SECURITY SYSTEMS & SOLUTIONS
Fire alarm systems have devices connected to them to detect the fire/smoke or to alert the occupants of an emergency. Below is a list of common devices found on a fire alarm.
Manual Pull Stations/Manual call points – Devices to allow people to manually activate the fire alarm. Usually located near exits. Also called “manual pull boxes”. Other countries have different devices as standard, for example the UK uses ‘break-glasses’, when people break a small pane of glass to activate the alarm.
Smoke Detectors – Spot type: Photoelectric and Ionization; Line type: Projected Beam Smoke Detector; Air-Sampling type: Cloud Chamber
Water Flow Switches – Detect when water is flowing through the fire sprinkler system
Rate-of-Rise and Thermostat (heat) Detectors – Detect heat changes
Valve Supervisory Switch – Indicates that a fire sprinkler system valve that is required to be open, is now closed (off-normal).
Carbon Monoxide Detectors – Detects poisonous carbon monoxide gas and usually only connected to household fire alarm systems. Very rarely seen in commercial systems.
How Optical Smoke Detector Work ? An optical smoke alarm (also called photo-electric smoke alarm) works using the light scatter...READ MORE
How Heat Detectors Work ? A heat alarm is designed to detect heat instead of smoke, the alarm contains a...READ MORE
Multi Sensor Detector
Multi-Criteria Detectors Comprise of two or more sensors within the same housing, integrated by the detector electronics or software to...READ MORE
Optical Beam Detectors work on the principle of projecting a beam of light across a room, which is attenuated when...READ MORE
Manual Call Point
People can often still detect a fire long before automatic fire detectors; hence manual call points are important components of...READ MORE
Fire Alarm Siren
Audible Alarm Signals Audible fire alarm signals must provide a clear warning of a fire to all those for whom...READ MORE