john smith wrote:
: Any touch screen that is used for any length of time will have the touch
: membrane worn through. The combination of dirt, pressure and contant
: touching of the most often used screen position will lead to failure.

My 20ish year old Tek 1240 logic analyzer has a touch screen that uses
crossed beams of IR light. It will never wear out. The resistive or
acoustic touch screens will eventually die.
--
Aaron C.