Winkler bottle

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Two glass Winkler bottles with ground glass stoppers, a 250 ml and a 120 ml one, each with calibrated volume.

A Winkler bottle is a piece of laboratory glassware specifically made for carrying out the Winkler test.


These bottles have conical tops and a close fitting stopper to aid in the exclusion of air bubbles when the top is sealed. This is important because oxygen in trapped air would be included in the measurement and would affect the accuracy of the test.

They are similar in construction to BOD bottles, but BOD bottles are inadequate for carrying the Winkler test for oxygen, while Wikler bottles can be used for determining the Biological Oxygen Demand (BOD).


Winkler bottles can be bought from lab suppliers and online.

See also


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