Method and apparatus for the measurement of airborne fibres.

摘要

Apparatus for measuring the quantity of fibres present in a gaseous fluid is based on the use of a nozzle (1) to align the orientation of fibrous particles as they flow into a chamber. A charge is applied to the particles which are then precipitated on to a carrier (4). They are sequentially illuminated in directions normal and transverse to the direction of orientation and from measurements of the relative attenuation of the radiation, an indication of the number of precipitated particles is derived.