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2. Metal detector - Wikipedia

   en.wikipedia.org/wiki/Metal_detector

   A metal detector is an instrument that detects the nearby presence of metal. Metal detectors are useful for finding metal objects on the surface, underground, and under water. A metal detector consists of a control box, an adjustable shaft, and a variable-shaped pickup coil. When the coil nears metal, the control box signals its presence with a ...

3. Magnetic anomaly detector - Wikipedia

   en.wikipedia.org/wiki/Magnetic_anomaly_detector

   A magnetic anomaly detector ( MAD) is an instrument used to detect minute variations in the Earth's magnetic field. [ 1] The term refers specifically to magnetometers used by military forces to detect submarines (a mass of ferromagnetic material creates a detectable disturbance in the magnetic field ); military MAD equipment is a descendant of ...

4. Full body scanner - Wikipedia

   en.wikipedia.org/wiki/Full_body_scanner

   A full-body scanner is a device that detects objects on or inside a person's body for security screening purposes, without physically removing clothes or making physical contact. Unlike metal detectors, full-body scanners can detect non-metal objects, which became an increasing concern after various airliner bombing attempts in the 2000s.

5. List of metal detecting finds - Wikipedia

   en.wikipedia.org/wiki/List_of_metal_detecting_finds

   This is a list of historically significant items found by metal detecting method, only excluding magnet fishing finds, since magnet fishing is usually considered a distinctively different and separate hobby from traditional metal detecting.

6. S.Africa's 'construction mafias' are scaring away investors ...

   www.aol.com/news/africas-construction-mafias...

   Powerful and politically-connected "construction mafias" are scaring away investors and holding back infrastructure projects needed to grow South Africa's economy, the country's new public works ...

7. Defect detector - Wikipedia

   en.wikipedia.org/wiki/Defect_detector

   Defect detector. A defect detector is a device used on railroads to detect axle and signal problems in passing trains. The detectors are normally integrated into the tracks and often include sensors to detect several different kinds of problems that could occur.