Fluids, semi-solids, and powders stored in vented tanks or drums can become contaminated by moisture or other materials in the processing area. Using a reservoir breather can prevent this contamination.

Desitech reservoir breathers come prefilled with molecular sieve and a mix of orange indicating silica gel, which turns green when saturated. They are equipped with two-way relief valves that stay closed until a pressure difference occurs, significantly extending the lifespan of the desiccant.