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  2. Security alarm - Wikipedia

    en.wikipedia.org/wiki/Security_alarm

    Change in the local magnetic field due to the presence of ferrous metals induces a current in the buried sensors (buried cables or discrete sensors) which are analyzed by the system. If the change exceeds a predetermined threshold, an alarm is generated. [ 17 ]

  3. Reed switch - Wikipedia

    en.wikipedia.org/wiki/Reed_switch

    Examples are door and window sensors in burglar alarm systems and tamperproofing methods. Reed switches have been used in laptops to put the laptop into sleep/hibernation mode when the lid is closed. Speed sensors on bicycle wheels frequently use a reed switch to actuate briefly each time a magnet on the wheel passes the sensor.

  4. Driveway alarm - Wikipedia

    en.wikipedia.org/wiki/Driveway_alarm

    Three types of sensors are commonly used in driveway alarm systems: Passive infrared Senses heat and motion. These sensors detect both vehicles and people but are prone to false alarms from animals. Magnetic probe Uses a magnetic coil to detect moving metal nearby.

  5. Perimeter intrusion detection - Wikipedia

    en.wikipedia.org/wiki/Perimeter_intrusion_detection

    A fence-mounted perimeter intrusion detection system installed on a chain link fence. A perimeter intrusion detection system ( PIDS ) is a device or sensor that detects the presence of an intruder attempting to breach the physical perimeter of a property, building, or other secured area.

  6. Electromagnetic lock - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_lock

    Magnetic locks are almost always part of a complete electronic security system. Such a system may simply consist of an attached keycard reader or may be more complex, involving connection to a central computer that monitors the building's security. Whatever the choice of locking system, fire safety is an important consideration. [2]

  7. List of sensors - Wikipedia

    en.wikipedia.org/wiki/List_of_sensors

    Attitude control (spacecraft): Horizon sensor, Earth sensor, Moon sensor, Satellite Sensor, Sun sensor; Catadioptric sensor; Chemoreceptor; Compressive sensing; Cryogenic particle detectors; Dew warning; Diffusion tensor imaging; Digital holography; Electronic tongue; Fine Guidance Sensor; Flat panel detector; Functional magnetic resonance ...

  8. The 7 Best Home Security Systems for the Money - AOL

    www.aol.com/7-best-home-security-systems...

    This is a more advanced security system, which centralizes all you need in one home security app. It includes a “smart deter” detection of lurkers, customizable smart security packages and ...

  9. Home security - Wikipedia

    en.wikipedia.org/wiki/Home_security

    A control panel is implemented to arm and disarm a home security system. The control panel is the main connection to the alarm company monitoring a home. It typically features a touchpad or buttons to easily maneuver the system, and some newer systems also feature voice control or wireless remotes (key fobs). [5]

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