Drd Diluter Corporation

Donald Schwartz

Humayun Qureshi

A pipette has a first and second piston to provide for a precise dose measurement and delivery, and a second dose which can be an air blowout to fully expel the precise measured first dose. Preferably, two pistons used are of different diameter with a difference in diameters permitting precise measurement of small doses of, for example, 10 microliters or less.

Pipette

A method of metering and dispensing a first liquid, using a probe having an aspiration tip defining a tip chamber. The aspiration tip chamber is sized so as to be capable of holding and metering at least two largely different volumes of a first liquid. In the method a filler liquid is introduced into a portion of the chamber and a first liquid is aspirated in a predetermined amount into the chamber, so that a predetermined amount of the first liquid can be metered and dispensed with high accuracy and precision. The chamber is capable of being used for two largely different doses of the first liquid. Additional liquids can be aspirated along with the filler liquid. The filler using can be a reactant, a cleaner or the like.

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Marblehead, MA, United States of America

Donald Schwartz