Immersion Proof Breathers are designed for pressure-sensitive equipment that operates under harsh environmental conditions such as; altitude changes, temperature cycling, sandy/dusty places, and even water immersion. They are made of robust and durable material, and can prevent distortion or damages caused by the conditions mentioned above. Immersion Proof Breathers are also made for easy installation where they can be mounted through a hole using the supplied lock nut or screwed into a threaded boss. Incorporating a humidity adsorber into the rear of the Immersion Proof Breather can also protect the equipment from humidity damage and condensation. They can prevent the intrusion of liquid water and equalise pressure in the equipment simultaneously.