Thermo Scientific™

UltiMate™ LPG-3400XRS Extended Pressure Range Quaternary Pump

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Industrial & Applied Science

Enjoy the flexibility of a quaternary pump with the fast gradient performance of a binary pump. The unique Thermo Scientific™ Dionex™ UltiMate™ LPG-3400XRS Extended Pressure Range Quaternary Pump is an LC/MS optimized quaternary UHPLC pump offering state-of-the-art performance for high speed and ultrahigh resolution applications. The compact pump head design, with a gradient delay volume of just 200µL, supports ballistic gradients for ultrahigh throughput. A combination of speed and flexibility in solvent proportioning makes this pump the first choice as an LC front-end for MS and MS/MS.

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Recommended Use

The LPG-3400XRS pump is recommended for use within UltiMate 3000 XRS systems to take advantage of long, ultra-high resolution columns requiring support for pressures up to 125 MPa (18,130 psi, 1250 bar).


  • Serial dual-piston operating principle, low-pressure gradient proportioning
  • Support of operating pressures of up to 125 MPa (18,130 psi/1250 bar) at flow rates of up to 2mL/min
  • Reliable vacuum degassing with an internal four-channel micro membrane degasser
  • Active rear-seal wash to maximize seal lifetime and instrument uptime