telecommunications industry is subject to rapid fluctuations in ambient temperature, while also being exposed tovarious particles, and is constantly exposed to various climatic conditions such as wind, rain, and sunlight.,for example, when a device such as a tower top antenna with power electronics installed is operating, heat mayaccumulate inside the device housing. This will lead to an increase in pressure, so that the housing sealing strip issubjected to greater stress. In addition,a sudden rainstorm or strong wind may cause a sudden drop in temperaturefollowed by the formation of a vacuum of 200 mbar(3 psi) or more inside the equipment housing,which will alsomake the housing sealing strip bear more stress. If the pressure inside and outside the housing is not balanced,water, moisture, dust and dirt in the external environment will enter the interior of the housing through the sealinggap. This may adversely affect the performance of the communication equipment, resulting in more repair work orgreater repair costs.

Solution: Keep the pressure balance inside and outside the shell through continuous ventilation.SDA waterproof, dustproof and breathable products can extend the service life of telecommunications equipmentthereby reducing maintenance costs, warranty claims and customer dissatisfaction because they can:.O Effective control of differential pressure within the equipment housing.O Prevent condensation from affecting sensitive electronic equipment
. O Reduces Stress on Enclosure Seal
. O Prevent rain,moisture, particles and other contaminants entrained in the wind from entering the housing. O eliminates the need for a “ruggedized” housing, thereby reducing cost and weight