In hospital environments, purification engineering is applied to medical facilities such as operating rooms and intensive care units. By using air purification technology, the air in the operating room is circulated, filtered, disinfected, and sterilized.

Purification engineering mainly involves controlling the cleanliness and temperature and humidity of the atmosphere that products (such as silicon chips) come into contact with, to ensure that products can be produced and manufactured in a good environment.

Timer, anesthesia timer, surgery timer, and general clock timer are used for both hour, minute, and second timing. They are clearly labeled and equipped with a timer controller, and can automatically turn on the battery in case of power outage, with a distance of 2 meters from the ground.