Generate a constant humidity difference between two sides; water vapor permeates through specimen and measure weight changes in different time to obtain the water vapor transmission rate.NOTE: inverted cups are required

Technical Specifications

Test Range
0.110,000 g/m2·24h
Number of Specimens
136 (Data are independent)
Resolution of WVTR
0.01 g/m2·24h
Resolution of Balance
0.0001 g (Customizable)
Test Temperature
5 °C ~ 95 °C (standard)
Temperature Accuracy
±0.1℃ (standard)
Test Humidity
10%RH ~ 98%RH ±2%RH (Standard 90%RH)
Humidity Accuracy
Air Velocity
0.52.5 m/s (customization is available)
Specimen Thickness
≤3 mm (customization is available)
Test Area
33 cm2 x 36
Specimen Size
Φ74 mm
Gas Supply
Gas Supply Pressure
0.6 MPa
Port Size
Φ6 mm PU tubing
Power Supply
220VAC 50Hz / 120VAC 60Hz


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


Standard Configuration Instrument, Professional Software, Test Dishes, Desiccant Tube, Automatic Moisture Filter, Standard Weight, Round Sample Cutter, Communication Cable and Valve Set
Optional Parts Reference Film, Air compressor and Desiccant

Note: 1.The gas supply port of the instrument is Φ6 mm PU Tubing;

        2. Customers will need to prepare for gas supply and distilled water.

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