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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. PIR sensors detect general movement, but do not give ...

3. Security alarm - Wikipedia

   en.wikipedia.org/wiki/Security_alarm

   A passive infrared sensor used to detect motion. The passive infrared (PIR) motion detector is one of the most common sensors found in household and small business environments. This sensor does not generate or radiate energy; it works entirely by detecting the heat energy given off by other objects. PIR sensors identify abrupt changes in ...

4. Occupancy sensor - Wikipedia

   en.wikipedia.org/wiki/Occupancy_sensor

   Occupancy sensors for lighting control typically use infrared (IR), ultrasonic, tomographic motion detection, microwave sensors, or camera-based sensors (image processing). [12] The field of view of the sensor must be carefully selected/adjusted so that it responds only to motion in the space served by the controlled lighting. For example, an ...

5. Motion detector - Wikipedia

   en.wikipedia.org/wiki/Motion_detector

   [citation needed] For example, many dual-tech sensors combine both a PIR sensor and a microwave sensor into one unit. For motion to be detected, both sensors must trip together. [citation needed] This lowers the probability of a false alarm since heat and light changes may trip the (passive infrared) PIR but not the microwave, or moving tree ...

6. Infrared detector - Wikipedia

   en.wikipedia.org/wiki/Infrared_detector

   An infrared detector is a detector that reacts to infrared (IR) radiation. The two main types of detectors are thermal and photonic (photodetectors). The thermal effects of the incident IR radiation can be followed through many temperature dependent phenomena. [2] Bolometers and microbolometers are based on changes in resistance.

7. Putin promises to ask Assad about whereabouts of American ...

   www.aol.com/news/putin-promises-ask-assad...

   Russian President Vladimir Putin said he would enquire about the whereabouts of Austin Tice, the American journalist missing in Syria, while responding to a question from an NBC correspondent at ...

8. Simona Halep withdraws from Australian Open qualifying ...

   www.aol.com/simona-halep-withdraws-australian...

   FILE - Simona Halep, of Romania, returns a shot to Daria Snigur, of Ukraine, during the first round of the U.S. Open tennis tournament, Aug. 29, 2022, in New York.

9. Camera trap - Wikipedia

   en.wikipedia.org/wiki/Camera_trap

   A camera trap with a passive infrared (PIR) sensor. A camera trap is a camera that is automatically triggered by motion in its vicinity, like the presence of an animal or a human being. It is typically equipped with a motion sensor—usually a passive infrared (PIR) sensor or an active infrared (AIR) sensor using an infrared light beam. [1]