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Polystyrene Microsphere Dry Powder, Particle Size Standards, BUY below


Applied Physics USA Provides Polystyrene Dry Powder, Particle Size Standards.


PSL Spheres, polystyrene latex beads, calibrated polymer micro-spheres for particle size standards used to calibrate airborne optical particle counters. OPC counters are required to meet ISO 21501-4 requirements for size calibration. These dry micro-spheres are a dry powder used in a variety calibration applications by Pharmaceutical QA/QC managers in pharmaceutical, biotech; as well as aerosol and electronic engineers. The peak size of the microsphere beads has a calibration variation about the mean of 2.5% or less of the mean particle diameter.


These dry polystyrene latex microspheres are a dry powder made from Polystyrene divinylbenzene and has a CAS # of 9003-70-7. The dry powder is used in aerosol particle counter calibration. The size diameter is traceable to SRMs of the National Institute of Standards and Technology (NIST). Each bottle comes with a Certificate of Calibration and Traceability in support of QA/QC audits, as well as calibration requirements.

  • Mean particle size standard has an uncertainty of ≤2.5% to support ISO and size calibration of laser particle counters and air particle counters
  • Size peak has a narrow distribution for calibration of your OPC and LPC counters
  • The microsphere size peak is traceable to NIST SRM standards
  • Certificate of Traceability is included with each product in support of QC and QA compliance
  • Sizes available cover the key size calibration points of 3μm, 5μm, 7μm and 10μm
  • Each 1 gram of dry powder is contained in a dropper-tipped bottle for quick insertion into a sample chamber


Title Range Discount
Quanitity Discount 6 + 10%
Quanitity Discount 5 - 5 7.5%
Discounts are available for purchases of quantity 5 or more.
Product price
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DRY POWDER, PSL Spheres, Polystyrene Divinylbenzene (PS-DVB), 3 microns to 10 microns, Product Part # Nominal Diameter, size peak is NIST Traceable. Size Particle Standards

CAS #: 9003-70-7, used in calibration, particle testing.

% Solids

Volume Price per Bottle of 1 gram, dry powder
AP4D-03  3 microns 100% 1 Gram

$695.00Request a Quote or Add To Order

AP4D-05 5 microns 100% 1 Gram

$695.00Request a Quote or Add To Order

AP4D-07 7 microns 100% 1 Gram

$695.00Request a Quote or Add To Order

AP4D-10 10 microns 100% 1 Gram

$695.00Request a Quote or Add To Order


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