Standard Environmental Specifications for Membrane Switches

Due to the customized nature and the wide variety of membrane switch designs, it can be somewhat challenging to outline a general set of specifications that covers all membrane switches.  We’ve done our best to to listed below some basic environmental specifications.

  • Humidity: 0 to 98%, no condensation
  • Operating Temperature: -28.9°C (-20°F) to +70°C (+158°F)
  • Storage Temperature: -40°C (-40°F) to 70°C (+158°F)
  • Salt Fog: 5% salt solution, 48 hours

It is important to understand the above standard environmental specifications when designing your membrane switch. Environmental factors are a critical aspect of not only the keypad but the end product itself. Many of CSI Keyboards’ customers require environmentally sealed switches and keypads built to last in extreme and harsh environments. CSI Keyboards has over 35 years of experience designing keypads that are completely environmentally sealed and switches that need to meet specific requirements for Water, Temperature, Humidity, Dirt, Dust, Altitude, Impact resistance, Vibration, and Chemical resistance.

Some of our technologies for environmentally sealing keypads include the Seal Frame design, rubber keypad sealing designs, copper flex circuitry, environmentally resistant polyester technology, and other proprietary sealing techniques.  More information can be found in our Environmental Sealing section of the website.

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