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Quaternary High Pressure Gradient System
This System includes Q-Grad Pump and an easy-to-use, high sensitivity Model 500 variable UV wavelength detector designed for routine applications. It also includes stand-alone keypad control and software control.
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 as economical as low pressure mixing systems.
Includes ONE (1) YEAR WARRANTY.
- Quaternary high pressure gradient system, with keypad and software control, PEEK
- Quaternary high pressure gradient system, with keypad and software control, Stainless steel
| Model 500 Detector Specifications |
| Range |
UV, 190-380 nm (deuterium lamp)
Visible, 366-800 nm (optional tungsten lamp) |
| Monochromator |
Holographic grating |
| Bandwidth |
6 nm |
| Wavelength Accuracy |
±1nm |
| Wavelength Reproducibility |
±0.1 nm |
| Noise |
± 1x10-5AU, typical |
| Drift |
±2x10-4 AU/hr |
| Absorbance range |
0.0005 to 2.0 AUFS (12 range settings) |
| Integrator outputs |
1V/AU |
| Recorder outputs(Full scale) |
10mV, 100mV, 1V |
| Rise Times |
0.025, 0.1, 0.3, 1.0, or 3.0 seconds |
| Dimensions |
9.75 " x 6.25" x 13.25" (W x H x L)
24.8cm x 16.6 cm x 33.7 cm |
| Weight |
20lbs. (9.1kg) |
| Power |
100, 110, 220/240 Vac; 50/60Hz; 125W |
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| Q-Grad Pump Specifications |
| Flow Rates |
0.001 - 5.000 mL/min. (each pump head) |
| Pressure Stainless Steel |
0 - 5,000 psi |
| PEEK |
0 - 3,000 psi |
| Pulsation |
± 1% @ 1mL/min and 1,000 psi |
| Gradient Accuracy |
within 1% absolute (of set value) @ 1 mL/min. and 1000 psi |
| Pressure Accuracy |
± 1% of full scale pressure |
| Flow Accuracy |
± 2% |
| Flow Precision |
0.2% RSD |
| Voltage |
110-120 Vac, 50/60 Hz; or 220-240 Vac, 50-60 Hz |
| Dimensions |
6.5" H x 12.0" W x 15.5" D ( 165 x 787 x 394 mm); |
| Weight |
42 lbs (19 kg) |
| Standard Pump Features |
- Self-Flushing Pump Heads.
- Pulse Damper for Reduced Pulsation .
- Motor Stall Detector .
- Prime-Purge Valve .
- Stainless Steel or PEEK Fluid Path .
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| Standard Controls |
- RS-232 Serial Com Port (each pump)
- Run/stop Input (each pump) - 5 volt TTL type
- Pressure monitoring and limits
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| Gradient Controls |
- Gradient control is achieved via host PC and 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
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