Due to the scarcity of helium resources in our country, we rely on imports for a long time, and the United States, as a major helium resource country, regards it as a strategic reserve and restricts exports, resulting in rising prices of liquid helium。Such price increases and import restrictions have had a serious impact on the progress of scientific research in our country。So the closed cycle refrigerator was born。Its most typical feature is that it no longer needs to consume expensive refrigerants, so that the cost of low temperature acquisition is greatly reduced。Closed cycle thermostats have become the most commonly used sample cooling system in laboratories。

  CCV-4K series closed cycle thermostat, using a more user-friendly design, especially the sample seat part of the non-standard customization, to meet the samples of different customers in the low temperature vacuum environment of electrical, optical, or photoelectric performance test。Various optical accessories and electrical connectors can be configured to meet the requirements of sample cooling in different experiments。The vacuum housing has a threaded hole at the bottom, matching the bracket mounting flange, which allows the thermostat to be fixed directly to the optical platform。

System features:

• Wide temperature range: from 4 K to 325 K (500K or 800K optional)
• The sample is cooled by heat conduction in a vacuum
• 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
• Standard 4 optical Windows (38mm)
• Equipped with multi-field 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
• Fast cooling down to 5K in 1 hour
• The sample room adopts quick-discharge clamp design for easy sample replacement
• 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.)

Parameters and indicators: