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Invitrogen™ Countess™ Test Beads, 1mL
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One ml of test beads at 1 x 106 beads/ml.
Specifications:
| Application | Cell Analysis | ||
| Storage Temperature | 2-8°C | ||
| Product Type | Calibration Standard | Forms | Liquid |
| Product Brand | Thermo Fisher Scientific™, Invitrogen | ||
| Product Grade | Molecular Biology | ||
Invitrogen™ Countess™ Test Beads are 10 µm latex microspheres designed specifically for use with the Countess™ family of automated cell counters. These test beads provide a reliable, standardized method for verifying the accuracy of cell counting and sizing functions before performing critical cell-based assays. Each 1 mL vial contains a suspension of latex beads at a defined concentration of 1 × 10⁶ beads/mL, with bead diameters tightly controlled to 10 µm ±10%.
By mixing the beads 1:1 with trypan blue and loading them into a Countess Chamber Slide, users can quickly assess and confirm instrument performance for both total count and size accuracy.
Key Features
- 10 μm ±10% latex beads for size and count calibration
- Standardized concentration of 1 × 10⁶ beads/mL ±10%
- Ideal for verifying cell counting accuracy and instrument calibration
- Easy-to-use with Countess chamber slides and automated counters
- Helps ensure consistent results across cell culture experiments
- Supplied ready-to-use; requires only mixing with trypan blue
- Essential tool for routine QC in high-throughput labs
Specifications
| Property | Detail |
|---|---|
| Product Type | Countess Test Beads |
| Particle Size | 10 μm ±10% |
| Bead Concentration | 1 × 10⁶ beads/mL ±10% |
| Detection Method | Colorimetric (Brightfield) |
| Compatible Instruments | Countess™, Countess II FL, Countess 3, Countess 3 FL |
| High-throughput Compatibility | Not high-throughput compatible (manual) |
| Compatible Dyes | Trypan Blue (1:1 mix recommended) |
| Volume | 1 mL |
| Storage Conditions | 4 °C |
| Shipping Conditions | Room Temperature |
| Regulatory Status | For Research Use Only |
Applications
- Verifying performance of Countess™ cell counters
- Calibration check for cell size accuracy
- System QC before routine cell culture viability or counting
- Cell counter training and troubleshooting
- Standardized reference for instrument comparisons
Invitrogen™ Countess™ Test Beads (C10284) offer a convenient and consistent quality control tool for labs using Countess™ automated cell counters. With tightly controlled size and concentration, these latex microspheres allow researchers to verify the precision of their cell counting systems before beginning critical workflows—helping to reduce experimental variability and enhance reproducibility.