Whether the hydrophilic silica gel (water-attracting) or the hydrophobic adsorbent activated carbon (water-avoiding) is used depends on the objective of the application. If air humidity is to be prevented from entering the system, a silica gel filter is used. On the other hand, if the environment is to be protected from oil aerosols or other pollutants, an activated carbon filter must be used.

Silica gel

Activated Carbon

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