PSL Spheres and polystyrene latex beads are particle size standards used for calibration of laser particle counters and HEPA filter tests.
Polystyrene Latex spheres are NIST Traceable, particle size standards sized from 20 nanometers to 160 microns; which are highly accurate with a monodisperse particle size distribution, suspended in a DI Water solution with a trace surfactant to minimize agglomeration. Polystyrene latex beads are used to create a particle aerosol to challenge the size accuracy of laser particle counters or to produce PSL Wafer standards.
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