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1. (WO2018089631) MICROFABRICATED FRACTIONATOR FOR PARTICULATE MATTER MONITOR

Pub. No.:    WO/2018/089631    International Application No.:    PCT/US2017/060857
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Fri Nov 10 00:59:59 CET 2017
IPC: G01N 15/02
F04B 43/04
G01N 1/22
G01N 15/06
G01N 21/17
Applicants: THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS
PAPROTNY, Igor
FAHIMI, Dorsa
MAHDAVIPOUR, Omid
Inventors: PAPROTNY, Igor
FAHIMI, Dorsa
MAHDAVIPOUR, Omid
Title: MICROFABRICATED FRACTIONATOR FOR PARTICULATE MATTER MONITOR
Abstract:
Microfabricated particulate matter (PM) monitors and fractionators within the PM monitors are provided. A primary channel of a vertical or out-of-plane fractionator receives air samples, comprising particles of varying sizes, from the external environment. The air samples then pass through a plurality of microfluidic channels, wherein inertial forces are applied within the microfluidic channels to separate the particles by size. The fractionator comprises a horizontal air outlet for particles having a size below a threshold size and a vertical air outlet for particles having a size above a threshold size. Thus, the proportion of PM in the air sample is reduced prior to deposition on a PM monitor. A virtual cyclone may also be provided that comprises a bend positioned at a flow path through a primary channel of the vertical microfabricated fractionator.