Home Security and Alarms

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Door Alarms Columbus NE

Local resource for door alarms in Columbus. 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.

Home Security
(402) 270-1452
663 4th Ave
Columbus, NE
 
Alarm Services
(580) 255-2021
710 West Main Street
Duncan, NE
 
ADT® Home Security
(888) 542-4123
421 S 9th St Ste 115
Lincoln, NE
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

ADT® Home Security
(888) 542-4123
502 Fortune Dr
Papillion, NE
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

General Fire & Safety Eqpt Co
(402) 556-6100
5641 S 85th Cir
Omaha, NE
 
Novicki Fire Prevention Sales
(402) 564-6508
1163 21st Ave
Columbus, NE
 
Home Security- Inc
(864) 804-4939
480 Mayfield Rd
Duncan, NE
 
ADT® Home Security
(888) 564-9618
8719 S 135th St
Omaha, NE
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

Sentinel Security
(402) 968-4999
15418 Weir St
Omaha, NE
 
Omaha Security
(402) 933-8856
7905 L St
Omaha, NE
 

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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