How To Use a Water Bath

A water bath is a piece of equipment that works as a heated water container, often found in education laboratory settings and general laboratories. They have a range of uses, from incubating samples and keeping them warm to gently heating mixtures to a desired temperature, melt waxes or warm yeast.

Water baths are a useful piece of equipment to have on hand, and it is important to clean the insides of the baths regularly to minimise scale and scum build up. Some bath manufacturers may even advise you to only use distilled water, it still requires regular cleaning but will reduce scaling.

In this quick guide, we look at:

1. How To Prepare a Water Bath
2. How To Use a Water Bath
3. How to Maintain a Water Bath

How To Prepare a Water Bath

To prepare a water bath, you need to fill the container to the desired level with distilled water. You can then switch the water bath on and set your required temperature on the temperature controller. Wait until the water has reached the set temperature; the length of time this takes will depend on the temperature you need the water to be. You can use the thermometer to monitor the water temperature. Once it has reached the temperature, you are ready to start using the water bath.

How To Use A Water Bath

Using a water bath is relatively straightforward, but it is crucial you get it right to avoid damaging or compromising your samples.

The basic steps for a hot water bath are:

1. Ensure the surrounding area is dry and clean.
2. Connect the power supply.
3. Make sure the water is at the desired level and high enough to cover the heating element.
4. Switch the water bath on.
5. Set the temperature controls to the desired temperature and wait until the thermostat shows it has heated enough.
6. When heating, insert your samples carefully. The temperature sensor will maintain the temperature during use.
7. After use, remove the samples and switch off the water bath.

How To Maintain A Water Bath

No matter the type of water bath you are using, proper maintenance is essential for a prolonged life.

Firstly, you must consider the type of water you are going to be using. As mentioned above, distilled water works best because tap water can contain minerals that build up over time.

Secondly, make sure you drain the water bath each time to keep it in good condition. You need to take the time to clean this equipment regularly.

To clean a water bath, make sure it is switched off and remove the container. Wipe down the seal to clear any debris and be very careful not to spill water into the unit, as it can damage electrical components.

Never use corrosive cleaning agents on a water bath, and only clean with a damp cloth and mild detergent.