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  2. Smoke detector - Wikipedia

    en.wikipedia.org/wiki/Smoke_detector

    Residential smoke alarms are usually powered with a 9-volt battery, or by mains electricity. Some smoke alarms use a combination of the 2; usually using a battery as an extra power source in the event of an outage. Commercial smoke detectors issue a signal to a fire alarm control panel as part of a fire alarm system. Usually, an individual ...

  3. Fire alarm system - Wikipedia

    en.wikipedia.org/wiki/Fire_alarm_system

    Residential fire alarm systems are commonplace. Typically, residential fire alarm systems are installed along with security alarm systems. In the United States, a residential fire alarm system is required in buildings where more than 12 smoke detectors are needed. [19] Residential systems generally have fewer parts compared to commercial systems.

  4. Active fire protection - Wikipedia

    en.wikipedia.org/wiki/Active_fire_protection

    A common, residential smoke detector sounds an alarm when smoke is detected. Fire detection works using smoke or heat sensors. These systems are very effective tool at alerting people in the immediate vicinity of where the fire is detected but building regulations [9] require an integrated fire detection system.

  5. Standards for Alarm Systems, Installation, and Monitoring

    en.wikipedia.org/wiki/Standards_for_Alarm...

    The standard details requirements for a range of alarm systems including central station burglar alarms, police station connected alarms, local alarms, proprietary systems, holdup alarms, and digital alarm communicator system units. It also covers power supplies essential for burglar-alarm equipment operation.

  6. How to reset a smoke alarm that won’t stop beeping - AOL

    www.aol.com/reset-smoke-alarm-won-t-205535790.html

    $19.99 at Amazon . If you have a hard time remembering to replace your smoke alarm’s battery each year, the Kidde Smoke Detector can help. Its 10-year lithium battery doesn’t need to be replaced.

  7. Fire alarm notification appliance - Wikipedia

    en.wikipedia.org/wiki/Fire_alarm_notification...

    This pattern, which is also used for smoke alarms, is named the Temporal-Three alarm signal, often referred to as "T-3" or "Code-3" (ISO 8201 and ANSI/ASA S3.41 Temporal Pattern) and produces an interrupted four count (three half second pulses, followed by a one and one half second pause, repeated for a minimum of 180 seconds).