Laboratory Refrigerators and Freezers for Cold Storage
Laboratory chillers and heaters are temperature-control instruments used to cool or heat circulating fluids, vessels, and laboratory equipment for reactors, condensers, analytical instruments, and process temperature control. Product types include recirculating chillers, heated and refrigerated circulators, immersion coolers, heating mantles, induction heaters, and dynamic temperature control systems.
MBP supplies laboratory refrigeration equipment for research labs across the United States, Canada, and internationally, with US order processing in Houston, Texas. Request a quote by contacting customerservice@mbpinc.net.
Refrigerators & Freezers
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What Are Laboratory Refrigerators and Freezers?
Laboratory refrigerators and freezers differ from domestic appliances by providing more precise temperature control, improved temperature uniformity, and faster recovery after door openings. Laboratory-grade units use high-performance refrigeration systems, forced-air circulation, and microprocessor-controlled temperature regulation to maintain stable storage conditions for sensitive materials. Laboratory refrigerators typically maintain 2–8 °C for enzymes, reagents, vaccines, and other temperature-sensitive samples, while laboratory freezers provide frozen storage at approximately −20 °C. Ultra-low temperature (ULT) freezers operating to −86 °C are used for long-term storage of cell lines, tissues, nucleic acids, and other temperature-sensitive biological materials. Select the appropriate storage temperature and equipment based on sample requirements and applicable regulatory standards.
What You Will Find:
- Ultra-low temperature (ULT) freezers with high-performance engineered for optimal thermal stability and prolonged sample integrity.
- Sophisticated digital controllers featuring real-time tracking and sound alerts to ensure your inventory is secure around the clock.
- Upright and chest arrangements that save space while optimizing storage capacity without cluttering your work area.
- Robust insulation and industrial-grade door seals to preserve internal temperatures throughout hectic lab hours.
How to Choose Laboratory Cold Storage
Temperature category
Laboratory refrigerators (2-8 degrees C) are used for short-term storage of enzymes, antibodies, culture media, vaccines requiring refrigeration, and non-frozen reagents. Standard laboratory freezers (-20 degrees C, manual or auto-defrost) are used for DNA, RNA, PCR enzymes, antibodies, and chemical reagents stable at -20 degrees C. Low-temperature freezers (-40 degrees C) and ultra-low temperature freezers (-80 to -86 degrees C) are required for cell lines, primary cells, patient-derived biological material, long-term nucleic acid repositories, and compounds that degrade in repeated freeze-thaw cycles at -20 degrees C.
Manual defrost vs. auto-defrost
Auto-defrost (no-frost) freezers run a brief heating cycle every 6-24 hours to melt frost on the evaporator coils; this introduces a temperature rise of 3-8 degrees C that thaw-sensitive samples should avoid. Manual-defrost freezers maintain a more stable temperature without defrost cycling but require planned defrost events every 3-6 months with temporary transfer of contents to a backup unit. For samples sensitive to temperature fluctuation (cell lines, frozen RNA, virus stocks), manual-defrost or frost-free units with advanced thermal buffering are preferred.
Explosion-proof and flammable-material storage
Standard laboratory refrigerators and freezers contain internal spark sources (light switches, thermostat contacts, motor brushes) that can ignite flammable vapor-air mixtures. Storing flammable solvents, alcohols, or volatile chemicals in standard laboratory refrigerators is an OSHA and NFPA safety violation. Explosion-proof or flammable-material-safe refrigerators (sometimes called spark-free units) have all spark sources isolated outside the cabinet or in vapor-proof enclosures and are required for storing ethanol, methanol, acetone, and similar chemicals.
Temperature monitoring and alarming
All laboratory cold storage units storing critical samples (vaccines, biological specimens, cell lines) should be equipped with continuous temperature monitoring and alarming. High/low temperature alarms, door-ajar alarms, and power failure alarms with audible and visual indicators are standard on lab-grade units. Remote monitoring via Wi-Fi or USB data loggers with NIST-traceable probes and cloud-based data logging supports CAP, CLIA, and cGxP documentation requirements. Calibration of temperature monitoring systems at least once every 12 months with ISO 17025-traceable standards is commonly required.
Energy efficiency
ENERGY STAR-certified laboratory refrigerators and freezers meet EPA energy consumption benchmarks; ULT freezers at -80 degrees C are the largest energy consumers in many research labs, with a power draw of 10-20 kWh per day per unit. Newer ULT models using hydrocarbon or CO2-based refrigerants, variable-speed compressors, and advanced insulation reduce energy consumption by 30-50% compared to older CFC-based designs.
Specifications Context
Laboratory refrigerators maintain spatial temperature uniformity of plus or minus 1-3 degrees C within the cabinet; standard domestic refrigerators have no uniformity specification and commonly vary by 5-10 degrees C between door shelves and rear compartments. ULT freezers use cascade refrigeration systems with two-stage compressors: a high-stage compressor using HFC refrigerant precooling to -40 to -50 degrees C, followed by a low-stage compressor using HFC or HC (hydrocarbon) refrigerant cooling to -80 degrees C. In the event of compressor failure, ULT cabinet temperature rises approximately 1 degree C per minute with the door closed; CO2 or liquid nitrogen (LN2) backup systems inject cryogen when cabinet temperature rises above a preset alarm threshold, providing hours of protection while repair is arranged.
Browse our complete cooling selection and contact the MBP team for a welcoming quote now.
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