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NIST-traceable microspheres, particle size standards, polyethylene spheres, glass microspheres, bond-line spacers.Over a thousand NIST-traceable microspheres are available from Cospheric on this site. When selecting the right microspheres for your R&D project or industrial application, the choice of the correct raw material that the microsphere is made out of becomes critical. Desired material properties drive that choice.

Are you looking for microspheres for high temperature applications, with superior solvent resistance or maximum crush strength? Solid glass microspheres are right for you. Glass microspheres come in several different formulations with varying densities. They can also be metal-coated with silver, nickel, aluminum, or gold, among other options. Conductive and retroreflective properties of coated glass microspheres offer an additional advantages. Glass microspheres are also the preferred material as bond line spacer particles.

Are you looking for brightly colored microspheres with fluorescent or phosphorescent properties for flow visualization experiments, tracer particles for particle image velocimetry (PIV) or contamination studies? In that case polyethylene microspheres are your best choice. These spheres are available in a large range of sphere diameters and tight particle size distributions, which makes them ideal for modeling and simulations. Many densities ranging from 0.98g/cc to 1.3g/cc are among standard products, including neutrally-buoyant spheres with density of 1.0g/cc for use in aqueous solutions. Cospheric's density marker beads also fall in controlled density category.

Silica, PMMA, cellulose acetate, stainless steel, zirconia and other materials are available with a range of diameters and coatings.

Calibration grade glass microspheres (monodisperse/spacer grade), precision grade solid glass polished spheres, and cellulose acetate colored beads, are often used as reference spheres and particle size standards due to their exceptionally narrow diameter tolerance.

Browse the website for one-stop reliable source of all kinds of microspheres. If you still need help selecting the right microspheres to fit your needs, please contact a microsphere expert and we will get back to you within 1 business day.

Most orders (both domestic and international) ship the same business day. Quick and efficient on-line check-out with clearly stated prices and stock status enables you to place an on-line order for microspheres 24/7 anywhere in the world.


Products 1-56 of 99
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Microspheres - Polyethylene spherical particles in sizes 1micron (1um) to 1700micron (1.7mm)
Item #: CPMS -
Price: $103.95-$372.75
Item #: CPMS - View

Pure polyethylene polymer microspheres in dry powder form. No solvents, additives, or colorants are used in the manufacturing process. Polyethylene microspheres are hydrophobic and need to be coated... [more info...]

Highly Opaque White Polyethylene Microspheres, Polymer Beads, Particles
Item #: WPMS -
Price: $103.95-$372.75
Item #: WPMS - View

Polyethylene microspheres are hydrophobic and need to be coated with a surfactant prior to suspending in water. We recommend Tween 80 Bio-compatible Surfactant. Several densities available: WPMS -... [more info...]

Microspheres, Spheres, Micro beads - PMMA - Poly(methyl Methacrylate) - Acrylic Spherical Particles
Item #: PMMA -
Price: $112.50-$289.00
Item #: PMMA - View

PMMA polymer is an amorphous, transparent and colorless thermoplastic that is hard and stiff. It has good abrasion and UV resistance and excellent optical clarity. PMMA spheres are soluble in... [more info...]

Polystyrene Microspheres 1.07g/cc - highly spherical thermoplastic biocompatible microparticles
Item #: PSMS -
Price: $261.00
Item #: PSMS - View

The spheres are in their most pure form, with no surface functionalization, coatings or colorants added. Crosslinked polystyrene is inert, chemically stable, and safe for handling. The primary... [more info...]

Bulk Grades of Solid Soda Lime Glass Microspheres 2.5g/cc. Optional Fluorochemical and Silane Coatings.<br>Mean Diameters 3-6um, 8-12um, 35-45um, 65-75um.
Item #: P2000 -
Price: $52.50-$174.00
Item #: P2000 - View

P2011SL: Average diameter between 3 and 6 microns, with a top size of 20 microns. P2015SL: Average diameter between 8 to 12 microns, with a top size of 36 microns. P2050SL: Average diameter between... [more info...]

