When there is a fire, the smoke will cause hypoxia of the human body. When the smoke reaches a certain concentration, the human body will have difficulty breathing due to lack of oxygen. When the smoke enters the lungs, it can cause death by suffocation due to its weakened ability to combine oxygen and carbon dioxide. When smoke enters the body through the respiratory system, it raises the awareness of respiratory diseases. To protect people's health and safety, smoke detectors were created. Smoke detector is to monitor the concentration of smoke to achieve fire prevention, it is a kind of advanced technology, stable and reliable detector and is widely used in a variety of fire alarm systems. So let's learn what smoke alarms can do.