USED AGILENT TECHNOLOGIES G7161A

15-Day
Refurbishment cadence
OEM-Spec
Verified against OEM and published benchmarks; report included.
On-Staff
Solution Scientists
Since 1996
Three decades supporting labs
What you are buying
A refurbished Agilent 1260 Infinity II Preparative Binary Pump, G7161A, with warranty.
Every unit moves through the GenTech Certified process. Solution Scientists disassemble and inspect each module, replace all consumables and degraded wear components, then tune and calibrate the instrument and verify performance against OEM and published benchmarks using known reference chemicals. The instrument ships with its verification report. A certified-refurbished system gives you that performance without the capital cost or the lead time of a new purchase.
What Agilent says about this platform
Agilent designed the 1260 Infinity II Preparative Binary Pump to deliver precise gradient performance and structural ruggedness for semi-preparative and preparative liquid chromatography. Agilent highlights this module for its dual-pump high-pressure gradient blending architecture, which ensures outstanding composition accuracy even at high flow rates up to 50 mL/min. Incorporating automated solvent selection valves on each channel and built-in seal wash assemblies, the G7161A effortlessly manages pressures up to 600 bar to accommodate modern, high-resolution preparative column packings. It stands as a reliable, scale-up pump configuration built to deliver smooth, pulse-free preparative separations and maximize mass recoveries during routine purification workflows.
What this module does
Binary pumping
Rather than a low-flow analytical device, the Agilent G7161A is a dedicated, high-flow binary gradient pumping module within a Preparative Liquid Chromatography (Prep-LC) stack. Positioned at the head of the purification flow path, its primary job is to blend and deliver two mobile phase components at high volumes and pressures to separate bulk sample quantities. This process executes several critical system-wide functions:
High-Flow Gradient Precision: It coordinates two independent high-pressure pumps to blend solvents post-pump, ensuring accurate, highly reproducible composition curves across extended purification runs.
Preparative Scale Stability: It delivers steady, low-pulsation flow profiles at high volumetric rates, maintaining stable chromatographic resolution on large-diameter prep columns.
Automated Solvent Switching: It utilizes internal multi-solvent selection valves, allowing scale-up labs to switch between different mobile phase combinations during unattended method development.
Extended Seal Longevity: It operates an integrated active seal-wash mechanism that continuously flushes the pump pistons, preventing damage from salt crystallization when running highly concentrated buffers.
Technical detail
*OEM specifications for brand new instrument.
What “GenTech Certified” means
Refurbishment at GenTech is a defined process, not a wipe-down. Every system moves through the same specific stages.
1. Disassembly and rebuild. Solution Scientists strip the instrument down, clean each module inside and out, and rebuild it from the frame up. They replace pump seals, pistons, and check valves to specification.
2. Configuration and new parts. Solution Scientists install the options and modules you selected and fit new wear parts throughout. They replace the detector lamp with a new one and reset the lamp hours.
3. Diagnostic and performance testing. Solution Scientists tune and calibrate the instrument, run system diagnostics, and confirm detector wavelength accuracy. They test full-system pressure and gradient performance against OEM and published benchmarks using known reference chemicals.
4. Delivery and installation. The instrument ships in protective packing with a one-year warranty option and professional installation available from a GenTech Solution Scientist.
Labs that run this system
The 1260 HPLC is method-compatible across the techniques most regulated and research labs run every day. These are the application areas buyers ask about most.
Scaled Purifications of Target Active Intermediates
Pharma discovery groups utilize the G7161A to isolate milligram-to-gram quantities of synthesized drug candidates. Accurate high-pressure gradient control ensures clean separation of structural isomers, streamlining compound isolation for downstream testing.
Large-Volume Isolation of Unknown Soil Degradates
Environmental research labs deploy this prep pump to extract and concentrate unknown degradation products from agricultural runoff. The high-flow range speeds up the isolation of target residues from large matrix volumes.
Bulk Extraction of Natural Functional Ingredients
Food science facilities use this high-pressure prep system to isolate pure fractions of target vitamins, antioxidants, or colorants. Reliable binary mixing delivers uniform composition steps, keeping extraction yields highly predictable.
High-Yield Isolation of Minor Cannabinoid Fractions
Cannabis processing laboratories employ the G7161A to isolate ultra-pure standards of emerging minor cannabinoids. The robust 600-bar limit allows labs to use smaller particle size prep columns, maximizing purity levels.
Pure Standard Generation from Seized Materials
Crime laboratories utilize this preparative pump to isolate pristine reference standards from complex, cutting-agent-heavy illicit mixtures. Generating highly pure reference components ensures definitive chemical structures for subsequent legal verifications.
Additional Information
Documentation
Financing

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Need a single module instead?
Replacing a failed pump or expanding an existing stack? Shop our inventory of performance-verified 1260 modules and HPLC upgrades.
[In this listing]
Agilent Preparative Binary Pump G7161A: Verified
Warranty Coverage Extended Options Available: Included
[Each module is individually serialized and performance-verified before the stack is assembled and tested as a complete system.]
Flow Range: 1.0 – 50.0 mL/min (Operating); up to 100 mL/min (Maximum)
Maximum Pressure: Up to 600 bar (up to 50 mL/min); Up to 300 bar (at 100 mL/min)
Gradient Formation: High-pressure binary mixing
Flow Precision: < 0.3% RSD (based on retention time stability)
Composition Range: 1 – 99% (or 0 – 100% with flow restrictions)
Integrated Degasser: Built-in 2-channel vacuum degassing unit
Materials in Contact: Stainless steel, Titanium, PEEK, PTFE, Ceramic, Ruby, Sapphire
Weight: 60 lbs
Dimensions: 24 × 24 × 24 in
Condition: Refurbished
Model: G7161A
OEM: Agilent Technologies
Financing: Financing Options Available