Patent ID: 7235120
Filing Date: 2007-06-26
Classification: B03C,G01N

Abstract:
1. An aerosol monitoring apparatus comprising a unit ( 10 ) arranged, in use, to be carried by a person and to be separate from the respiratory system of the person, the unit including a detachable air inlet ( 22 ) and an air outlet ( 24 ) and power means ( 16 ) arranged, in use, to cause air flow from the inlet to the outlet, the unit further including a replaceable electrostatic filter ( 40 ) mounted in the detachable air inlet through which at least some of the air that passes from the inlet to the outlet is arranged to pass whereby, in use, at least some of any aerosol in the air passing through the electrostatic filter ( 40 ) is retained by the electrostatic filter, the unit ( 10 ) and power means ( 16 ) being arranged in use to control the amount of air being drawn through the filter in order to maintain the air flow rate through the filter substantially constant.