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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. 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]

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

   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. Sanbot (robot) - Wikipedia

   en.wikipedia.org/wiki/Sanbot_(robot)

   External Wheel Hub Motor x 4, Mecanum Wheel x 4, Infrared Distance Sensor x 18, Ultrasonic Sensor x 6, 3D Camera x 4, Vision Camera x 1, Subwoofer x 1, Drawbar x 1, On/Off Switch x 1, Charging Port x 1, Charging Indicator Light x 1, Turn Signal x 3, Magnetic Sensor x 2, RFID x 1, RJ45 Ethernet Port x 1, DC 12V Port x 1, AUDIO IN Port x 1

7. 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 ...