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-