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Sensitive equipment such as optics and electronics can be damaged by humidity and condensation. Placing moisture-sensitive equipment inside a sealed enclosure reduces the risk of damage, but temperature and pressure variations can be problematic for a sealed enclosure if it does not have a pressure-relief mechanism.

Spring-actuated valves provide adequate pressure relief for enclosures, but tend to be large and expensive.

Membrane vents are small and inexpensive, but don't keep moisture out.

AGM’s new Thumbtack Valves, in combination with desiccants, provide both pressure relief and excellent long-term moisture protection.

Thumbtack Valves are also small and inexpensive.

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