Description
4000 Series Dry Monosized Beads are precision-sized spherical particles developed for applications that require consistent particle dimensions and controlled size distribution. Their calibrated diameters make them suitable for particle size analysis, microscopy, laser particle counter calibration, and other analytical applications.
The dry bead range includes nominal particle sizes from 200 µm to 1000 µm. Each size is calibrated using NIST-traceable microscopy methods, and particle size distribution and uniformity are evaluated using optical microscopy or electrical resistance analysis, as applicable.
The 200 µm to 650 µm variants are manufactured from polystyrene crosslinked with divinylbenzene (PS-DVB). The 750 µm and 1000 µm variants are identified separately as polymer products. Each package contains 1 gram of dry spheres and includes a Certificate of Calibration and Traceability to NIST.
Key Features
NIST-traceable particle size calibration
Uniform, dry spherical particles
Nominal particle sizes from 200 µm to 1000 µm
Optical microscopy calibration
Controlled particle size distribution
Suitable for microscopy, particle analysis, and instrument calibration
Supplied in a 1 g package
Includes a Certificate of Calibration and Traceability to NIST
Technical Specifications
| Specification | Details |
|---|---|
| Product Series | 4000 Series |
| Product Type | Dry Monosized Beads |
| Nominal Size Range | 200 µm to 1000 µm |
| Package Quantity | 1 g |
| Particle Form | Uniform dry spheres |
| Calibration Method | NIST-traceable microscopy |
| Size Distribution Measurement | Optical microscopy or electrical resistance analysis |
| Density | 1.05 g/cm³ for PS-DVB variants |
| Refractive Index | 1.59 at 589 nm (25°C) for PS-DVB variants |
| Additives | May contain trace amounts of dispersant |
| Certification | Certificate of Calibration and Traceability to NIST |
| Storage | Room temperature, in a dry area |
| Stability | Minimum 24 months |
200 µm Variant Specifications
| Specification | Details |
|---|---|
| Catalog Number | 4320A |
| Nominal Particle Diameter | 200 µm |
| Particle Material | Polystyrene crosslinked with divinylbenzene (PS-DVB) |
| Particle Count | 2.3 × 10⁵ particles/g |
| Standard Deviation | 5.7 µm |
| Coefficient of Variation | 2.9% |
| Package Quantity | 1 g |
Storage and Handling
Store the beads at room temperature in a dry area. Keep the container upright and tightly sealed when not in use. Avoid unnecessary exposure to moisture and airborne contamination. Respiratory protection from dust is recommended when handling the dry particles.
Included Documentation
Each package includes:
Certificate of Calibration and Traceability to NIST
Calibration method and measurement uncertainty information
Chemical and physical properties information
Safety Data Sheet
Product relationship
Available Through Applied Physics
Applied Physics supplies and supports quotation of this product. Product branding and manufacturer information, where stated on the product page or supporting documentation, remain authoritative.
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Catalog relationship: Available Through Applied Physics
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