The Sniffex (later SniffexPlus and HEDD1) is (at least according to its manufacturer) a bomb-detection device invented by a Bulgarian engineer. It looks suspiciously like a glorified dowsing rod. It also doesn't work as a bomb-detector, though it may be somewhat effective in enriching the people who sell it to unsuspecting clients. It was tested by the US Navy (the Naval Explosive Ordnance Disposal Technology Division) in 2005 who found out that "The SNIFFEX handheld explosives detector does not work."
 See also
- The Sniffex European website
- Sniffex explosive detector test & review, Anaheim, California, 26-27 April 2006 (has videos)
- Questions About Sniffex, ADE651, GT200, H3 Tec, HEDD1, AL-6D and Other Explosive Detectors, a single-issue blog
- UK government promoted useless 'bomb detectors', BBC Newsnight (contains video; mentions also ADE651), 27 January 2011