Choosing a Polyscience Product for Ambient Temperature

PolyScience produces a broad range of liquid temperature control equipment. Our products are versatile and can be used for various purposes. They are designed to provide consistent heating or cooling in typical temperature ranges.

What's Your Application?

To maintain a temperature that is close to or lower than the surrounding temperature, use a refrigerated product. These include a Recirculating Chiller or a Circulating Bath.

The choice will depend on several factors. The following guidelines will help you determine the type of product and model best suited to your application:

Fluid operating temperature range and set-point
Cooling capacity (heat removal if set-point is near/below ambient)
Ambient temperature (affects cooling capacity)
Temperature stability (we offer choices from ±0.005°C to ±0.1°C)
External application (open or closed-loop determines pump type)
Reservoir size (if a bath is required)
Pump pressure and/or flow rate (if pumping to an external application)
External probe/programmability

Because air-cooled, refrigerated products rely on ambient air to remove heat from the refrigeration system, the ambient air temperature will affect a unit's cooling capacity. As a general practice when selecting a refrigerated product, decrease the product's cooling capacity rating by 1.3% for every 1° that the ambient air temperature exceeds 20°C.

For example, if the temperature around the circulator or chiller is 22°C, the product's cooling capacity will decrease by 2.6%. At set points near ambient, heating products that lack refrigeration will have difficulty maintaining temperature and stability.