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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. 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.

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. 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 ...

6. Man Called Toddler's Mother About Abnormal Breathing ... - AOL

   www.aol.com/man-called-toddlers-mother-abnormal...

   A Kentucky man is accused of murdering a 18-month-old child he had been watching after the child suffered several serious injuries. Police in Elizabethtown, Ky., say that Terrance Corbin, 20, was ...

7. 14 Things That Might Be Causing Pain in Your Lower Left Abdomen

   www.aol.com/14-things-might-causing-pain...

   Diverticulitis occurs when small pouches in the wall of your colon, called diverticula, get inflamed or infected, Dr. Boxer explains. “It usually causes pain on the lower left side of your belly ...