4 K Cryocoolers — SHI 0.2 W at 4.2 K

These Sumitomo RDK-101J systems provide 0.2 W of cooling at a temperature of 4.2 K at the second stage and can reach a minimum temperature of about 3.0 K (with no parasitic or experimental heat loads). The 0.2 W systems employ a smaller compressor and cold head than the 1 W systems. Compact water- or air-cooled compressors and 3 m long flexible gas lines complete the refrigerator package.

Standard configuration

Please see our compressor page for more information.


RDK-101J drawing
  • Refrigeration capacity 0.2 W at 4.2 K
  • Orientation independent
  • Push-button operation

RDK-101D cryocooler typical load map 60 Hz

RDK-101D cryocooler typical load map 50 Hz

Lake Shore — environment by JANIS

RDK-101D 4 K CCR

Cold Head Model RDK-101J Specifications

Refrigeration cycleModified Gifford-McMahon
Refrigeration capacity (vertical position)50 Hz1st stage: 3.0 W at 45 K
2nd stage: 0.16 W at 4.2 K
60 Hz1st stage: 5.0 W at 45 K
2nd stage: 0.2 W at 4.2 K
OrientationAny — capacity loss: maximum 30%
WeightApproximately 7.2 kg
DimensionApproximately 442 H × 130 W × 226 L (mm)
Cooldown time (300 K to 4.2 K, 2nd stage)<150 min
Flexline length3 m
Flexline weight4 kg per line
Compatible compressor unit modelHC-4A2, HC-4E2

Specifications subject to change without notice.