Optical particle-counter response
Selected nodes for airborne or liquid light-scattering systems, subject to method requirements.
Current family profile
20–900 nm aqueous PSL standards
| Attribute | Current Applied Physics family-level description |
|---|---|
| Material | Polystyrene latex spheres in aqueous suspension |
| Nominal range | 20–900 nm |
| Common bottle volume | 15 mL on the current family page; verify current options |
| Solids concentration | 1% on the current family page |
| Density | Approximately 1.05 g/cm³ |
| Refractive index | Approximately 1.59 at 589 nm and 25°C |
| Suggested storage | 2–8°C on the current family page |
| Documentation | Lot-specific certificate and handling documentation |
Node selection
Use the certified mean—not the rounded catalog target
The current family lists discrete nominal nodes across the range. The lot certificate can report a certified mean that differs from the rounded nominal designation. Use the certified result in the calibration or verification record.
Example principle: a “50 nm” catalog node may have a lot-specific certified mean near—but not exactly—50 nm. The lot value controls.
Applications
Where the submicron family is most plausible
Aerosol calibration research
Generation of controlled PSL aerosols under a qualified system.
Semiconductor deposition
Input material for selected PSL wafer-deposition workflows.
Light-scattering studies
Reference spherical particles for optical and colloidal research.
Before ordering
Send a complete requirement
- Instrument or deposition-system model.
- Target nominal node and acceptable certified range.
- Required uncertainty and CV.
- Concentration and bottle volume.
- Application medium and preparation method.
- Certificate, shipping and storage requirements.
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.