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  2. Staircase timer - Wikipedia

    en.wikipedia.org/wiki/Staircase_timer

    As PIR sensors are not perfectly reliable a timer is needed to avoid the lights flashing off and on as the occupier moves out of detector range. The timer interval is short though compared to a push-button timer; it times the interval between sightings of the occupier, not the time of occupancy. Such sensors are also used for restrooms.

  3. 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.

  4. Security alarm - Wikipedia

    en.wikipedia.org/wiki/Security_alarm

    PIR sensors identify abrupt changes in temperature at a given point. As an intruder walks in front of the sensor, the temperature at that point will rise from room temperature to body temperature and then back again. This quick change triggers the detection. PIR sensors designed to be wall- or ceiling-mounted come in various fields of view ...

  5. 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.

  6. Occupancy sensor - Wikipedia

    en.wikipedia.org/wiki/Occupancy_sensor

    Occupancy sensor types include: PIR sensors, which work on heat difference detection, measuring infrared radiation.Inside the device is a pyroelectric sensor which can detect the sudden presence of objects (such as humans) who radiate a temperature different from the temperature of the background, such as the room temperature of a wall.

  7. HomeSeer - Wikipedia

    en.wikipedia.org/wiki/HomeSeer

    In 2017, HomeSeer released three battery operated Z-Wave sensors. HS-DS100+ (door/window sensor) was released in January and HS-MS100+ (PIR sensor) and HS-LS100+ (water sensor) were both released in December. Support for Google Home was also added to allow Google Home devices to control HomeSeer system devices and events.

  8. Infrared detector - Wikipedia

    en.wikipedia.org/wiki/Infrared_detector

    Prototype of high-speed infrared detector installed on the PIONIER instrument at ESO’s Paranal Observatory. [1]An infrared detector is a detector that reacts to infrared (IR) radiation.

  9. Remote camera - Wikipedia

    en.wikipedia.org/wiki/Remote_camera

    Remote camera. Top shows several LED flash lights, centre are the lens and PIR sensors. A remote camera, also known as a trail camera or game camera, is a camera placed by a photographer in areas where the photographer generally cannot be at the camera to snap the shutter.

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