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Electromagnetic Alarms Dover NH

Local resource for Electromagnetic Alarms in Dover. Includes detailed information on local businesses that provide access to Electromagnetic Alarms, keyless entry, garage door opener, driveway alarm, as well as advice and content on electromagnetic and electronic alarm system retailers and stores in your location.

Seacoast Security Of NH LLC
(603) 742-5999
173 Dover Point Rd
Dover, NH
 
Alarm Masters
(330) 364-6991
517 East Iron Avenue
Dover, NH
 
Quality Fire Protection
(207) 384-6211
15 Old South Rd # A
South Berwick, ME
 
K & B Electronic Security Systems
(919) 471-8252
2809 Broad Street
Durham, NH
 
Casco Security Systems
(585) 424-5000
1344 University Ave
Rochester, NH
 
Burns Security DM Inc
(603) 742-3212
100 Central Ave
Dover, NH
 
Rockingham Security
(603) 742-8230
42 Dover Point Rd # L
Dover, NH
 
Carolina Security Systems
(919) 479-9929
3824 North Duke Street
Durham, NH
 
Barrington Security Systems Inc
(856) 546-0796
130 Moore Avenue
Barrington, NH
 
Brinks Home Security
(585) 377-1790
Linden Oaks
Rochester, NH
 

Electromagnetic Detection

Most intrusion detection systems in use today utilize some form of electrical circuit running through wires, mechanisms, metalized tape or foil. If any part of the electric circuit running through two pieces of metal in the door locks or window lock mechanisms , or if a strip of metallic tape on the window glass is broken, it trips an alarm.

Circuits work well when an intruder attempts entry as one would expect, by opening a door or window. Burglars however, know how to use crowbars and other burglary tools to get through doors without disrupting these electrical circuits. In warm climate regions, houses may have thin walls, and entry can be gained by cutting through a wall. Tape or wire mesh in the wall would have to be torn or cut through to gain entry, thus tripping the security alarms .

Limitations occur in a circuit system because the gap or break can be bridged when the burglar breaks the tape or magnetic connection with a long wire or piece of metalized tape, prying open a door or window frame without setting off the alarm.

Magnetic Contact Circuits

Electromagnetic systems are often used on doors to apartment buildings and secure areas in government offices. They use a magnet in one sealed enclosure and a switch in another sealed enclosure and when the magnetic contact is broken, the alarm signal sounds.

In order to open a door protected with a magnetic door latch, a button has to be pushed by an attendant to allow the door to be opened by the visitor...

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