Highlighting innovative design features and useful application information

It is a common misconception that a bath with a larger reservoir provides greater stability because the addition of heat energy results in a smaller temperature rise, giving it the appearance of better stability than a smaller reservoir. To achieve temperature stability, heat must be accurately removed at the same rate as it is added.

In Fig. 1 you can see that all of the factors important to the temperature stability of your application take place toward the rear of the bath reservoir (heating, cooling, pumping, temperature measurement and control).

When you need (or have) a product that has powerful cooling (up to 800W) and a large reservoir [Fig 1], adding a displacement block will reduce the volume, improving time-to-temperature by leaving more of the cooling or heating capacity for your application – where it counts!

For applications that require up to 500W of heat removal, the optimal solution would be the “bathless” Thermo Scientific Polar laboratory circulators [Fig. 2] that have fast time-to-temperature, a lower cost and a smaller footprint than traditional bath circulators.

“ Excellent control of the heating and cooling is what makes the temperature of the outgoing fluid stable – not the extra volume of fluid that is in the bath reservoir.”

Visit www.thermoscientific.com/tctechlibrary for products brochures and detailed application notes

Figure 1: SAHARA Heated Bath Circulator

Figure 2: Polar Heating/Cooling Recirculating Chiller