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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. Ground-penetrating radar - Wikipedia

   en.wikipedia.org/wiki/Ground-penetrating_radar

   Ground-penetrating radar ( GPR) is a geophysical method that uses radar pulses to image the subsurface. It is a non-intrusive method of surveying the sub-surface to investigate underground utilities such as concrete, asphalt, metals, pipes, cables or masonry. [ 1] This nondestructive method uses electromagnetic radiation in the microwave band ...

4. Stud finder - Wikipedia

   en.wikipedia.org/wiki/Stud_finder

   1st generation stud finder that utilizes a moving magnet. A stud finder (also stud detector or stud sensor) is a handheld device used with wood buildings to locate framing studs located behind the final walling surface, usually drywall. While there are many different stud finders available, most fall into two main categories: magnetic stud ...

5. Unearth Your Next Hobby With These Expert-Recommended Metal ...

   www.aol.com/best-metal-detectors-uncover-buried...

   Scavenge for gold, coins, and other buried treasure with these metal detectors, including models from Garrett, Nokta, and Minelab. Unearth Your Next Hobby With These Expert-Recommended Metal Detectors

6. Delamination - Wikipedia

   en.wikipedia.org/wiki/Delamination

   Delamination is a mode of failure where a material fractures into layers. A variety of materials, including laminate composites [ 1] and concrete, can fail by delamination. Processing can create layers in materials, such as steel formed by rolling [ 2][ 3] and plastics and metals from 3D printing [ 4][ 5] which can fail from layer separation.

7. Infrared and thermal testing - Wikipedia

   en.wikipedia.org/wiki/Infrared_and_thermal_testing

   Infrared thermography is the science of measuring and mapping surface temperatures. "Infrared thermography, a nondestructive, remote sensing technique, has proved to be an effective, convenient, and economical method of testing concrete. It can detect internal voids, delaminations, and cracks in concrete structures such as bridge decks, highway ...