Closed-loop thermostat
The 1.5K series closed-cycle cryostats offer continuous temperature control from 1.5K to 325K. They feature ample sample space and can be fitted with a variety of sample holders, enabling testing of a wide range of thin films, bulk materials, powders, and liquids. The aluminum vacuum housing and radiation shield feature a segmented design for fast sample changes. Equipped with a closed-cycle refrigerator, the built-in heater and temperature sensor work in conjunction with an external thermostat to achieve temperature control.
Due to the scarcity of helium resources, the country has long relied on imports. The United States, a major helium producer, considers it a strategic reserve and restricts its export, leading to a continuous rise in liquid helium prices. This price increase, coupled with import restrictions, has severely impacted the progress of scientific research. Consequently, the closed-cycle refrigerator was born. Its most notable feature is that it eliminates the need for expensive refrigerants, significantly reducing the cost of achieving low temperatures. Closed-cycle thermostats have become the most commonly used sample cooling system in laboratories.
Our 1.5K series closed-cycle thermostats feature a closed-cycle refrigerator. Built-in heaters and temperature sensors work with an external thermostat to achieve variable temperature control. These 1.5K series closed-cycle thermostats offer a continuous temperature range from 1.5K to 325K, greatly facilitating low-temperature scientific experiments.
Our top-loading sample holder design allows for quick sample changes without returning the entire system to room temperature. The sample chamber is completely immersed in the exchange gas (helium), resulting in more uniform cooling and convenient cooling of difficult-to-cool samples such as liquids and powders. To meet customers' electrical testing needs, the cryostat can be configured with various electrical leads (such as Ph-Br wires, coaxial cables and triaxial cables, etc.), resistor sample holders or probe sample holders according to experimental needs. The cryostat can be configured with optional optical configurations and supports users to select a variety of window materials to meet the testing of a wide spectral range from far/mid-infrared, ultraviolet to X-ray.
• Wide temperature range: 1.5K to 325K
• Samples are placed in a static exchange atmosphere
• Large sample compartment accommodates a variety of sample holders, allowing testing of a wide range of thin films, bulk materials, powders, and liquids
• Segmented aluminum vacuum housing and radiation shield for quick sample exchange
• Optical housing with four standard optical windows (38mm viewing area) or non-optical vacuum housing
• Equipped with a temperature controller system
• Supports standard optical, powder, liquid, resistor, probe, and resistor sample holders; a variety of sample holders are available
• Top-loading and removable sample holder design facilitates sample replacement
• The vacuum housing features a blind panel for optional electrical measurement configurations (such as SMA, BNC, triax, multi-pin electrical vacuum feedthrough, phosphor copper wire, ultra-fine coaxial cable, and semi-rigid microwave cable).
• Optional optical configurations include additional optical windows. With the appropriate window materials, testing can be performed over a wide spectral range, from the far/mid-infrared to the ultraviolet to X-rays.
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Closed-loop thermostat
The 4K series closed-circuit thermostats offer a wide temperature range from 4 K to 325 K (500 K or 800 K optional). Samples are kept in a vacuum and cooled by heat conduction. They feature ample sample space and can be combined with a variety of sample holders to test a variety of thin films, bulk materials, powders, and liquids. Four optical windows are standard.
Continuous Flow Thermostat
The continuous flow thermostat can achieve a wide temperature range: from 4K to 450K, and can reduce the temperature to ~2K. The sample is in a vacuum and is cooled by heat conduction. The sample space is large and can be equipped with a variety of sample holders to test various thin films, blocks, powders and liquid samples. The refrigerant consumption is low. Using liquid helium to cool from room temperature to 5K only consumes 0.4L of liquid helium, and using liquid nitrogen to maintain 80K consumes 0.1L/h. It comes standard with 4 optical windows.
Liquid nitrogen storage thermostat
Liquid nitrogen storage cryostat offers a wide temperature range from 78 K to 500 K (800 K optional, with pump-down down to ~65 K). Samples are cooled in a vacuum using heat conduction. The large sample compartment accommodates a variety of sample holders, allowing testing of a wide range of thin films, bulk materials, powders, and liquid samples. The 0.4 L liquid nitrogen storage capacity maintains low temperatures for up to 5 hours, and liquid nitrogen can be refilled without disrupting the experiment.