Home Security and Alarms

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Door Alarms Framingham MA

Local resource for door alarms in Framingham. 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) 542-4123
410 University Ave
Westwood, MA
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
10 Ware St
Cambridge, MA
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) 564-9618
345 Greenwood St
Worcester, MA
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

Rsig Security
(508) 881-3023
945 Concord St # 104
Framingham, MA
 
Allied Barton Security Svc
(508) 651-9138
1245 Worcester St
Natick, MA
 
ADT® Home Security
(888) 542-4123
151 Carnegie Row 5
Norwood, MA
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
345 Greenwood St Ste 4
Worcester, MA
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

Framingham Fire & Safety
(508) 626-0709
161 Concord St # R
Framingham, MA
 
Aegis Protection Group Inc
(508) 370-0700
858 Worcester Rd
Framingham, MA
 
Bay Colony Investigators Inc
(508) 653-6040
72 E Plain St
Wayland, MA
 

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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