In the desert, relative humidity levels may be as low as 5%. In the tropics, 100% is possible. Anything over 40% is generally considered humid. Humidity causes metal to corrode and mold to form. Lower humidity is a problem too, as drops in temperature cause condensation. If that happens inside a transit case or shipping container, the contents can be damaged or completely ruined. Continue reading →

Humidity causes mold and corrosion. Add in temperature changes, condensation can be a problem, too. A desiccant placed in an enclosure adsorbs moisture for a while, but eventually it loses effectiveness and needs replacing. Knowing the level of humidity in a transit case or shipping container, action can be taken before damage occurs. Continue reading →

You can’t prevent moisture from entering an enclosure. It’s in the sealed-in air. It’s in the enclosed materials. It even permeates through the walls and seals of the enclosure. And, when a transit case is equipped with a breather for pressure equalization, air will be drawn in from outside, too. Continue reading →

The greatest strength of the well-constructed transit case is also its greatest weakness. An airtight seal keeps moisture and dust at bay but can lead to a significant pressure differential. If the case becomes pressurized—say you close it at night and leave it in the desert sun all day—the sides might bulge, and the seal could give way. Continue reading →

You’ve packed your delicate items in an airtight case to protect them from moisture and dust. Air can’t get in or out. That’s the purpose. But, what happens when the outside pressure changes?
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