Our highly reliable fixed and
variable volume dispense pumps are ideal for positive fluid displacement
applications where fine control over the dispense resolution is critical.
Boasting high precision volumetric aspirating and dispensing, exceptional accuracy,
and an extensive life, these maintenance-free pumps are also customizable and
100% tested to ensure reliable, consistent, long-term performance.
Our fixed volume dispense pumps are solenoid-driven,
chemically inert positive displacement pumps that provide accurate and
repeatable dispense volumes ranging from 10 to 175 µL in a small, lightweight
package. Requiring a simple square wave electrical signal for operation, the pumps aspirate fluid when energized and dispense fluid when de-energized. The normally closed design (with integrated check valves) prevents siphoning when the pumps are de-energized. Lee fixed volume dispense pumps are available in two different sizes to cover a wide range of dispense volumes.
Variable volume dispense pumps are stepper motor-driven, positive displacement pumps providing full dispense volumes ranging from 50 to 3000 µL. They use a unique drivetrain design to aspirate a volume of fluid accurately and then dispense that fluid volume out in smaller increments. These pumps are available in a single seal or dual seal configuration for improved sealing performance when flowing aggressive fluids. Each pump is equipped with a home sensor to establish the end of stroke position. In some models, an optical motor encoder is included to provide feedback on piston movement.
