Burette
Graduated glass tube with a tap at one end / From Wikipedia, the free encyclopedia
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A burette (also spelled as buret)[1] is a graduated glass tube with a tap at one end, for delivering known volumes of a liquid, especially in titrations. It is a long, graduated glass tube, with a stopcock at its lower end and a tapered capillary tube at the stopcock's outlet. The flow of liquid from the tube to the burette tip is controlled by the stopcock valve.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Burette.svg/50px-Burette.svg.png)
There are two main types of burette; the volumetric burette and the piston burette. A volumetric burette delivers measured volumes of liquid. Piston burettes are similar to syringes, but with a precision bore and a plunger. Piston burettes may be manually operated or may be motorized.[2] A weight burette delivers measured weights of a liquid.[3]