Smoke Detectors (Alarms)
A smoke detector is a device that detects smoke. Smoke inhalation is the primary cause of death in victims of indoor fires. The smoke kills by a combination of thermal damage, poisoning and pulmonary irritation caused by carbon monoxide, hydrogen cyanide and other combustion products.
Household detectors, known as stand alone smoke alarms, generally issue a local audible and/or visual alarm from the detector itself. The widespread use of smoke detectors in the home has resulted in significant reductions of injuries and deaths from house fires. You can cut the chance that you or someone that you love will die in a house fire simply by installing these inexpensive devices in your home.
Commercial, industrial, and mass residential smoke alarms (devices) are usually powered (wired in) by a central fire alarm system, which is powered by the main panel, with a battery backup. NFPA 72 — National Fire Alarm Code requires Annual Testing and Maintenance of your fire alarm.
Does your building comply with the latest regulations? Contact our representative.
Smoke detectors are typically housed in a disk-shaped plastic enclosure about 150 millimetres (6 in) in diameter and 25 millimetres (1 in) thick, but the shape can vary by manufacturer or product line. Most smoke detectors work either by optical detection (photoelectric - a form of fire detector having a photoelectric cell which responds when light is absorbed or scattered by smoke particles), or by physical process (ionization - When smoke enters the ionization chamber, it disrupts the electric current the smoke detector senses the drop in current sets off the horn.), while others use both detection methods to increase sensitivity to smoke. Household detectors are usually powered by batteries.
Test Smoke detectors every month following the manufacturer's directions, and replace batteries once a year, or whenever a detector "chirps" to signal low battery power. Never "borrow" a smoke detector's
battery for another use - a disabled detector can't save your life.
Replace detectors that are more than 10 years old.
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For more information, please follow one of these links:
- More on Stand Alone Smoke Alarms
- Are smoke detectors / alarms reliable
- How do I test / maintain my smoke alarm?