To help protect your investment and further extend the life of our already-rugged LC columns, Restek offers the patent-pending guard column hardware developed by Optimize Technologies. A Restek LC guard cartridge in an EXP direct connect holder is the ultimate in column protection, especially when using dilute-and-shoot or other limited-sample preparation techniques.

• Maximum holder pressure: 20,000psi (1,400bar)
• Free-Turn architecture lets you change cartridges by hand without breaking inlet/outlet fluid connections—no tools needed.
• Patented titanium hybrid ferrules can be installed repeatedly without compromising high-pressure seal.
• Auto-adjusting design provides ZDV (zero dead volume) connection to any 10-32 female port.
• EXP direct connect holder requires separate guard column cartridges; available from Restek in 2.1, 3.0, and 4.6 mm.

EXP Direct connect Holder Instruction Sheet.pdf