Black Paramagnetic Polyethylene Microspheres 10um to 1mm in Diameter. Paramagnetic microspheres have the ability to increase their magnetization with an applied magnetic field and decrease their magnetism when the field is removed.
Item #: BKPMS -
Price: $103.95-$372.75
Item #: BKPMS - View

Paramagnetic microspheres have the ability to increase their magnetization with an applied magnetic field and decrease their magnetism when the field is removed. No residual magnetization is... [more info...]

Janus Particles - Black Paramagnetic Microsphere Core with Partial White Coating (Bipolar and Bichromal Particles)
Item #: HCMS-Polymer -
Price: $295.00-$495.00
Item #: HCMS-Polymer - View

Janus particles are microspheres with dual-functionality. We specialize in creating hemispherical coatings on microspheres of any material with diameters greater than 45micron. Custom colors, cores,... [more info...]

Monodisperse Silica Microspheres - Spherical Silica Beads
Item #: SiO2MS -
Price: $157.50-$258.50
Item #: SiO2MS - View

Silica spheres are manufactured using proprietary technologies which allow the essential properties of amorphous silica to be maintained while simultaneously achieving controlled spherical shape and... [more info...]

Spacer Spheres - Monodisperse Solid Soda Lime Microspheres - Calibration Grade
Item #: S-SLGMS -
Price: $131.25-$312.50
Item #: S-SLGMS - View

Bondline spacer grade solid soda lime glass microspheres are available with tight particle size ranges to achieve bondline thickness (gap) from 15um to 219micron. Bondline spacers are supplied as a... [more info...]

UVPMS-BG Fluorescent Spectra (Excitation & Emission curves)
Item #: UVPMS-BG-1.025 -
Price: $103.95-$298.50
Item #: UVPMS-BG-1.025 - View
Fluorescent Green Polyethylene Microspheres<br>Bright Green Polymer Beads Density 1.015g/cc
Item #: UVPMS-BG-1.015 -
Price: $103.95
Item #: UVPMS-BG-1.015 - View

Density: 1.01-1.02g/cc Daylight Color: Fluorescent Green (515nm Peak) Fluorescent Response: Peak emission of 515nm when excited at 414nm Particles in Size Range: > 90% Spherical Particles: >... [more info...]

Fluorescent Green Polyethylene Microspheres<br>Bright Green Polymer Beads Density 1.01g/cc
Item #: UVPMS-BG-1.01 -
Price: $103.95-$215.00
Item #: UVPMS-BG-1.01 - View

Density: 1.00-1.02g/cc Daylight Color: Fluorescent Green (515nm Peak) Fluorescent Response: Peak emission of 515nm when excited at 414nm Particles in Size Range: > 90% Spherical Particles: >... [more info...]

Fluorescent Green Polyethylene Microspheres<br>Bright Green Polymer Beads Density 1.02g/cc
Item #: UVPMS-BG-1.02 -
Price: $103.95
Item #: UVPMS-BG-1.02 - View

Density: 1.015-1.025g/cc Daylight Color: Fluorescent Green (505nm Peak) Fluorescent Response: Peak emission of 515nm when excited at 414nm Particles in Size Range: > 90% Spherical Particles: >... [more info...]

Fluorescent Green Polyethylene Microspheres Density 1.035g/cc<br>Bright Green Polymer Spherical Microbeads
Item #: UVPMS-BG-1.035 -
Price: $103.95-$215.00
Item #: UVPMS-BG-1.035 - View

Density: 1.03-1.04g/cc Daylight Color: Fluorescent Green (515nm Peak) Fluorescent Response: Peak emission of 515nm when excited at 414nm Particles in Size Range: >90% Spherical Particles: >90%... [more info...]

Fluorescent Red Polyethylene Microspheres Density 0.99g/cc Bright Fluorescent Red Particles 605nm Peak
Item #: UVPMS-BR-0.995 -
Price: $103.95-$372.75
Item #: UVPMS-BR-0.995 - View

Density: 0.985g/cc - 1.005g/cc (Designed for Water Suspension)Daylight Color: Fluorescent Red (607nm Peak) Fluorescent Response: Fluorescent Red under 300-550nm wavelengths. Works well with Green... [more info...]

