These immersion circulators are intended to be used with the Cole-Parmer WBU-200 and WBU-250 series unheated liquid baths or any other suitable laboratory vessels. They are designed to heat, circulate, and precisely control the temperature of the fluid in the bath over a wide range of temperatures. These versatile circulators can be used as a stand-alone liquid bath temperature controller, or as a pump for providing temperature control to an external device*. * Note the high temperature IC-300-20HDC models cannot pump externally. Please Note: To achieve temperatures below ambient, external accessories such as a dip-cooler, or flow cooler are required. Please Note: Effective June 2022, the Techne High-Stability Digital Immersion Circulator Model number FTE10DDC has now been rebranded Cole-Parmer under Model number IC-300-10DDC. All the same great features and specifications, just with a new and improved look.