A measuring cylinder with a glass stopper (often called a mixing cylinder) is a laboratory tool used to accurately measure, mix, and temporarily contain liquid volumes. It replaces the traditional pouring spout with a ground-glass joint, allowing for an airtight, leak-proof seal during agitation.Key Features and DesignAirtight Seal: The precision ground-glass or plastic (penny head) stopper prevents evaporation, shields samples from external contamination, and allows liquids to be shaken without leakage.Material: Typically crafted from high-quality, 3.3 borosilicate glass, offering superior thermal shock resistance, chemical durability, and autoclavability.
Base Stability: Features a wide hexagonal or round flat base to prevent tipping and rolling when placed on lab benches.Graduations: Includes precise, screen-printed volume markings (often Class A certified) for high-accuracy readings of the liquid’s meniscus