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Electromagnetic Alarms Concord NH

Local resource for Electromagnetic Alarms in Concord. 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.

East Coast Security
(603) 225-0524
PO Box 2458
Concord, NH
Fire Alarm Systems
(603) 623-2130
25 Concord St
Concord, NH
Diebold Inc
(603) 224-9132
304 Sheep Davis Rd
Concord, NH
R & T Electric
(603) 224-4782
315 S Main St
Concord, NH
Home Alarm Systems
(603) 623-2130
25 Concord St
Concord, NH
Ventracom Wireless Technologies
(603) 226-0025
58 Mandevilla Ln
Concord, NH
(603) 228-3705
54 Regional Dr Ste 1
Concord, NH
White Mountain Security & Traffic Control
(603) 225-1009
10 Ferry St
Concord, NH
Asap Country Squire Security
(603) 225-8847
98 N State St
Concord, NH
Allied Security
(603) 228-3118
270 Loudon Rd
Concord, 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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