ReaXus LD ClassReaXus LD Class

Dual Piston Pumps for Low Pulsation Requirements

The versatile LD Class consists of dual-headed, positive displacement piston pumps, delivering unmatched performance for analytical, flash, and small-scale preparative chromatography applications.

The pumps are designed for high flow rate accuracy and low pulsation required for Analytical Liquid Chromatography (HPLC). Standard fluid path materials are Stainless Steel in addition to optional Hastelloy. Other available features include jacketed heads for temperature controlled processes. With 12 mL/min, 36 mL/min, and 100 mL/min versions, reaching pressures up to 6,000 psi, these pumps will meet the performance requirements of demanding HPLC needs.


Pumps Pharmaceutical BrochureBrochure
ReaXus LD Class DatasheetDatasheets
Pumps Overview BrochureBrochure
ReaXus LD Class ManualUser Manual


When you purchase instruments from Teledyne ISCO, you not only receive innovative, high quality products, you also receive excellent customer service and product support. Your initial purchase is only the beginning of Teledyne ISCO's ongoing commitment to their customers.


​ReaXus LD Class

Flow Rate Range and Max. Pressure Ratings*

​0.0-12.000 mL/min (6,000 psi)

0.0-36.000 mL/min (6,000 psi)

0.0-100.0 mL/min (1,000 psi)


≤0.5% @ 1 mL/min and 1,000 psi (12 mL)

≤2.0% @ 1 mL/min and 1,000 psi (36 mL)

≤4.0% @ 50 mL/min and 250 psi (100 mL)

Pressure Accuracy
​±2.0% of full scale pressure
​Flow Precision

​0.2% RSD (12 mL)

0.5% RSD (36 mL, 100 mL)

Flow Accuracy

​Within 2.0% of set flow rate, 0.20 mL/min and above; 80:20 Water/IPA @ 1,000 psi (12 mL)

Within 2.0% of set flow rate, 0.80 mL/min and above; 80:20 Water/IPA @ 1,000 psi (36 mL)

Within 2.0% of set flow rate, 2.0 mL/min and above; 80:20 Water/IPA @ 500 psi (100 mL)

​Wetted Materials
​​(See Options on Datasheet), Synthetic Ruby, Sapphire, UHMWPE, PTFE

6.3" H x 10" W x 17" D

(16 x 25.4 x 43.2 cm)

​30 lbs. (13.6 kg)
​100-240 Vac (±10%), 50-60 Hz
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.


​​For a full list of product specifications, see the datasheet.




The high performance linear cams, along with automatic pressure compensation, provide precise flow rates for very accurate high pressure and low pressure gradients. Standard features include an integrated Prime-Purge Valve, Pulse Dampener, interactive keypad control, and complete PC control status through RS-232 and Micro USB 2.0 ports. The LD Class provides the precise flow and low pulsation for the most challenging separations.


Flow Rate             ​Pressure              ​Fluid Path             ​Control                

​12 mL/min

36 mL/min

100 mL/min

​Up to 6,000 psi

​Stainless Steel


​RS-232, Micro USB, Run/Stop, Analog (0-10V, 4-20mA)
Jacketed head, Optional