The US Customs Service is testing a handheld detector designed to catch
smugglers. The detector can distinguish different metals and see inside sealed
containers. An eddy current sensor measures the flow of electrical currents
through a metal and from the rate of flow it can identify the metal. A second
sensor transmits ultrasound and by timing the echoes works out the distribution
of objects inside a container.
More from 51¶¯Âþ
Explore the latest news, articles and features
Popular articles
Trending 51¶¯Âþ articles
1
Mathematicians stunned by AI's biggest breakthrough in mathematics yet
2
Photos reveal unexpected details from the world's first atomic test
3
The Selfish Gene at 50: Why Dawkins’s evolution classic still holds up
4
We may finally know why dinosaurs like T. rex evolved tiny arms
5
How I used psychology to come back from the worst year of my life
6
The distant world that is our best hope of finding alien life
7
The ‘doomsday’ glacier’s giant ice shelf is about to break away
8
Epic dreaming is leaving people exhausted and distressed
9
Extreme heat hampers children’s early learning
10
CAR T-cell therapy bolstered by stiffening up cancer cells first
