Gas permeability test. It is suitable for testing the permeability of O2, CO2, N2 and other gases in plastic films, composite films, high-barrier materials, sheets, metal foils, rubber and other materials. Differential pressure method of gas permeability tester: Place the pre-set sample between the high-pressure chamber and the low-pressure chamber, compress and seal, and then vacuum the high and low-pressure chambers at the same time; after vacuuming for a certain period of time and the vacuum degree drops to the required value, close the low-pressure chamber and move to the high-pressure chamber. Fill the chamber with test gas and adjust the pressure in the high-pressure chamber to maintain a constant pressure difference on both sides of the sample; the gas penetrates from the high-pressure side of the sample to the low-pressure side under the action of the pressure difference; accurately measure the pressure change in the low-pressure chamber and calculate The gas permeability performance parameters of the sample. The gas permeability tester complies with the standard: YBB 00082003, GB/T 1038, ASTM D1434, ISO 2556, ISO 15105-1, JIS K7126-A. Technical Features: Imported high-precision vacuum sensor, pressure sensor, high test accuracy; The thermostatic bath has two-way temperature control, parallel connection, high reliability; Dynamic leakage measurement technology, eliminating sample installation and system background leakage, ultra-high-precision testing; Toxic gas evacuating device to avoid leakage of test gas and less gas consumption; Precise valve and piping parts, thorough sealing, high-speed vacuum, thorough desorption, reducing test errors; Precise pressure control to maintain the pressure difference between the high and low pressure chambers in a wide range; Intelligent automatic: power-on self-test, to avoid the failure state to continue the test; one-key start, fully automatic execution of the test; Data recording: Graphical, full process and full element recording, data will not be lost after power failure. Data security: optional "GMP computerized system" software module, with user management, authority management, data audit trail and other functions. Working environment: indoor. There is no need for a constant temperature and humidity environment (to reduce the cost of use), and the test data is not affected by the environmental temperature and humidity.

Name	Parameter	Name	Parameter
Measuring Range	0.005-10,000 cm3/m2•day•0.1MPa	Measurement Error	0.005 cm3/m2•day•0.1MPa
Number of Samples	3	Number of Vacuum Sensors	1
Vacuum Error	0.1 Pa	Vacuum Range	1333 Pa
Vacuum	<20 Pa	Vacuum Efficiency	Less than 27Pa in 10 minutes
Temperature Range	15 ℃～50 ℃	Temperature Control Error	±0.1℃
Sample Thickness	≤3 mm	Test Area	45.34 cm2 (round)
Correction Method	Standard film	Test Gas	O2, N2, etc. and toxic gases
Test Pressure	0.005～0.15 MPa	Gas Interface	Ø6
Air Pressure	0.5～0.8 MPa	Power Type	AC220V 50Hz
Power	<1500 W	Host size(L×B×H)	680×380×270 mm
Host Weight	60Kg

  Standard configuration: Test host, vacuum pump, test software, vacuum bellows, gas cylinder pressure reducing valve and pipe fittings, sealing grease, 21.5 DELL display, and computer host are built into the test host Optional accessories: container test fixture, humidity control unit. Self-spare parts: test gas and gas cylinders.