4 K Cryocoolers — SHI 1.5 W at 4.2 K
These Sumitomo RDK-415D systems provide 1.5 W of cooling at a temperature of 4.2 K at the second stage and can reach a minimum temperature of 3 K (with no parasitic or experimental heat loads). Compact water- or air-cooled compressors and 20 m long flexible gas lines complete the refrigerator package. (Please see our compressors page for more information.) Designs incorporating both refrigerator and cryostat are available for a variety of applications.
- Larger capacity of 1.5 W at 4.2 K
- Orientation independent
- Push-button operation
Download the RDK-415D drawing and typical load map (224 KB).
Cold Head Model RDK-415D Specifications
|Refrigeration cycle||Modified Gifford-McMahon|
|50 Hz||1st stage: 35 W at 50 K; 2nd stage: 1.5 W at 4.2 K|
|60 Hz||1st stage: 45 W at 50 K; 2nd stage: 1.5 W at 4.2 K|
|Orientation||Any — cooling capacity loss: maximum 15%|
|Weight||Approximately 18.5 kg|
|Dimension||180 D × 294 L × 557 H (mm)|
|Maintenance interval||10,000 h|
|Flexline length||20 m*|
|Flexline weight||7.5 kg per line|
|Compatible compressor unit model||CSA-71A, F-70L, F-70H|
|* Buffer tanks + 6 m flexlines may optionally be substituted for the 20 m long lines. 6 m flexlines weigh 5 kg per line.|
Specifications subject to change without notice.