Fluorescent Red Polyethylene Microspheres Density 1.20g/cc Bright Fluorescent Red Particles 605nm Peak
Item #: UVPMS-BR-1.20 -
Price: $103.95-$215.00
Item #: UVPMS-BR-1.20 - View
Fluorescent Red Polyethylene Microspheres Density 1.090g/cc<br>Bright Fluorescent Red Particles 605nm Peak.
Item #: UVPMS-BR-1.090 -
Price: $103.95-$215.00
Item #: UVPMS-BR-1.090 - View
Fluorescent Red Polyethylene Microspheres Density 1.050g/cc<br>Bright Fluorescent Red Particles 605nm Peak.
Item #: UVPMS-BR-1.050 -
Price: $103.95-$215.00
Item #: UVPMS-BR-1.050 - View
Borosilicate Solid Glass Microspheres 2.2g/cc<br>Many Sizes 20micron to 6150mm
Item #: BSGMS -
Price: $131.25-$313.95
Item #: BSGMS - View

Solid borosilicate glass microspheres are available in a large variety of particle size ranges from 10um to 6150um. Microspheres are supplied as a dry powder. [more info...]

300 Series Stainless Steel Microspheres
Item #: SSMMS -
Price: $103.95-$261.00
Item #: SSMMS - View

Particles in Size Range: >90% Sphericity: >90% Density: 7.7-7.9g/cc Vickers Hardness: ~200HV [more info...]

Fluorescent Yellow Microspheres Density 1.00g/cc for Flow Visualization and PIV<br>Bright Fluorescent Yellow-Green Particles with UV and Visible Illumination
Item #: UVPMS-BY2-1.00 -
Price: $103.95-$372.75
Item #: UVPMS-BY2-1.00 - View
Fluorescent Yellow Microspheres Density 1.02g/cc for Flow Visualization and PIV<br>Bright Fluorescent Yellow-Green Particles with UV and Visible Illumination
Item #: UVPMS-BY2-1.02 -
Price: $215.00
Item #: UVPMS-BY2-1.02 - View
Retroreflective Half-Shell Aluminum Coated Solid Glass Microspheres
Item #: P2453BTA -
Price: $103.95-$557.00
Item #: P2453BTA - View

The spheres are offered in dry powder form with the following coating options: Uncoated - no surface treatment Silane Coating (S2) - for improved dispersion in aqueous systems (~76 degree contact... [more info...]

Fluorescent Orange Polyethylene Microspheres Density 1.00g/cc<br>Spherical Bright Orange MicroBead Polymer Particles for Flow Visualization and PIV
Item #: UVPMS-BO-1.00 -
Price: $103.95-$215.00
Item #: UVPMS-BO-1.00 - View
Fluorescent Orange Polyethylene Microspheres Density 1.015g/cc<br>Bright Orange Polymer Spherical MicroBeads
Item #: UVPMS-BO-1.015 -
Price: $103.95-$215.00
Item #: UVPMS-BO-1.015 - View
Fluorescent Orange Polyethylene Microspheres Density 1.030g/cc<br>Spherical Polymer Particles Fluorescent in UV Light
Item #: UVPMS-BO-1.03 -
Price: $103.95-$215.00
Item #: UVPMS-BO-1.03 - View
Hollow Glass Microspheres - Density 0.14g/cc
Item #: HGMS -
Price: $103.95-$215.00
Item #: HGMS - View
Blue Polyethylene Microspheres Density of 1.00g/cc <br>Spherical Particles for Flow Visualization and PIV
Item #: BLPMS-1.00 -
Price: $103.95-$372.75
Item #: BLPMS-1.00 - View
Blue Polyethylene Microspheres Density 1.08g/cc<br>Bright Blue Polymer Spherical MicroBeads
Item #: BLPMS-1.08 -
Price: $103.95-$372.75
Item #: BLPMS-1.08 - View
Barium Titanate Solid Glass Microspheres and Spheres
Item #: BTGMS -
Price: $52.50-$895.00
Item #: BTGMS - View

Barium Titanate glass spheres offer a higher Refractive Index (n) than most other glass formulations. Depending on the grade of material, reflecting index of Barium Titanate glass is between 1.9 to... [more info...]

