Thermo Scientific™ 4000 Series Monosized Particles Available on GSA/VA Contract for Federal Government customers only.

Minimize response of analytic systems to shape effects with monosized particles.

Manufacturer: Thermo Scientific™ 4220A

 View more versions of this product

Catalog No. 09-980-057

  Check Availability
Add to Cart


    Type Size Standard Particles
    For Use With (Application) Narrow Size Standard Deviation Applications
    Diameter (Metric) 19.99μm ± 0.25μm
    Additive Contains trace amount of surfactant to inhibit agglomeration and promote stability
    Description NIST traceable particles that provide calibration of laser particle counters
    Diameter (Metric) Particle 19.99 ± 0.25µm
    Includes Certificate of Calibration and Traceability to NIST
    Material Polystyrene,Polystyrene
    Particle Density 1.05g/cm³
    Quantity 15mL
    Refractive Index 1.59 at 589nm (25°C)
    Size Distribution s = 0.28µm, 1.4% CV
    Stability Product stable for a minimum of 24 months
    Storage Requirements Store in a tightly closed container, between 4° to 30°C. Keep bottle upright and tightly sealed. Mix product with gentle inversion by hand or vortex mixer.
    Certifications/Compliance Each package of standards contains a Certificate of Calibration and Traceability to NIST which includes a description of the calibration method and its uncertainty, and a table of chemical and physical properties.
    Composition Polystyrene
    Concentration 0.3% solids
    Contents Polymer particles in water
    Item Description Dia.: 19.99um +/- 0.25um, sigma = 0.28um, 1.4% CV

    Minimize response of analytic systems to shape effects with Thermo Scientific™ 4000 Series Monosized Particles, excellent for use with any application that requires a NIST™ traceable size standard with a very narrow standard deviation.


    • Particle spheres are used instead of irregularly shaped particles.
    • Mean diameters have been calibrated with Thermo Fisher Scientific™'s NIST™ traceable microscopy methods.
    • Size distribution and uniformity are measured by electrical resistance analysis or optical microscopy.
    • 4000 Series particles from 1 to 160µm are made from polystyrene (PS)
    • 4000 Series particles from 200 to 1000µm are made from polystyrene crosslinked with divinylbenzene (PSDVB).

    Ordering Information:

    Products from 1 to 160µm are packaged as aqueous suspensions in 15mL dropper-tipped bottles, at an optimum concentration for dispersion, handling and dilution. Diameters of 200µm and larger are packaged as dry spheres. Packages are lot-numbered for convenient technical service and support after the sale.

    Thermo Fisher Scientific™ has its own engineering, production and metrology facilities for better quality control and response to customer needs. In addition to this line of polymer size standards, we also offer calibration standards in silica and glass materials. Ask our technical service department for information about specific applications or other product needs not listed here.


    Certificate of Calibration and Traceability to NIST, which includes a description of the calibration method and its uncertainty; Table of chemical and physical properties; Material Safety Data Sheet

  • Description & Specifications

Related Products

Product Content Feedback

We continue to work to improve your shopping experience and your feedback regarding this content is very important to us. Please use the form below to provide feedback related to the content on this product.

Product Title

By clicking Submit, you acknowledge that you may be contacted by Fisher Scientific in regards to the feedback you have provided in this form. We will not share your information for any other purposes. All contact information provided shall also be maintained in accordance with our Privacy Policy.

Cancel Submit