PNNL device pinpoints suspicious liquids: Researcher says monitor can screen belongings of airline passengers.

From: The Spokesman-Review (Spokane, WA) | Date: September 16, 2006 | Copyright information

Byline: Tom Sowa

Sep. 16--Researchers at the Pacific Northwest National Laboratory have developed a monitor they say can detect suspicious liquids, using acoustic wave technology that measures density of substances.

The devices rely on acoustic ultrasound that tracks how fast or slow sound travels within a container. The technology was developed at PNNL several years ago and was first used in a product called the Acoustic Inspection Device, which was deployed by the U.S. Customs Service for use at borders.

A smaller version has been developed by the same PNNL ...

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