Universal HPLC Column Connectors – Di‑Ad™ | Self‑Adapting Fittings

Di‑Ad™ universal HPLC column connectors are direct‑adaptive fittings designed to eliminate peak broadening caused by improper column connections and inconsistent pilot lengths. These self‑adapting connectors install directly into HPLC columns using standard 10‑32 threads, providing fast, reliable, and low‑dead‑volume connections across virtually all column brands.

Di‑Ad™ connectors are engineered to automatically adjust pilot length to match the internal dimensions of different column end fittings, removing the need for manual tubing adjustment or swaged ferrule removal when changing columns.

Why Pilot Length Matters in HPLC

Improper pilot length at column connections can introduce extra column volume, leading to:

• Peak broadening

• Reduced separation efficiency

• Irreproducible chromatography when switching column brands

Traditional fixed‑length tubing requires manual trimming each time column end‑fitting geometries change. Di‑Ad™ connectors solve this problem through a spring‑loaded, self‑adjusting pilot design.

Self‑Adapting Connector Design

Key design features include:

• Spring‑loaded pilot that automatically adjusts to different column end‑fitting depths

• Precision laser‑cut tubing for minimal dead volume

• Direct installation into columns — no tools required

• Compatible with a wide range of column manufacturers and end‑fitting styles

Di‑Ad™ connectors adjust precisely for internal dimensions from: Waters®, Parker, Swagelok, Valco, IDEX, Shepards, and other common fitting standards.

Universal Column Compatibility

Di‑Ad™ connectors are compatible with any HPLC column using 10‑32 threaded end fittings, including columns from:

• Waters®

• Agilent®

• Phenomenex®

• Supelco®

• PerkinElmer®

• ACE®

• Thermo®

• Cogent®

This universal compatibility makes Di‑Ad™ connectors ideal for laboratories and OEM systems that use multiple column brands.

Configuration Options

• Single‑end connectors Require a standard 1/16″ stainless steel nut and ferrule (or finger‑tight fitting) for installation on pump or detector sides.

• Double‑end connectors Screw directly into both the pump‑to‑column and column‑to‑detector connections and do not require additional nuts or ferrules.

Multiple tubing internal diameters and lengths are available to match specific system configurations.

Installation & Best Practices

Installation is simple:

• Screw the Di‑Ad™ connector into the column until finger‑tight

• Apply an additional ⅛ turn — do not overtighten

Proper tubing routing is recommended to avoid mechanical stress. Tools such as the Beta Tool‑2 may be used to assist with optimal tubing alignment.

Materials & Pressure Ratings

Available tubing options include:

• Stainless steel tubing — rated to 10,000 psi

• PEEK tubing — rated to 4,500 psi

Material selection should be based on pressure requirements and system chemistry.

Why Choose Di‑Ad™ Connectors

• Reduces peak broadening caused by poor connections

• Eliminates repeated tubing trimming when changing columns

• Supports fast and error‑free column installation

• Ensures consistent, low‑dead‑volume connections

• Ideal for multi‑column laboratories and OEM system designs

Additional Resources

• Di‑Ad™ connector product flyer