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Cospheric offers a large selection of spheres, microspheres and nanospheres, which can be selected based on the desired material properties (glass, polymer, silica, metal, metal-coated), by particle diameter (nanometers to millimeters), by density of the microspheres, by color of the particle (large variety of bright colors are available) or specific functionalities of the particle (fluorescent, phosphorescent, conductive, paramagnetic, neutrally-buoyant, density marker beads, and more).

We offer only the most precise, highest-quality microspheres available on the market. We characterize each product we offer by measuring density and particle size distribution of a statistically significant sample of particles. NIST traceability of microsphere size and density is available by purchasing a NIST-Traceable Microsphere Certificate of Analysis.

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By Material
NIST-traceable microspheres manufactured out of glass, polyethylene, PMMA, cellulose acetate, stainless steel, silica, zirconium and other materials. Metal, fluoro, and silane coatings on solid and hollow glass microspheres. Monodisperse and polydisperse grades of microparticles.
Diameter or particle size of microspheres, as well as particle size distribution, is a critical factor when selecting microspheres for a particular application. Microspheres with diameters from nanometers to millimeters are offered in a variety of grades from bulk options to highly monodisperse spacer grade spheres.
Microsphere density is a critical parameter when selecting microparticles for a specific application. Do the spheres need to be neutrally-buoyant in the fluid for flow visualization or PIV applications? Do they need to float or sink? Is a set of density marker beads needed for density gradients?
Microspheres in a rainbow of bright colors, uniform, consistent, highly spherical properties. The colorant is fully embedded into the microsphere. It will not fade over time or leach out into the solution. Custom color microspheres on request.
Micropspheres with specific properties, such as conductive, fluorescent, phosphorescent, paramagnetic, photocatalytic, retroreflective are offered in a variety of colors, sizes and densities. Density marker beads and janus particles. PIV tracer particles and bond line spacers.
Metal-coated solid and hollow glass and polymer microspheres, including silver, gold, aluminum, nickel coatings. Other coatings such as fluorochemical, silane and TiO2. Custom coatings and partially coated spheres (janus particles) on request.

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Products 1-50 of 129
Barium Sulfate White Polyethylene Polymer Microspheres<br>MRI or X-Ray Medical Applications - Density of 1.00g/cc
Product ID: BSPMS-1.00
Barium Sulfate White Polyethylene Polymer Microspheres - MRI or X-Ray Medical Applications - 1.00g/cc [more info...]
Price: $125.00-$248.50


Barium Sulfate White Polyethylene Polymer Microspheres - Particles for MRI or X-Ray Medical Applications - Density of 1.5g/cc
Product ID: BSPMS-1.5
Barium Sulfate White Polyethylene Polymer Microspheres - MRI or X-Ray Medical Applications - 1.5g/cc [more info...]
Price: $148.50-$248.50


Barium Titanate Solid Glass Microspheres 30-100 micron and 0.3-1mm Diameter
Product ID: BTGMS-4.49-B
Bulk Grades of Barium Titanate Solid Glass Microspheres - 4.0-4.5g/cc - Sizes: 30-100um and 0.3-1.0mm - Index of Refraction: 1.9 [more info...]
Price: $50.00-$158.00


Barium Titanate Solid Glass Microspheres and Spheres
Product ID: BTGMS-4.49
Classified Grades of Barium Titanate Solid Glass Microspheres - Density: 4.0-4.5g/cc - Sizes: 5um to 1000um (1mm) Index of Refraction: ~1.9 [more info...]
Price: $99.00-$248.50


Barium Titanate Solid Glass Microspheres and Spheres
Product ID: BTGMS-ND2.2
Classified Grades of Barium Titanate Solid Glass Microspheres
Density: 4.35-4.38g/cc
Sizes: 5um to 85um
Index of Refraction: ~2.2
[more info...]
Price: $99.00-$248.50


Black Cellulose Acetate Polymer Spheres Density -1.3g/cc 2.5mm and 3.00mm<br>Other Sizes and Colors Available by Request
Product ID: CAS-BK-1.3
Black Cellulose Acetate Polymer Spheres Density ~1.3g/cc - Particle Diameter 1.5mm to 3.5mm
Other Sizes and Colors Available by Request
[more info...]
Price: $50.00


Black Paramagnetic Polyethylene Microspheres 10um to 1mm in Diameter<br>Polymer Spherical MicroBeads can be Manipulated with a Magnet
Product ID: BKPMS
Black Paramagnetic Polyethylene Microspheres, Density of 1.1g/cc and 1.2g/cc 10um to 1.4mm in Diameter
Polymer Spherical MicroBeads can be Manipulated with a Magnet
[more info...]
Price: $99.00-$248.50


