A Cryostat (from Cryo meaning cold and State meaning stable) is a device used to maintain low Cryogenic temperature of samples or devices mounted within the Cryo State. Low temperatures may be maintained within a Cryostat by using various refrigeration methods, most commonly using cryogenic fluid bath such as Liquid Helium. Hence it is usually assembled into a vessel, similar in construction to a Vacuum Flask or Dewar. Cryostats have numerous application within science, engineering, and medicine.