Concept - - Extraordinary volume range

Example of 1 mL/15 無 model

Large Volume Single Piston Mode
Bottom Piston Moving Alone
Flow Rate like 3 mL Syringe

Small Volume Dual Piston Mode
Two pistons moving together
resolution Like a 50 無 syringe

Extraordinary volume range

In the Large Volume Mode, the top piston remains stationary as the bottom piston moves alone in the lower portion of the chamber. Liquid is metered in an amount equal to the volume displaced by only the bottom piston. When the bottom piston moves alone one step, 0.451無 is displaced (solid wafer), about the same volume and flow rate as a 3 mL syringe. In the Small Volume Mode, the top piston follows the bottom piston in the upper portion of the chamber, metering an amount of liquid equal to the difference in volume displaced by the two pistons. When the two pistons move together one step, the volume displaced is only
0.0086 無 (thin annular ring), about the same resolution as a 50無 syringe.