Any building plan should incorporate a fire alarm system as a preventative means of protection against fire. Man have always been devising various fire protection measures since the dawn of time, but the basic principles of early warning fire protection are always the same. Fire alarm devices are configured into these systems to act either as:
- safety precaution devices
Fire alarm devices can detect all instances of fire indicators at the onset of a fire. Indicators of fire include rising levels of carbon monoxide gas, the presence of smoke, and a change in the temperature level due to the heat. When two or three of these indicators are detected, it will then trigger the alarm.
An inspection can then be conducted to check on the source of alarm, and if there is any impending danger to the building and its occupants. The basic components of the fire detection device are the:
- smoke detector
- carbon monoxide detector
- thermostat detector
Other fire alarm devices have the function of detecting the presence of water within the sprinkler system. These are the water flow switch, which detects the presence of water in the sprinkler system, and the valve position switch, which indicates if a sprinkler valve is open or closed. The water flow switch and the valve position switch are very important devices in the entire fire alarm system, since they ensure that the sprinkler system is properly working and can pre-empt the fire.
Although the devices work on autopilot, fire alarm devices still incorporate the use of manual control, so that if these automatic systems ever malfunction, there still exists a means of triggering the fire alarm and the sprinkler system. These are the pull stations that you can notice near exits. When the alarm is set off, fire alarm horns and strobe lights will be switched on to guide people to the fire exits via visual and audible signals.