Food is kept in the home and shops in refrigerators and freezers so that it is not spoiled by bacteria and other microorganisms. The low temperatures do not destroy these pathogens but inhibit their growth that is already present in the food. Deep freezers are also commonly used in restaurants and supermarkets to preserve raw food for a long period.
For medical applications, ultra-low temperature freezers are designed for the safe storage of vaccines, blood, plasma, biological products, human samples, at temperatures in the range of -10°C to -86°C. The ultra-low freezers are equipped with high-performing cooling systems that ensure temperature uniformity, reliability, and energy efficiency. Most ultra-low temperature freezers are declared as medical devices.
Laboratories, hospitals, and pharmacies depend on these units to store critical drug and biological products. These appliances ensure such temperatures that extend the storage life of these products. Household freezers will not work in these applications as they can not achieve the required temperatures and other features that are essential for medical freezers.
The ultra-low temperature freezers are designed and constructed using stainless steel insides and the outer chamber is made of mild steel and coated with a bright color or chrome plating. The manufacturers of ultra-low deep temperature freezers are available with different specifications such as models with different capacities, fine temperature control, digital locks, control panel, etc. These freezers are used to store viruses, bacteria, vaccines, biological tissues, drugs, blood products, and other biological materials, etc.
These freezers have a higher upfront cost, however, they provide a better investment over time compared to domestic units. They use higher-quality materials and have a longer time between failures and rare temperature excursion events.
The U.S. Centers for Disease Control defines these ultra-cold freezers as medical appliances. These machines have several differences as compared to ordinary household freezers. Unlike domestic freezers, medical-grade appliances have a microprocessor-based system that measures temperatures very accurately. They use digital sensors to monitor interior temperatures. These devices have a very fast response time to variations of temperatures.
CDC forbids the use of commercial and domestic refrigerators to store vaccines since these appliances have unreliable temperature measurement systems. Instead, only stand-alone, medical-grade refrigerators and freezer units can be used for such purposes.
The vaccines stored in a medical-grade refrigerator or freezer are specially designed to hold biological products. Since these refrigerators do not store food items, they will be opened much fewer times by staff members during the day. Some medical-grade appliances have glass doors that allow health care workers to locate items inside the appliance even without opening the door. It helps maintain the unit’s temperature as the door is open for a lesser time.
Using medical-grade appliances is critical because they help providers maintain a reliable cold chain. They use temperature-controlled storage areas and distribution networks that protect vaccines, blood products, and biological material. A cold chain also extends the life of living organisms. Medical freezers also have powerful compressors that can reach target temperatures quickly and can maintain them very accurately. Their doors also have a tighter seal than their domestic counterparts.
Temperature excursions are extremely undesirable storage conditions that require immediate action. Such undesirable incidents destroy the stored biological products and vaccines. Any temperature reading outside of the manufacturer’s defined range for vaccines is a serious event. Most pharmaceutical-grade appliances have an external temperature monitoring facility. This allows staff to track internal temperatures without opening the appliance’s door. Many freezers also have alarm systems that sound when temperatures go outside of their recommended ranges, so the staff can take immediate remedial action.
Medical-grade appliances are designed to have large airflow within their compartments. They have powerful, fan-forced air circulation systems with air-cooling vents. They use wire shelves with perforated ventilation holes so that air circulates efficiently and maintains uniform temperatures.
Many medical freezers have digital locks that allow access to only authorized staff members. Power failures can damage biological products or vaccines. Most facilities have an on-site generator, and or battery backup systems that prevent the need to transport the stored products to an alternative storage facility during a power outage.
These freezers come with detailed temperature data recording systems which ensure that all the contents are guaranteed to have remained under a particular temperature during the entire storage time.
If you need to calibrate or check your freezer temperature controls please contact e2b calibration. We are an ISO/IEC 17025 accredited calibration laboratory and have the necessary expertise to test and calibrate temperature controls of your ultra-low temperature freezers. Our verifiable services are unmatched in the industry. We are registered with ANAB. We are also ANSI/NCSL Z540-1-1994 certified. We have the NIST Traceable Wide scope of ISO/IEC 17025 accreditation. Please contact e2b calibration for more information.