Available with either a turbine or positive displacement pump, these Cole-Parmer recirculating chillers use hot-gas bypass instead of a noisier mechanical modulating value to create strong temperature stability, extend compressor life and improve energy efficiency. Hot-gas bypass re-uses heat removed from your process to maintain temperatures up to 70 °C. Current chillers use a refrigerant with low global warming potential; models using natural refrigerant that have no global warming potential will be released soon.

Self-changing air filter system automatically changes the filter media at user-definable intervals or once a month for a two-year period helping to reduce downtime and maintenance. An easy-to-read large full-color touchscreen display offers a multi-language interface and shows set temperature, actual fluid temperature, fluid pressure, fluid level, air filter status, and timer.

State-of-the-art capacitance liquid level sensor provides continuous monitoring to protect the pump from premature failure. A special noise reduction system makes the chillers extremely quiet while still maintaining optimal temperature control. A UV light biological growth inhibitor eliminates the need for chemical growth inhibitors and prevents algicides from being released into the waterways. Self-diagnostic system allows you to troubleshoot performance issues against data stored on the chiller the day it was manufactured.