Meniscus (liquid)

Water-based fluids like sap, honey, and milk also have a concave meniscus in glass or other wettable containers.

[2] When reading a depth scale on the side of an instrument filled with liquid, such as a water level device, the meniscus must be taken into account in order to obtain an accurate measurement.

[citation needed] Manufacturers of glassware and other tools calibrate their measurement marks to account for the meniscus.

[citation needed] Menisci are a manifestation of capillary action, by which either surface adhesion pulls a liquid up to form a concave meniscus, or internal cohesion pulls the liquid down to form a convex meniscus.

The tube experiences a downward force of magnitude 2πrσ, where σ is the surface tension of the liquid.

A: The bottom of a concave meniscus .
B: The top of a convex meniscus .
Menisci on a thin fiber.
Menisci on a thin fiber
A meniscus as seen in a burette of colored water. '20.00 mL' is the correct depth measurement.