Air/Vacuum Atmosphere Measurement (Sealing unit)

Measurement of liquids and fine powders without using helium gas

The newly developed “Sealing unit” allows the optical chamber to be kept in vacuum while the sample chamber is under atmospheric pressure (air).

It enables measurement of samples without the need for helium gas for elements from Si and higher atomic numbers.

Measurements can be performed in compliance with ASTM D2622, the standard test method for sulfur analysis in petroleum fuels, without using helium gas. In addition, it is possible to directly measure fine powders that are difficult to pelletize.

The sealing unit can easily be removed so measurements can be performed in the standard atmospheres, where both sample and optical chambers are in helium or vacuum.