Patent ID: 6459079
Filing Date: 2002-10-01
Classification: G01N,H01J

Abstract:
A portable system for sampling the ambient of a selected environment for the presence of predetermined chemical vapors therein, said portable system comprising:a housing in which are disposed: (a) means for obtaining a sample of said selected environment; (b) means for conditioning said obtained sample into a vapor containing known molecules; (c) means for receiving and ionizing said vapor into clusters that define ions of said molecules, said means comprising first and second ion mobility spectrometers, with only one of said ion mobility spectrometers having arranged therewith a reagent source, each of said first and second ion motility spectrometers providing an electrical signal representative of the respective received defined ions of said molecules; (d) means for comparing each of said representative electrical signals of said first and second ion mobility spectrometers against predetermined signals representative of said predetermined chemical vapors and generating an alarm signal if a match exists therebetween; and (e) power source means for supplying electrical power to said vapor receiving means capable of being excited by a battery.