Test principle
Oxygen transmittance tester, using the principle of pressure difference method design, the pre-treated sample is placed between the upper and lower test chamber, tightly sealed, and then the whole system is vacuumized, when reaching a certain vacuum degree, the lower chamber is closed, the high pressure chamber (upper chamber) is filled with certain test gas, and the upper chamber pressure is stabilized, so that the two sides of the sample formed a constant pressure difference. Gas permeates from the high pressure side (upper chamber) to the vacuum side (lower chamber) under the action of differential pressure gradient. The pressure variation of vacuum chamber (lower chamber) is measured accurately, and the barrier parameters of the sample are calculated.
Technical description of oxygen transmittance tester
(1) Product characteristics
Adopt imported high precision vacuum sensor and pressure sensor
The system has the ability of self-detection to avoid the continuation of testing in the fault state
Water bath temperature control, automatic control of temperature rise and fall, temperature control range is wider and more accurate, higher temperature reliability
The patented ultimate zero and sealed piping system uses baseline technology to eliminate systematic errors and provide more accurate test results
Unique sample anti-leakage structure design, more stable and reliable installation sample seal
Precise pressure control and pressure retention function
Embedded system control, using high-quality components to ensure the stability and reliability of the instrument operation
High speed vacuum capacity, reduced vacuum time, more thorough degassing, high test accuracy
Short test time, high efficiency
Whole-process monitoring and automatic recording, the test process can be repeated whole-process
Automatic test, test automatically after setting the test parameters, automatically judge the end of the test and save the test results
(2) Technical parameters
Measuring range: 0.1 ~ 50000cc/㎡
Sample quantity: 3 pieces
Number of sensors: 3
Vacuum resolution: 0.1Pa
Vacuum: < 20Pa
Temperature control range: 15℃ ~ 90℃
Temperature control accuracy: 0.1℃
Test pressure: 0.1MPa ~ 0.2MPa
Air source pressure: 0.1MPa ~ 0.8MPa
Test gas: O₂, N₂, CO₂ or other gas
Carrier gas interface:
Sample thickness: 3mm
Test area: 97mm
Power supply: 220VAC 50Hz
Testing standard
YBB 00082003, GB/T 1038, ASTM D1434, ISO 2556, ISO 15105-1, JIS K7126-A and other relevant standards
Product configuration
Main engine, vacuum pump, vacuum bellows, gas hose, pressure reducing valve, disc sampler, seal grease, computer
Test air supply
