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  2. Motion detector - Wikipedia

    en.wikipedia.org/wiki/Motion_detector

    A motion detector attached to an outdoor, automatic light. A motion detector is an electrical device that utilizes a sensor to detect nearby motion (motion detection).Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area.

  3. Exit control lock - Wikipedia

    en.wikipedia.org/wiki/Exit_control_lock

    Exit control systems can include a "request to exit detector" such as a pushbutton that opens the exit if exit requests are enabled. In other facilities, entrances as well as exits require authentication such as swiping or otherwise reading a card with a card reader. If an intruder slips by the entrance controls of a building, they will be able ...

  4. Child safety lock - Wikipedia

    en.wikipedia.org/wiki/Child_safety_lock

    A child safety lock is a special-purpose lock for cabinets, drawers, bottles, etc. that is designed to help prevent children from getting at any dangerous things or contents. Young children are naturally curious about their surroundings and will always explore, but as they may be unaware of dangerous substances or situations, the results can be ...

  5. The Mosquito - Wikipedia

    en.wikipedia.org/wiki/The_Mosquito

    The idea was born after he was irritated by a factory noise when he was a child. [6] The push to create the product was when Stapleton's 17-year-old daughter went to the store to buy milk and was harassed by a group of 12- to 15-year-olds. Using his children as test subjects, he determined the frequency of "The Mosquito". [7]

  6. Protector lock - Wikipedia

    en.wikipedia.org/wiki/Protector_lock

    The Crystal Palace Exhibition, where Hobbs, designer of the Protector lock, became the first person to pick the supposedly "unpickable" Chubb detector lock.. The Protector lock (also called the "moveable lock") was an early 1850s lock design by the leading American locksmith Alfred Charles Hobbs, the first man to pick the six-levered Chubb detector lock, at the Crystal Palace Exhibition in 1851.

  7. Passive infrared sensor - Wikipedia

    en.wikipedia.org/wiki/Passive_infrared_sensor

    A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors . PIR sensors are commonly used in security alarms and automatic lighting applications.

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