Aluminum-Coated Solid Barium Titanate Glass Microspheres 4.2g/cc - 30-100um Diameter
Item #: BTGMS-Al -
Price: $131.25
Item #: BTGMS-Al - View

Physical Characteristics: Coating: Fully Aluminum Coated (~500nm thickness) Core: Solid Barium Titanate Glass Spheres Density: ~4.2g/cc Appearance: Grey powder [more info...]

Orange Polyethylene Microspheres Density 1.00g/cc<br>Spherical Opaque Polymer Particles for Flow Visualization and PIV
Item #: ORGPMS-1.00 -
Price: $103.95-$215.00
Item #: ORGPMS-1.00 - View
Red Polyethylene Microspheres Density 0.98g/cc<br>Bright Red Spherical Polymer Microparticles
Item #: REDPMS-0.98 -
Price: $103.95-$298.50
Item #: REDPMS-0.98 - View
Red Polyethylene Microspheres Density 1.070g/cc<br>Bright Red Polymer Spherical Microparticles
Item #: REDPMS-1.070 -
Price: $103.95-$131.25
Item #: REDPMS-1.070 - View
Red Polyethylene Microspheres Denstiy 1.080g/cc<br>Bright Red Polymer Spherical Microbeads
Item #: REDPMS-1.080 -
Price: $103.95
Item #: REDPMS-1.080 - View
Red Polyethylene Microspheres Density 1.065g/cc<br>Bright Red Polymer Spherical Microparticles
Item #: REDPMS-1.065 -
Price: $103.95
Item #: REDPMS-1.065 - View
Yttria Stabilized Zirconia Microspheres and Spheres 6g/cc - 45um to 1600um (1.6mm) yttrium stabilized zirconia powder, spherical powder, microspheres, microbeads, particles, density of 6.0g/cc
Item #: YSZ -
Price: $99.00-$197.50
Item #: YSZ - View

Yttria-stabilized zirconia microspheres and spheres (ZrO2 / Y2O3) are supplied as a dry powder. With operating temperatures up to 1000°C, a melting point of ~2700°C, and density of ~6g/cc, these... [more info...]

Conductive Silver Coated Poly(Methyl Methacrylate) Acrylic Microspheres
Item #: PMMA-AG -
Price: $99.00-$348.50
Item #: PMMA-AG - View

Sphericity varies by Product Code: PMMAMS-AG: These are highly spherical particles. Greater than 95% of particles are spherical. PMPMS-AG: Also highly spherical grade, with occasional minor... [more info...]

Red Luminescent, Ultraviolet Fluorescing Polymer Microspheres 1 - 5micron
Item #: FMR -
Price: $103.95
Item #: FMR - View

Product Features and Benefits: Inert fluorescent polymer, highly cross-linked for use in applications where the avoidance of swelling, bleeding, migration or plateout is desired.Highly Solvent... [more info...]

Fluorescent Polymer Spheres (Green) 1.100g/cc density
Item #: UVPMS-BG-1.100 -
Price: $215.00-$447.75
Item #: UVPMS-BG-1.100 - View
Green Luminescent, Ultraviolet Fluorescing Polymer Microspheres 1 - 5micron in diameter.
Item #: FMG -
Price: $103.95
Item #: FMG - View

Product Features and Benefits: Inert fluorescent polymer, highly cross-linked for use in applications where the avoidance of swelling, bleeding, migration or plateout is desired.Highly Solvent... [more info...]

Fluorescent Violet Polyethylene Microspheres<br>Density 1.00g/cc for Flow Visualization and PIV
Item #: UVPMS-BV-1.00 -
Price: $157.00-$372.75
Item #: UVPMS-BV-1.00 - View
Fluorescent Violet Polyethylene Microspheres<br>Density 1.06g/cc
Item #: UVPMS-BV-1.06 -
Price: $103.95-$131.25
Item #: UVPMS-BV-1.06 - View
Barium Sulfate White Polyethylene Polymer Microspheres - Particles for MRI or X-Ray Medical Applications - Density of 1.5g/cc
Item #: BSPMS -
Price: $157.00-$261.00
Item #: BSPMS - View

White barium sulfate polyethylene microspheres are supplied in dry powder form and are stable in solution. Polyethylene microspheres are hydrophobic and need to be coated with a surfactant prior to... [more info...]