• These uniform microspheres are NIST-traceable by calibration methods such as optical microscopy. Products from 1 to 160µm in diameter are packaged as aqueous suspensions of polystyrene spheres in dropper-tipped bottles. Diameters of 200µm and larger are packaged as dry spheres in screw-capped bottles. These larger particles are composed of polystyrene DVB (divinylbenzene). The spheres have a density of 1.05g/cm3 and an index of refraction of 1.59 @ 589nm.
  • were developed for use as reference or calibration materials and in applications where a high visual contrast is desired. The product line consists of uniform particle sizes between 50 and 500 microns in either red or black color. The microspheres are made from cross-linked polystyrene divinylbenzene (PSDVB) copolymer and can be stored at room temperature. They can be dispersed in aqueous media with the aid of a small amount of surfactant, or in lower alcohols, such as methanol and ethanol. Some dye extraction will result when the particles are suspended in pure alcohols, but will be minimal. Other organic solvents, such as ethers or chlorinated hydrocarbons, should be avoided because they will swell the particles and completely extract the dye. Chromosphere T product include a Certificate of Calbration and Traceability. Typical applications include: • Reference or calibration materials • Testing of filtration media and systems • Vial and container cleaning evaluations • Flow tracing and fluid mechanics • Contamination control • Sedimentation processes • Calibration of injection devices • Pharmaceutical manufacturing control
  • were developed for use as reference or calibration materials and in applications where a high visual contrast is desired. The product line consists of uniform particle sizes between 50 and 500 microns in either red or black color. The microspheres are made from cross-linked polystyrene divinylbenzene (PSDVB) copolymer and can be stored at room temperature. They can be dispersed in aqueous media with the aid of a small amount of surfactant, or in lower alcohols, such as methanol and ethanol. Some dye extraction will result when the particles are suspended in pure alcohols, but will be minimal. Other organic solvents, such as ethers or chlorinated hydrocarbons, should be avoided because they will swell the particles and completely extract the dye. Chromosphere T product include a Certificate of Calbration and Traceability. Typical applications include: • Reference or calibration materials • Testing of filtration media and systems • Vial and container cleaning evaluations • Flow tracing and fluid mechanics • Contamination control • Sedimentation processes • Calibration of injection devices • Pharmaceutical manufacturing control
  • were developed for use as reference or calibration materials and in applications where a high visual contrast is desired. The product line consists of uniform particle sizes between 50 and 500 microns in either red or black color. The microspheres are made from cross-linked polystyrene divinylbenzene (PSDVB) copolymer and can be stored at room temperature. They can be dispersed in aqueous media with the aid of a small amount of surfactant, or in lower alcohols, such as methanol and ethanol. Some dye extraction will result when the particles are suspended in pure alcohols, but will be minimal. Other organic solvents, such as ethers or chlorinated hydrocarbons, should be avoided because they will swell the particles and completely extract the dye. Chromosphere T product include a Certificate of Calbration and Traceability. Typical applications include: • Reference or calibration materials • Testing of filtration media and systems • Vial and container cleaning evaluations • Flow tracing and fluid mechanics • Contamination control • Sedimentation processes • Calibration of injection devices • Pharmaceutical manufacturing control
  • were developed for use as reference or calibration materials and in applications where a high visual contrast is desired. The product line consists of uniform particle sizes between 50 and 500 microns in either red or black color. The microspheres are made from cross-linked polystyrene divinylbenzene (PSDVB) copolymer and can be stored at room temperature. They can be dispersed in aqueous media with the aid of a small amount of surfactant, or in lower alcohols, such as methanol and ethanol. Some dye extraction will result when the particles are suspended in pure alcohols, but will be minimal. Other organic solvents, such as ethers or chlorinated hydrocarbons, should be avoided because they will swell the particles and completely extract the dye. Chromosphere T product include a Certificate of Calbration and Traceability. Typical applications include: • Reference or calibration materials • Testing of filtration media and systems • Vial and container cleaning evaluations • Flow tracing and fluid mechanics • Contamination control • Sedimentation processes • Calibration of injection devices • Pharmaceutical manufacturing control
  • This series is used as NIST traceable calibrants or controls for instruments requiring a higher density and more contrast to incident radiation than that provided by the polymer microspheres. The microspheres are made of soda lime glass which has trace amounts of metallic elements. This makes them easily detectable by non-dispersive X-ray methods and improves their contrast and reflectivity in optical, ultrasonic and electron beam detection methods. Most of the non-spherical and broken particles have been removed, assuring a high percentage of round spheres. They are packaged as dry powders in 1 gram bottles. The soda lime microspheres have a density of 2.4-2.5g/cm3 and an index of refraction of 1.51 @ 589nm. The softening temperature is 720°C and the dielectric constant is 7.3 @ 1 KHz and 20°C. Brands: Thermo Scientific
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