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2. Passive infrared sensor - Wikipedia

   en.wikipedia.org/wiki/Passive_infrared_sensor

   An indoor light switch equipped with PIR-based occupancy sensor [1] A PIR-based motion detector is used to sense movement of people, animals, or other objects. They are commonly used in burglar alarms and automatically activated lighting systems.

3. Occupancy sensor - Wikipedia

   en.wikipedia.org/wiki/Occupancy_sensor

   An indoor light switch equipped with PIR-based occupancy sensor [1]. An occupancy sensor is an indoor device used to detect the presence of a person. Applications include automatic adjustment of lights or temperature or ventilation systems in response to the quantity of people present.

4. 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.

5. Home security products to protect against squatters ... - AOL

   www.aol.com/home-security-products-protect...

   Outdoor and indoor security cameras. Doorbell camera. Smart light bulbs. Door stop with alarm. Window alarm. The installation of surveillance cameras is a great first step towards home security.

6. 'Bright and reliable': These motion-sensor solar security ...

   www.aol.com/lifestyle/bright-reliable-motion...

   You can't ignore 19,000 five-star reviews! It's not easy to find solar lights that actually work and stand the test of time — save 65%.

7. Lighting control system - Wikipedia

   en.wikipedia.org/wiki/Lighting_control_system

   A complete sensor consists of a motion detector, an electronic control unit, and a controllable switch/relay. The detector senses motion and determines whether there are occupants in the space. [9] It also has a timer that signals the electronic control unit after a set period of inactivity.