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Circulated Water Bath (Heater Circulator Sold Separately) TWBC

The circulated water bath range consists of a stainless steel tank that is filled with water and heated to a precise temperature using an electric heating element.

The water is then circulated throughout the bath using the TU3 heater circulator, creating a uniform temperature throughout the bath.


The water bath is a fundamental piece of equipment in any laboratory. As a leading manufacturer and supplier of laboratory equipment in Australia, Thermoline Scientific offers a range of quality laboratory water baths to suit various applications.

Circulated water baths are often used to maintain a constant temperature for experiments or keep samples at a specific temperature for extended periods. They are particularly useful for experiments that require a stable temperature environment, such as in molecular biology, microbiology, and chemistry. The ability to set and maintain a specific temperature ensures that experimental results are consistent and reliable.

Circulated Water baths have a wide range of applications in various fields, including biomedicine, life sciences, and industry. They are also commonly used in commercial kitchen cooking methods like Sous Vide. Some specific applications of circulated water baths include sample thawing, bacteriological examinations, reagent warming, coliform determinations, and microbiological assays.

The tank is pressed stainless steel, which features seamless corners for easy cleaning and no opportunity for bacteria growth or dirty crevices. The temperature is set and controlled by the addition of the Thermoline TU3 heater circulator (sold separately), which is neatly mounted on a bridge across the top of the bath. 

Also available in the circulated bath range is the TWB-24D-CP, which incorporates its own built-in circulating pump. The pump is mounted under the tank, draws water in at one end of the bath, and pumps it through to the other. This encourages a gentle flow across the heating element, giving better temperature uniformity and quicker recovery times than uncirculated baths.

Technical Data

  • Brand
  • Capacity
    12L - 24L
  • Models Available
  • Temperature Range
  • Electrical


At Thermoline, we strive to supply helpful customer support to ensure that you get the most out of our products. We are committed to providing whatever support our customers need, wherever they are in the world. If you can't find your solution in the below FAQs or Knowledge Base, please contact our friendly support team.

How do I control temperatures at or below ambient?
To achieve temperatures at or below ambient will require refrigeration of the bath. Thermoline has a wide range of refrigerated water baths to suit your needs. The TU3 is a heat-only device that controls temperatures +5°C above ambient temperature.
What are different types of water bath?

Some of the water baths that Thermoline Scientific supplies include:

  1. General-purpose uncircuated water baths: These are basic water baths that are suitable for a variety of laboratory applications, including warming samples and incubating cultures.

  2. Circulating water baths: These water baths have a built-in pump or external TU3 heater circulator that circulates the water to maintain a constant temperature throughout the bath. They are commonly used in applications that require precise temperature control, such as PCR amplification and protein denaturation.

  3. Shaking water baths: These water baths have a shaking platform that allows for agitation of samples during incubation. They are commonly used in applications that require mixing, such as bacterial culture growth and hybridisation.

Should I use an uncirculated laboratory water bath or a circulated laboratory water bath?

The choice between using an uncirculated laboratory water bath or a circulated laboratory water bath depends on the specific requirements of your experiment or application.

An uncirculated water bath can be suitable for certain applications, such as when you need to maintain a consistent temperature in a sample or material that is not sensitive to temperature variations or if your sample is prone to be 'knocked over' by water currents due to its weight and shape. However, a circulated water bath is preferred for most laboratory applications because it provides more consistent and uniform heating.

A circulated water bath typically has a built-in pump that circulates water throughout the bath, ensuring a more even temperature distribution.