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DE-202 Cryocooler Series

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ARS DE-202SF Flat Flange Closed Cycle Cryocooler
DE-202 Valve Motor with "G" orientation for minimzed rotation clearance

The DE-202 is a compact, axially symmetrical, small cooling power closed cycle cryocooler. Its small mass makes it uniquely suited for many manipulator and goniometer applications. This cooler is ideal for small heat loads such as sample cooling in R&D applications. It is available in several geometric variations: customized for rotation in a tight space, UHV, and with extensions to reach deep into a user's equipment. High temperature interfaces and high temperature stability modifications can also be provided.

Download ARS Cryocooler Data Sheet

The following geometric options are available:

DE-202F cryocoolers for OEM sales are sold with a flat flange. These systems can also be equipped with an instrumentation skirt.

DE-202E cryocoolers have an economy instrumentation skirt which is bolted to the flat flange of the cryooler and interfaces with a rubber o-ring. The skirt acts as an interface, where the double o-ring is the sealing suface for the vacuum shroud. The instrumentation skirt comes with a pumpout port along with two additional ports. The one port is an electrical feedthrough for sensors and heaters while the other port is available for expandability.

DE-202I cryocoolers have a high performance instrumentation skirt that is made out of stainless steel and is welded directly to the cryocooler. When teamed with a stainless steel vacuum shroud, a high vacuum sample space of 10-7 Torr can be achieved.

DE-202K cryocoolers were designed to integrate with the Newport Kappa.

The DE-202G was designed to fit into the Huber 512 and 5020, 4 and 6 circle goniometers with a cryostat mount. The small radial clearance of rotation makes it uniquely practical for these applications. The DE-202*G is ideal for many other manipulator applications where rotation of the cooler in a tight space is important.

The ARS manufactured CS-202B is a true UHV cold head (10-11 Torr) where all of the rubber o-ring seals have been replaced with welded joints and metal seals. A CF flange is welded directly to the cryocooler.

Click here to see more Advanced Research Systems cryocoolers.


Standard Components

Options and Upgrades

  • 4 K cold head (0.1 W @ 4.2 K)
  • 5.5 K cold head (1 W @ 10 K)
  • Turbo upgrade for faster cooldown and high cooling power
  • 450 K high temperature interface
  • 800 K high temperature interface

The ARS Advantage

4 K, 6 K, 10 K Fine-Tuned For Your Temperature Range
A Selection of ARS Manufactured Displex Cold Heads

The DE-202SE cold head is a precision machine carefully tuned to achieve temperatures below 4 K with 0.1 W of cooling power at 4.2 K.

The DE-202AE cold head is a rugged workhorse built with power and durability in mind achieving temperatures below 9 K with 0.5 W of cooling power at 10 K.

The DE-202PE cold head is a hybrid of the the 4 K and 10 K philosophies achieving a balance that exhibits the best of both worlds, with temperatures below 5.5 K and 1 W of cooling power at 10 K.

High Temperature Options
800K Interface Manufactured by ARS

Our high temperature interfaces use a unique combination of mechanical and thermodynamic properties to create a high temperature thermal disconnect between the cold head and the sample space. This allows for heating of the sample space far in excess of the maximum 355 K temperature of our cryocoolers.

450 K The Easy Way

Our 450 K interface is a simple semi-permanent addition to the cold tip that expands the upper sample temperature range by 95 K utilizing most of the same instrumentation as our standard cryocoolers.

800 K - Pouring on the Heat

Our specially designed 800 K interface goes beyond the standard techniques to provide a unique system that maximizes thermal conduction at low temperatures while minimizing heat transfer at high temperatures. Beyond the safe operating temperature of silicon diodes, the standard sensors are replaced with E-type thermocouples and platinum RTDs.

Water Cooled Compressor For Your Convenience
The ARS-2HW Compressor

The water cooled ARS-2HW compressor that powers the DE-202 Series cold heads has many benefits that are amplified in small laboratory settings. The water cooling redirects heat energy that would otherwise be dumped into the lab by a large cooling fan. The lack of a large cooling fan also dramatically reduces the noise of these compressors (only 60 dBA). Additionaly with minimum air circulation, the air currents and dust are kept to a minimum. The high efficiency heat exchanger results in low water usage and saves space inside the compressor, giving it a small footprint. When water is not available our Coolpac™ remote recirculation system can send cooling water from up to 100 feet away.

