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Test principle
W401L water vapor transmission rate tester adopts the principle of the infrared method. Fix the pre-treated sample in the middle of the test chamber, divide the test chamber into a high-humidity side and a low-humidity side, the humidified nitrogen flows on one side of the film, and the dry nitrogen (carrier gas) flows at a fixed flow rate on the other side, in the presence of a humidity gradient, water vapor will permeate from the high-humidity side to the low-humidity side, and the water vapor that passes through the sample is carried to the infrared sensor by the flowing dry nitrogen, and the water vapor transmission rate (and other parameters) of the sample is obtained by the electrical signal output by the sensor.
Working principle diagram
Standard
ASTM F 1249, BS EN ISO 15106-2, JIS K7129, GB/T 26253, YBB 00092003
Specification
|
Item |
Technical Parameters |
|
Test range |
0.01～200 g/(m2·24h) |
|
Resolution |
0.0001 g/(m2·24h) |
|
Temperature control range |
15～45℃ |
|
Temperature control accuracy |
±0.2℃ |
|
Humidity control range |
(5～90) %RH, 100%RH |
|
Humidity control accuracy |
±2%RH |
|
Permeable area |
50.24 cm2 |
|
Sample size |
Φ100 mm |
|
Sample thickness |
≤3 mm |
|
Sample quantity |
1 piece |
|
Carrier gas |
99.999% Nitrogen (user-provided) |
|
Carrier gas pressure |
≥0.1 MPa |
|
Carrier gas flow |
5~100 mL/min |
|
Dimension |
380*545*315mm |
|
Power |
450 W |
|
Power supply |
AC 220 V, 50 Hz |
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