Drug/explosive detectors. (Americas' Security Expo Product Showcase).
Ion Track Instruments of Wilmington, Massachusetts, makes drug and
explosive detection instruments that secure facilities and events from
terrorist attack. They are widely used for drug interdiction at ports,
border crossing checkpoints, and postal inspection facilities. Using
patented Ion Trap Mobility Spectrometer technology, a sample is heated
in the desorber to create vapors that are drawn into the detector and
electrically charged by a patented ionization process. Narcotics and
explosives easily pass through a semipermeable membrane, but inorganic
materials and water vapor cannot. Once they pass through the membrane,
the vapors become charged and react with dopant gases, which ensure that
contraband substances are fully ionized. An electrical field propels
ions to the collector electrode at the other end, creating peaks that
are displayed as a Plasmagram. Measuring the "time of flight"
of the ions identifies them.
Booth 424, Circle 744