The Pasteur pipettes, also known as Droppers are used to transfer small quantities of liquids. This liquid handling tool was first discovered by a famous scientist Louis Pasteur in the 19th century. He is well known for the Pasteurisation process. The “Pasteur Pipettes” were named after his name. The pasteur pipettes are commonly used in laboratories to dispense small amounts of liquid medicines. They are tapered to a narrow opening point at the lower end and fitted with a plastic or rubber bulb at the upper end. The liquid is transferred with the help of a rubber bulb which is fitted on the top of the pipette.
The disposable pasteur pipettes are used only once in the laboratories and then disposed off to avoid the mixing of liquids. They come in 2 different sizes - Short tip Pipettes and Long tip Pipettes both available with and without cotton plugs.
The Short tip pipette is 5.75 inches long (14.6 cm) and is used to transfer liquids in less quantity from small vessels. It can accumulate 1 ml in one time.
The Long tip pipette is 9 inches long (22.9 cm) and is used for liquid handling in large vessels. It can accumulate 2 ml in one time.
The pipettes with a cotton plug come in both short as well as long tips to reduce the contamination risk.