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Orca™ Mixed Refrigerant Cooler

  • Overview
  • Specifications
  • Drawings
  • Pictures
Mixed Refrigerant Cryocooler     Mixed Refrigerant Cryocooler with Foil
Nickel Plated                          Mylar Wrapped

The ARS-manufactured Orca™ cooler is a mixed refrigerant Joule Thompson cooler. The Orca uses a unique cooling cycle to maintain temperatures of 90 K (-183.15 C) without the use of liquid cryogens.

The Orca system is a low cost alternative to cumbersome liquid nitrogen systems that require constant maintenance. The robust design has no moving parts in the cold head. Only the compressor requires regular 10,000-hour maintenance. The compressor is air cooled and operates at either 115 V or 208 V.


  • Cryogen Free
  • Nonflammable Non-Toxic Mixed Gas Refrigerant
  • JT-Cooler, No Moving Parts in the Cold Head
  • Low Vibration
  • Operates in any orientation
  • Air Cooled Compressor

Standard Components

  • Cold Head (MR-90)
  • Air Cooled Compressor
  • 2 Hoses

Options and Upgrades

Orca TM Specifications

Cryocooler Model MR-90 MR-110 MR-125
    Base Temperature < 90 K < 110 K < 125 K
    Cooling Capacity See heat map below
    Maximum Cylinder Temperature 355 K
    Cooldown Time Base Temperature ~3 hrs
    Weight Expander 7.1 kg (16 lbs)
Compressor Specifications
Frequency 60 Hz 50 Hz
    Standard Voltage 100 V 115 V
    Power Usage Singe Phase 750 VA
    Dimensions L 356 mm (14 in)
  W 483 mm (19 in)
  H 394 mm (15.5 in)
    Weight Compressor 36.3 kg (80 lbs)
    Typical Maintenance Cycle 10,000 hours

Heat Load Map

ORCA MR JT Cooler Drawing

Orca™ MR JT Cooler
Different Flanges Available

Click on each image for full size
Mixed Refrigerant Cryocooler Mount in an Optical Vacuum Shroud

Mixed refrigerant cryocooler mount in an optical vacuum shroud
Mixed Refrigerant Cryocooler Mount in an Optical Vacuum Shroud