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Instrumentation and measurement

Instrumentation and measurement

New metal detector finds small objects by how they disrupt Earth’s magnetic field

29 Jan 2020
Magnetic fields
Tiny deviations: the new metal detector looks for minute disturbances in Earth’s magnetic field. (Courtesy: iStock/muffinmaker)
A compact, low-cost and low-power metal detector that can identify the unique magnetic fingerprints

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Sam Jarman is a science writer based in the UK
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