WVTR-W6 Water Vapor Transmission Rate Tester, based on the Gravimetric method, is suitable for the measurement of water vapor transmission rate of various materials such as plastic film, composite film, medical treatment, construction, etc.
WVTR-W6 Water Vapor Transmission Rate Tester, based on the Gravimetric method, provide a wide range and high efficiency water vapor transmission rate testing experience for low, medium and high water vapor barrier materials. It is suitable for the measurement of water vapor transmission rate of various materials such as plastic film, composite film, medical treatment, construction, etc. By testing the water vapor transmission rate, the technical index of the materials could be controlled to meet the requirements for production.
Water Vapor Transmission Rate Tester
-Dual test mode: Desiccant method and Water method
-Equipped with high-precision weighing system, which can improve the system sensitivity and stability
-A new generation of circular structure test chamber design, making the temperature and humidity distribution more uniform
-Wide-range, high-precision, automatic temperature and humidity control, meet various test needs
-Standard air velocity prevents water vapor from condensing on top of test dishes, ensuring a constant humidity difference between the inside and outside of the test dishes
-Self-developed periodically weighing method and auto zero before each weighing guarantee the accuracy and uniformity of the testing data
-Convenient fast-access calibration ports for temperature and humidity calibration.
-Reference film or standard weight for fast and accurate calibration
-Precision mechanical design not only ensures the system's ultra-high precision, but also greatly improves the test efficiency
-Based on the user-friendly Windows operating interface for easy operation
-The test process is recorded automatically, which can realize process data reproduction
-Powerful curve chart analysis function, convenient for comparison test and analysis
-Saves test data in different formats for convenient data transfer
-Powerful functions such as window display, curve overlay analysis, test report customization, original data export, printing, editable with Office software, etc
-Equipped with data traceability, which can realize functions such as multi-level authority management, audit tracking, electronic signatures, etc., which meets the GMP requirements (optional)
-Pubtester also provides professional customization services to meet users' personalized needs in fixtures, software, etc.
-Provide lifetime software free upgrade
Based on gravimetric determination method, 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.
Plastic films, plastic composite films, paper-plastic composite films, coextruded films, aluminum coated films, aluminum foil composite films, glass fiber aluminum foil paper composite films and many other film materials
PP, PVC and PVDC sheeting, metal foils, rubber pads and other sheeting materials
Textiles and Non-woven
Textiles and non-woven fabrics such as diaper, sanitation products, etc.
Paper and Paper Board
Aluminum coated paper for cigarette, paper aluminum plastic composite film and other paper and paper boards
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
Artificial skin has to meet standard requirements for water vapor transmission rate to ensure better breath performance. This instrument can be used to test water vapor permeability of artificial skin
Water vapor permeability of cosmetics
Aseptic wound protecting films, medical plasters and protective clothing materials
Water vapor transmission rate of LCD display and its relevant sheet
Water vapor transmission rate of solar Back-sheets and its relevant sheet
All types of paint films
Test water vapor permeability of various sorts of biodegradable films, e.g. starch-based packaging films
0.1~2,500 g/m2·24h (Desiccant Method)
0.1~10,000 g/m2·24h (Water Method)
Number of Specimens
Single test chamber
(Independent testing results)
1~ 6 (Independent testing results)
0.0001 g (Customizable)
5℃~ 95℃ (Standard)
10%RH～98%RH（Standard is 90%RH）
0.5~2.5 m/s (Customizable)
≤3 mm (Customizable)
Gas Supply Pressure
Φ6 mm PU tubing
220VAC 50Hz / 120VAC 60Hz
560mm (L) × 650mm (W) ×420 mm (H)
Note 1: Refers to the relative humidity on both sides of the film, the humidity in the test chamber is 10%RH-30%RH.
Note 2: Refers to the relative humidity on both sides of the film, the humidity in the test chamber is as follows:
ASTM E96, ASTM D1653, GB 1037, GB/T 16928, YY/T0471, TAPPI T464, ISO 2528, JIS Z0208, YBB 00092003
Standard configuration: Instrument, Professional Software, Test Dishes, Desiccant Tube, Automatic Moisture Filter, Standard Weight, Communication Cable, Round Sample Cutter, Valve Set and Reference Film
Optional configuration: Air Compressor, Desiccant, GMP software
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.