IMPROVED APPARATUS AND METHOD FOR DETECTION OF ASBESTOS FIBRES TECHNOLOGY

摘要

A fibre detector assembly (210, 310, 410, 510) comprising: (i) a scattering chamber body; (ii) means for drawing particles through said body chamber in the form of a particle stream, said means being adapted such that the particles tend to travel in single file with the longitudinal axis of particles with elongate shape substantially aligned with the direction of the flow; (iii) means for illuminating the particle stream (212, 312, 412, 413, 512, 513) within the chamber body; (iv) an optical detector (236, 336, 338, 436, 536, 538) adapted to intercept and collect a portion of the light scattered by particles passing through the illuminating beam; (v) data processing means adapted to capture and process the signals from the optical detector; wherein the apparatus further comprises a means for applying a magnetic field (224, 226, 324, 326, 424, 426, 524, 526) across the particle stream, the magnetic field lines of the magnetic field being perpendicular to the direction of the particle stream.