Patent ID: 6125845
Filing Date: 2000-10-03
Classification: A62B

Abstract:
A process for the quantitative fit-testing of a respirator, including:fitting a respirator having a filter to an individual, so that the respirator in cooperation with the individual's face forms an internal breathing chamber;collecting first and second aerosol samples from outside of the respirator and from the breathing chamber, respectively;segregating elements suspended in the first and second aerosol samples according to a predetermined element characteristic to select only elements that exceed a fractional filtration efficiency threshold with respect to the filter, while providing the aerosol samples as first and second aerosol sample flows at substantially constant sample flow rates, to provide first and second modified samples corresponding to the first and second aerosol samples, respectively; andgenerating first and second aerosol concentration values indicating concentrations of the selected elements in the first modified sample and in the second modified sample, respectively.