Final answer:
A volumetric pipette is the tool used to measure one specific volume only in laboratory experiments due to its design for delivering a fixed volume of liquid accurately.
Step-by-step explanation:
The type of pipette used to measure one volume only in laboratory experiments is the volumetric pipette. This type of pipette is designed to deliver or contain a single, precise volume of liquid when filled to the mark. Unlike graduated pipettes or burettes, which are capable of measuring variable volumes, a volumetric pipette has a fixed volume, making it ideal for tasks requiring high accuracy and precision. It's crucial for accurate dilutions and standard preparations in various chemical experiments.