An ultra low temperature (ULT) freezer is a refrigerator that stores contents at between −40 to −86 °C (−40 to −123 °F). An ultra low temperature freezer is commonly referred to as a "minus 80 freezer" or a "negative 80 freezer", referring to the most common temperature standard.Low-temperature laboratory freezers can achieve temperatures of about -40° C or lower. Low-temperature laboratory freezers can achieve temperatures of about -40° C or lower. Kitchen freezers, by contrast, operate to about -20° C.ULT freezers are used in biobanking and pharmaceutical laboratories to store protein, DNA, antibodies, small molecules, enzymes and other samples critical for biological research. They store thousands of dollars in products, sometimes for years on end.