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2. Alarm sensor - Wikipedia

   en.wikipedia.org/wiki/Alarm_sensor

   In telecommunications, the term alarm sensor has the following meanings: . In communications systems, a device that can sense an abnormal condition within the system and provide a signal indicating the presence or nature of the abnormality to either a local or remote alarm indicator, and (b) may detect events ranging from a simple contact opening or closure to a time-phased automatic shutdown ...

3. Electromagnetic door holder - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_door_holder

   A simple electromagnetic door holder consists of a strong electromagnet, usually attached to a wall or mounted in a floor pedestal enclosure, next to the door it controls. The mechanism may be mounted near the floor, at the upper corner of the open door, or at any convenient height along the latch edge (away from the hinged edge).

4. Security alarm - Wikipedia

   en.wikipedia.org/wiki/Security_alarm

   Sensors: In a security alarm, some sensors detect intrusions. Sensors' locations are at the perimeter of the protected area, within it, or both. Sensors can detect intruders by different methods. Alerting devices indicate an alarm condition. Most commonly, these are bells, sirens, also and or flashing lights. Alerting devices serve the dual ...

5. Home security - Wikipedia

   en.wikipedia.org/wiki/Home_security

   Door and window sensors are also implemented in most home security systems. One part of the system is installed on the door or window itself while the other part is installed on the frame of the door or window. The two part system connects securely when a door or window is closed, creating a security circuit. [5]

6. Smart doorbell - Wikipedia

   en.wikipedia.org/wiki/Smart_doorbell

   A smart doorbell is an internet-connected doorbell that notifies the home owner on his or her device (smartphone or any other gadget) when a visitor arrives at the door. It activates when the visitor presses the button of the doorbell, or alternatively, when the doorbell senses a visitor with its built-in motion sensors. The smart doorbell lets ...

7. When you can see the Cold Moon, 2024's final full moon

   www.aol.com/see-cold-moon-2024s-final-110021227.html

   Growing number of drone sightings along East Coast causes confusion, alarm. Show comments. Advertisement. Advertisement. Holiday Shopping Guides. See all. AOL.

8. A23 battery - Wikipedia

   en.wikipedia.org/wiki/A23_battery

   Left to right: AA, AAA, AAAA, N (E90) and A23 batteries An open A23 battery showing the LR932 cells with an intact battery. The A23 battery (also referred to as 23AE, GP23A, V23GA, [1] LRV08, [2] 8LR932, [3] 8LR23, MN21, L1028 or ANSI-1181A) is a dry battery consisting of eight LR932 cells, with a nominal voltage of 12 V.

9. NFL Winners and Losers: Bears embarrass themselves ... - AOL

   www.aol.com/sports/nfl-winners-losers-bears...

   Cook has become a big part of the Bills' offense since the middle of last season, and he adds a playmaking element in the run game that takes pressure off of Allen.