General Info

Principle

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 the 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.

Standards

This test instrument conforms to the following standards:
ISO 15105-1, ISO 2556, GB/T1038-2000, ASTM D1434, JIS K7126-1, YBB 00082003

 

Technical Specifications

SpecificationsFilm Test
Test Range0.1~100,000 cm3/m2·24h·0.1MPa (standard volume)
At least 600,000 cm3/m2·24h·0.1MPa (extended volume)
Number of Specimens1
Vacuum Resolution0.1 Pa
Vacuum Degree of Test Chamber<20 Pa
TemperatureRoom temperature~50°C
Accuracy±0.1°C
Specimen SizeΦ97 mm
Test Area38.48 cm2 (Φ70 mm)
Test GasO2, N2 and CO2 (outside of supply scope)
Test Pressure-0.1 MPa~+0.1 MPa (standard)
Gas Supply Pressure0.4 MPa~0.6 MPa
Port SizeΦ6 mm PU Tubing
Instrument Dimension680 mm (L) x 565 mm (W) x 550 mm (H)
Power SupplyAC 220V 50Hz
Net Weight130 kg
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