| 摘要 |
A method and apparatus is provided for measuring the transmission rate of a substance through a material, such as a packaging film. The transmission rate of the substance during the test can be increased, or decreased, by increasing the pressure, or decreasing the pressure, respectively, at which the test is conducted. Embodiments can use a probe that does not consume the substance. Specific embodiments can utilize flowing gases. Other embodiments do not require any flowing gas during the measurement. |
