Cryostat 190 is designed to control the temperature accurately with accurate flow control of cooling nitrogen by mass flow controller and control of the heater which is kept around the sample holder. This system can be installed with FT-IR of many types and other spectrometer. This System includes Cryostat, 10L liquid nitrogen dewar, diaphragm pump (For Liquid Nitrogen flow), temperature controller and KBr windows. Cooling is done by Liquid nitrogen from the 10L dewar (stand-alone) to cryostat, pumped using diaphragm pump then cooling the sample in cryostat.