Graduated cylinder

• Measuring cylinder 250 ml, with "In" - marking

Low form

A graduated cylinder is a vertical hollow cylinder with spout and base, which is provided with a scale ( scale ) to gauge volumes. Graduated cylinder is also used to determine the bulk density. They are available in low or high form of execution.

In the laboratory measuring cylinders are used mostly made ​​of glass; but they can also consist of plastic. There are also measuring cylinder, made ​​up with the exception of the plastic base made ​​of glass.

Stand cylinders have the same shape, measuring cylinders, but no scale.

The point at which a measuring cylinder is read, having a result of the interaction of the water with the hydrophilic glass, a curved surface ( meniscus ). The scale of the measuring cylinder only shows the correct volume when the lowest point of the meniscus rests parallax on the top of the scale bar. When reading, the eye should always be on the level of the to-read scale bar. A watermark "In" indicates that the measuring cylinder " calibrated to sprue " was. That is, the measured volume is located in the vessel, the amount of liquid absorbed corresponds to the printed volume indication. When emptying to another container, a residual amount still adhered to the wall of the measuring cylinder. Measuring cylinders are frequently wrong as "Ex " - Volumetric instruments used, although they have not been " adjusted to the end ."

Mixing cylinder

A mixing cylinder is a measuring cylinder which is provided instead of a spout with a standard ground (NS ) can be closed by a ground stopper and so used for mixing liquids measured.