Funnel

A funnel (from the Latin traiectio "transition" ) is a device that allows you liquids or fine-grained substances into containers with a small opening can fill eg bottles without spilling something. When quality of the neck formers (the thin portion ) is provided on the outer side with a groove or a bead, which serves to allow air to escape from the vessel to be filled.

Shall be separated from a suspension in the laboratory small amounts of solids, we used the Hirsch funnel with suction tube. For the separation somewhat larger amounts of solids are used in the laboratory a Buchner funnel or a glass suction filter.

Conical ground joint funnels are ideal for filling liquid or powder reagents in multi-necked flask, since the hopper body is flattened laterally and the stem end in each case the NS - cone sections NS 14 /23, NS 19/26 or NS are matched 29/32.

Powder funnel have only a few centimeters long, very wide stem and are for filling of solids in storage bottles or test tubes (for example, round-bottomed flask ) appropriate.

Dropping funnel with standard ground joints are used in chemical laboratories often part of apparatuses for preparative synthesis of substances. There are embodiments with and without pressure compensation.

Large funnel in a port

Roman kitchen funnel made ​​of ceramic (1st - 3rd century), standing on the head

Hot water funnel for hot filtration

Funnel with steam-heated coil for hot filtration

Powder funnel glass, standing on the head

Funnel made ​​of porcelain

Buchner funnel with inlaid round filter paper in a filter flask with an attached vacuum hose

Glass funnel with inlaid round filter

Saying

Funnel The verb means colloquially " teach someone something forcibly ." Bring someone on the funnel means colloquially " to lead someone to a own knowledge."