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.
Standard configuration
Characteristics:
- 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 | |
| Refrigeration capacity (vertical position) | 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.