Click HERE for Discussion of Pilot Length effects on HPLC.

Click HERE for How to Change Ferrules.

Click HERE for How to Connect HPLC Columns using Di-Ad.

No Application Notes information

Our goal is to provide the best Customer Experience possible. If you cannot find what you are looking for, have any questions or would like to give us a suggestion please use any of the following ways to contact us directly. We would love to hear from you.

  • Call us: 8:30AM – 6:00PM EST 1-732-380-8900 and hit 0#

  • Fax to us: 1-910-769-9435

  • Email Customer Support


We are always ready to lend any support we can. Our experienced scientists and professionals are ready to assist you with any technical support questions. Every question is considered a good question and we will work with you on a solution as fast as possible.

  • Call us: 8:30AM – 6:00PM EST 1-732-380-8900 and hit 0#

  • Fax to us: 1-910-769-9435

  • Email Technical Support


  • Reduce Peak Broadening from Poor Connections

  • Quick and Easy Connection with all Brands of Columns

  • Universal, Self Adapting Pilot Length

  • Economical

Directly installed and adaptive to any brand of HPLC Column that uses 10-32 threads, these "Direct Adaptive HPLC Column Connectors" (Di-Ad™ Fittings) make changing columns in HPLC very efficient and prevents adding undesirable extra column volume. Each time you change column brands and therefore end fitting types, the pilot length of the spring loaded Di-Ad™ with perfectly, laser cut tubing will properly adjust length and become compatible with any HPLC column including Waters®, Agilent®, Phenomenex®, Supelco®, Perkin Elmer®, ACE®, Thermo® and of course, Cogent®. No longer will you need to cut off the swaged ferrule to adjust the tubing pilot length for different HPLC column end fittings with different internal dimensions preventing band broadening.

The spring loaded Di-Ad™ fitting will adjust tubing length precisely for different column end fitting internal dimensions such as from Waters, Parker, Swagelok, Valco, IDEX or Shepards brands. Without any tools, simply screw the Di-Ad™ into the Column. So easy, anyone can do it correctly.

Single End Fitting units require a standard 1/16th" stainless steel nut and ferrule or finger tightened fitting to install it on the pump and detector sides of the instrument. Double End Fitting Units will screw into the pump before the column and into the detector after the column and do not require additional nuts and ferrules. Select different tubing ID and Length to suit your own instrument needs for Universal HPLC Column Fittings.

We recommend using the Beta Tool-2 for optimal routing of tubing through your system. It is important that you do not overtighten these fittings. Simply screw on the column until finger tight and then give 1/8th more turn. See video this page.

Click HERE for the Di-Ad™ Fittings Flyer.

  • Pressure Rating Stainless Steel Tubing: 10,000 psi.

  • Pressure Rating PEEK Tubing: 5,000 psi.

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