4 K cryocoolers — SHI 0.4 W at 4.2 K
These Sumitomo RDK-305D systems provide 0.4 W of cooling at a temperature of 4.2 K at the second stage and can reach a minimum temperature below 3.5 K (with no parasitic or experimental heat loads). The 0.4 W systems employ a smaller compressor and cold head than the 1 W systems. The compressor is available in an air-cooled version only, in conjunction with 10 m long flexible gas lines.
Standard configuration
Please see our compressor page for more information.
Characteristics
- Refrigeration capacity 0.4 W at 4.2 K
- Orientation independent
- Push-button operation
Cold head Model RDK-305D specifications
| Refrigeration cycle | Modified Gifford-McMahon | |
| Refrigeration capacity (vertical position) | 50 Hz | 1st stage: 15 W at 40 K; 2nd stage: 0.4 W at 4.2 K |
| 60 Hz | 1st stage: 20 W at 40 K; 2nd stage: 0.4 W at 4.2 K | |
| Orientation | Any — capacity loss: maximum 15/25% (2nd/1st) | |
| Weight | Approximately 16 kg | |
| Dimension | Approximately 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 | CNA-31C, CNA-31D | |
Specifications subject to change without notice.