An automizer bulb is a small, hand-operated pump used in laboratories for dispensing small amounts of liquids, such as reagents or solvents. It consists of a rubber bulb and a pipette-like dispenser tube attached to one end of the bulb. The automizer bulb can be compressed or squeezed by hand to draw in a liquid and then released to dispense the liquid in droplets or a fine mist.

Rubber automizer bulbs are preferred over other types of dispensers, such as glass pipettes or plastic syringes because they are less likely to break or contaminate the liquid being dispensed. They are also relatively inexpensive and easy to use, making them a versatile and convenient tool for laboratory work.

Automizer bulbs are commonly used in chemistry and biology laboratories for adding small amounts of liquid reagents to a solution, for rinsing and washing samples, or for creating a fine mist for spraying surfaces. However, they may not be suitable for applications that require precise measurement or control of the liquid volume.