| 摘要 |
A probe for sampling a soil gas comprising a body having a cavity to which is connected an inlet and an outlet, and a gas permeable waterproof membrane wrapped around the body and sealing the cavity. The membrane allows the soil gas to flow across the membrane from the soil to the cavity. A method for measuring soil gas diffusivity comprising the step of circulating in a closed loop a carrier gas substantially at an atmospheric pressure through a diffusion gas sampling probe inserted in the soil and through a sensor used for the measurement of a concentration of at least a component of the soil gas.
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