Hajj & 'Umrah Relations Department

Permits & Contractors Relations Section

Hajj & 'Umrah Relations Department

Permits & Contractors Relations Section

Phone: 44700000 Fax: 44701192

P.O.Box: 422 Doha - Qatar

In cooperation with the Department of Civil Defense

Hajj & 'Umrah Relations Department Permits & Contractors Relations Section

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Safety and FireDetection SystemsSafety and FireDetection Systems

sible fires might occur, as well as knowing the geography of the place and the conditions surrounding it, and being aware of the typical activi-ties of the locale.

Fourth: Types of detectors.

1) Ionized Gas Detectors are used to detect invisible products of combus-tion: The phenomenon of a fire is understood to occur due to the ioniza-tion of particles that combust. These particles have different levels of equi-librium in the electron, making it incline to stealing electrons from other particles. This detector is used to monitor such activity.

2) Smoke Detectors: These are used to detect visible combustion and employ a photoelectric cell coupled with a specific source of light. This cell consists of a flat disc that trans-fers its light to an electric current.

3) Heat Detectors: Heat is the most abundant byproduct of combustion. It is detected by using certain systems that employ the three principles of heat physics.

4) Light Detectors: These are also called "Flame Detectors", which can be of two main types:

1) Detects the light present in the spectrum of ultraviolet rays

2) Detects the light present in infra-red

Alarm detection systems offer sev-eral other services besides their main purpose, which can be summarized as follows:

• Preventing smoke

• Locking the doors where the fire is contained

• Notifying the fire department

Safety and Fire Detection SystemsSafety and Fire Detection Systems

Safety is a basic condition that every human being seeks to live by. In the struggle to survive, it is only natural that we try to stay as far away as pos-sible from anything that threatens our person and property. Thus, the only way to live a truly happy life is in the shade of safety.

A person is considered to be in a state of safety when he is secure in his home, workplace, when going about his everyday activities and when on the road. To attain this, one must have at least minimal preven-tive awareness regarding the means to achieving security and safety. An alarm system is one of the most important parts of living safely, which is why it is said, "An ounce of preven-tion is worth a pound of cure." Faced with the ever-present possibility of accidents and natural disasters, soci-ety must focus on preventive aware-ness.

First, let us define 'alarm' and the goal of alarm systems and fire detec-tion.

An alarm is a means of notifying people of an existing danger, using one of the various mediums that detect the presence of danger, in order to protect their lives and proper-ties, while taking all necessary prepa-rations.

The main goal of these systems is to get people to respond quickly to the fire. Thus, one is able to transfer this early response into audio-visual signals to alert individuals or groups of individuals present in the building, site, help center, or fire department that there is a fire in its early stages.

Humans can be considered the great-est fire detectors on earth due to the gift Allaah The Almighty has given them in their five senses and their mental capabilities. It is impossible to combine these senses in any elec-tronic detector. However, humans are constantly on the move, and a person may not be physically present

when the fire starts; or he might be ill, asleep, or not in the right state of mind in order to detect the fire.

Second: The different types of alarm systems:

1. Conventional: This system relies on a group of interlinked detectors over a certain area, all of which send a warning to the security personnel watching over that area in the instance of a fire.

2. Addressable: This system consists of a group of interlinked detectors in an area, but each device is given a number and an address so that the sounding alarm can be traced to the right place in the instance of a fire breaking out.

Third: Fire Detection Devices

These devices detect smoke, heat and flames, and they are able to detect a fire from its onset. In this way, the fire can be fought and area evacuated before the fire has the chance to spread. Deciding which kind of detector should be used requires knowing which kinds of pos-