TwinGuard ULT Freezers (-86°C)


Effective capacity
Cooling Performance


Safe and Secure Extra-Large Capacity Ultra-Low Freezer with Dual Cooling System

Secure storage with new dual cooling system

The Dual Cooling System is newly designed to securely store valuable biological samples. It consists of two individual compressors to provide a reliable -86˚C ultra-low temperature environment. Should unexpected failure occur in one cooling circuit, the other will maintain at least -65˚C.

*Any unexpected failure on either of the single compressor will be alerted.
*The data is a measured example (AT23˚C, 230V/ 50Hz, no load.) Actual power consumption will vary depending on set and ambient conditions loading and local voltage.

Intelligent ECO mode operation

“ECO mode” is an industry first feature. The two compressors, A and B, are independently controlled to optimise operation efficiently to minimise energy consumption by monitoring freezer load status.

*Ambient temperature at 30˚C (-80˚C) *ECO mode’s wave doesn’t settle into pattern. It draws various pattern depends on SV, AT, and usage condition. *The data is a measured example (AT23˚C, 230V/ 50Hz, no load.) Actual power consumption will vary depending on set and ambient conditions loading and local voltage.
Graphic control panel

Central LCD display control panel enhances operability and visibility. Data log function retains operation data for a preset period and the data can be directly transmitted to a PC via MTR-480-PW interface.
*A software must be installed on PC to receive the log data transmission.

The microprocessor has a memory back-up so after a power failure, operation resumes at pre-outage settings. The self diagnostics function will display an error code in the case of abnormality

Data management by logging function
Pass word access
Error messages
High efficiency insulation using V.I.P. technology
MDF-U500VX is equipped with a 6 times stronger thermal resistance VIP PLUS while keeping the same wall thickness but with more rigid foam polyurethane.
User-friendly design

Various alarms including high/low temperatures, door ajar, power failure alarm and part replacement notification help to keep samples safe even in an emergency.

Installation space
The VIP panel reduced the cabinet wall thickness from 140mm to 70mm and achieved nearly 30% more storage capacity than conventionally insulated freezers, all without increasing its footprint.
Improved air seal heat resistance structure

To allow the eco mode, and to reduce the frosting, the chamber has a well sealed structure.

Status Alert

Unconventional operation can cause malfunctions. Function control monitor notifies the unconventional operation to prevent the problems and helps the safe operation.
It always monitors the operation, and the flash lamp notifies the drops in the voltage, an abnormality of the temperature rise when the ambient temp is over 35˚C, lower than approximately 0˚C,and overload operation. It also notifies the time of battery replacement, and the door status.
The status of these alarms and indicators will be shown on the control panel.

Product Photos


External Dimensions (W x D x H) 770 x 870 x 1990 mm
Internal Dimensions (W x D x H) 630 x 600 x 1380 mm
Volume 519 litres
Net Weight 320 kg
Capacity (2” Boxes in Stainless Steel Racks) 352 (2” boxes)
Capacity (3” Boxes in Stainless Steel Racks) 224 (2” boxes)
Cooling Performance -86 °C
Temperature Setting Range -50 to -90 °C
Temperature Control Range -50 to -86 °C
Controller Microprocessor, non-volatile memory
Display LCD digital display with numerical keys
Temperature Sensor Pt-1000
Refrigeration System Independent Dual-Cooling
Compressors 2 x 1100 W
Refrigerant HFC
Insulation Material PUF / VIP Plus
Insulation Thickness -
Exterior Material Painted Steel
Interior Material Painted Steel
Outer Doors/Lid 1
Outer Door Lock Y
Inner Doors/Lid 2
Shelves 3
Max. Load - Per Shelf 50 kg
Max. Load - Total -
Vacuum Release Port 1 (manual)
Access Port 3
Access Port Position back x 1, bottom x 2
Access Port Diameter 17
Casters 4 (2 leveling feet)
Power Failure V-B-R
High Temperature V-B-R
Low Temperature V-B-R
Filter N/A (filter-less)
Door Open V-B
Power Supply Local
Frequency Local
Noise Level 53 dB [A]


Small Inner Door Kit MDF-5ID-PW
Liquid CO2 back-up CVK-UB2-PW
Temperature recorders  
- Circular type MTR-G85C-PE, MTR-G85A-PA
- Continuous strip type MTR-85H-PW
- Recorder housing MDF-S3085-PW (for MTR-85H)


MDF-U500VX Price Upon Inquiry. Please contact your local dealers.


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