Blue Cellulose Acetate Polymer Spheres Density -1.3g/cc 2.0mm Other Sizes and Colors Available by Request
Product ID: CAS-BL-1.3
Blue Cellulose Acetate Polymer Spheres Density ~1.3g/cc - Particle Diameter 2.0mm & 2.5mm
Other Sizes and Colors Available by Request
[more info...]
Price: $50.00


Blue Fluorescent Hemispherical Coating on Solid Glass Microspheres 45-53 micron - 100X magnification
Product ID: HCMS-FMB
Fluorescent Blue Hemispherical Coating on Borosilicate, Soda Lime or Barium Titanate Solid Glass Spheres
Color: Bright Blue under daylight and UV illumination (445nm peak emission)
[more info...]
Price: $295.00-$495.00


Blue Polyethylene Microspheres Density of 1.00g/cc <br>Spherical Particles for Flow Visualization and PIV
Product ID: BLPMS-1.00
Blue Polyethylene Microspheres Density of 1.00g/cc
Spherical Blue Particles for Flow Visualization and PIV
[more info...]
Price: $99.00-$248.50


Blue Polyethylene Microspheres Density of 1.00g/cc <br>Spherical Particles for Flow Visualization and PIV
Product ID: BLPMS-1.02
Blue Polyethylene Microspheres Density of 1.02g/cc
Spherical Blue Particles for Flow Visualization and PIV
[more info...]
Price: $125.00


Blue Polyethylene Microspheres Density 1.08g/cc<br>Bright Blue Polymer Spherical MicroBeads
Product ID: BLPMS-1.08
Blue Polyethylene Microspheres Density 1.08g/cc
Bright Blue Polymer Spherical MicroBeads
[more info...]
Price: $99.00-$148.50


Borosilicate Solid Glass Microspheres 2.2g/cc<br>Many Sizes 20micron to 6150mm
Product ID: BSGMS-2.2
Classified Grades of Borosilicate Solid Glass Microspheres 2.2g/cc
>90% spherical and >90% in size range. Particle Sizes Between 20micron and 6150micron.
[more info...]
Price: $125.00-$299.00


Borosilicate Solid Glass Spheres 2.2g/cc<br>Many Sizes 850micron to 6.15mm
Product ID: BSGS-2.2
Classified Grades of Borosilicate Solid Glass Microspheres 2.2g/cc
>90% spherical and >90% in size range. Particle Sizes Between 850micron to 6.15mm
[more info...]
Price: $125.00-$175.00


Fluorescent yellow spheres. Neutrally-buoyant microspheres for flow visualization.
Product ID: UVPMS-BY-1.00
Bright Yellow Polyethylene Microspheres 1.00g/cc - Various Sizes Between 500micron and 0.85mm
Neutrally-buoyant spheres for flow visualization.
[more info...]
Price: FREE


Red Cellulose Acetate Polymer Spheres Density -1.3g/cc - 1.5mm and 3.00mm<br>Other Sizes and Colors Available by Request
Product ID: CAS-1.3
Cellulose Acetate Polymer Spheres Density 1.3g/cc - Particle Diameters 1mm to12mm
Other Sizes and Colors Available by Request
[more info...]
Price: $50.00


Large PMMA Spheres
Product ID: PMMAMS-1.2
Clear Poly(Methyl Methacrylate) PMMA microspheres supplied in dry powder form
>90% in particle size range. Particle sizes between 150 and 750micron.
[more info...]
Price: $197.50


Clear Poly(Methyl Methacrylate) PMMA Microspheres
Product ID: PMPMS-1.2
Clear Poly(Methyl Methacrylate) PMMA microspheres supplied in dry powder form
>90% in particle size range. Particle sizes between 3 and 150micron.
[more info...]
Price: $112.50-$279.50


Large PMMA Spheres
Product ID: PMMAS-1.2
Clear Poly(Methyl Methacrylate) PMMA Spheres supplied in dry powder form
>90% in particle size range.
[more info...]
Price: $55.00


Clear Polyethylene Microspheres 0.96g/cc - Various Sizes 100micron to 1700micron (1.7mm)
Product ID: CPMS-0.96
Clear Polyethylene Microspheres 0.96g/cc - Various Sizes 1micron to 1700micron (1.7mm)
>90% in particle size range and >90% spherical.
[more info...]
Price: $99.00-$248.50


Clear Polyethylene Particles 0.96g/cc - Various Sizes 0.6mm - 2.8mm
Product ID: CPB-0.96
Clear Polyethylene Particles 0.96g/cc - Various Sizes 0.6mm - 2.8mm
Polymer Beads >90% in Particle Size Range >75% Round
[more info...]
Price: $55.00


Gold-Coated Solid Glass Microspheres - High Density - Transparent Slightly Conductive Gold Coating on Glass Particles
Product ID: BTGMS-AU-4.49
Gold-Coated (~20nm coating thickness)
Solid Barium Titanate Glass Microspheres 4.49g/cc
Size range: 30-100um
[more info...]
Price: $279.50


