These particle size standards are certified for mean diameter and are traceable to National Institute of Standards and Technology (NIST) standards.
They are available as uniform spheres in a range of discrete sizes from 20nm to 2000μm. The spherical diameters are calibrated with linear dimensions transferred from NIST standard reference materials.
The products can be used for the calibration of electron microscopes, AFMs, light scattering instruments and other particle measuring equipment. Size standards are available in polystyrene, silica or glass.
Glass Size StandardsGlass microspheres can be used in any application that requires a NIST traceable size standard with a narrow size distribution, and where sample conditions may not be suitable for polystyrene spheres.Average lead time: 1 to 199 daysPOA
Average lead time: 1 to 199 days
Silicon Test SpecimenA silicon test specimen made of single crystal silicon of overall dimensions 5 x 5mm and is 0.5mm thick. Special prices valid while stocks last.Average lead time: 1 to 27 daysPOA
Average lead time: 1 to 27 days
Monosized microsphere size standards 1 - 1000umThese highly uniform polystyrene spheres are calibrated by NIST standardised methods which include photon correlation spectroscopy, transmission electron microscopy and light microscopy.Average lead time: 6 to 44 daysPOA
Average lead time: 6 to 44 days- Uniform polymer microspheres 5 - 40umThis series of microspheres has a slightly wider distribution than the monodisperse microsphere size standards.Average lead time: 6 days
POA
Average lead time: 6 days 
Silica Particle Size Standards 0.5 - 1.5umThis series of Silica particle size standards is designed for applications requiring monodisperse inorganic spheres.Average lead time: 13 to 20 daysPOA
Average lead time: 13 to 20 days
Certified Silicon Test SpecimensIndividual silicon test specimens are calibrated to a guaranteed accuracy of better than 1%.Average lead time: 27 daysPOA
Average lead time: 27 days
