TwinGuard Series Ultra-Low Temperature Upright Freezer


Effective capacity
25.7 cu.ft. | 729 L
Cooling Performance
Down to -86℃

Model MDF-DU702VXC-PA Features

Purpose-Built Cold Chain Storage

PHCbi brand ULT freezers are engineered from the inside out to create, maintain, and restore precise temperatures necessary for long term storage of valuable products. Our purpose-built ultra-low temperature freezers are designed for temperature uniformity and stability not commonly found in household or commercial cabinets.

The MDF-DU702VXC-PA ultra-low freezer provides reliable temperatures as low as -80°C. PHCbi brand TwinGuard ultra-low temperature freezers provide a wider circle of specimen protection through redundant cooling systems based on patented auto-cascade refrigeration technology.

Ultimate Sample Protection

The dual cooling system offers the highest level of sample protection through the use of two independent refrigeration systems that maintain -86°C temperature. The two circuits work together for fast temperature recovery, while the secondary system keeps the temperature at -70°C if a service event occurs. With two independent systems, each sustaining ultra-low temperatures, your samples remain safe. Optional CO2 backup provides and extra layer of protection.

Superior Temperature Uniformity

Redundant auto-cascade refrigeration systems unique to TwinGuard Series achieve superior temperature stability during initial startup and maintain uniformity following routine door openings and throughout the steady state.

Maximized Storage Capacity for Efficient Use of Lab Floor Space

The cabinet and door insulation of TwinGuard Series ultra-low temperature freezers, are constructed using patented VIP Plus thin-profile vacuum insulation to maximize storage capacity and optimize use of floor space. This thin-wall composite insulation includes narrow-profile vacuum panel layers supported by foamed-in-place insulation. The highly efficient insulation also improves temperature stability following frequent door opening and extends warm-up times during power outages.

Intelligent Color LCD Display

Easy to read close-up or from a distance, the high contrast color LCD display allows for easy touchscreen use. The display panel includes comprehensive audible and visual warnings, unit diagnostics, running temperature log and predictive analytics. A USB port makes transferring this logged data to a PC convenient. All performance attributes are displayed and an internal time/temperature log is expressed in graphic form.

Microprocessor Controller and Alarms

TwinGuard ultra-low temperature freezers are managed by a microprocessor-based controller that combines security, monitoring, predictive performance and data logging functions into a single display with password protected menu screens.

Energy Efficient

TwinGuard Series freezers are designed and constructed for peak performance and reliability while maintaining efficient operating costs. An ECO mode provides additional energy savings.

EZlatch Ergonomic Design for Quick Access and Positive Door Closure

The patent pending EZlatch is engineered to tolerate frequent door openings, simplify one-handed access and control frost associated with extreme temperature differentials. The EZlatch, one component of the Advanced Frost Control system, is ergonomically designed to ensure comfortable operation. The Advanced Frost Control system in the TwinGuard series freezer model MDF-DU702VXC-PA combines an additional eight components specially engineered to enhance the performance envelope and ensure sample security, temperature integrity and frost control while extending freezer life.

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TwinGuard Series

PHCbi TwinGuard Series upright and chest freezers provide twice the sample protection for double the peace of mind. Two independent refrigeration systems offer a circle of protection unmatched in the marketplace. Performance down to -86°C is based on integrated complementary refrigeration circuits, robust cabinet design and intuitive smart controls and monitoring. TwinGuard Series freezers are ideal for safe, long term storage of your most high valued products, such as stem cells, embryos, cell lines, rare specimens and other biological materials.

The MDF-DU702VXC-PA Upright -86°C laboratory freezer provides a dual cooling system, maximum storage with minimal footprint, and the EZlatch system for energy efficiency.

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TwinGuard Series Products

Product Photos


EXTERNAL DIMENSIONS 40.6" W x 36.8" D x 78.5" H (1030 x 935 x 1993 mm)*
INTERNAL DIMENSIONS 34.3" W x 23.6" D x 55.1" H (870 x 600 x 1400 mm)
EFFECTIVE CAPACITY 25.7 cu.ft. (729 L)
INTERNAL DOORS 2 insulated; ABS, with stainless steel frames and positive latches
INSULATION Foamed-in-place and VIP Plus vacuum insulated panels: 3.1 in (80 mm)
SHELVES Stainless steel, 3 shelves (adjustable); Inner dimensions:33.6" W x 21.0" D (855 x 534 mm); Load: 110 lbs (50 kg) per shelf
ACCESS PORT 3; upper back wall (back-up system), bottom left (recorder sensor), bottom right (access); Inner diameter: 0.6 in (17 mm)
NET WEIGHT 745 lbs (338 kg)
EVAPORATOR Tube on sheet type
TEMPERATURE CONTROL RANGE -50°C to -86°C in 1° increments (center of chamber, ambient temperature 30°C, no load)
ALARMS High temperature, low temperature, power failure, door ajar, remote alarm, battery life, fan motor life, fan lock, cooling circuit abnormality
COOLING PERFORMANCE Normal operation: -86°C center of chamber (ambient temp. 30°C, no load); Secondary operation: -70°C center of chamber (ambient temp. 30°C, no load)
TEMPERATURE CONTROL SYSTEM Microprocessor, touchscreen data entry, password protected
AREA FOOTPRINT 9.78 ft2 (0.91 m2)
DATA MANAGEMENT Optional with LabAlert Monitoring System
SOUND LEVEL 52 dB(A) (background noise 20 dB(A))
*Exterior dimensions of cabinet excluding handle, rear stand-off brackets and other external projections. Consult Doorway Instructions documentation below for doorway entry instructions, less than 36.8".


MDF-DU702VXC-PA Price Upon Inquiry. Please contact us.


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