Abstract: Indirect-drive targets is a capsule encased in a cylindrical Au hohlraum with two laser entrance at opposite ends. The capsule is composed of gas fuel, glass shell and CH ablator. There is no way to measure the amount of gas fuel in the capsule after coating the CH layer. This paper focuses on the difference between the hollow glass microsphere general properties and the individual. Preliminary experiments have been performed to determine the statistical distribution of the hollow glass microsphere diameter, wall thickness and permeability based on the experiment data. The permeability differs although the diameter and wall thickness are the same. In order to measure the inner gas amount the permeability should keep homologenous or similar by taking any sample for measurement. A method is