CCG-4K series closed cycle thermostat, with closed cycle refrigerator, built-in heater and sensor with external temperature control instrument to achieve temperature change and control of low temperature thermostat。CCG-4K series closed cycle thermostat可提供了从<4K到325K连续变温，为低温科学实验提供了极大的便利。

  The CCG-4K features a top-loading sample rod design that allows for quick sample changes without bringing the entire system back to room temperature when a sample needs to be changed。The sample chamber is completely in the exchange gas (helium) to cool more evenly, convenient to cool liquid, powder and other samples that are not easy to cool。In order to meet the electrical testing needs of customers, the cryothermostat can be configured with various electrical leads (such as Ph-Br wire, coaxial cable and tricoaxial cable, etc.), resistance sample holder or probe sample holder according to the experimental needs。The thermostat is optically configurable and allows users to select a wide range of window materials for a wide spectrum of tests from far/mid-infrared, ultraviolet to X-rays。

System features:

• Wide temperature range: 4K to 325K
• Sample in static exchange atmosphere
• Large sample space, can be paired with a variety of sample types to test a variety of film, block, powder and liquid samples
• Aluminum vacuum cover and radiation shield, segmented design, easy to change samples quickly
• Optical enclosure with standard 4 optical window viewing range (38mm) or non-optical vacuum enclosure 
• Equipped with temperature control system
• Support standard optical sample base, powder sample base, liquid sample base resistance sample base, probe sample base and resistance sample base, a variety of sample base to choose from
• Sample room with top loading sample rod design, easy to change samples
• Vacuum cover reserved blind plate, optional electrical measurement configuration (such as SMA, BNC, triple coaxial, multi-needle electrical vacuum feedthrough phosphorus copper wire, very fine coaxial line, semi-rigid microwave cable, etc.)
• Optional optical configurations Add optical Windows with the right window materials for a wide spectrum of tests from far/mid-infrared, ultraviolet to X-rays。

Parameters and indicators: