Immersion-proof breathers prevent damage to enclosures and instruments
18 September 2007
Lightweight materials used in the manufacture of electronic products often give designers the dilemma of either having to restrict the applications or to increase the strength of the enclosure walls. Heat cause a build-up of pressure within an enclosure, and without adequate venting the lightweight material could fracture. New immersion-proof breathers from Brownell allow an enclosure to “breathe” (transfer air in and out) but will withstand driving rain or even total immersion in water up to five metres. Made from robust and hard wearing plastics, the breathers can pass high flow rates of air which can result from rapid variations in pressure, caused by temperature or altitude changes.
The breathers can be screwed into a threaded boss or mounted through a hole, using a lock nut that is provided. The units can also be supplied with desiccator tubes for removal of moisture vapour.
If a controlled environment within the equipment is required, then a humidity absorber can be fitted in the rear of most immersion breathers. These absorbers are filled with beaded silica gel to prevent humidity damage and condensation.
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