Products

4 K Closed Cycle Refrigerator Systems from Janis and SHI

Sumitomo (SHI) 4 K Refrigerator - RDK-205D (0.5 Watt @ 4.2 K)

Overview

These systems provide 0.5 Watts 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 0.5-Watt systems employ a smaller compressor and cold head than the 1-Watt systems. The compressor is available in a water-cooled version only, in conjunction with 10-meter long flexible gas lines.

Standard Configuration

These systems provide 0.5 Watts 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 0.5-Watt systems employ a smaller compressor and cold head than the 1-Watt systems. The compressor is available in a water-cooled version only, in conjunction with 10-meter long flexible gas lines. (Please see our Compressor page for more information.

Click on button to enlarge view of mechanical drawing of RDK-205D coldhead, Sumitomo, SHI, Janis Research, 4 Kelvin closed cycle refrigerator systems, cryogenic equipmentEnlarge

RDK-205D Mechanical Drawing

Click button to enlarge view of RDK-205D cryocooler typical load map (60 Hz), Sumitomo, SHI, Janis ResearchEnlarge

RDK-205D Typical Load Map (60 Hz)

Click button to enlarge view of RDK-205D cryocooler typical load map (50 Hz), Sumitomo, SHI, Janis Research, cryogenic equipmentEnlarge

RDK-205D Typical Load Map (50 Hz)

Characteristics:

  • Refrigeration Capacity 0.5 W @ 4.2 K
  • Orientation Independent
  • Push-button Operation

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Specifications

COLD HEAD MODEL RDK-205D

Refrigeration Cycle Modified Gifford-McMahon
Refrigeration Capacity
(Vertical Position)
50 Hz 1st stage: 3 W @ 50 K
2nd stage: 0.5 W @ 4.2 K
60 Hz 1st stage: 4 W @ 50 K
2nd stage: 0.5 W @ 4.2 K
Orientation Any - Capacity Loss: Max 20%
Weight Approximately 15 kg
Dimension 180D x 294L x 512H (mm)
Maintenance Interval 10,000 Hours
Flexline Length 10m
Flexline Weight 7 kg per line
Compatible Compressor Unit Model CKW-21

Specifications subject to change without notice.

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