Fire alarm device
A fire alarm system is a collection of devices installed in buildings to provide warning of fire, usually consisting of smoke detectors, heat detectors, or other types. These alarms are usually activated by smoke or extremely high temperature within the protected area and the rapid accumulation of poisonous gases created by fires. Fire alarm systems can also be supplemented or replaced by automated fire sprinkler systems.
Each fire alarm system is designed to detect a certain type of fire and consists of more detectors.
Floor-level sensors in the area protected by the system will trigger an alarm at a fire panel when heat is detected rising from below. Smoke detectors allow detection throughout the vertical openings through a floor a ceiling. Heat detectors operate by sensing infrared heat radiated from fires outward like a radar antenna and then backscattered toward the detector (like an airplane’s Radar). The two types of heat detectors are directional and omnidirectional.
Pressure pads are also used in areas where false alarms are a problem because smoke from cooking or steam can set them off. They detect the presence of a person by sensing weight. In some jurisdictions, these devices may be prohibited for use in lieu.
Pressure pads are also used in areas where false alarms are a problem because smoke from cooking or steam can set them off. They detect the presence of a person by sensing weight. In some jurisdictions, these devices may be prohibited for use in lieu.
Fire alarm panels are control units that receive signals from various automatic fire detectors and initiating devices, activate the appropriate response to the fire emergency conditions detected, initiate an alarm, sound an alert signal at the fire panel location, and communicate with other parts of the fire alarm system. A dry-break valve is open when no water is available to stop water flow into the sprinkler pipes. The Fire Alarm Controls panel provides centralized fire alarm control.
Fire Alarm Controls panel provides centralized fire alarm control.
Sirens are typically mounted externally on the roof of a building, and sound pressure signals that alert people inside and outside of the protected premises to an emergency. Building management personnel can also use the siren(s) to alert building occupants during emergencies (e.g., tornadoes, active shooters). Sirens can too be activated through manual means such as pull stations or automated means such as fire alarm activation boards. A fire alarm sounder is an electronic device used in fire alarm systems for audible notification of emergencies. Sounders consist of horn-tone generators, pre-recorded voice messages, plain old telephone service.
A fire alarm sounder is an electronic device used in fire alarm systems for audible notification of emergencies. Sounders consist of horn-tone generators, pre-recorded voice messages, plain old telephone service.
Fire alarms are a very useful device which can help in sending signals when there is fire. With additional features, these are beneficial in other ways also. The article has covered all the major components of a fire alarm system along with its functions and benefits.