Fraudster James McCormick has been jailed for 10 years for selling fake bomb detectors.
McCormick, 57, of Langport, Somerset perpetrated a "callous confidence trick", said the Old Bailey judge.
He is thought to have made £50m from sales of more than 7,000 of the fake devices to countries, including Iraq.
The fraud "promoted a false sense of security" and contributed to death and injury, the judge said.
Police earlier said the ADE-651 devices, modelled on a novelty golf ball finder, are still in use at some checkpoints.
Sentencing McCormick, Judge Richard Hone said: "You are the driving force and sole director behind [the fraud].".
Image copyright Avon and Somerset Police Image caption The device was based on a golf ball finder. »
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