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| _ Features & Specifications of Membrane Switch |
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FEATURES |
- Control panel with attractive and colourful appearance
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- Moisture, dust and oil resistant
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- Easy to handle and assemble
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TYPES OF MEMBRANE SWITCH |
There are three basic types of membrane switch, each with unique characteristics:
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- Non Tactile (Flat keys)
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- Plastic Tactile (Polydoms)
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- Metal Dome Tactile (Metal domes/discs)
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In this context "tactile" indicates that the switch has "feel": the operator can feel it click in and out of electrical contact.
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STANDARD SPECIFICATIONS |
Current Rating For Each Switch
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Minimum: |
50uA |
Typical rating: |
1mA to 10mA |
Standard maximum |
100mA, but depends on switch life required |
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Maximum: |
100V, depending on circuit design |
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Standard maximum: |
500mW, no-arcing |
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Typically: |
10pF |
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Stand-alone membrane: |
IP54 |
In suitable housing: |
IP68 |
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- Virtually all beverages and food products
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- Most dilute acids and alkalis
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Standard operational range: |
-30℃ - +60℃ |
Maximum possible(storage): |
+90℃ |
Minimum possible (storage): |
-40℃ |
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Shielding can be incorporated. The high volume resistance of the plastic films used in membrane manufacture mitigate against many of the deleterious effects of static charges on individual users.
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The polymeric films are affected by humidity to a very small degree. The graphic layer is usually made of polyester or polycarbonate film. The moisture vapour transmission rate for polyester of 125u thickness is 4g/m sq./24 hours. Polycarbonate transmits water vapour at about seven times this rate.
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Electrical Design Example |
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Dimensional Design Example |
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| membrane switch // membrane keypad // membrane circuit // membrane panel // membrane label // switch control |
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