High Pressure Gradient at Low Pressure Cost

The Q-Grad Pump provides high-pressure quaternary gradients for HPLC applications.  Four high-performance pumps are packaged into a single cabinet. The result is high-pressure gradient capability that is more accurate and more economical than low-pressure mixing systems.

Reliability and Simplicity

The Q-Grad Pump uses a very efficient pulse damper mixer to ensure high performance gradients.  A prime-purge valve and upper and lower pressure limits are also standard.  All SSI pumps carry a 3-year warranty.

Integrates Into Automated Systems

External synchronization from an injector  or autosampler may be enabled using standard TTL or contact closures. When part of a Unity system, the Q-Grad is fully integrated into the control package.

Choose Your Control Method

Three methods of control are available: 

1.        Stand-alone keypad (System Control Unit);

2.        PC using SSI Q-Grad software;

3.        EZStart system control and data acquisition gives control of the Q-Grad pump, detector, and autosampler with EZChrom software. 

All have Run/Stop inputs and real-time pressure monitoring.  Each option is designed to be user friendly.  You choose the interface that fits your needs.

Unmatched Gradient Performance

STANDARD PUMP FEATURES

• Self-Flushing Pump Heads 

• Pulse Damper for Reduced Pulsation

• Motor Stall Detector

• Prime-Purge Valve

• Stainless Steel or PEEK Fluid Path

STANDARD CONTROLS

• RS-232 Serial Com Port (each pump)

• Run/stop Input (each pump) - 5 volt TTL type

• Pressure monitoring and limits

GRADIENT CONTROL

¨        Gradient control is achieved via host PC and SSI Q-Grad control software or keypad control unit.

¨        Typical Pump Gradient Percent Range:

                0-100% in 0.1% increments.

                Percents B, C, D programmable; Percent A automatically adjusted.

Q-Grad Reproducibility Study – Linear and Step Gradient Profiles superimposing 5 different pump head combinations

Specifications subject to change without notice.