Highly Electrically Conductive Hollow Glass Microspheres
Product ID: M-18-Ni-0.69
Electrically conductive nickel-coated microspheres with density of 0.69g/cc.
Particle Size Range 5-30um.
[more info...]
Price: $85.00


Nickel-plated Hollow Glass Microspheres 5-30um - Metal Coated Glass Beads, Spheres, Microparticles
Product ID: HGMS-Ni
Nickel-plated Hollow Glass Microspheres 5-30um [more info...]
Price: $99.00-$565.00


Conductive Silver Metal Coated Hollow Glass Microspheres - 10-150micron
Product ID: M-60-0.16
Conductive Silver Metal Coated Hollow Glass Microspheres 0.15-0.42g/cc
Various Sizes 10-150micron.
[more info...]
Price: $99.00-$279.50


Conductive Silver Metal Coated Hollow Glass Microspheres - Density 0.49g/cc
Product ID: M-40-0.49
Conductive Silver Metal Coated Hollow Glass Microspheres 0.41-0.72g/cc
Various Sizes 10-90micron
[more info...]
Price: $99.00-$249.00


Highly Electrically Conductive Hollow Glass Microspheres
Product ID: M-18-AG-0.75
Highly electrically conductive silver-coated microspheres with density of 0.75g/cc
Particle Size Range 5-30um. 45dB of EMI shielding at 20% loading.
[more info...]
Price: $99.00-$1,481.00


"Conductospheres™" Conductive Silver Metal Coated Hollow Glass Microspheres
Product ID: HGMS-AG-1.08
Highly electrically conductive microspheres can be used as a filler that is lighter than solid silver.
Add to paints, adhesives and composites to provide electrical conductivity.
[more info...]
Price: $198.50-$248.50


Soda Lime Solid Glass Silver Metal Coated Microspheres<br>Density 2.5g/cc
Product ID: SLGMS-AG-B
Conductive Silver Metal Coated Solid Soda Lime Glass Microspheres - Bulk Sizes between 11 and 110micron.
>80% in particle size range and >85% spherical particles.
[more info...]
Price: $99.00-$148.50


Silver Metal Coated Soda Lime Solid Glass Microspheres<br>Density 2.5g/cc
Product ID: SLGMS-AG
Conductive Silver Metal Coated Solid Soda Lime Glass Microspheres - Sizes between 1 and 106micron.
>90% in particle size range and >85% spherical particles.
[more info...]
Price: $99.00-$248.50


Density Marker Beads for use in Density Gradients
Product ID: DMB
Density Marker Beads for Density Gradients [more info...]
Price: $62.50-$375.00


Fluorescent Blue Polyethylene Polymer Microspheres, Particles, Beads<br>Density 1.13g/cc
Product ID: UVPMS-BB-1.13
Fluorescent Blue Polyethylene Polymer Microspheres - Density 1.13g/cc
Bright Blue UV Fluorescent Polymer Particles, Beads, Spheres
[more info...]
Price: $99.00-$197.50


Fluorescent Green Polyethylene Microspheres<br>Density 1.00g/cc for Flow Visualization and PIV
Product ID: UVPMS-BG-1.00
Fluorescent Green Polyethylene Microspheres Density of 1.00g/cc
Spherical Flourescent Particles for Flow Visualization and PIV
[more info...]
Price: $99.00-$248.50


Fluorescent Green Polyethylene Microspheres<br>Bright Green Polymer Beads Density 1.015g/cc
Product ID: UVPMS-BG-1.015
Fluorescent Green Polyethylene Microspheres Density 1.015g/cc
Bright Green Polymer Beads Diameter 355micron to 500um
[more info...]
Price: $99.00


Fluorescent Green Polyethylene Microspheres<br>Bright Green Polymer Beads Density 1.01g/cc
Product ID: UVPMS-BG-1.01
Fluorescent Green Polyethylene Microspheres Density 1.01g/cc
Bright Green Polymer Spheres Diameter 27micron to 425um
[more info...]
Price: $99.00-$197.50


Fluorescent Green Polyethylene Microspheres<br>Bright Green Polymer Microbeads Density 1.025g/cc
Product ID: UVPMS-BG-1.025
Fluorescent Green Polyethylene Microspheres with Density 1.025g/cc
Bright Green Polymer MicroBeads
[more info...]
Price: $99.00-$248.50


Fluorescent Green Polyethylene Microspheres<br>Bright Green Polymer Beads Density 1.02g/cc
Product ID: UVPMS-BG-1.02
Fluorescent Green Polyethylene Microspheres Density 1.02g/cc
Bright Green Polymer Spheres or Beads
[more info...]
Price: $99.00


