Patent ID: 8714034

Claim:
An apparatus for measuring CO 2 flux emanating from a subsurface source thereof, comprising: a hollow container having a first opening exposed to ambient air and an opposing second opening exposed to CO 2 emanating from said subsurface source, a first chamber, and a second chamber in gaseous communication with the first chamber the first chamber being in gaseous communication with the first opening of said hollow container, and the second chamber being in gaseous communication with the second opening of said hollow container; a first CO 2 absorbing material disposed in the first chamber and adapted to permit ambient air to flow therethrough; and a second CO 2 absorbing material disposed in the second chamber and adapted to permit gases including CO 2 emanating from said subsurface source to flow therethrough; whereby said first CO 2 absorbing material prevents CO 2 from the ambient air from reaching said second CO 2 absorbing material.