10 K Cryocoolers — Sumitomo (SHI) CH-202 (1.8 W at 20 K) 10 K Refrigerator

These systems provide 1.8 W of cooling at a temperature of 20 K at the second stage (50 Hz) and can reach a minimum temperature of <10 K (with no parasitic or experimental heat loads).

Standard configuration

Please see the compressor page for more information.


  • Refrigeration capacity 1.8 W at 20 K
  • Orientation independent
  • Push-button operation

Download the SHI CH-202 Mechanical Drawing. (This is a secured document and we were not able to rotate the pages. However, while viewing the document, you can right-click on the page and select "rotate clockwise" for easy viewing.)

Download the SHI CH-202 Load Map (50 Hz & 60 Hz).

Janis — a Lake Shore Company
SHI Cryogenics Group CH-202

CH-202 Specifications

Refrigeration cycleModified Gifford-McMahon
Refrigeration capacity (vertical position)50 Hz1st stage: 7.3 W at 77 K; 2nd stage: 1.8 W at 20 K
60 Hz1st stage: 8.8 W at 77 K; 2nd stage: 2.2 W at 20 K
Lowest temperature 2nd stage †<10 K
Cooldown time 2nd stage †50 Hz: <75 min; 60 Hz: <65 min
Cold headAmbient temperature: 4 to 40 °C (40 to 104 °F)‡

Weight: 6.8 kg (15 lb)

Maintenance interval: 13,000 h
CompressorModel: HC-4E1

Weight: 75 kg (165 lb)

Maintenance interval: 30,000 h
Electrical power1-phase; 200, 230/240 V, 50 Hz; 208/230 V, 60 Hz
Power consumption (50/60 Hz)2.6/3.0 kW
Flexline length10 ft
Flexline weight~4.5 lb per line

†Lowest temperature, cooldown time are for reference. (Depending on ambient temperature, cooling water temperature, etc.)
‡Cooling capacity may degrade by maximum 5% if ambient temperature is above 28 °C.
Specifications subject to change without notice.