VWR® Ultra-Low Temperature (ULT) Freezers operate at temperatures from -45°C to -86°C and are designed for the long-term preservation of biological samples, cell lines, plasma, serum, vaccines, enzymes, tissue samples, and other temperature-sensitive materials. Available in upright (from 200 L to 700 L) and chest (from 150 L to 500 L) configurations. Key features include: high-efficiency cascade refrigeration system using two compressors for reliable performance, premium polyurethane insulation for energy efficiency, microprocessor controller with digital temperature display, audible and visual alarm system for temperature deviation and power failure, USB or RS-232 data logging for GxP compliance and validation, inner door partitions for reduced temperature excursions during access, and a backup lock and access log for sample security. Hydrocarbon (HC) refrigerant variants available for environmentally responsible operation with zero ozone depletion potential (ODP). GreenCool™ energy management technology reduces power consumption by up to 35% compared to conventional ULT freezers. Validated to meet FDA 21 CFR Part 11 requirements for pharmaceutical and clinical trial sample storage. Essential for biobanking, clinical trials, pharmaceutical manufacturing, and life science research.