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Pumps for Medical Equipment Applications


Lee pumps are engineered to provide maximum reliability and precision fluid control while reducing size and weight. Each pump is customizable and 100% tested to ensure reliable, consistent, long-term performance. With our solutions, system designers are empowered to improve throughput and bring innovative, cutting-edge technology to a variety of medical applications.

Our miniature, silent, lightweight, piezoelectric disc pumps generate accurate pneumatic pressure and vacuum, enabling precise, ultra-smooth, high speed gas and liquid flow control. Their small size, light weight, and quiet operation enhance patient comfort in a variety of applications including portable and wearable solutions for compression therapy, blood pressure monitoring, breath analysis, and MRI-compatible equipment. Since quieter fluidic components result in a more realistic training experience, these silent micropumps also provide a significant advantage in patient simulators.

Our highly reliable fixed and variable volume dispense pumps are ideal for positive fluid displacement applications in medical instruments, 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 allow you to handle challenging fluids, minimize system downtime, and position the pump where the system’s fluidics dictate, regardless of accessibility.


With the recent acquisition of TTP Ventus, we are pleased to add piezoelectric disc pumps to our portfolio of miniature, precision pumps. These ultrasonic, pneumatic micropumps generate pressure or vacuum in a small, silent, vibration-free form factor, and are available with or without integrated electronics for added simplicity. Designed for highly accurate, ultra-smooth, gas and liquid flow control, our disc pumps deliver unrivalled pneumatic performance and enable innovation wherever precision control of small volumes is critical. Available in five different product series, these innovative pumps can achieve flow rates up to 2 LPM and pressures spanning from -400 to +600 mbar.

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Fixed Volume Dispense Pumps

Fixed volume dispense pumps are solenoid-driven, chemically inert positive displacement pumps which provide accurate and repeatable dispense volumes ranging from 10 to 175 µL in a small, lightweight package. Lee fixed volume pumps require a simple electrical signal for operation – the pumps aspirate fluid when energized and dispense fluid when de-energized. Integrated check valves, together with our unique housing design and diaphragm seal interface, prevent siphoning when the dispense point is positioned above the fluid reservoir.

Variable Volume Dispense Pumps

Variable volume dispense pumps are stepper motor-driven pumps providing full dispense volumes ranging from 50 to 3000 µL. Lee variable volume pumps 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 for applications requiring feedback on piston movement.

Support & Resources

Support & Resources from a Team that Speaks Your Language

Partner with The Lee Company and get much more than just a supplier of top-quality fluid control products. Our reliable technical support team is available every step of the way to help you find solutions, maximize productivity, and drive efficiency across your operations. Check out these resources specific to the medical equipment industry.