GPT-301 Gas Permeability Tester

GPT-301 is based on the differential pressure method, and is professionally applicable to the determination of gas transmission rate as well as solubility coefficient, diffusion coefficient and permeability coefficient of plastic films, composite films, high barrier materials, sheeting and aluminum foils.

  1. General Details

    ♦ Gas transmission rate, solubility coefficient, diffusion coefficient and permeability coefficient of the specimen could be obtained at one operation

    ♦ 3 distinct or equivalent specimens could be tested individually with independent test results at one operation

    ♦ Wide range and high precision temperature and humidity control to meet various test conditions

    ♦ The instrument comes with two test modes: proportional mode and Fuzzy Model.

    ♦ Test range could be extended based on user requirements to test the materials with high permeability

    ♦ Test results could be easily obtained even at extreme conditions by data fitting function, which could work at any temperature

    ♦The instrument could be used to test poisonous, inflammable, and explosive gases (customization required)

    ♦ The instrument is controlled by computer and test process is automatic

    ♦ Reference film for fast calibration to ensure accurate and universal test data

    –  Standard RS232 port for convenient data transfer

  2. Principle & Standards

    The pre-conditioned specimen is mounted in the gas diffusion cell as to form a sealed barrier between two chambers. The lower-pressure chamber is firstly evacuated, followed by the evacuation of the entire cell. A flow of gas is thereafter introduced into the evacuated higher-pressure chamber and a constant pressure difference is generated between two chambers. The gas permeates through the specimen from the higher pressure side into the lower side. The gas permeability and other barrier properties of the specimen can be obtained by monitoring the pressure changes in the lower chamber.


    ISO 15105-1、ISO 2556、GB/T 1038-2000、ASTM D1434、JIS K7126-1、YBB00082003

  3. Applications Specifications
    Basic Applications Films Including plastic films, plastic composite films, paper-plastic composite films, coextruded films, aluminized films, aluminum foils, aluminum foil composite films and many others
    Sheeting Including engineering plastics, rubber and building materials, e.g. PP, PVC, and PVDC
    Extended Applications Various Gases Test the permeability of various types of gases, e.g. O2, CO2, N2, Air and He
     Inflammable, Explosive Gases Test the permeability of inflammable and explosive gases
    Biodegradable Films Test gas permeability of various sorts of biodegradable films, e.g. starch-based biodegradable bags


    Materials for Aerospace Usage This instrument can test the Helium permeability of airship gas bags
    Paper and Paper Board Test gas permeability of paper and paper-plastic composite materials, e.g. aluminized paper for cigarette packages, Tetra Pak sheeting, paper bowls for instant noodles and disposable paper cups
    Paint Films Test gas permeability of substrates coated paint films
     Glass Fiber Cloth and Paper Including glass fiber cloth and paper materials, e.g. Teflon paint cloth, Teflon welding cloth and Teflon silicon rubber cloth
    Soft Tube Materials for Cosmetics Including various types of cosmetic tubes, aluminum-plastic tubes and toothpaste tubes
    Rubber Sheeting Including various sorts of rubber sheeting, e.g. car tires
  4. Technical Specifications
    Specification Film Test
    Test Range 0.05 ~ 50,000cm³ /m²·24h·0.1MPa (standard volume)
    At least 500,000 cm³ /m²·24h·0.1MPa (extended volume)
    Number of Specimens 3 (with independent test results)
    Vacuum Resolution 0.1 Pa
    Vacuum Degree of Test Chamber <20 Pa
    Temperature Range 5℃~95℃
    Temperature Accuracy ±0.1℃
    Humidity Range 0%RH, 2%RH ~ 98.5%RH, 100%RH (humidity generator is optional)
    Humidity Accuracy ±1%RH
    Specimen Size Φ97 mm
    Test Gas O2, N2, and CO2 (outside of supply scope)
    Test Pressure -0.1 MPa ~ +0.1 MPa (standard)
    Gas Supply Pressure 0.4 MPa~0.6 MPa
    Port Size Ф6 mm PU Tubing
    Instrument Dimension 760 mm (L) × 575 mm (W) × 450 mm (H)
    Power Supply AC 220V 50Hz
    Net Weight 88 kg


  5. Documents
  6. Related Products