US 12,222,274 B2
Calibrated aerosol source and related methods
Sylvain Masset, Baltimore, MD (US)
Assigned to HAMILTON ASSOCIATES, INC., Owings Mills, MD (US)
Filed by HAMILTON ASSOCIATES, INC., Owings Mills, MD (US)
Filed on Apr. 19, 2022, as Appl. No. 17/724,294.
Prior Publication US 2023/0332997 A1, Oct. 19, 2023
Int. Cl. G01N 15/10 (2024.01)
CPC G01N 15/1012 (2013.01) [G01N 2015/1016 (2024.01); G01N 2015/1029 (2024.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising the steps of:
(a) providing a calibrated aerosol source for generating at least one test aerosol at a plurality of different aerosol concentrations, the calibrated aerosol source including at least one aerosol generator, a primary mixing chamber and a secondary mixing chamber, a first test port being operably connected to said primary mixing chamber, said first test port being configured such that an instrument or system to be evaluated can be connected to said first test port and a second test port being operably connected to said secondary mixing chamber, said second test port being configured such that an instrument or system to be evaluated can be connected to said second test port; and,
(b) providing the calibrated aerosol source with at least one of the following:
(i) a liquid flow control assembly configured to maintain a liquid level in the at least one aerosol generator at a predetermined height;
(ii) a pressure controller configured for controlling pressure of compressed air supplied to said at least one aerosol generator; and,
(iii) one or more back pressure plates configured for maintaining a positive pressure in one or both of said primary mixing chamber and said secondary mixing chamber.