A fire alarm system is a set of electronic devices that work together to detect the presence of fire or smoke and alert people through various audio and video appliances. These alarms may be initiated by both manually and automatically actuated devices. Fire alarms are crucial because they save lives.

Devices for manual fire alarm activation include; fire alarm boxes, pull stations, break glass stations and call points or buttons. These are usually installed near exits, are easily identifiable and operated.

Automatic fire detection systems use electronic sensors to detect fire, heat and smoke. Their main function is to detect any physical changes associated with fire and provide an early warning. When used along with a proper emergency response and evacuation plan, damage, personal injuries and even death can be reduced significantly.

Here are the common types:

1. Smoke detectors detect both visible and invisible smoke particles.

a. Ionization detectors contain a small radioactive source, which charges the air inside a small chamber. This charged air allows a small current to pass through and complete an electrical circuit. When smoke is detected, it stops the current and triggers an alarm.

b. Photoelectric detectors has a light source and light sensors that are arranged in a way that the rays from the light source do not hit the sensors. When smoke is detected, some of the light get redirected to the sensor and triggers an alarm.

2. Heat detectors are used in environments where dense smoke is produced. They react to temperature change so when a sharp increase is detected, the alarm gets activated.

3. Flame detectors look for specific types of light produced during combustion: infrared, visible or ultraviolet. When any of these light forms are detected, the alarm sets off.

Fire alarm systems can be installed in almost any commercial buildings. It takes a lot of time and money to recover from the damages a fire can cause. Prevent damage, injuries and damage by installing fire safety alarms.