How does a fire alarm system work

How does a fire alarm system work?

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Fire is a threat to which we do not compromise. That is the reason the installation of alarm devices is now compulsory in dwellings as in professional premises. Notably, it is necessary for establishments open to the public. Equipping your home or business with an alarm system is a great idea to guarantee your safety. It’s an ideal way to protect your loved ones, your employees, and your most precious possessions! It is still necessary to choose the right one: wired, wireless, fire, anti-intrusion. In this article, we’ll discuss how a fire alarm system works.


A fire alarm is a security system built around two components, detection and security. It is a device made to detect and inform the presence of a fire. Consequently, the emergency services can be alerted, and people can move to a more secure location.

The fire alarm designed to detect and inform the presence of a fire quickly. So that those present can take shelter and notify the emergency services. The alarm system based on a series of devices that work together to perform this dual mission of detection and information.

Elements of a fire alarm

First, the components for detection, they activate the alarm system directly. Most often, smoke detectors used, sometimes called DAAF or Autonomous Smoke Alarm Detector. They are equipped with photoelectric sensors, whose role is to detect the presence of smoke in the ambient air thanks to their opacity. In some situations, heat detectors are vital to supplement the functions of smoke detectors or replace them if they are not ideal solutions. Such as they’re not suitable in the kitchen, bathroom, or living room with a fireplace. The reason is that in these rooms, a smoke detector triggered inappropriately.

Initially, the components dedicated to detection will trigger the alarm system. These are most often smoke detectors, temperature sensors, or cells.  They have the ability to measure the presence of carbon monoxide in the air. The smoke detector is the most common equipment. Its operation relies on a photoelectric sensor. It can check if there is presence of smoke in the ambient air thanks to their opacity.

How a heat detector works?

The heat detector equipped with a temperature sensor; for a temperature exceeding 54°C in the room, an alarm goes off. Its sound power of 85 decibels quickly alerts those present. There are two types of heat detectors. Those that analyze the fixed temperature, once it reaches a certain level, the devices are triggered. And another range works thanks to the rate of heat increase. Once the temperature reaches a high value relative to the room average, the alarm will go off.

Fire alarm: detection and warning

The fire alarm can also be triggered manually. Establishments open to the public, for example, have red boxes in the form of switches that are dedicated to this use. Alarm systems for Verisure individuals can also be used to report the occurrence of a fire using the SOS button.

After the alarm is triggered comes the information. The objective here is to visually or audibly report the appearance of flames or smoke. It will warn all those present to evacuate the premises or take shelter. The components of a fire alarm most often have a siren. It immediately starts to sound in the event of an alert. Depending on the equipment, the audible siren also goes along with a warning light signal.

Fire Alarm imperative for companies

The fire alarm is compulsory in professional premises or businesses, considered as spaces open to the public. Here too, it aims to report a possible disaster through the combined action of manual detectors and triggers.

The fire alarm does not prevent the appearance of fire. However, it does significantly limit the damage that results from it by promoting rapid evacuation. It also improves the prompt intervention of firefighters or emergency services when integrated with a global alarm system.

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