Water baths are used to heat or cool liquid samples in test tubes, cups, or containers to maintain their constant temperature in water media. They are ideal for materials that cannot be exposed to direct heat from an incubator, oven, or hotplate, such as flammable liquids or biological materials. They are used in a wide variety of laboratories.
Choosing a Water Bath For The Lab
-Temperature Range: For basic water baths, the temperature range is typically 30 degrees Celsius to 100 degrees Celsius.Heating/cooling bath allows you to set temperatures above and below room temperatures.
Uniformity and stability Temperature-bath with stirring of the water will improve the uniformity of the temperature.
Size - Check the internal dimensions of the bath to fit the number of samples required to put in the bath.
Additional water bath options:
Water bath with circulation, with shaker, and with a magnetic stirrer.
Types of Laboratory Water Baths
Not all water baths are created equal. Depending on your experiments and samples, here are the main types you’ll come across:
Circulating Water Baths
These are the MVPs when you need precise temperature control. They constantly circulate water, making sure the heat is evenly distributed. Great for experiments where consistency is key.
Non-Circulating Water Baths
More basic, and usually cheaper. But, the heat distribution might not be as uniform. Still, they’re ideal for simpler tasks that don’t require ultra-precise conditions.
Shaking Water Baths
These add a gentle shaking or rocking motion—perfect for biological or chemical samples that require constant movement while being heated.
Refrigerated Water Baths
Need to chill things down instead of heat them up? These units maintain cooler temps and are often used in enzyme reactions or other low-temperature applications.
Application
A laboratory water bath is used to heat samples. Some applications include maintaining cell lines or heating flammable chemicals that can burn if exposed to fire. Different types offer different functionality like a water bath with the circulation that maintains a more uniform temperature or a water bath with a shaker that keeps the samples in motion while they are heated.
How to use a water bath
-Connect the power cord
-Make sure that the water level in the bath is high enough above the heating element.
-Turn the “ON” on the device
-For the temperature settings, press the SET key to set the required temperature. Press ↑ to increase the temperature and ↓ to decrease the temperature.
The temperature in the bath will be maintained during the use of a water bath.
-Turn off the device at the end of use
