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HP 1050 Quat Pump

HP 1050 Quat Pump
HP 1050 Quat Pump

Hydraulic System

Dual-pistons in-series with proprietary servo-controlled

variable stroke drive floating pistons and active inlet valve.

Flow Range

Setpoint from 0.001 to 9.999 ml/min in 0.001 ml/min increments.

Piston Displacement

20 to 100 µl, automatic matched to flow rate or user-selectable.

Flow Precision

<0.3% RSD (typically <0.15%) based on retention time at 0.5 ml/min and 2.5 ml/min.


Operating range from 0-400 bar (5880 psi) up to 5 ml/min; from 0-200 bar (2950 psi) up to 10 ml/min. Display in bar, psi or MPa

Pressure Pulsation

<2% amplitude (typically <1%), 1 ml/min isopropanol at all pressures >10 bar

Compressibility Compensation

User-selectable, based on mobile phase compressibility

Recommended pH Range

2.3 to 12.5 (stainless steel version). Solvents with pH below 2.3 should not contain acids which attack stainless steel. 1.0 to 14 (TI series).

Gradient Formation

Low pressure quaternary mixing/gradient capability using proprietary high-speed proportioning valve. Delay Volume

900 to 1100 µl dependent on back pressure.

Composition Range

0 to 100% in 0.1% increments from four independent channels.

Composition Precision

±0.25% absolute (typically ±0.15%) peak to peak, binary mixed water/acetonitrile from 0.5 ml/min to 5.0 ml/min without mixer.

Solvent Preparation

Four 1 liter bottles each with individually-regulated Helium sparger, cap and filter.

Oven Temperature Range

Ambient +5°C to ambient +60°C in 0.1°C increments. Display in °C, °F or K.

Oven Temperature Stability


Oven Capacity

Two 25-cm or three 20-cm columns.


Integrated keyboard with function keys; parameter editing during run possible; keyboard lock; optional control by PC


Flow rate, compressibility, stroke volume, upper and lower pressure limits, 2 external contacts; %B, %C, %D (for quaternary pump). Time-programmable Parameters: Flow rate, upper pressure limit, external contacts; %B, %C, %D.


Battery-backed storage of up to 10 methods. Automatic start up and shut down methods. Editing of stored methods possible in run.

Analog Output

For pressure monitoring, 2 mV/bar.


Outputs: ready signal and two external outputs (one 24 V relay and one 30V (AC/DC) contact closure, both with 0.25

A. In-and outputs: start, stop and shut down signals. Optional interface for GPIB and RS-232C.

Safety Aids

Extensive diagnostics, error detection and display via front-panel LED's and status logbook. User-definable shutdown method activated in case of error. Leak detection and safe leak handling. Low voltages in major maintenance areas. Column pressure protection with maximum rate of pressure change of <20 bar/sec after a setpoint change.


4°C to 55°C (constant temperature) with <95% humidity (non-condensing).

Power Requirements

Line voltage: 100-120 or 220-240 VAC ±10%

Line frequency: 48-66 Hz

Power consumption: 120 VA max.

This refurbished HP 1050 Quat Pump is in great condition. It has been tested at SpectraLab Scientific.

A 90 day warranty is included.

We are professionals. We encourage you to contact us to speak with one of our expert and professional team. Thanks for looking and we look forward to hearing from you!
  Price: $2,800 USD
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