Method and apparatus for the measurement of airborne fibres by t

Details Method and apparatus for the measurement of airborne fibres by t Method and apparatus for the measurement of airborne fibres by t

1988-09-27

1990-04-10

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

G01N 1506

Patent

active

049163256

ABSTRACT:
Apparatus for measuring the quantity of fibres present in a gaseous fluid is based on the use of a nozzle 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. 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.

REFERENCES:
patent: 4166703 (1979-09-01), Kirsch et al.

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