Laboratory Gas Permeability Testing Equipment

Test Principle

The N500A 2.0 Gas Permeability Tester is designed based on the principle of the differential pressure method. Place the prepared sample between the upper and lower chambers. Use a vacuum pump to evacuate the entire gas circuit system, and then add experimental gas at one atmosphere to the upper chamber to create a constant pressure difference between the upper and lower chambers. Under the action of the pressure gradient, the gas permeates from the upper chamber to the lower chamber through the film. The system can calculate the permeation amount of the experimental sample through the pressure change in the lower chamber. See the following diagram for the differential pressure method schematic:.

Standards

Technical Parameters

Features

• Patented core technology for efficient and accurate testing
  • Imported high - precision vacuum sensors with integrated silicon piezoresistive chips and temperature compensation technology. The full - scale drift is only 0.01% reading/℃, enabling continuous full - scale measurement, avoiding pressure jump blind spots during the vacuum pumping process. Constant temperature control reduces thermal drift, and the repeatability is ≤±0.2% FS.
  • Patented automatic pressure difference maintenance technology can automatically maintain the pressure difference on both sides of the sample (the pressure - maintaining difference can be adjusted arbitrarily). It is equipped with a high - precision pressure sensor with a resolution of 0.01 Pa, featuring good stability and low failure rate.
  • The semiconductor cooling plate automatically controls the temperature bidirectionally, with a temperature control accuracy of 0.1℃.
  • Original high - reliability vacuum pump with an ultimate pressure of up to 0.05 Pa, high vacuum pumping efficiency, and low noise.
  • The new pneumatic gas circuit control system. The automatic fixture locks the sample with one key, which is convenient, labor - saving, and has excellent sealing performance.
• Meeting the testing needs of high - throughput, wide - range, and high - applicability
  • Wide testing range, with a low testing limit of 0.01 cm³/(m²·24 h·0.1 MPa), which can meet the testing needs of various high, medium, and low - barrier materials.
  • By installing appropriate accessories, it can test the gas permeation amount of packaging items such as bottles, bags, and bowls. It also supports the permeation performance testing of different gases such as oxygen, carbon dioxide, nitrogen, and air.
• Supporting research on the scientific research permeation process
  • The software contains a permeation module to analyze the gas permeability, gas permeability coefficient, diffusion coefficient, and solubility coefficient of samples.
  • It can perform data fitting at any temperature and fit parameters such as the gas permeability of the tested material at different temperatures.
  • Customizable high - pressure testing is supported, with a pressure testing range within 0~300 kPa, and accurate pressure maintenance can be achieved.
• Excellent appearance, convenient operation, and real - time visual curves
  • The product is designed from the perspectives of ergonomics and technical aesthetics. The exquisite 3D - printed shell has smooth lines, a fashionable and beautiful appearance, and is novel and unique.
  • It is fully automatic, with one - key testing, automatic judgment, and automatic shutdown.
  • It displays five sets of curves in real - time, including permeation amount - time, temperature - time, upper chamber pressure - time, lower chamber pressure - time, and pressure difference change amount - time. The curves support preview and hiding functions.
• Intelligent operating system, globally certified
  • Self - developed intelligent operating system with modular diagrams, flexible setting of testing process parameters, and intuitive and convenient operation.
  • Designed according to the GMP Appendix "Computerized Systems", it has an audit trail function, multi - level user authority settings, and can meet the data traceability requirements of the pharmaceutical industry.
  • Personalized test reports can be set as needed, supporting multiple data output formats, and functions such as electronic signatures and online submission of review reports.
• Professional calibration services for accurate and reliable data
   
  Our company has a "National Standard Substance Grading Certificate" for gas permeability approved and issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, with standard substance numbers (GBW(E) 130541 / GBW(E) 130542). National standard substances are used to calibrate and verify the instrument to ensure the accuracy, universality, and authority of the detection data.

Application