scanning switch

scanning switch

[′skan·iŋ ‚swich]
(electricity)
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Iris scanning switched off at two UK airports Iris eye-scanning technology has been switched off at Manchester and Birmingham airports, but will continue to be available at Gatwick and Heathrow at least until after the London 2012 Olympic Games.
With electrical transmission of impulses, scanning switches driven by synchronous motors can be employed, one at the dispatching station and the other at the remote station.

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