Airborne particle counters
PSL aerosol and ISO 21501-4 calibration systems.
Application map
Match the standard to the system
Liquid particle counters
Aqueous size standards or count controls under ISO 21501-2/3 methods.
HEPA / ULPA testing
Challenge-particle family and qualified aerosol method.
Semiconductor SSIS
SURF-CAL suspension or finished wafer-standard workflow.
Optical research
Spherical references for light scattering and response studies.
Colloid and dispersion research
Controlled polymer particle population with documented size and material properties.
Clinical and pharmaceutical contexts
Use application-specific standards and methods
Large PSL particles and count controls can support particle-counting methods in pharmaceutical and clinical laboratory contexts when the material and procedure are appropriate. Do not imply that a PSL product is a diagnostic reagent or compendial solution unless its current intended-use documentation supports that claim.
Regulatory boundary: a reference particle can support an instrument or method; it does not independently make the method compliant.
Research applications
PSL is useful because it is controlled—not because it mimics everything
- Light-scattering response studies.
- Aerosol transport and deposition research.
- Fluid mechanics and dispersion studies.
- Microporous filter and membrane experiments.
- Microscopy or image-analysis checks.
- Colloid stability and surface-interaction studies.
Application intake
When the fit is not obvious
Use the technical requirement brief to document the instrument, medium, target size, certificate and delivery method. Applied Physics can then identify the best family or a custom review pathway.
Applied Physics technical pathway
Match the standard to the measurement—not the other way around.
Send the instrument, medium, target size, concentration, certificate and packaging requirements to Applied Physics for a technical recommendation.