A metal detector used to be an entirely analogue instrument, an oscillator whose frequency changed with the inductance of its sense coil when a piece of metal approached. [Łukasz Podkalicki] shows us ...

What To Consider in a Metal Detector Before we talk about how to pick a metal detector, we should quickly explain how they work. Consumer metal detectors have a round head known as the "search coil," ...

Best practice must be to ensure test pieces are placed in the centre of the coil where it is least sensitive to foreign bodies when doing validation for freefall metal detectors, according to ...

If you purchase an independently reviewed product or service through a link on our website, Rolling Stone may receive an affiliate commission. Metal detectors used to be really bulky, heavy machines, ...

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Editor's Note: October 8th, 2025: We've checked to make sure that our recommendations are still available and competitively priced. A new round of metal detector testing is currently under way, so you ...