Easy Do-It-Yourself Maintenance
DE-202 Disassembled for Service

The ARS DE-202 Closed Cycle Cryocooler operates on a pneumatically driven Gifford-McMahon refrigeration cycle that is both mechanically simple and robust.

12,000-Hour Maintenance Cycle

Over time the internal components of the cold head begin to wear. Eventually the performance of the cold head will decline and some time after 12,000 hours certain internal components need to be replaced or refurbished. With most closed cycle cryocoolers the only option is to send the cold head back to the manufacturer for service.

A Second Option

The simplicity of the ARS pneumatically driven cryocooler allows for another option. Our customers can purchase a service kit for our 10 K and 5.5 K cryocoolers that replaces all of the worn components. This service kit can be ordered ahead of time and reduce down time to a matter of hours instead of weeks.

Cryocooler Specifications

Cryocooler Model DE-202AE DE-202A(T)E DE-202PE DE-202SE
  Frequency 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz
    Base Temperature < 9 K < 9 K < 9 K < 9 K < 5.5 K < 5.5 K < 4.2 K < 4.2 K
    Cooling Capacity- 4.2 K - - - - - - 0.1 W 0.08 W
  10 K 0.5 W 0.4 W 0.7 W 0.56 W 1 W 0.8 W 1.2 W 1 W
  20 K 2.5 W 2 W 3.7 W 3 W 2.3 W 1.8 W 2.3 W 1.8 W
  77 K 4 W 3.2 W 6 W 4.8 W 3.5 W 2.8 W 4 W 3.2 W
    Radiation Shield Cooling Capacity 10 W 8 W 15 W 12 W 10 W 8 W 10 W 8 W
       (1st Stage Cooling Capacity at 77 K)                
    Maximum Cylinder Temperature 355 K 355 K 355 K 355 K
    Cooldown Time- 20 K 50 min 60 min 35 min 42 min 60 min 72 min 60 min 72 min
  Base Temperature 70 min 84 min 50 min 60 min 90 min 108 min 90 min 108 min
    Weight Expander 7.1 kg (16 lbs) 7.1 kg (16 lbs) 7.1 kg (16 lbs) 7.1 kg (16 lbs)
Compressor Model ARS-2HW ARS-4HW ARS-2HW ARS-4HW
    Standard Voltage Min 208 V 208 V 208 V 190 V 208 V 190 V 208 V 190 V
  Max 230 V 220 V 230 V 210 V 230 V 210 V 230 V 210 V
    Power Usage Singe Phase 1.3 kW 1.2 kW 3.6 kW 3.0 kW 3.6 kW 3.0 kW 3.6 kW 3.0 kW
    Dimensions: L 483 mm (19 in) 483 mm (19 in) 483 mm (19 in) 483 mm (19 in)
  W 434 mm (17.1 in) 434 mm (17.1 in) 434 mm (17.1 in) 434 mm (17.1 in)
  H 516 mm (20.3 in) 516 mm (20.3 in) 516 mm (20.3 in) 516 mm (20.3 in)
    Weight Compressor 62 kg (137 lbs) 73 kg (160 lbs) 73 kg (160 lbs) 73 kg (160 lbs)
    Typical Maintenance Cycle 12,000 hours 8,000 hours 12,000 hours 12,000 hours

Heat Load Map

DE-202 Closed Cycle Cryocooler Family Heat Map

Vibration Levels

DE-202 Closed Cycle Cryocooler Vibration Levels
DE-202*F Flat Flange Closed Cycle Cryocooler

Flat Flange Cold Head

DE-202*E Closed Cycle Cryocooler with Bolt On Instrumentation Skirt

With Economy Bolt on Aluminum Skirt

DE-202*I Closed Cycle Cryocooler with Welded Stainless Steel Instrumentation Skirt

Welded Stainless Steel Instrumentation Skirt

DE-202*B Closed Cycle Cryocooler Designed for True UHV Vacuum Levels

With True UHV Instrumentation Skirt

DE-202*G Closed Cycle Cryocooler Designed for Tight Rotation Clearance

For Small Rotational Clearance

Click on each image for full size

Courtesy of:
Prof. Steve Collins,
Beamline I16 Diamond Light Source


4 K closed cycle cryostat installed on a Newport Kappa Goniometer for x-ray diffraction experiments. This cryostat was fitted with beryllium domes for 2 pi steradian access.