Ultra-low freezers, or ULTs, are freezers that can store contents at temperatures as low as -86°C. They are most used in laboratories, hospitals, and research labs to store highly thermosensitive samples and compounds such as genetic material for long durations. For example, biomedical research institutes make widespread use of them because of the extremely volatile nature of their samples, compounds, and final products. Recently, ultra-low freezers have seen more widespread adoption because of the Covid-19 pandemic, as some mRNA-based vaccines require long-term temperature storage at -70°C.

B Medical Systems offers a wide range of ultra-low freezers among its products, varying in storage capacity. The lowest capacity model, the U201, with a storage capacity of 217L, is ideal for small clinics and labs that only need to store small amounts of vaccines or specimens.

The major feature offered by this ultra-low freezer is the flexibility in the operating temperature range. It can reliably store different products at temperatures between -86°C and -20°C, effectively allowing this model to also act as a normal medical freezer if required.