WPT-304 Water Vapor Permeability Tester

WPT-304 is based on the Gravimetric method, and is applicable to the water vapor transmission rate test of plastic films, composite films, sheets and other materials.

Product Introduction

WPT-304 Water Vapor Permeability Tester is manufactured based on the gravimetric method and is applicable to test the water vapor transmission rate of plastic films, composite films, sheets, and other materials used in packaging, medical and constructive industry.

Product Features

  • Standard periodic weighing method and auto-zeroing function guarantee the accuracy and uniformity of the testing data.
  • Touch interface is more convenient to operate.
  • 4 specimens can be processed independently with individual result in one test automatically.
  • Electric cylinder lifting structure and automatic weighing calibration mode ensure the accuracy of data.
  • Innovative circulating dehumidification system can effectively prevent the formation of humidity gradient and ensure accuracy.
  • High-precise and automatic control system of temperature can be used under different conditions.
  • Dual test modes: water method and desiccant method.
  • Adjustable air velocity enables the appropriate humidity for testing.
  • The data can be stored and outputted in multi-format (including reports in excel and cloud sharing).
  • GMP management of user's three-level authority complies with international standards.
  • The instrument processes statistical analysis of single and group data.
  • Equipped with ISP control online and upgrade function.
  • Specialized communicating software can display in real-time, analyze and store data.

Test Principle

Under a certain test temperature, the constant difference of humidity is generated between two sides of the test specimen. The water vapor permeates through the specimen and is 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.

Test Standards

This test instrument conforms to many national and international standards:

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


Basic Applications

Including plastic films, plastic composite films, paper-plastic composite films, geomembranes, coextruded films, aluminized films, aluminum foils, aluminum foil composite films, breathable water-proof films and many other film materials

Including engineering plastics, rubber, waterproof building materials and thermal insulation materials, e.g. PP, PVC, PVDC and nylon

Paper, Paperboard
Including paper and paper board

Textile and Non-woven
Including textiles and nonwovens

Technical Specifications

Items Specifications
Test Range 0.1 ~ 10,000 g/m2·24h (Standard)
(Customization is available for desiccant method)
Number of Specimen 1 ~ 4 PCS with independent test results
(Customization ≤ 8 PCS)
Accuracy 0.01 g/m2·24h
Resolution 0.0001g
Temperature Range 10°C ~ 55°C (Standard)
Temperature Accuracy ±0.5°C
Humidity Range 10%RH ~ 90%RH (Relative humidity)
Humidity Accuracy ±2%RH
Air Velocity 0.5 ~ 2.5 m/s (Customization is available)
Test Area 33.18 cm2
Sample Thickness ≤ 3 mm (Customization is available)
Sample Size Φ72 mm
Port Size Ф6 mmPU tubing
Instrument Dimension 500 mm (L) × 500 mm (W) × 550 mm (H)
Power Supply AC 220V 50Hz
Net Weight 42 kg


Standard Configurations: Instrument, Professional Software, Test Dishes, Desiccant Device, Automatic Moisture Filter, Communication Cable, Round Sample Cutter, Quantitative Dropper, Gloves.

Optional Parts: Reference Film, Desiccant container,air compressor, 4A molecular sieve.

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.

Please Note: Jinan Saicheng is always dedicated to the innovation and improvement of product performance and function. Therefore, technical specifications are subject to change without further notice. Jinan Saicheng reserves the rights of final interpretation and revision.
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Jinan Saicheng Instrument, focusing on the R&D of packaging material testing instruments, provides you with cost-effective quality control solutions. We accept customization products for customer special need.
WPT-304 Water Vapor Permeability Tester
WPT-304 Water Vapor Permeability Tester

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