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Surface Acoustic Wave (SAW)
Touchscreens are high clarity, drift free
SAW touch screen technology is suggested for use in
ATMs, Amusement Parks, Banking and Financial Applications,
Gaming Environments, Industrial Control Rooms and KIOSK. SAW
touch cannot be used within NEMA environments, as the
technology cannot be gasket sealed. It has excellent durability
that allows it to continue working if scratched since the
overlay for the touch sensor is a solid glass display. The
disadvantage to this glass overlay is that is breakable and
won't work in washdown conditions. The waves are spread across
the screen by bouncing off reflector arrays along the edges
of the overlay and are detected by two "receivers".
The acoustic wave weakens when the user touches the glass
with their finger, gloved hand or soft stylus. The coordinates
are then determined by the controller circuitry that measures
the time at which the amplitude declines. It is the only technology
that can produce a Z-coordinate axis response. SAW technology
offers drift-free stable performance that is always precise.
SAW offers superior image clarity, resolution and high light
transmission.
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