Laboratory freezers set at -20°C are specialised cooling units designed for the safe storage of biological samples, chemicals, and reagents that require low-temperature preservation. These freezers maintain a consistent temperature of -20°C, which is ideal for preventing the degradation of sensitive materials such as enzymes, proteins, and certain pharmaceuticals. The controlled environment helps preserve the integrity and efficacy of samples, making them suitable for long-term storage and experimentation. Laboratory freezers often come equipped with features such as alarms, temperature monitoring systems, and adjustable shelving to enhance usability and safety. They are essential in research institutions, hospitals, and pharmaceutical companies, where reliable and efficient sample storage is critical for successful outcomes in scientific studies and diagnostics.