MMR Technologies, Inc.

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MMR Technologies was founded in 1980 by Professor William A. Little to further develop the micro-miniature refrigerator technology he had invented at Stanford University. His innovative technology fabricated miniature gas refrigerators on glass substrates using a proprietary and patented photolithographic process. In the mid-1980s the company began developing a new type of refrigeration system for cryo-electronics using multi-component, mixed gas refrigerants as the cooling agents. In 1994 MMR was awarded a major contract by the Naval Research Laboratory in Washington for the development of a low-cost cryocooler for cryoelectronics. This program was highly successful, resulting in the commercialization of MMR's popular "Kleemenko Cycle" coolers. These low-cost, extremely reliable, closed-cycle cryogenic coolers are now used worldwide for the cooling of X-ray detectors, low noise amplifiers, medical devices, in the liquefaction of nitrogen and in numerous other applications.

MMR developed a cryocooler for operation at 80K (-193° C) for the cooling of germanium photon detectors. MMR manufactures this “X-Cooler" under an exclusive agreement for the ORTEC division of AMETEK. These detectors, which previously had been cooled with liquid nitrogen, are used for X-ray and gamma-ray detection and monitoring of the movement of radioactive materials.

MMR has a similar agreement with EDAX, another division of AMETEK, for the manufacture of X-Coolers for cooling Si(Li) detectors. This special type of X-ray detector used in scanning electron microscopes had also been previously cooled with liquid nitrogen. MMR has licensed a related technology for cooling computer chips in workstations, computers and semiconductor test systems to KryoTech, a spin-off from the NCR division of AT&T. Using this technology, KryoTech now supplies chip-testing handlers to many of the major semiconductor manufacturers.

In a joint effort with FemRx, MMR developed a cryosurgical device for the treatment of endometrial bleeding in women. The FDA subsequently approved the device for general surgery, dermatology, neurosurgery, thoracic surgery and other areas of medicine. FemRx was later acquired by Ethicon, a Johnson & Johnson Company, and MMR has obtained a far-reaching patent on the device. Extending its cryogenic technology, in 2003 MMR introduced an innovative inoffice liquid nitrogen generator at the American Academy of Dermatologists' annual meeting. Designated the Elan2™, this stand-alone nitrogen liquefier is about the size of an office water cooler and produces six liters of liquid nitrogen per day in a normal office or laboratory — out of "thin air." The unique device is now in production and receiving wide acclaim. See our Elan-2 website:

Over thirty years since he founded the company, Dr. Little now serves as Chief Technology Officer and Chief Executive Officer of MMR. The company currently produces several families of instruments built upon its proprietary micro refrigerator technology. These are widely used in universities, research laboratories and industrial applications — for solid-state characterization, materials research, biological and medical research, and more.

MMR Technologies%e2%80%a6 the World%e2%80%99s Resource for Variable Temperature Solid State Characterization for more than three decades!  Configurable%2c modular%2c flexible%2c dependable solutions!

What’s new

  • Mmr 65x72

    Introducing the new digital controllers: K2000 and SB1000!

    Products | 22 Nov 2013

    MMR Technologies is proud to introduce two all-new digital controller systems  for use with the turnkey Seebeck Effect Measurement Systems,  Variable Temperature  Microprobe Systems and options for Optical and Microscope Temperature Control  Systems.**

  • Mmr 65x72

    Joule-Thomson Temperature Stages

    Products | 8 May 2013

    When a non-ideal gas expands from a high pressure to a low pressure, there is a temperature change even though no other work is being done by the gas. This is the Joule-Thomson expansion of gas.

  • Mmr 65x72

    Model K20XR-x

    Products | 8 May 2013

    The Model K20XR-x (x = 0, 2, 3, 4, 5, 6) is a compact x-ray diffractometer thermal stage designedfor variable temperature studies of solid and powder samples in a variety of x-ray diffractometersystems.

  • Mmr 65x72

    Bio 085 Closed-Cycle Kleemenko

    Products | 8 May 2013

    The Bio 085 Closed-Cycle Kleemenko Cooler is a low cost, zero maintenance, benchtop cryogenic refrigerator system designed for the storage of frozen tissue, cell cultures, organs and body parts.

  • SEM Thermal Stage System

    Products | 8 May 2013

    MMR Technologies’ SEM Cold Stage System, Model K2600, is designed to mount on the specimen stage of a scanning electron microscope to facilitate the study of samples at precisely controlled temperatures from 80K to 730K, without the need for LN2 or other cryogens.

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