Pipettes are specially calibrated droppers that are used to distribute a precise amount of liquid. There are many different types of pipettes, which include manual, autoclavable, reusable and disposable pipettes. They can be made of plastic or glass and come in various sizes.
The pipette is most commonly used in medicine, biology and chemistry to transport exact volumes of chemicals or medicine when accurate measurements are crucial. Some of these instruments create a vacuum above the liquid reservoir in order to control the amount of liquid being dispensed. The simplest pipettes are manually operated, while the most complex are electric and controlled by advanced computers.