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2. 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.

3. 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.

4. 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.

5. Motion detector - Wikipedia

   en.wikipedia.org/wiki/Motion_detector

   [citation needed] PIR draws less energy than emissive microwave detection, and so many sensors are calibrated so that when the PIR sensor is tripped, it activates a microwave sensor. [citation needed] [citation needed] If the latter also picks up an intruder, then the alarm is sounded.

6. 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.

7. How Nutcrackers Became a Classic Symbol of Christmas

   www.aol.com/nutcrackers-became-classic-symbol...

   There are so many enduring symbols of Christmas: the trimmed tree, stockings hung by the chimney with care, and of course, jolly Ol' Saint Nick.But for Ree Drummond, there's one Christmas ...

8. North Carolina parent arrested for choking student inside ...

   www.aol.com/news/north-carolina-parent-arrested...

   A North Carolina father was arrested Monday after allegedly storming into a high school and choking a teenage student in a caught-on-video attack. Quinton Lofton, 43, was charged with felony ...

9. Trump's deportations could shake up the restaurant industry ...

   www.aol.com/news/trumps-deportations-could-shake...

   Sweeping deportations pledged by President-elect Donald Trump could pose an economic shock for the restaurant industry in ways that echo the pandemic: pricier menus, rising wages, and shuttered ...