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Door Alarms Jefferson City MO

Local resource for door alarms in Jefferson 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.

Smart Solutions Inc
(573) 638-0200
1931 W Main St
Jefferson City, MO
 
Fire Specialists Of Missouri
(573) 636-2222
705 Jefferson St
Jefferson City, MO
 
Korsmeyer Fire Protection
(573) 659-8805
5008 Contractors Ln
Jefferson City, MO
 
North Star Systems Inc
(573) 657-4300
7480 E Angel Ln
Ashland, MO
 
ADT® Home Security
(888) 564-9618
1915 W Woodland Street
Springfield, MO
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

Coy's Fire Protection Llc
(573) 659-9100
3618 Mall Ridge St
Jefferson City, MO
 
Sonitrol
(573) 636-7799
314 Lafayette St
Jefferson City, MO
 
Securitas Security Svc USA Inc
(573) 761-0776
1015 Madison St
Jefferson City, MO
 
ADT® Home Security
(888) 542-4123
1925 Belt Way Dr
Saint Louis, MO
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
110 Long Rd
Chesterfield, MO
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

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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