Dionex GS50 Gradient Pump

Pump

Dual-piston (in series), variable speed, 100 µL per revolution

Settable Flow Range

0.0 mL/min, or from 0.05 to 5.0 mL/min in increments of 0.01 mL/min. Note: The GS50 is optimized for operation at 1.5 mL/min or less

Proportioning Type

Low pressure

Compositional Range

0% to 100% in 0.1% increments

Gradient Linearity

Four concave, four convex, one linear

Flow Accuracy

<1% of set value or ± 2 µL/min, whichever is greater

Flow Precision

<0.2%

Compositional Accuracy

<± 1%

Operating Pressure

35 MPa (5000 psi), maximum

High Pressure

Limit

691 kPa to 35 MPa (100 to 5000 psi) in increments of 0.1 MPa (14 psi); trips instantaneously

Low Pressure Limit

0 to 34 MPa (0 to 4900 psi) in increments of 0.1 MPa (14 psi); a start-up delay prevents false tripping

Delay Volume

Low delay volume: <400 µL

Standard delay volume: <800 µL

Pressure Ripple

<1% at 13.8 MPa (2000 psi) and 1.0 mL/min