TwinGuard | The most secure ultra-low temperature freezers for the storage of high value samples


You love your valuable research, and so do we!

Research drives the world forward. Your research contributes to progress. Progress is not just important today. In the future, we will all rely even more heavily on research and data. We value your research too. Your samples deliver the vital data for that research. Those samples are unique, valuable, and quite likely irreplaceable. They need to be stored safely, for now and the future. Protection is a priority. Losing samples could halt your promising research, delay medical treatments or cause substantial financial losses, as well as create an administrative nightmare. The risk of losing any samples must be eliminated. We developed TwinGuard ULT Freezers specifically to greatly reduce this risk.

Ultimate Sample Protection

The Dual Cooling System offers high levels of protection through the use of two independent refrigeration systems. If one system unexpectedly fails the other can maintain the freezer in the -70°C range.

Efficient Sample Storage

The combination of VIP PLUS vacuum insulation and an enhanced cabinet design with insulated outer door, ensures optimum temperature uniformity, while the reduced wall thickness maximizes storage capacity.

TwinGuard chest freezers maintain an even better temperature stability and uniformity during routine door openings than equivalent upright models as less cold air leaves the freezer while the door is open.

Enhanced Use & Intelligent Security

A colour LCD touch panel allows full user control, even with gloved hands, while the USB port makes transferring logged data to a PC convenient.

The EZlatch door handle on the upright models makes access to stored samples even easier.

When set to ECO mode, the microprocessor controller will establish an overlapping cycle of the two refrigeration systems based on the load status of the freezer, significantly reducing energy consumption.

Valuable Sample Storage

Securely store valuable and irreplaceable samples with the upmost confidence that they won’t be lost in the case of compressor failure.


Flexible Shelf Layout

Multiple shelf configurations are possible in the upright models. These allow a variety of storage options. Organize your samples by transferring your current inventory racks.

Restricted Access Laboratories

Significantly extended time to react to any sudden mechanical failures and data logging are ideal for high security applications such as pathogenic research.

The Safest ULT Freezers for longterm storage of critical biologicals

The TwinGuard ULT freezers where developed to offer ultimate protection for valuable samples such as those in the pharmaceutical and biotechnology sector, research institutes or blood and tissue banks.

Dual cooling system
An advanced Dual Cooling System provides an unparalleled level of safety and added peace of mind through the use of two independent refrigeration systems that reliability maintain an ultra-low temperature environment, even if an unexpected failure should occur in one cooling circuit.

The dual cooling technology differs significantly from conventional cascade refrigeration technology in fundamental design and operation. In dual cooling systems, two independent refrigeration systems provide a reliable -86ºC ultra-low temperature environment.

Should an unexpected failure occur in one cooling circuit, the other can maintain the freezer in the -70ºC range until service can be arranged. This level of ultra-low temperature back-up cannot be achieved by conventional cascade systems.

Would you like to learn more about our Dual Cooling System? Download the Technical bulletin below!

Scientific Applications

  • Temperature sensitive samples such as therapeutics and biospecimens.
  • Samples needing to retain viability such as stem cells, engineered tissue, organs, vaccines, hybrodmas, cancer cells or fibroblasts.
  • Longitudinal study samples.
  • Important medical research samples.
  • Valuable pharmaceutical products.
  • Clinical trial samples.
  • Pathogenic samples within high security laboratories.

TwinGuard freezers at the Pirbright Institute

The Pirbright Institute is a world leading centre of excellence in research and surveillance of animal viruses and zoonotic diseases. First established 100 years ago, as a cattle testing station to combat Tuberculosis, it now plays a vital role in the investigation and control of animal diseases with serious economic and public health implications. As the only specialist animal pathogen facility in the United Kingdom (UK), its work is critical both nationally and internationally.

Having benefitted in the past from a long standing relationship with PHC, the Institute turned to PHC to help equip a new high containment laboratory built at its Main Campus in Surrey. With the purchase of 30 MDF-U700VX TwinGuard -86ºC freezers, the Institute has already seen improvements isample security, workflow and resource efficiency within its new high containment facility.




The full TwinGuard ULT freezer range consists of:

Upright Freezers
Chest Freezers

Innovative cabinet design & flexible shelf layout

Multiple shelf configurations in the new TwinGuard ULT upright models allow a variety of storage options. The innovative cabinet design with chamfered edges reduces the footprint of the freezer, making them ideal for use in multi freezer laboratories.

Organize your samples by using your existing inventory racks or select from the many different rack types we offer. PHCbi’s racks are made of stainless steel or anodized aluminum. The aluminum racks are very light, yet sturdy and corrosion free.



Filterless Design
The filterless construction of the freezers reduces routine maintenance time by eliminating the need for regular cleaning of filters.

MDD Certified
The MDF-DC500&700VX chest freezers and the MDF-DU502VX & MDF-DU702VX-PE upright freezers are certified as a Class IIa Medical Device (93/42/EEC and 2007/47/EC) for medical purposes of storing cells, tissues, organs and embryos.

Uneven interior temperatures can lead to a loss in sample integrity. TwinGuard freezers with uniform, stable temperatures and quick recovery times provide the best protection for your samples, ensuring reliable preservation while guarding against degradation.

Efficient Sample Storage
The use of highly efficient VIP Plus insulation combined with a newly designed refrigeration system layout ensures the most efficient use of space for up to 30% more 2” box storage capacity.

*MDF-DC500VX compared with previous equivalent PHCbi models.

Pricing, Offers & Product Information