Gas Permeability Tester from Saicheng Instrument

GPT-201B 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, metal foils, rubber,
tires and permeable membranes.
Product Features

Gas transmission rate, solubility coefficient, diffusion coefficient, and
permeability coefficient of the specimen could be obtained at one operation
High precision and wide range of temperature and humidity control to meet
different test conditions
The instrument comes with three test modes: proportional mode, standard
mode and time mode
Test range could be extended based on user requirements to test 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)
Pneumatic sample clamp system assured the reliability of the test and makes
the work high efficient.
The instrument is controlled by the PLC control system and test process is
automatic
Reference film for fast calibration to ensure accurate and universal test
data
GMP three-level authority management
Embedded microcomputer for test result printing.
Professional software support real-time data display, data analysis and
storage
Standard USB port for convenient data transfer

Test 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 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.

Test Standards

This test instrument conforms to many national and international standards:

ISO 15105-1, ISO 2556, ASTM D1434, JIS K7126-1, GB/T 1038-2000, YBB 00082003

Minimum Order: 1 sets

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