Innovation

Positive displacement pipetting: the accurate way to handle liquids

Revolutionary, automated positive displacement pipetting

The difficulties of pipetting accurately at low volumes are well known, as are issues associated with handling viscous liquids. Our innovative technology development team have overcome these with the novel use of positive displacement dispensing from disposable tips in all of our liquid handling products.

What is positive displacement?


Positive displacement pipetting is defined by the fact that the piston, moving the liquid in and out of the tip for aspiration and dispensing, comes into direct contact with the liquid itself.

This piston based pipetting action results in highly accurate liquid handling across a very broad volume and viscosity range.

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Products powered by this technology


mosquito® uses positive displacement, disposable micropipettes to handle low volumes (25 nL - 5 uL) of liquid in plate to plate, or intra plate, transfers using contact dispensing - thus it’s ideal for traditional pipetting tasks that users would like to miniaturise.

dragonfly® handles much larger volumes (200 nL up to 4 mL) using disposable positive displacement tips to aspirate from reservoirs and dispense non-contact to wells within plates.  It is therefore ideal for combination and bulk reagent dispensing as well as accurate handling of difficult liquids classes.

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How positive displacement enhances data integrity and improves efficiency

reduced set up time and training requirements

intuitive and logical operation simplifies user experience

no liquid classification requirements

accurate dispensing, irrespective of liquid type

rugged and robust performance

disposable tips, piston based pipetting and no pressure system or valves

more than just dispensing

our instruments are true pipettors able to aspirate, dispense and even mix

do more with less

direct sample aspiration ensures minimal dead volumes

accurate and repeatable dispensing

innovative automated positive displacement pipetting

mosquito: accurate low volume pipetting  

Each of mosquito’s disposable micropipettes has its own individual piston, not an air gap or system liquid, offering true positive-displacement pipetting with no risk of cross-contamination. This provides accurate and repeatable nanolitre to microlitre pipetting, every time, irrespective of liquid viscosity.

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dragonfly: revolutionary non-contact dispensing 

Each of dragonfly’s disposable tips has its own individual piston, not an air gap or system liquid, offering true positive-displacement, non-contact dispensing with no risk of cross-contamination. This provides accurate, repeatable and highly reliable, wide dynamic range dispensing, every time, irrespective of liquid viscosity.

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