It is used to incubate samples in water at a constant temperature over a long period of time.
Uses include warming of reagents, melting of substrates, determination of boiling point, or incubation of cell cultures.
[9] Circulating water baths (also called stirrers [10]) are ideal for applications when temperature uniformity and consistency are critical, such as enzymatic and serologic experiments.
In addition, there are add-ons that provide stirring to non-circulating water baths to create more uniform heat transfer.
[4] This type of water bath has extra control for shaking, which moves liquids around.