Fluorescent Green Polyethylene Microspheres Density 1.035g/cc<br>Bright Green Polymer Spherical Microbeads
Product ID: UVPMS-BG-1.035
Fluorescent Green Polyethylene Microspheres Density 1.035g/cc
Bright Green Polymer Spherical Microbeads
[more info...]
Price: $99.00-$197.50


Fluorescent Orange Polyethylene Microspheres Density 1.00g/cc<br>Spherical Bright Orange MicroBead Polymer Particles for Flow Visualization and PIV
Product ID: UVPMS-BO-1.00
Fluorescent Orange Polyethylene Microspheres Density 1.00g/cc
Spherical Bright Orange MicroBead Polymer Particles for Flow Visualization and PIV
[more info...]
Price: $99.00-$248.50


Fluorescent Orange Polyethylene Microspheres Density 1.015g/cc<br>Bright Orange Polymer Spherical MicroBeads
Product ID: UVPMS-BO-1.015
Fluorescent Orange Polyethylene Microspheres Density 1.015g/cc
Bright Orange Polymer Spherical MicroBeads
[more info...]
Price: $99.00-$197.50


Fluorescent Orange Polyethylene Microspheres Density 1.030g/cc<br>Spherical Polymer Particles Fluorescent in UV Light
Product ID: UVPMS-BO-1.03
Fluorescent Orange Polyethylene Microspheres Density 1.03g/cc
Spherical Polymer Particles Fluorescent in UV Light
[more info...]
Price: $99.00-$197.50


Fluorescent Orange Polyethylene Microspheres Density 1.040g/cc<br>Spherical Polymer Particles Fluorescent in UV Light
Product ID: UVPMS-BO-1.040
Fluorescent Orange Polyethylene Microspheres Density 1.040g/cc
Spherical Polymer Particles Fluorescent in UV Light
[more info...]
Price: $99.00-$125.00


Fluorescent Red Polyethylene Microspheres<br>Density 0.995g/cc<br>Bright Fluorescent Red Particles 605nm Peak.
Product ID: UVPMS-BR-0.995
Fluorescent Red Polyethylene Microspheres Density 0.995g/cc
Bright Fluorescent Red Particles 605nm Peak. Works well with Green Lasers.
[more info...]
Price: $99.00-$248.50


Fluorescent Red Polyethylene Microspheres Density 1.050g/cc<br>Bright Fluorescent Red Particles 605nm Peak.
Product ID: UVPMS-BR-1.050
Fluorescent Red Polyethylene Microspheres Density 1.050g/cc
Bright Fluorescent Red Particles 605nm Peak. Works well with Green Lasers.
[more info...]
Price: $99.00-$197.50


Fluorescent Red Polyethylene Microspheres Density 1.070g/cc<br>Bright Fluorescent Red Particles 605nm Peak.
Product ID: UVPMS-BR-1.070
Fluorescent Red Polyethylene Microspheres Density 1.070g/cc
Bright Fluorescent Red Particles 605nm Peak. Works well with Green Lasers.
[more info...]
Price: $248.50


Fluorescent Red Polyethylene Microspheres Density 1.090g/cc<br>Bright Fluorescent Red Particles 605nm Peak.
Product ID: UVPMS-BR-1.090
Fluorescent Red Polyethylene Microspheres Density 1.090g/cc
Bright Fluorescent Red Particles 605nm Peak. Works well with Green Lasers.
[more info...]
Price: $99.00-$248.50


Fluorescent Red Polyethylene Microspheres Density 1.20g/cc Bright Fluorescent Red Particles 605nm Peak
Product ID: UVPMS-BR-1.20
Fluorescent Red Polyethylene Microspheres 1.20g/cc - Various Sizes 10um to 600um (0.6mm) [more info...]
Price: $99.00-$248.50


Fluorescent Violet Polyethylene Microspheres<br>Density 1.00g/cc for Flow Visualization and PIV
Product ID: UVPMS-BV-1.00
Fluorescent Violet (Purple) Polyethylene Microspheres Density of 1.00g/cc
Spherical Flourescent Particles for Flow Visualization and PIV
[more info...]
Price: $148.50-$248.50


Fluorescent Violet Polyethylene Microspheres<br>Density 1.06g/cc
Product ID: UVPMS-BV-1.06
Fluorescent Violet (Purple) Polyethylene Microspheres Density of 1.06g/cc
Spherical Flourescent Particles
[more info...]
Price: $99.00-$148.50


Fluorescent Yellow Microspheres Density 1.00g/cc for Flow Visualization and PIV<br>Bright Fluorescent Yellow-Green Particles with UV and Visible Illumination
Product ID: UVPMS-BY2-1.00
Fluorescent Yellow Microspheres Density 1.00g/cc for Flow Visualization and PIV
Bright Fluorescent Yellow-Green Particles with UV and Visible Illumination
[more info...]
Price: $99.00-$248.50


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Products 1-50 of 129