Precision pressure method gas permeability tester based on the principle of differential pressure method of testing, is a professional film samples for gas permeability tester for plastic films, laminated films, high barrier materials, sheet, foil tablets at various temperatures of gas transmission, measured solubility coefficient, diffusion coefficient and permeability coefficient. Main technical features high-precision pressure method gas permeability tester: the simultaneous determination of sample gas permeability, solubility coefficient and diffusion coefficient of the most efficient in the industry six cavity completely independent design, which can be the same or different test six Six sample test chamber into A, B two different accuracy regions can meet the accuracy requirements of different tests, and the B group accuracy up to 0.01 Pa wide range, high precision temperature control to meet the test under various test conditions to provide proportional and fuzzy dual mode test during the test to determine the range can be expanded as needed to meet the requirements of large transmittance test can be performed at any temperature data fitting, easy access to test results under extreme conditions to support toxic gases and flammable gases test (to be restructured) system uses computer-controlled, the entire test process automatically provides quick calibration standard film to ensure the accuracy and versatility of test data with generic data RS232 interface for data transfer precision test pressure method gas permeability tester Principle: The principle of differential pressure method to test the pre-treatment sample is placed between the upper and lower good test chamber, clamped. First, the low-pressure chamber (lower chamber) for vacuum treatment and then the whole system was evacuated; when the required degree of vacuum, closed under test chamber filled with the test gas to a pressure of the high pressure chamber (upper chamber) and to guarantee both sides of the sample to form a constant differential pressure (adjustable); such gases under the influence of pressure gradient from high pressure to low pressure sides penetration through the low-pressure side pressure monitoring process to arrive at the test sample the barrier parameter. Precision pressure method gas permeability tester performance standards: ISO 15105-1, ISO 2556, GB / T 1038-2000, ASTM D1434, JIS K7126-1, YBB00082003 precision pressure method gas permeability tester Specifications: Test range: 0.1 ~ 50,000 cm3 / m2 · 24h · 0.1MPa (A general set of volume) 1.00 ~ 50,000 cm3 / m2 · 24h · 0.1MPa (A group expansion volume) 0.01 ~ 1,000 cm3 / m2 · 24h · 0.1MPa (Group B) Sample Number of pieces: 6 (A, B two groups of three, the data independently) Vacuum Resolution: A group: 0.1 Pa Group B: 0.01 Pa test chamber vacuum degree: <20 Pa Temperature range: 5 ℃ ~ 95 ℃ control Temperature Accuracy: ± 0.1 ℃ Sample size: Φ97 mm by area: 38.48 cm2 test gases: O2, N2, CO2 and other gases (air source user-owned) Test pressure: -0.1 MPa ~ + 0.1 MPa (conventional) gas source pressure: 0.4 MPa ~ 0.6 MPa interface Size: Ф6 mm polyurethane tube Dimensions: 1370mm (L) × 575mm (W) × 450mm (H) Power: AC 220V 50Hz Weight: 160kg precision pressure method gas permeability tester configurations: standard Configuration: Host, temperature controllers, computers, specialized software, samplers, vacuum grease, rapid quantitative filter paper, vacuum pump (import) Option: sampling blades, vacuum grease, vacuum pump oil, rapid quantitative filter paper Note: This machine imported gas source To Ф6 mm polyurethane tube; gas source, distilled water users themselves.