Standard practice for manufacturing emergency or entry phones is to provide them with standard uncoated circuit boards (like the ones in your PC). A few manufacturers, including Viking, spray the circuit boards with a water resistant material such as acrylic conformal coating to protect them.

Some emergency or entry phone applications demand extra protection. Phones that are mounted outside exposed to precipitation, condensation, in salty air near the ocean, exposed to a corrosive atmosphere or vehicle exhaust all need an extra measure of weather and corrosion resistance. See “Does my installation require Enhanced Weather Protection” below.

Our EWP (Enhanced Weather Protection) phones are designed with total reliability in mind. First, we use internally-sealed push button switches, trim pots and DIP switches so you can adjust microphone and speaker volumes and set programming features right at the installation site.

Then we hand seal the connections at the push button switch, microphone, and LED using a special non-corrosive sealant. We use a special microphone boot that acts as a shield against water penetration. A mylar speaker is used with foam rubber mounting gasket. Closed cell foam gasketing is used behind front panels to prevent water penetration.

Finally we "Pot" the entire board in a clear flexible urethane or amber thermoplastic encapsulating material leaving the internally sealed field-adjustable trim pots and DIP switches accessible. Our potting material allows the circuit board and it’s components to expand and contract, while maintaining weather resistance. To protect the tip and ring connections, we include connectors filled with anti-corrosive sealing gel.