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Automatic Fire Detection and Alarm System

Automatic Fire Detection and Alarm System

 

Automatic fire detection and alarm system is primarily a life safety system meant for detecting the fire at the early stages and alarm the occupants. The fire detection system is also used for automatic activation of fire extinguishing systems such as spray systems, water mist systems and gas suppression systems. The control relay modules in the advanced addressable detection systems enable the integration and operation of ancillary services such as electrical systems, fire dampers, access control systems, video surveillance, emergency lighting systems, emergency communication systems etc. to activate/deactivate in case of emergencies.

 

Description of Automatic Fire Detection and Alarm System as follows:

  • Conventional Fire Alarm System is a multi-zone fully transistorised automatic fire detection system.
  • Multiplex Fire Alarm System also known as “semi addressable” system.
  • Wireless Fire Detection System
  • Fully Addressable Analogue Fire Alarm Control System – With the trend towards intelligent buildings and the need to reduce wiring in large installations, the company is using fully addressable analogue detectors and input/output modules.
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    Analogue-addressable fire alarm systems give details on individual detectors, whereas conventional systems only give information about specific circuits or zones. Addressable or “intelligent” fire alarm systems are designed for large commercial premises and more complex networked systems, since they are much more expensive and more complicated than conventional two- or four-wire systems, having increased flexibility, intelligence, speed of identification, and scope of control.

     

    Types of Detectors

  • Spot type detector
  • Photo electric smoke detector
  • Ionisation type smoke detector
  • Heat detectors
  • Fixed temperature type
  • Rate of Rise type
  • Multi sensor detectors
  • Projected Beam type detector
  • Infra Red Detectors
  • UV/IR type detectors
  • Flame type detector
  • UV flame detector
  • IR flame detector
  • Spark/Ember detector
  • Air Sampling type detector
  • Linear Heat Sensing Cable
  • Video Image Fire Detector
  • Aspirating Smoke Detector
  • Open-area Smoke Imaging Detection (OSID) – The OSID system consists of up to seven Emitters for the 90° Imager unit, located along the perimeter of the protected area, and an Imager mounted opposite. Each component can be mounted directly to the surface or can be secured with the supplied mounting brackets. Battery powered Emitters with three or five years battery life are also available to reduce installation time and cost.
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    The efficiency of a fire detection and alarm system depends on various factors such as selection of suitable type of detector, spacing between detectors, mounting locations, rate of air flow, room temperature, humidity level, presence of dust particles, type of ceiling etc.