Standardization pertaining to equipment and methods used in characterization or size classification of particulate material, where particles may be considered to include grains, flakes, fibres, droplets, bubbles or pores from the nanometre to the millimetre scale.

Covering the following:
  • Particle and particle ensemble characterization, mainly by determination of physical properties of the particles including, for example, size distribution, particle shape and morphology, weight, density, surface area or porosity, and mobility
  • Particle systems characterization comprises particle-fluid and particle-particle interactions in suspensions, emulsions, aerosols or powders by determining their properties including concentration, electric charge, zeta potential, state of agglomeration, stability and rheology.
  • Test sieves, sieving methods and industrial screens.

Each of the above areas will comprise standardization in the field of laboratory or process environment including terminology, reference materials, guidance for sampling, sample preparation, interpretation of results and uncertainty determination.

Quick links


Published ISO standards *


ISO standards under development *

Participating members
Observing members

* number includes updates

Reference Title Type
ISO/TC 24/SC 4 Particle characterization Subcommittee
ISO/TC 24/SC 8 Test sieves, sieving and industrial screens Subcommittee
Liaison Committees to ISO/TC 24

The committees below can access the documents of ISO/TC 24:

Reference Title ISO/IEC
ISO/TC 27 Coal and coke ISO
ISO/TC 29 Small tools ISO
ISO/TC 33 Refractories ISO
ISO/TC 74 Cement and lime [STANDBY] ISO
ISO/TC 93 Starch (including derivatives and by-products) ISO
ISO/TC 102 Iron ore and direct reduced iron ISO
ISO/TC 119 Powder metallurgy ISO
ISO/TC 134 Fertilizers, soil conditioners and beneficial substances ISO
ISO/TC 229 Nanotechnologies ISO
ISO/TC 256 Pigments, dyestuffs and extenders ISO


Liaison Committees from ISO/TC 24

ISO/TC 24 can access the documents of the committees below:

Reference Title ISO/IEC
ISO/TC 27 Coal and coke ISO
ISO/TC 134 Fertilizers, soil conditioners and beneficial substances ISO
ISO/TC 142 Cleaning equipment for air and other gases ISO


Organizations in liaison (Category A and B)
Acronym Title Category
BITOM Bureau international d'information pour les toiles métalliques A
EUROPERF European Perforators Association A
EC - European Commission European Commission B
WHO World Health Organization B

Date Month Location TC/SC Note
18-21 March 2024 Virtual () ISO/TC 24/SC 4  

* Information definite but meeting not yet formally convened
** Provisional

ISO/TC 24 - Secretariat

DIN [Germany]

DIN Deutsches Institut für Normung e.V.
Am DIN-Platz, Burggrafenstraße 6
D-10787 Berlin

Tel: +49 30 2601-0
Fax: +49 30 26 01 12 31