English 
Dutch 
French 
High-Performance Isocratic Pumps
The ReaXus® LS Class consists of single-headed, positive displacement piston pumps designed for reliable operation and very low pulsation. This is achieved through advanced cam designs, combined with micro-stepping motor technology and a proven single-piston pump mechanism.
These pumps are suitable for a wide range of applications, including HPLC (including biocompatible separations), semi-preparative LC, metering and dispensing, and general laboratory use.
Performance
The LS Class is available in three flow rate versions:
- 5 mL/min
- 10 mL/min
- 40 mL/min
All models support pressures up to 6,000 psi, allowing them to meet demanding application requirements.
Standard fluid path materials include stainless steel, with PEEK options available. Jacketed pump heads can be used for temperature-controlled processes.
Features
The LS Class includes a range of built-in features to support stable and controlled operation:
- Automatic pressure compensation
- Pulse dampener
- Integrated Prime-Purge valve
- Interactive keypad control
- RS-232 and Micro USB connectivity for PC control and status
Additional control options include Run/Stop functionality and analog control (0–10 V, 4–20 mA).
Design
The LS Class is designed to provide a high performance-to-cost ratio within a compact form factor, combining low pulsation performance with a space-efficient design.
Specifications
| Flow Rate Range and Max. Pressure Ratings* | 0.0-5.000 mL/min (6,000 psi Stainless) (5,000 psi PEEK)
0.0-10.00 mL/min (6,000 psi Stainless) (5,000 psi PEEK) 0.0-40.0 mL/min (1500 psi) |
| Pulsation** | ≤1.5% @ 1 mL/min and 80:20 Water/IPA; 1,000 ps (5 mL)
≤2.0% @ 1 mL/min and 80:20 Water/IPA; 1,000 psi (10 mL) ≤2.0% @ 4 mL/min and 80:20 Water/IPA; 1,000 psi (40 mL) |
| Pressure Accuracy | ±50 psi |
| Flow Reproducibility | 1% RSD (0.500 – 5.000 mL/min; 80:20 Water/IPA; 1,000 psi) (5 mL)
1% RSD (1.00 – 10.00 mL/min; 80:20 Water/IPA; 1,000 psi) (10 mL) 1% RSD (0.5 – 40.0 mL/min; 80:20 Water/IPA; 1,000 psi) (40 mL) |
| Flow Accuracy | ±2% (0.500 – 5.000 mL/min; 80:20 Water/IPA; 1,000 psi) (5 mL)
±2% (1.00 – 10.00 mL/min; 80:20 Water/IPA; 1,000 psi) (10 mL) Within 2.0% of set flow rate, 2.0 mL/min and above; 80:20 Water/IPA @ 500 psi (100 mL) |
| Wetted Materials | PEEK pumps may include: PEEK, Synthetic Ruby, Sapphire, Zirconia, UHMWPE, FFKM, PFA, ETFE
Stainless Steel pumps may include: 316 Stainless Steel, PEEK, Synthetic Ruby, Sapphire, Zirconia, UHMWPE, PFA, PTFE, ETFE |
| Dimensions | 6.4″ H x 7″ W x 16″ D
(16.3 x 17.8 x 40.6 cm) |
| Weight | 15.5 lbs. (7.0 kg) |
| Power | 100-240 Vac (±10%), 50-60 Hz |
| Control | RS-232, Micro USB, Run/Stop, Analog (0-10V, 4-20mA) |
| *Flow Rate is dependent on solvent selection and operating pressure.
**Pulsation value with pulse dampener. |
|
Not sure which pump fits your needs?
Compare models here!
| ReaXus Class | Key differences |
|---|---|
| M1 Class | Compact design focused on affordability while maintaining high precision and performance |
| MX Class | Economical design with eccentric drive and shaped cam mechanism |
| LS Class | Advanced cam design providing very low pulsation for improved flow stability |
| LD Class | Dual‑headed pump for high versatility in analytical, flash, and small‑scale preparative chromatography |
| PR Class | Dual‑headed, rugged construction optimized for high flow accuracy and excellent pressure capability across varied applications |
