Patent ID: 6073499
Filing Date: 2000-06-13
Classification: G01N,G01V

Abstract:
A portal for collecting substances of interest from a human subject passing therethrough, said portal comprising a plurality of sidewalls spaced from one another sufficiently to define a passage extending therebetween, said sidewalls defining an entry to said passage and an exit therefrom, said entry, said exit and said passage being dimensioned for accommodating passage of the human subject through said portal, a ceiling extending across and connecting top portions of said sidewalls and covering said passage, portions of said ceiling adjacent said passage defining a collector, said collector comprising fan means for collecting air heated by body heat of the human subject and rising upwardly adjacent the human subject as a human thermal plume of heated air at a flow rate on the order of approximately 30-50 liter/sec, said fan means being operative for accommodating the air in the human thermal plume without substantial dilution of air in the human thermal plume by extraneous air.