For the highest level of performance, precision, and reliability, we strongly recommend using our AQ™ brand 9 mm screw‑top or snap‑top vials. These vials are engineered specifically to match the internal dimensions of the vial body and the precise length and outer geometry required by the U‑2D™ inserts. This exact dimensional alignment ensures:

• Consistent vial positioning within the insert
• Reliable alignment for automated and manual handling
• Optimal sealing performance
• Reduced risk of misalignment‑related errors in high‑throughput workflows
• Unmatched quality control and manufacturing consistency

Because the U‑2D™ system depends on tight tolerances for accurate sample positioning, vial construction must be highly uniform. The AQ™ vial line is manufactured with strict bottom‑height and body‑taper specifications that meet these requirements.

Use of Other Brands

Standard wide‑opening 9 mm, 12 × 32 mm screw‑top autosampler vials or wide‑opening snap‑top 12 × 32 mm vials from other suppliers may fit mechanically within the U‑2D™ inserts. However, we do not endorse their use for the following reasons:

• Many third‑party vial manufacturers do not maintain consistent bottom‑height tolerances.
• Variability in vial length or base geometry can lead to:
  • Improper seating in the U‑2D™ insert
  • Inconsistent pickup heights for robotic systems
  • Reduced measurement accuracy in automation
  • Potential sealing or alignment issues

Due to these known inconsistencies in the general market, performance cannot be guaranteed when using non‑AQ™ vials.

Recommendation

For optimal system performance, reproducibility, and longevity of your automation workflows, AQ™ brand vials are the recommended and validated choice for all U‑2D™ Micro Sample Management Inserts.