The RC4 Refrigerated waterbath when used with an optional immersion heater circulator will provide accurate temperature controlled water at or below ambient temperatures. The waterbath has a capacity of approximately 12 litres. A built in heavy duty recirculating pump provides closed loop circulation at the rate of 7 litres per minute, and can offer a reliable and preferable alternative to the use of mains water for cooling Heat exchangers, Electrophoresis baths, Condensers, etc. To avoid accidental damage to the heat exchanger components the RC4 cooling is set to turn of at 4°c, however it can be factory set to have a minimum temperature of -10°C if required. Suitable additives would need to be added to the water for the -10°c version to avoid damage to the system. Polished grade 304 stainless steel is used for the tank, and surround, and the main case is constructed from a heavy duty plastic. Heat exchanger components are manufactured from copper. Only environmentally friendly R134a refrigerant is used in Ratek coolers.