Used to maintain constant temperature of samples and heat or cool them, water baths and chillers find wide application in the laboratory. An overview of purchasing considerations is given in this article. Things to consider include range of temperature the units will be operating in, uniformity and stability of temperature, capacity and footprint of the unit, construction and lids, control features, and add-ons such as immersion chilling and circulating units. External circulating water baths and shaking water baths are other options.
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