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Old Feb 12, 2008 | 9:55 am
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Ari
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Originally Posted by caspritz78
It checks the water content of the liquid. The theory behind is that every dangerous liquid explosive has a low water content. So liquids with a high water percentage are harmless. The machine somehow can identify the water percentage. I think it uses some kind of microwaves.
I believe it is ultrasound.
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