ISO INTERNATIONAL STANDARD 21501-3 Second edition 2019-11 Determination of particle size distribution - Single particle light interaction methods : Part 3: Light extinction liquid-borne particle counter Détermination de la distribution granulometrique - Methodes d'interaction lumineuse de particules uniques Partie 3: Compteur de particules en suspension dans un liquide par extinction de la lumiere Reference number ISO 21501-3:2019(E) @ IS0 2019 IS0 21501-3:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may below or Iso's member body in the country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved