Hot air sterilizers, also known as dry heat sterilizers, are medical devices used to sterilize medical equipment and instruments. They work by exposing the items to high temperatures, typically between 160 degree C and 190 degree C, for a specified period of time, usually between 1 and 3 hours. Hot air sterilizers use a heating element to raise the temperature inside the sterilization chamber, and a fan circulates the hot air to ensure that all parts of the items being sterilized are exposed to the heat. The hot air removes moisture from the items, which helps to kill bacteria and other microorganisms by denaturing their proteins and damaging their cell walls.
Hot air sterilization is effective for sterilizing items that can withstand high temperatures and do not contain moisture or other materials that could be damaged by heat. This makes it a useful method for sterilizing items such as glassware, metal instruments, and certain types of plastics. Hot air sterilizers are commonly used in hospitals, clinics, and other medical settings, as well as in research laboratories and industrial settings where sterilization is important. They are preferred in some applications because they do not require the use of chemicals or water, which can be a concern for some types of medical equipment or in certain environments.