Capillary Construction

Simplus™ CE capillaries are manufactured from bare fused silica, selected for its superior optical clarity and smooth internal surface. To protect the fragile silica, the capillaries are coated externally with a polyimide layer, which provides:

• Mechanical strength
• Improved flexibility
• Resistance to handling stress
• Protection during instrument installation

Without this coating, fused silica is brittle and prone to breakage, making polyimide essential for routine laboratory use.

Outer Diameter Specifications

The standard outer diameter (OD) for Simplus™ capillaries is:

➡ 365 µm ± 10 µm

This size is widely used in CE instruments and provides a balance of strength, compatibility, and ease of installation into common cartridge‑based and open‑architecture systems.

Mechanical Performance and Bending Stress

The bending stress values for Simplus™ capillaries—measured at various bending radii—are provided in the accompanying technical table. These values help users understand:

• Minimum recommended bending radius
• Expected stress tolerance
• Handling limitations
• Breakage risk during tight instrument routing

In general, a larger bending radius reduces the stress placed on the fused silica core and minimizes the risk of fractures during operation.

Metals Assay

A detailed metals assay of the fused silica material is provided in the corresponding documentation . This information is important for:

• Regulatory submissions
• Contamination‑sensitive applications
• High‑purity requirements in analytical workflows

The assay identifies trace metal content to confirm that the silica meets performance and purity standards suitable for CE applications.

Product Information

For full details, specifications, and ordering options: Simplus Capillary Product Page