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Autodrop Pipettes

ADVANTAGES • Fast liquid change • Contactless dispensing • Single droplet volumes from 20 pl to 180 pl * • Variation of dispensed volume approx. 1 % * • Very small storage volume • Very small dead volume of about 12 μl • Droplet rate 1 ... 2000 Hz * (provided by a standard driver electronics) • Droplet velocity approx. 2 m/s * • It is possible to dispense fluids with a viscosity up to about 20 mPas * Technology Features Autodrop Pipettes are based on piezo-driven inkjet printing technology. The fluid is aspirated through the nozzle tip into the glass capillary. The integrated piezo actuator induces a shock-wave into the fluid contained in the pipette, which causes a droplet to be emitted from the nozzle. • The inner nozzle diameter of the Autodrop Pipettes strongly influences the droplet size. • The relation between inner nozzle diameter, droplet size and droplet volume is: inner nozzle diameterdroplet size in flight *droplet volume *30 μm35 μm20 pl 50 μm55 μm90 pl 70 μm70 μm180 pl Criteria to find the best Autodrop Pipette • What kind of fluid is to be dispensed (Viscosity, concentration of additives etc.)?
* depending on the fluid used • What kind of solvent is used? • Are there particles in the liquid: Size and concentration of particles? • The spot size on the substrate depends on the wetting behaviour between the fluid and the surface material. • Desired diameter of the droplets • Desired droplet emission frequency • Dispensing volume: a) single droplet b) throughput of droplets per second • microdrop Technologies GmbH are specialized in cus-tomized solutions. Please ask for application-optimized dispenser heads! • How many pipettes are necessary for the application? • Is there an interest to upgrade the system to more than one dispenser head later? • Is an xyz-positioning system required?Need help? Please send us a short description of the application and a datasheet of the fluid.