Effective capacity
Cooling Performance


For Stable Long-Term Storage

World’s lowest –152˚C freezer ensures stable cell and tissue preservation

An important factor to consider when preserving cells or tissue at ultra-low temperatures is to prevent amorphous ice crystals from recrystallizing within and outside the cells. Samples that are maintained in an ultra-low temperature freezer at –152˚C which is far lower than the recrystallization point (–130˚C for pure water) can be preserved semi-permanently. Preservation at ultra-low temperatures maintains vitrification without crystallization occurring inside and outside cells.
In contrast to conventional liquid nitrogen preservation containers, freezer preservation has numerous advantages: no sample contamination, Easy maintenance, lower running cost, more usable interior space,as well as no sudden liquid eruptions. On freezer unit a broad alarm system is equipped, and LN2 can be used as an optional back up. Panasonic’s MDF-1156 and 1156ATN make long-term storage below the recrystallization point easier and more stable than ever before.

Cryogenic preservation - 150˚C/-152˚C

An important factor to consider when preserving cells or tissue at ultra-low temperatures is to prevent amorphous ice crystals from recrystallizing within and outside the cells.
Cryoprotectant freezes the cell at a constant temperature; it can vitrificate micro ice crystals by stopping their growth. The re-crystallization point of pure water is -130˚C.
It has been confirmed in a recent study that the re-crystallization point of a mixture of DMSO and other cryoprotectants is -115˚C. With its below re-crystallization point temperature, the -150/-152 degrees Ultra-low temperature freezers enable long-tem preservations of samples easier and more stable than ever before.


In contrast to the conventional liquid nitrogen preservation, freezer preservation has numerous advantages: no sample contamination due to mycoplasma, no sudden liquid eruptions, as well as low operational cost. The preservation temperature of vaporized liquid nitrogen is between -130˚C and -150 ˚C while the Ultra low temperature freezers enable amuch lower temperature of -150/-152˚C.

Steady chamber temperature

The feature of the chest type is the low cold air leakage on door openings, and can keep a steady chamber temperature. Long frozen cell line, DNA, blood, and bone marrow, by high credibility, and precise temperature control.

Specially designed compressor and cascade refrigeration system

Specially designed for rugged ultra-low temperature applications in a laboratory environment (HFC refrigerants only).

Micro-processor temperature control with LED digital display

Extremely accurate, easy-to-read display. The temperature inside the freezer can be set and monitored easily by means of a microprocessor temperature control with an LED digital display. The thermostat incorporates a platinum resistor (Pt. 100Ω), precision and durability.

Integrated cabinet design

High-performance refrigeration system with foamed-in-place cabinet insulation maximizes interior temperature uniformity and protects against fluctuating ambient temperatures.

Hot line for secure sealing

Moisture condensation at the top edges of the cabinet due to differences in temperature inside and out causes frost and icing problems that may reduce heat insulation efficiency and obstruct door movements. These problems are prevented by the “hot line” by means of which hot gas from the higher temperature circuit is circulated through the problem areas.

Self-diagnostic function

The temperature sensor, filter sensor and cascade sensor monitor operation conditions continuously. Should abnormality be picked up, an error code and the current temperature will be displayed in turn.

Ring back function

The alarm buzzer can be silenced by pressing the BUZZER key on the control panel. (The remote alarm signal is not cancelled.) Should the alarm condition continue after a certain suspension, the alarm buzzer sound will resume.

Easy maintenance

Filter check lamp notifys the user of a clogged condenser filter.The condenser filter is situated at the front panel to make filter removing and cleaning easier.

Standard casters and levelling feet

Standard-equipped heavy duty casters make it easy to move a freezer when necessary. The levelling feet keep a freezer level and firm on the floor.

Built-in temperature & power failure alarms (lamp / buzzer)

In case of power failure or an irregular rise in temperature, a rechargeable battery-operated indicator lamp and alarm will be activated. A compact recording unit which automatically records the inside temperature, and a backup system with liquefied CO2 or N2 which is selfactivated when a power outage occurs are also available separately. This equipment helps insure that the contents will be protected in the event of any power failure or mechanical trouble.

  • Crygenic preservation / -152˚C freezers
  • Alarm and safety devices
  • Microprocessor temperature control

Product Photos


External Dimensions 1400 x 800 x 945 (mm) / 55.1 x 31.5 x 37.2 (inch)
Internal Dimensions 500 x 450 x 572 (mm) / 19.7 x 17.7 x 22.5 (inch)
Effective Capacity 128 liters (4.5 cu.ft.)
Exterior Cabinet Galvanized steel with baked on finish
Internal Cabinet Aluminum plate
Doors Inner lid 1
Insulation Foamed-in-place rigid polyurethane
Net Weight 265 kg (584 lbs.)
Compressor High stage side : Hermetic type, 1100 W / Low stage side : Hermetic type, 1100 W
Evaporator High stage side : Cascade condenser / Low stage side : Tube on sheet (shared with interior)
Condenser High stage side : Fin and tube type / Low stage side : Cascade condenser
Refrigerant HFC(R-407D (high stage side), HFC mixed refrigerant (low stage side))
Temperature Control Range – 130 °C to – 152 °C
Temperature Display Digital display
Alarms Selectable high temp. alarm (+ 10 °C & + 15 °C from set point) Power failure alarm, Filter check lamp, Remote alarm contact, Cylinder key on the lid handle
Backup kits -
Accessories 1 set of key, 2 rubber caps, 1 inner lid, 1 scraper


MDF-1156 Price Upon Inquiry. Please contact your local dealers.


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