4 K Cryocoolers — SHI 0.7 W at 4.2 K
These Sumitomo RDK-205D systems provide 0.7 W of cooling at a temperature of 4.2 K at the second stage and can reach a minimum temperature of about 3.5 K (with no parasitic or experimental heat loads). The 0.7 W systems employ a smaller compressor and cold head than the 1 W systems. The compressor is available in a water-cooled version only, in conjunction with 10 m long flexible gas lines.
Please see our compressor page for more information
- Refrigeration capacity 0.7 W at 4.2 K
- Orientation independent
- Push-button operation
Cold Head Model RDK-205D Specifications
|Refrigeration cycle||Modified Gifford-McMahon|
|Refrigeration capacity (vertical position)||50 Hz||1st stage: 3 W at 50 K; 2nd stage: 0.7 W at 4.2 K|
|60 Hz||1st stage: 4 W at 50 K; 2nd stage: 0.7 W at 4.2 K|
|Orientation||Any — capacity loss: maximum 20%|
|Weight||Approximately 15 kg|
|Dimension||180 D × 294 L × 512 H (mm)|
|Maintenance interval||10,000 h|
|Flexline length||10 m|
|Flexline weight||7 kg per line|
|Compatible compressor unit model||CKW-21*, F-40|
Specifications subject to change without notice.
*Cooling power may be reduced to 0.5 W at 4.2 K.