Patent ID: 6990846
Filing Date: 2006-01-31
Classification: G01G,G01N

Abstract:
1. A system for monitoring an aerosol including a plurality of particles, each of the particles having a size, comprising: a high flow rate inlet operable to receive a flow that includes the aerosol at an inlet flow rate greater than 20 liters per minute and to remove particles having sizes greater than about 10 um from the flow, a remaining portion of the particles being emitted in the flow, the inlet including a nozzle assembly having an impaction plate to remove the particles from the flow; a first impactor to receive and separate the remaining portion of the particles into a first portion and a second portion, the first portion including particles having sizes less than a minimum particle size, the second portion including particles having sizes at least equal to the minimum particle size; and at least a first sensor to measure a characteristic of the second portion of the particles.