Capillaries and Connectors
Agilent capillaries, fittings, and connectors are engineered specifically for Agilent HPLC systems to maintain a secure, leak-free flow path and protect the accuracy of your chromatographic results. Each HPLC capillary is manufactured using Agilent’s precision laser-welding process, producing perfectly flat, burr-free ends that eliminate capillary-induced dead volume and prevent unnecessary peak distortion.
Our selection includes high-quality loop capillaries designed for a wide range of autosampler volumes and workflows. Available in both stainless steel and PEEK to accommodate different pressure requirements, these Agilent loop capillaries deliver reliable, high-precision performance across Agilent 1200-series autosamplers and other compatible LC instruments.
As an authorized Agilent distributor, Chrom Tech supplies only genuine Agilent capillaries, fittings, and flow-path components—ensuring OEM-level quality, validated performance, and trusted compatibility with your HPLC system. You can purchase with confidence knowing every part meets Agilent’s stringent manufacturing standards and is supported by Chrom Tech’s knowledgeable technical team.
| Internal Diameter (mm) | Color Code |
|---|---|
| 0.015 | Orange |
| 0.025 | Yellow |
| 0.05 | Beige |
| 0.075 | Black* |
| 0.1 | Purple |
| 0.12 | Red* |
| 0.17 | Green* |
| 0.20 / 0.25 | Blue |
| 0.3 | Grey |
| 0.5 | Bone White |
*MP35N versions include an orange identifying stripe.
| Key | Description |
|---|---|
| W | Swagelok + 0.8 mm Port id |
| S | Swagelok + 1.6 mm Port id |
| M | Metric M4 + 0.8 mm Port id |
| E | Metric M3 + 1.6 mm Port id |
| U | Swagelok union |
| L | Long |
| X | Extra long |
| H | Long head |
| G | Small head SW 4 mm |
| N | Small head SW 5 mm |
| F | Finger-tight |
| V | 1200 bar |
| B | Bio |
| P | PEEK |
What should I consider when selecting capillary tubing for my HPLC system?
Key factors include inner diameter (ID), length, material (stainless steel vs PEEK), and compatible fittings/connectors. Matching ID/length to instrument and column specs minimizes dispersion and preserves resolution.
Why are fittings and connectors so critical for HPLC capillary performance?
They form the seal between tubing and hardware. Poor interfaces introduce leaks and dead volume, causing pressure instability and loss of reproducibility. High-quality, zero-dead-volume connections protect peak shape and accuracy.
What’s the difference between stainless steel and PEEK tubing?
Stainless steel offers high pressure tolerance and broad solvent compatibility. PEEK is flexible and biocompatible but has lower pressure limits—good for bio or inert applications.
Why buy from an authorized distributor like Chrom Tech?
You get genuine OEM parts with validated specs, warranty support, and expert guidance—helping maintain instrument uptime and trustworthy results.
