Positive Displacement Pipette
Problem-Free Pipetting of Challenging Liquids
A positive displacement pipette eliminates cross-contamination from aerosols, samples or other pipettes. The Pos-D positive displacement pipette is a smart solution for pipetting "difficult" liquids, such as dense, viscous and volatile samples. Pos-D is specially suited for liquids with high densities, viscosities or vapor pressures. A disposable piston, which moves within a plastic capillary, makes direct contact with the liquid.
Advantages of the Positive Displacement Pipette
Easy Grip
A simple ergonomic finger hook allows you to rest your hand while you work.
Volume Control
The display faces the user, so there is no need to twist the pipette to set or read volume.
Comfortable Feel
The Pos-D handle has a natural feel and fits comfortably in your hand due to larger and more ergonomically designed handle.
Useful Related Links
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Single Channel Pipettes
Rainin single channel pipettes are available in both electronic and manual versions, with both offering LTS and universal tip compatibility. Read more
Pipette Tips
Made from 100% virgin polypropylene in a fully automated, Class 100,000 clean room facility, Rainin pipette tips provide excellent clarity and flexibility for accurate touch-off. Read more
Pipette Calibration
Pipette preventive maintenance and calibration service significantly reduces costs, risks, and liabilities associated with out of calibration pipettes. Read more
6 Ways to Pipette Like a Pro
Order our free pipetting technique posters to help everyone in your lab achieve more consistent results. Read more
Documents
Expert Service – Tailored to Fit Your Pipetting Needs
METTLER TOLEDO supports and services your pipettes through their entire life-cycle, from good pipetting techniques to preventive maintenance and calibration to equipment repair.
Order Pipette Service & Calibration
FAQs
How does a positive displacement pipette work?
Positive displacement pipettes make direct contact with solution eliminating inaccuracies found with air displacement pipettes and hard-to-pipette solutions. With direct contact to solutions, positive displacement pipettes deliver accurate aliquots of hard-to-pipette solutions such as volatile, viscous, corrosive or high salt solutions.
What are the benefits of positive displacement pipetting?
Positive displacement pipettes are a highly advantageous tool in laboratory settings, offering unparalleled accuracy when handling viscous or volatile substances. With each stroke of our Rainin capillary-piston, a precise volume is dispensed, ensuring exact executions throughout the entire process. This not only minimizes errors but also reduces re-work time. Moreover, positive displacement pipetting places safety at the forefront by mitigating the risk of contamination and exposure to hazardous materials. Disposable tips are replaced after each use, thereby preventing cross-contamination and the need for repeated attempts. The combined benefits of accuracy, safety, and efficiency make positive displacement pipetting the preferred method for precise liquid handling, meriting their wide use in research, clinical testing, and other scientific endeavors.