Laboratory freezers are specialized refrigeration units designed for storing and preserving various samples, reagents, chemicals, and biological materials in a controlled environment. They are commonly used in research laboratories, medical facilities, pharmaceutical companies, and other scientific settings. Laboratory freezers can achieve and maintain temperatures below 0℃, typically down to -20℃ (-4°F), -30 degrees Celsius (-22°F) for general purpose freezers, or even lower, depending on the specific freezer. For example, Ultra-Low Temperature (ULT) freezers provide extremely low temperatures for storage, often below -40℃ or even as low as -80℃. They are used for long-term storage of sensitive biological samples, enzymes, vaccines, and other temperature sensitive materials.