The 50XX series pump is precision piston pump developed by Keyto. Its main function is to achieve precision sampling and reagent dispensing. This series of piston pumps are characterized by extremely high aspiration and dispense accuracy and can reach a service life of over 5 million cycles. It is a high-performance, low-cost, maintenance-free precision piston pump that has been widely used in medical devices and laboratory analytical instruments.
Maximum displacement volume(μL)
Plunger diameter (mm):
Lead: S Optional（mm）
S=0.635 or 1.27、2.54
Lead: 0.635 stroke/step（mm/step）
Lead: 1.27 stroke/step（mm/step）
Lead: 2.54 stroke/step（mm/step）
5 million cycles
1/4-28 UNF or M6
Chamber materials in contact with reagents(Optional)4
1: If the working medium is a gas, please check with us.
2: The nominal CV is measured at 2% of the displacement.
3: The nominal accuracy is measured at 2% of displacement.
4: If other types of reagents are used, test verification is required.
5: Please contact the engineer for further information.
Note: Please kindly reach out to our sales team for design and specification final clarification and confirmation.
End position optical detection. Optocoupler sensor can detect whether the pump is in the initial position of aspiration.
Various volumes available, nominal displacement: 50μL~5mL.
Extremely high and stable dosing aspiration and dispense accuracy over the life cycle of the pump. The following table shows the CV when tested with deionised water as the medium：
Aspiration and dispense volume as a percentage of total volume
Piston full stroke: 12.7mm.
Advanced zirconia ceramic piston machining technology, rigorous inspection procedures, and unique sealing solutions ensure that the pump's service life can reach more than 5 million cycles with maintenance-free.
Good chemical resistance of the materials of the components in contact with the liquid medium: A variety of materials available to ensure chemical media compatibility; With different sealing structures to adapt to different working conditions.