Serological pipettes are a common tool used in laboratories for the precise measurement and transfer of liquids. They have come a long way since their inception in the early 20th century, with advancements in materials and design leading to improved accuracy, convenience, and safety.

The earliest serological pipettes were made of glass and were typically calibrated using a blowout bulb. While glass pipettes are still commonly used today, they are being replaced by plastic pipettes due to their greater convenience and lower risk of breakage.

Plastic serological pipettes were first introduced in the 1960s, and have since become increasingly popular due to their disposability and reduced risk of contamination. They are typically made from polypropylene or polystyrene, and are available in a variety of sizes and tip styles to suit different applications.

In recent years, serological pipettes have continued to evolve, with new materials and designs being introduced to further improve accuracy and convenience. For example, some pipettes now feature graduations that are easier to read, reducing the risk of errors. Additionally, some pipettes are now pre-sterilized and individually wrapped, making them even more convenient for use in sterile environments.

One of the latest innovations in serological pipettes is the introduction of electronic pipettes, which use electronic controls to dispense precise volumes of liquid. These pipettes offer even greater accuracy and convenience than traditional pipettes, and are becoming increasingly popular in research and clinical settings.

In summary, serological pipettes have come a long way since their inception, with advancements in materials and design leading to improved accuracy, convenience, and safety. While glass pipettes are still commonly used today, plastic pipettes are becoming increasingly popular due to their disposability and reduced risk of contamination. New innovations, such as electronic pipettes, are also being introduced to further improve accuracy and convenience in liquid handling.