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Door Alarms Rapid City SD

Local resource for door alarms in Rapid City. Includes detailed information on local businesses that provide access to portable door alarms, burglar alarms, door wedge alarms, door knob alarms, vibration sensors, and home security systems, as well as advice and content on security door stops.

ADT® Home Security
(888) 564-9618
540 Deadwood Ave
Rapid City, SD
Description
Get a Security System for Just $99! Protect Your Home and Call ADT® Home Security Today.
Phone Hours
MON - FRI 9:00AM - 11:00PM; SAT 9:00AM - 6:00PM; SUN CLOSED

A Plus Systems A Plus Security Inc
(605) 388-0925
2650 Jackson Boulevard
Rapid City, SD
 
Armstrong Extinguisher Svc Inc
(605) 341-3473
2609 Bridge View Dr
Rapid City, SD
 
ADT® Home Security
(888) 564-9618
540 Deadwood Ave
Rapid City, SD
Description
Get a Security System for Just $99! Protect Your Home and Call ADT® Home Security Today.
Phone Hours
MON - FRI 9:00AM - 11:00PM; SAT 9:00AM - 6:00PM; SUN CLOSED

Sioux Merchant Patrol & Sec
(605) 334-9357
1501 N Cleveland Ave
Sioux Falls, SD
 
Mountain States Security Inc
(605) 343-7448
306 Main St # 5
Rapid City, SD
 
Rushmore Extinguisher Svc
(605) 342-7111
2843 Samco Rd # Y
Rapid City, SD
 
Black Watch Inc
(605) 341-8787
4447 S Canyon Rd
Rapid City, SD
 
Big M Security & Alarm
(605) 665-9223
203 W City Limits Rd
Yankton, SD
 
Absolute Detective & Bodyguard
(605) 334-2043
601 S 1st Ave # 101
Sioux Falls, SD
 

Door Alarms

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Doors can utilize magnetic contact sensors to detect when a door is opened. The sensor mechanism is housed in the switch side of the sensor and a magnet is housed in the other half. Most door alarms utilize a contact switch, which has two metallic parts that must stay in contact when the sensor is armed. In order for a door to be slid or swung open, the mechanism's metallic contacts lose contact with one another. One half of the door sensor is attached to the fixed side of the doorway, and the other is attached to the movable door. When the door is opened the two parts of the mechanism are separated and the alarm signal is sent.

These mechanisms use a strong magnet that can maintain magnetic contact even when the door is opened slightly. This makes it possible to leave a door open to allow airflow between rooms, yet still have all the protection of armed door alarms.

Electromechanical door locks are powerful electrified lock mechanisms which keep them from being opened. They are an important form of security in commercial properties but can also be used in home security systems. These systems often integrate a magnetic contact sensor so if by chance the door should be opened, an alarm would be activated.

Learn more about home security systems .

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