Controlled temperature range of 10-150degrees C. The High Temp unit (> 40C) uses halogen lamps for heating to over 100C and a proportional regulating valve for cooling to control the flow rate of circulating liquid and cooling water. The Low Temp unit (10 to 40C) uses thermo-module technology for both heating and cooling. For these units, the re-circulating heating and cooling performs flexible temperature regulation with high speed response.