| 摘要 |
PURPOSE: To provide a device for measuring gas flux which has high separation performance and wherein the gas flux can be measured with small measuring errors. CONSTITUTION: The device is constituted in a manner that sampling piping 21 is individually provided for each air bag 24, a three-way electromagnetic valve 30 is set on the outlet 21a of the sampling piping, and a gas sampling means 20 for connecting the discharge opening 30a of the three-way electromagnetic valve 30 to the outlet 24b of the air bag is equipped. A gas flux Fg is calculated on the basis of a difference between concentration average values of components of gas▵C, standard deviation of wind velocityσw and an experiment coefficient b.
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