Q&A: What year was metal detectors used as a precautionary measure in secondary level schools?

Question by Speedvan: What year was metal detectors used as a precautionary measure in secondary level schools?



Best answer:
Answer by bob wThe first industrial metal detectors were developed in the 1960s and were used extensively for mining and other industrial applications. A series of aircraft hijackings led the Finnish company Outokumpu to adapt mining metal detectors, still housed in a large cylindrical pipe, to the purpose of screening airline passengers as they walked through.

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