Thermo Scientific™

UltiMate™ LPG-3400RS Rapid Separation Quaternary Pump

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Industrial & Applied Science

For the highest degree of flexibility with solvent proportioning in UHPLC or conventional LC, the Thermo Scientific™ Dionex™ UltiMate™ LPG-3400RS Rapid Separation Quaternary Pump supports ternary and quaternary gradients over an industry-leading flow-pressure footprint. It supports the use of up to four solvents at up to 15,000 psi (100 MPa) and a recommended flow rate range from 200µL to 8.0mL/min. with excellent flow stability. This pump adapts easily to multiple fast routine applications or method development in the pharmaceutical, food and beverage and environmental industries.

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Recommended Use

The LPG-3400RS provides the highest degree of flexibility in solvent proportioning for UHPLC applications. This pump is recommended for a wide range of research and routine applications, and for method development. For higher-pressure separation needs, choose the LPG-3400XRS pump. For routine applications requiring up to 62 MPa (9,000 psi, 620 bar), choose the LPG-3400SD pump.

Simple Method Transfer

UltiMate 3000 Standard (SD) and RS pumps and system configurations provide similar gradient delay and extra-column volumes. This simplifies the method transfer between method development labs commonly using UHPLC pumps and QC and production labs with their standard LC pump configurations.


  • Serial dual-piston operating principle, low-pressure gradient proportioning
  • Wide operating flow rate range from 200µL to 8mL/min. with high flow rate accuracy
  • Support of operating pressures of up to 100MPa (15,000 psi/1000 bar)
  • Thermo Scientific™ SmartFlow™ technology to automatically compensate for compressibility; no manual solvent setting needed
  • Large selection of Thermo Scientific™ SpinFlow™ mixing volumes perfectly balance gradient delay volume with mixing efficiency
  • Reliable vacuum degassing with an internal four-channel micromembrane degasser
  • Active rear-seal wash to maximize seal lifetime and instrument uptime