Immersion Proof Breathers

Immersion Proof Breathers, also called protective vents, are "free breathers" that permit air pressure equalization, but keep out liquid water. Immersion Proof Breathers are used on membrane keyboards and similar pressure sensitive equipment that must operate under rain or water submersion conditions. These immersion proof breathers are manufactured with robust materials and finishes suitable for military and defense applications. Products include: Immersion Breathers; Mini-Immersion Breathers; Immersion Breather/Desiccators; and Plastic Immersion Breathers. AGM also offers a complete line of controlled Breather Valves.

Water Vapor vs. Water

Confusion often arises when discussing Immersion Proof Breathers and their performance when subjected to water vapor and immersion in water. The hydrophobic properties of the membrane prevent the breakthrough of liquid water, but allow the continuous permeation of water vapor.

Other gases with a similar molecular size (~3.1Å or less) to water vapor also permeate through the membrane.

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Characteristics & Applications

FAQs