Dual Reciprocating Plunger Design

The LC-20AT possesses a high level of stability while maintaining high performance during routine use. The ability to remove pulsations has been improved by modifying the pump-head structure and the flow line.


Enhanced Solvent Delivery Specifications
Flow-rate accuracy and precision in the micro-flow rate region have been improved with the addition of a new type of check valve and modifications to the solvent delivery control method. Non-polar organic solvents such as hexane can be delivered stably.
Improved Durability
New and improved plunger seal materials ensure robust, long-lasting performance. A sapphire plunger optimized according to its crystal structure and a precise plunger-holding mechanism help increase the service life of plunger seals and enable stable solvent delivery over long periods.
Space-saving Designs
An optional low pressure gradient valve (LC-20AD/20AT), CBM-20Alite system controller, and a seal wash pump (LC-20AD) can now be installed inside the solvent delivery unit, enabling 4-solvent gradient elution in a compact space. The LC-20AB high-pressure binary gradient pump delivers the performance of two LC-20AD pumps in one compact unit.


Solvent delivery methodParallel-type double plungerSeries-type double plungerParallel-type double plunger (2 sets)
Plunger capacity10µLPrimary side: 47µL, Secondary side: 23µL10µL
Maximum discharge pressure40MPa
Flow-rate setting range0.0001 to 10.0000 mL/min.0.001 to 10.000 mL/min.0.0001 to 10.0000 mL/min.
Flow-rate accuracyNo more than 1% or 0.5µL/min., whichever is greater (0.01 to 2 mL/min.)No more than 2% or 2µL/min., whichever is greater (0.01 to 5 mL/min.)No more than 1% or 0.5µL/min., whichever is greater (0.01 to 2 mL/min.)
Flow-rate precisionNo more than 0.06% RSD or 0.02 min SD, whichever is greater
Pulsation0.1 MPa (for water at 1.0 mL/min. and 7MPa) 0.3 MPa (for water at 1.0 mL/min. and 7MPa)0.1 MPa (for water at 1.0 mL/min. and 7MPa)
Constant-pressure solvent deliverySupported
Plunger rinsing mechanismManual rinsing or automatic rinsing using optional product
Safety measuresLiquid-leakage sensor, high-pressure/low-pressure limits
Operating temperature range 4oC to 35oC
Dimensions, weight260 (W) x 140 (H) x 420 (D) mm, 10 kg260 (W) x 140 (H) x 420 (D) mm, 11 kg260 (W) x 140 (H) x 420 (D) mm, 13 kg
Power requirements100 VAC, 150 VA, 50/60 Hz100 VAC, 180 VA, 50/60 Hz
LC-20AD/20AT, low-pressure GE specifications LC-20AD/20AT, high-pressure GE specificationsLC-20AB
Gradient type Low-pressure mixingHigh-pressure mixing
Number of mixed solvents 4 max.2 or 3 2
Mixing concentration accuracy0.5% max. (LC-20AD), 1.0% max. (LC-20AT) 0.5% max.

For Research Use Only. Not for use in diagnostic procedures.