Malvern Instruments
- Manufactures article characterization and rheological instrumentation for particle sizing, rheology, and chemical imaging.
- http://www.malvern.com/

Zeta Potential Instruments, Inc.
- Software and hardware to view and measure 0.2 micron particles in stable or unstable colloidal systems.
- http://www.zeta-reader.com/

NanoSight
- Detection of nanometre and sub-micron particles by optical microscopy
- http://www.nanosight.co.uk/

Particle World Instruments
- Design, modeling, testing, integration, and modification of particle size analyzers, light scattering and dynamic light scattering systems. IE 5 and above only, Netscape need not apply.
- http://members.tripod.com/~vovod/index-pwi.htm

Vladimir Ovod
- Consulting in particle sizing, light scattering systems development, improving particle size analyzers, dynamic light scattering systems, photon crosscorrelation spectroscopy, zeta potential analyzers and phase doppler anemometry
- http://members.tripod.com/~vovod/

Horiba Instruments Ltd
- Particle size distribution analysis from 3nm to 2000 microns.
- http://www.horiba.co.uk/particlesize.htm

Sympatec
- Particle Sizing from 0.01 to 8750 microns
- http://www.sympatec.com/

Retsch Technology GmbH
- Manufacturers of optical measuring systems for particle characterisation.
- http://www.retsch-technology.com/

Ankersmid
- Analysers for particle characterisation from 0.1 to 3600 microns.
- http://www.ankersmid.com/

Hielscher
- Ultrasonic sieving. Particle sizing using ultrasonics.
- http://www.hielscher.com/ultrasonics/sieve_06.htm

CILAS U.S., Inc.
- A manufacturer and distributor of Laser DP Size Analyzers, a range of models covering particle size distributions from 0.04 to 2500 mm.
- http://www.cilasus.com/

Sheffield Testing Labs
- Providers of independent testing and calibration services. mechanical testing, materials testing, corrosion testing and calibration service provided.
- http://www.sheffieldtesting.com/

Brookhaven Instruments Corporation
- Instruments for particle sizing, zeta potential determination and light scattering to university and industrial laboratories worldwide.
- http://www.bic.com/

Petrossoft Research and Production Ltd
- Manufacturer of microprocessor based machine for automatic testing of diamond powder particle strength.
- http://www.petrossoft.ldc.net/

Zeta-Meter
- Zeta-meter instruments measure zeta potential in colloidal suspensions, with industrial, medical, environmental, and pure research applications.
- http://www.zeta-meter.com/

Micromeritics Instrument Corporation
- Provides instruments for evaluation of particle size, surface area, pore size, material density, and chemisorption. Includes online catalog and list of applications.
- http://www.micromeritics.com/

Christison Scientific
- A supplier of particle sizing,particle characterization, sample preparation, mixing, blending and homogenizing instrumentation serving development.
- http://www.christison.com/

Laval Lab
- Particle size analyzer, zeta potential meter, powder blender, laboratory grinder. In French and English
- http://www.lavallab.com/