Method for counting particles in a gas
AssigneeMSP Corporation
InventorsBenjamin Y. H. Liu, Thuc M. Dinh, William D. Dick, Aaron M. Collins, Francisco J. Romay
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Abstract
A method for detecting particles in a gas by saturating the gas with vapor and causing the gas to flow through a chamber with walls that are at a temperature different than the temperature of the entering gas creating a gas turbulence within the chamber resulting in the gas becoming super-saturated with vapor and causing said super-saturated vapor to condense on said particles and form droplets, which are then detected and counted by an optical light-scattering detector.
Claims10
A method for creating a super-saturated vapor in a gas containing particles for detection, said method including:
- introducing said gas with vapor at a first temperature into a chamber having a second temperature different from the first temperature of the gas, the introduction of the gas into the chamber creating a gas flow that changes said first temperature of said gas and causes said gas to mix and create a super-saturated vapor for condensation on said particles to form droplets for detection.
A method for creating a super-saturated vapor in a gas containing particles for detection, said method including:
- saturating said gas with vapor at a first temperature;
- introducing said gas into a first chamber, said first chamber being at a second temperature different from the first temperature resulting in the formation of a substantially laminar stream to change said temperature of said gas;
- and introducing said gas through a flow restriction into a second chamber to create turbulence in the second chamber thereby causing said gas to mix forming a super-saturated vapor for condensation on said particles to form droplets;
- and detecting said droplets so formed to detect said particles in said gas.
Dependencies are inferred from the claim text.